mirror of
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4df8c11d26
* configure.in: Recognize --enable-bind-now. * elf/dynamic-link.h (elf_get_dynamic_info): Allow bind-now flags in ld.so. * Makerules (LDFLAGS-c.so): Add -z now if so configured. * elf/Makefile ($(objpfx)ld.so): Likewise. * config.make.in (bind-now): New definition.
2096 lines
61 KiB
Plaintext
2096 lines
61 KiB
Plaintext
dnl Process this file with autoconf to produce a configure script.
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AC_REVISION([$CVSid$])
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AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
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AC_INIT([GNU C Library], [(see version.h)], [glibc])
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AC_CONFIG_SRCDIR([include/features.h])
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AC_CONFIG_HEADERS([config.h])
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AC_CONFIG_AUX_DIR([scripts])
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if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
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AC_MSG_ERROR([you must configure in a separate build directory])
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fi
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# This will get text that should go into config.make.
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config_vars=
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# Check for a --with-gmp argument and set gmp-srcdir in config.make.
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AC_ARG_WITH([gmp],
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AC_HELP_STRING([--with-gmp=DIRECTORY],
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[find GMP source code in DIRECTORY (not needed)]),
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[
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case "$with_gmp" in
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yes) AC_MSG_ERROR([--with-gmp requires an argument; use --with-gmp=DIRECTORY]) ;;
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''|no) ;;
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*) config_vars="$config_vars
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gmp-srcdir = $withval" ;;
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esac
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])
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# Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
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AC_ARG_WITH([gd],
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AC_HELP_STRING([--with-gd=DIR],
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[find libgd include dir and library with prefix DIR]),
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[dnl
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case "$with_gd" in
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yes|''|no) ;;
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*) libgd_include="-I$withval/include"
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libgd_ldflags="-L$withval/lib" ;;
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esac
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])
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AC_ARG_WITH([gd-include],
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AC_HELP_STRING([--with-gd-include=DIR],
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[find libgd include files in DIR]),
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[dnl
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case "$with_gd_include" in
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''|no) ;;
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*) libgd_include="-I$withval" ;;
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esac
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])
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AC_ARG_WITH([gd-lib],
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AC_HELP_STRING([--with-gd-lib=DIR],
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[find libgd library files in DIR]),
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[dnl
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case "$with_gd_lib" in
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''|no) ;;
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*) libgd_ldflags="-L$withval" ;;
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esac
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])
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if test -n "$libgd_include"; then
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config_vars="$config_vars
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CFLAGS-memusagestat.c = $libgd_include"
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fi
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if test -n "$libgd_ldflags"; then
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config_vars="$config_vars
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libgd-LDFLAGS = $libgd_ldflags"
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fi
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dnl Arguments to specify presence of other packages/features.
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AC_ARG_WITH([fp],
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AC_HELP_STRING([--with-fp],
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[if using floating-point hardware @<:@default=yes@:>@]),
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[with_fp=$withval],
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[with_fp=yes])
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AC_SUBST(with_fp)
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AC_ARG_WITH([binutils],
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AC_HELP_STRING([--with-binutils=PATH],
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[specify location of binutils (as and ld)]),
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[path_binutils=$withval],
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[path_binutils=''])
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AC_ARG_WITH([elf],
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AC_HELP_STRING([--with-elf],
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[if using the ELF object format]),
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[elf=$withval],
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[elf=no])
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AC_ARG_WITH([xcoff],
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AC_HELP_STRING([--with-xcoff],
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[if using the XCOFF object format]),
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[xcoff=$withval],
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[xcoff=no])
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AC_ARG_WITH([cvs],
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AC_HELP_STRING([--without-cvs],
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[if CVS should not be used]),
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[with_cvs=$withval],
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[with_cvs=yes])
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if test "$with_cvs" = yes; then
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if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
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then
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with_cvs=no
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fi
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fi
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AC_SUBST(with_cvs)
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AC_ARG_WITH([headers],
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AC_HELP_STRING([--with-headers=PATH],
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[location of system headers to use
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(for example /usr/src/linux/include)
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@<:@default=compiler default@:>@]),
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[sysheaders=$withval],
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[sysheaders=''])
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AC_ARG_ENABLE([sanity-checks],
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AC_HELP_STRING([--disable-sanity-checks],
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[really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
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[enable_sanity=$enableval],
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[enable_sanity=yes])
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AC_SUBST(enable_check_abi)
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AC_ARG_ENABLE([check-abi],
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AC_HELP_STRING([--enable-check-abi],
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[do "make check-abi" in "make check" (no/warn/yes)
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@<:@default=no@:>@]),
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[enable_check_abi=$enableval],
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[enable_check_abi=no])
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dnl Arguments to enable or disable building the static, shared, profiled,
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dnl and -fomit-frame-pointer libraries.
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dnl I've disabled this for now since we cannot build glibc without static
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dnl libraries built in the moment.
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dnl AC_ARG_ENABLE([static],
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dnl AC_HELP_STRING([--enable-static],
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dnl [build static library @<:@default=yes@:>@]),
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dnl [static=$enableval],
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dnl [static=yes])
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static=yes
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AC_ARG_ENABLE([shared],
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AC_HELP_STRING([--enable-shared],
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[build shared library @<:@default=yes if GNU ld & ELF@:>@]),
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[shared=$enableval],
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[shared=default])
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AC_ARG_ENABLE([profile],
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AC_HELP_STRING([--enable-profile],
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[build profiled library @<:@default=yes@:>@]),
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[profile=$enableval],
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[profile=yes])
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AC_ARG_ENABLE([omitfp],
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AC_HELP_STRING([--enable-omitfp],
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[build undebuggable optimized library @<:@default=no@:>@]),
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[omitfp=$enableval],
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[omitfp=no])
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AC_ARG_ENABLE([bounded],
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AC_HELP_STRING([--enable-bounded],
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[build with runtime bounds checking @<:@default=no@:>@]),
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[bounded=$enableval],
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[bounded=no])
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AC_ARG_ENABLE([versioning],
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AC_HELP_STRING([--disable-versioning],
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[do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
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[enable_versioning=$enableval],
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[enable_versioning=yes])
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AC_ARG_ENABLE([oldest-abi],
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AC_HELP_STRING([--enable-oldest-abi=ABI],
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[configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
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[oldest_abi=$enableval],
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[oldest_abi=no])
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if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
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oldest_abi=default
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else
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AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
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fi
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AC_SUBST(oldest_abi)
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dnl Generic infrastructure for drop-in additions to libc.
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AC_ARG_ENABLE([add-ons],
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AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
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[configure and build add-ons in DIR1,DIR2,... search for add-ons if no parameter given]),
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[case "$enableval" in
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yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
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test "$add_ons" = "*" && add_ons= ;;
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*) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
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esac],
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[add_ons=])
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dnl Let the user avoid using TLS. Don't know why but...
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dnl XXX For now we disable support by default.
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AC_ARG_WITH([tls],
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AC_HELP_STRING([--with-tls],
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[enable support for TLS]),
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[usetls=$withval],
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[usetls=no])
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AC_ARG_WITH([__thread],
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AC_HELP_STRING([--without-__thread],
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[do not use TLS features even when supporting them]),
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[use__thread=$withval],
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[use__thread=yes])
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AC_ARG_ENABLE([hidden-plt],
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AC_HELP_STRING([--disable-hidden-plt],
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[do not hide internal function calls to avoid PLT]),
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[hidden=$enableval],
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[hidden=yes])
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if test "x$hidden" = xno; then
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AC_DEFINE(NO_HIDDEN)
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fi
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AC_ARG_ENABLE([bind-now],
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AC_HELP_STRING([--enable-bind-now],
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[disable lazy relocations in DSOs]),
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[bindnow=$enableval],
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[bindnow=no])
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AC_SUBST(bindnow)
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AC_CONFIG_SUBDIRS([ ])dnl Bonehead new Autoconf whines if we do it cleanly.
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add_ons_pfx=
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if test x"$add_ons" != x; then
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for f in $add_ons; do
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# Some sanity checks
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if test "$f" = "crypt"; then
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AC_MSG_ERROR([
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*** It seems that you're using an old \`crypt' add-on. crypt is now
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*** part of glibc and using the old add-on will not work with this
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*** release. Start again with fresh sources and without the old
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*** \`crypt' add-on.])
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fi
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if test "$f" = "localedata"; then
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AC_MSG_ERROR([
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*** It seems that you're using an old \`localedata' add-on. localedata
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*** is now part of glibc and using the old add-on will not work with
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*** this release. Start again with fresh sources and without the old
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*** \`localedata' add-on.])
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fi
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# Test whether such a subdir really exists.
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if test -d $srcdir/$f; then
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add_ons_pfx="$add_ons_pfx $f/"
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dnl This variable is what AC_CONFIG_SUBDIRS is supposed to set,
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dnl but the new Autoconf maintainers don't care about compatibility
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dnl so we cannot use it normally any more without complaints.
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subdirs="$subdirs $f"
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else
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AC_MSG_ERROR(add-on directory \"$f\" does not exist)
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fi
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done
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fi
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dnl On some platforms we cannot use dynamic loading. We must provide
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dnl static NSS modules.
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AC_ARG_ENABLE([static-nss],
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AC_HELP_STRING([--enable-static-nss],
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[build static NSS modules @<:@default=no@:>@]),
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[static_nss=$enableval],
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[static_nss=no])
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dnl Enable static NSS also if we build no shared objects.
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if test x"$static_nss" = xyes || test x"$shared" = xno; then
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static_nss=yes
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AC_DEFINE(DO_STATIC_NSS)
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fi
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AC_ARG_ENABLE([force-install],
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AC_HELP_STRING([--disable-force-install],
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[don't force installation of files from this package, even if they are older than the installed files]),
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[force_install=$enableval],
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[force_install=yes])
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AC_SUBST(force_install)
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dnl On some platforms we allow dropping compatibility with all kernel
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dnl versions.
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AC_ARG_ENABLE([kernel],
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AC_HELP_STRING([--enable-kernel=VERSION],
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[compile for compatibility with kernel not older than VERSION]),
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[minimum_kernel=$enableval],
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[])
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dnl Prevent unreasonable values.
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if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
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# Better nothing than this.
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minimum_kernel=""
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else
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if test "$minimum_kernel" = current; then
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minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
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fi
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fi
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dnl For the development we sometimes want gcc to issue even more warnings.
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dnl This is not the default since many of the extra warnings are not
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dnl appropriate.
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AC_ARG_ENABLE([all-warnings],
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AC_HELP_STRING([--enable-all-warnings],
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[enable all useful warnings gcc can issue]),
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[all_warnings=$enableval],
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[])
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AC_SUBST(all_warnings)
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AC_CANONICAL_HOST
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# The way shlib-versions is used to generate soversions.mk uses a
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# fairly simplistic model for name recognition that can't distinguish
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# i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
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# of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
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# tell. This doesn't get used much beyond that, so it's fairly safe.
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case "$host_os" in
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linux*)
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;;
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gnu*)
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host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
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;;
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esac
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# We keep the original values in `$config_*' and never modify them, so we
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# can write them unchanged into config.make. Everything else uses
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# $machine, $vendor, and $os, and changes them whenever convenient.
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config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
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# Don't allow vendor == "unknown"
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test "$config_vendor" = unknown && config_vendor=
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config_os="`echo $config_os | sed 's/^unknown-//'`"
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# Some configurations imply other options.
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case "$host_os" in
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gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
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# These systems always use GNU tools.
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gnu_ld=yes gnu_as=yes ;;
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esac
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case "$host_os" in
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# i586-linuxaout is mangled into i586-pc-linux-gnuaout
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linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
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;;
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gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
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# These systems (almost) always use the ELF format.
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elf=yes
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;;
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aix*)
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# These systems are always xcoff
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xcoff=yes
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elf=no
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;;
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esac
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machine=$config_machine
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vendor=$config_vendor
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os=$config_os
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# config.guess on some IBM machines says `rs6000' instead of `powerpc'.
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# Unify this here.
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if test "$machine" = rs6000; then
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machine="powerpc"
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fi
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# Braindead PowerPC box with absolutely no FPU.
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case "$machine-$host_os" in
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powerpc*-*soft)
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with_fp=no
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;;
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esac
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###
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### I put this here to prevent those annoying emails from people who cannot
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### read and try to compile glibc on unsupported platforms. --drepper
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###
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### By using the undocumented --enable-hacker-mode option for configure
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### one can skip this test to make the configuration not fail for unsupported
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### platforms.
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###
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if test -z "$enable_hacker_mode"; then
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case "$machine-$host_os" in
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*-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
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;;
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*)
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echo "*** The GNU C library is currently not available for this platform."
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echo "*** So far nobody cared to port it and if there is no volunteer it"
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echo "*** might never happen. So, if you have interest to see glibc on"
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echo "*** this platform visit"
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echo "*** http://www.gnu.org/software/libc/porting.html"
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echo "*** and join the group of porters"
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exit 1
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;;
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esac
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fi
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dnl We need to use [ and ] for other purposes for a while now.
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changequote(,)dnl
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# Expand the configuration machine name into a subdirectory by architecture
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# type and particular chip.
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case "$machine" in
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a29k | am29000) base_machine=a29k machine=a29k ;;
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alpha*) base_machine=alpha machine=alpha/$machine ;;
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arm*) base_machine=arm machine=arm/arm32/$machine ;;
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c3[012]) base_machine=cx0 machine=cx0/c30 ;;
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c4[04]) base_machine=cx0 machine=cx0/c40 ;;
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hppa*64*) base_machine=hppa machine=hppa/hppa64 ;;
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hppa*) base_machine=hppa machine=hppa/hppa1.1 ;;
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i[3456]86) base_machine=i386 machine=i386/$machine ;;
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ia64) base_machine=ia64 machine=ia64 ;;
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m680?0) base_machine=m68k machine=m68k/$machine ;;
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m68k) base_machine=m68k machine=m68k/m68020 ;;
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m88???) base_machine=m88k machine=m88k/$machine ;;
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m88k) base_machine=m88k machine=m88k/m88100 ;;
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mips64*) base_machine=mips64
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case "$CC $CFLAGS $CPPFLAGS " in
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*" -mabi=n32 "*) mips_cc_abi=n32 ;;
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*" -mabi=64 "*|*" -mabi=n64 "*) mips_cc_abi=64 ;;
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*" -mabi=32 "*|*" -mabi=o32 "*) mips_cc_abi=32 ;;
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*) mips_cc_abi=default ;;
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esac
|
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case $config_os in
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|
*abin32*) mips_config_abi=n32 ;;
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*abi64*|*abin64*) mips_config_abi=64 ;;
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*abi32*|*abio32*) mips_config_abi=32 ;;
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*) mips_config_abi=$mips_cc_abi ;;
|
|
esac
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|
case $mips_config_abi in
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default) machine=mips/mips64/n32 mips_config_abi=n32 ;;
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n32) machine=mips/mips64/n32 ;;
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64) machine=mips/mips64/n64 ;;
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32) machine=mips/mips32/kern64 ;;
|
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esac
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machine=$machine/$config_machine
|
|
if test $mips_config_abi != $mips_cc_abi; then
|
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# This won't make it to config.make, but we want to
|
|
# set this in case configure tests depend on it.
|
|
CPPFLAGS="$CPPFLAGS -mabi=$mips_config_abi"
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fi
|
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;;
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mips*) base_machine=mips machine=mips/mips32/$machine ;;
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|
powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
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|
powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
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|
s390) base_machine=s390 machine=s390/s390-32 ;;
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|
s390x) base_machine=s390 machine=s390/s390-64 ;;
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|
sh3*) base_machine=sh machine=sh/sh3 ;;
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sh4*) base_machine=sh machine=sh/sh4 ;;
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|
sparc | sparcv[67])
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base_machine=sparc machine=sparc/sparc32 ;;
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sparcv8 | supersparc | hypersparc)
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|
base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
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|
sparcv8plus | sparcv8plusa | sparcv9)
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base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
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|
sparcv8plusb | sparcv9b)
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base_machine=sparc machine=sparc/sparc32/sparcv9b ;;
|
|
sparc64 | ultrasparc)
|
|
base_machine=sparc machine=sparc/sparc64 ;;
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|
sparc64b | ultrasparc3)
|
|
base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
|
|
thumb*) base_machine=thumb machine=arm/thumb/$machine ;;
|
|
*) base_machine=$machine ;;
|
|
esac
|
|
changequote([,])dnl
|
|
AC_SUBST(base_machine)
|
|
|
|
if test "$base_machine" = "i386"; then
|
|
AC_DEFINE(USE_REGPARMS)
|
|
fi
|
|
|
|
# Compute the list of sysdep directories for this configuration.
|
|
# This can take a while to compute.
|
|
sysdep_dir=$srcdir/sysdeps
|
|
AC_MSG_CHECKING(sysdep dirs)
|
|
dnl We need to use [ and ] for other purposes for a while now.
|
|
changequote(,)dnl
|
|
# Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
|
|
os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
|
|
|
|
case "$os" in
|
|
gnu*)
|
|
base_os=mach/hurd ;;
|
|
netbsd* | 386bsd* | freebsd* | bsdi*)
|
|
base_os=unix/bsd/bsd4.4 ;;
|
|
osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
|
|
base_os=unix/bsd ;;
|
|
sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
|
|
base_os=unix/sysv ;;
|
|
irix6*)
|
|
base_os=unix/sysv/irix6/$os ;;
|
|
solaris[2-9]*)
|
|
base_os=unix/sysv/sysv4 ;;
|
|
hpux*)
|
|
base_os=unix/sysv/hpux/$os ;;
|
|
aix4.3*)
|
|
base_os=unix/sysv/aix/aix4.3 ;;
|
|
none)
|
|
base_os=standalone ;;
|
|
*)
|
|
base_os='' ;;
|
|
esac
|
|
|
|
# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
|
|
tail=$os
|
|
ostry=$os
|
|
while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
|
|
ostry="$ostry /$o"
|
|
tail=$o
|
|
done
|
|
o=`echo $tail | sed 's/[0-9]*$//'`
|
|
if test $o != $tail; then
|
|
ostry="$ostry /$o"
|
|
fi
|
|
# For linux-gnu, try linux-gnu, then linux.
|
|
o=`echo $tail | sed 's/-.*$//'`
|
|
if test $o != $tail; then
|
|
ostry="$ostry /$o"
|
|
fi
|
|
|
|
# For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
|
|
base=
|
|
tail=$base_os
|
|
while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
|
|
set $b
|
|
base="$base /$1"
|
|
tail="$2"
|
|
done
|
|
|
|
# For sparc/sparc32, try sparc/sparc32 and then sparc.
|
|
mach=
|
|
tail=$machine
|
|
while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
|
|
set $m
|
|
# Prepend the machine's FPU directory unless --without-fp.
|
|
if test "$with_fp" = yes; then
|
|
mach="$mach /$1/fpu"
|
|
else
|
|
mach="$mach /$1/nofpu"
|
|
fi
|
|
mach="$mach /$1"
|
|
tail="$2"
|
|
done
|
|
|
|
dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
|
|
changequote([,])dnl
|
|
|
|
# Find what sysdep directories exist.
|
|
sysnames=
|
|
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
|
|
for d in $add_ons_pfx ''; do
|
|
for b in $base ''; do
|
|
for m0 in $mach ''; do
|
|
for v in /$vendor ''; do
|
|
test "$v" = / && continue
|
|
for o in /$ostry ''; do
|
|
test "$o" = / && continue
|
|
for m in $mach ''; do
|
|
if test "$m0$b$v$o$m"; then
|
|
try="${d}sysdeps$m0$b$v$o$m"
|
|
test -n "$enable_debug_configure" &&
|
|
echo "$0 [DEBUG]: try $try" >&2
|
|
if test -d $srcdir/$try; then
|
|
sysnames="$sysnames $try"
|
|
{ test -n "$o" || test -n "$b"; } && os_used=t
|
|
{ test -n "$m" || test -n "$m0"; } && machine_used=t
|
|
fi
|
|
fi
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
IFS="$ac_save_ifs"
|
|
|
|
if test -z "$os_used" && test "$os" != none; then
|
|
AC_MSG_ERROR(Operating system $os is not supported.)
|
|
fi
|
|
if test -z "$machine_used" && test "$machine" != none; then
|
|
AC_MSG_ERROR(The $machine is not supported.)
|
|
fi
|
|
|
|
# We have now validated the configuration.
|
|
|
|
|
|
# If using ELF, look for an `elf' subdirectory of each machine directory.
|
|
# We prepend these rather than inserting them whereever the machine appears
|
|
# because things specified by the machine's ELF ABI should override
|
|
# OS-specific things, and should always be the same for any OS on the
|
|
# machine (otherwise what's the point of an ABI?).
|
|
if test "$elf" = yes; then
|
|
elf_dirs=
|
|
for d in $add_ons_pfx ''; do
|
|
for m in $mach; do
|
|
if test -d $srcdir/${d}sysdeps$m/elf; then
|
|
elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
|
|
fi
|
|
done
|
|
done
|
|
sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
|
|
fi
|
|
|
|
|
|
# Expand the list of system names into a full list of directories
|
|
# from each element's parent name and Implies file (if present).
|
|
set $sysnames
|
|
names=
|
|
while test $# -gt 0; do
|
|
name=$1
|
|
shift
|
|
|
|
case " $names " in *" $name "*)
|
|
# Already in the list.
|
|
continue
|
|
esac
|
|
|
|
# Report each name as we discover it, so there is no long pause in output.
|
|
echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
|
|
|
|
name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
|
|
|
|
case $name in
|
|
/*) xsrcdir= ;;
|
|
*) xsrcdir=$srcdir/ ;;
|
|
esac
|
|
test -n "$enable_debug_configure" &&
|
|
echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
|
|
|
|
if test -f $xsrcdir$name/Implies; then
|
|
# Collect more names from the `Implies' file (removing comments).
|
|
implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
|
|
implied=
|
|
for x in $implied_candidate; do
|
|
found=no
|
|
if test -d $xsrcdir$name_base/$x; then
|
|
implied="$implied $name_base/$x";
|
|
found=yes
|
|
fi
|
|
for d in $add_ons_pfx ''; do
|
|
try="${d}sysdeps/$x"
|
|
case $d in
|
|
/*) try_srcdir= ;;
|
|
*) try_srcdir=$srcdir/ ;;
|
|
esac
|
|
test -n "$enable_debug_configure" &&
|
|
echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
|
|
if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
|
|
then
|
|
implied="$implied $try"
|
|
found=yes
|
|
fi
|
|
done
|
|
if test $found = no; then
|
|
AC_MSG_WARN($name/Implies specifies nonexistent $x)
|
|
fi
|
|
done
|
|
else
|
|
implied=
|
|
fi
|
|
|
|
# Add NAME to the list of names.
|
|
names="$names $name"
|
|
|
|
# Find the parent of NAME, using the empty string if it has none.
|
|
changequote(,)dnl
|
|
parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
|
|
changequote([,])dnl
|
|
|
|
# Add the names implied by NAME, and NAME's parent (if it has one), to
|
|
# the list of names to be processed (the argument list). We prepend the
|
|
# implied names to the list and append the parent. We want implied
|
|
# directories to come before further directories inferred from the
|
|
# configuration components; this ensures that for sysv4, unix/common
|
|
# (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
|
|
# after sysv4).
|
|
sysnames="`echo $implied $* $parent`"
|
|
test -n "$sysnames" && set $sysnames
|
|
done
|
|
|
|
# Add the default directories.
|
|
default_sysnames=sysdeps/generic
|
|
if test "$elf" = yes; then
|
|
default_sysnames="sysdeps/generic/elf $default_sysnames"
|
|
fi
|
|
sysnames="$names $default_sysnames"
|
|
AC_SUBST(sysnames)
|
|
# The other names were emitted during the scan.
|
|
AC_MSG_RESULT($default_sysnames)
|
|
|
|
|
|
### Locate tools.
|
|
|
|
AC_PROG_INSTALL
|
|
if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
|
|
# The makefiles need to use a different form to find it in $srcdir.
|
|
INSTALL='\$(..)./scripts/install-sh -c'
|
|
fi
|
|
AC_PROG_LN_S
|
|
|
|
AC_PROG_CC
|
|
if test $host != $build; then
|
|
AC_CHECK_PROGS(BUILD_CC, gcc cc)
|
|
fi
|
|
AC_SUBST(cross_compiling)
|
|
AC_PROG_CPP
|
|
# We need the C++ compiler only for testing.
|
|
AC_PROG_CXX
|
|
LIBC_PROG_BINUTILS
|
|
AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
|
|
|
|
# Accept binutils 2.13 or newer.
|
|
AC_CHECK_PROG_VER(AS, $AS, --version,
|
|
[GNU assembler.* \([0-9]*\.[0-9.]*\)],
|
|
[2.1[3-9]*], AS=: critic_missing="$critic_missing as")
|
|
AC_CHECK_PROG_VER(LD, $LD, --version,
|
|
[GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
|
|
[2.1[3-9]*], LD=: critic_missing="$critic_missing ld")
|
|
|
|
# We need the physical current working directory. We cannot use the
|
|
# "pwd -P" shell builtin since that's not portable. Instead we try to
|
|
# find a pwd binary. Note that assigning to the PWD environment
|
|
# variable might have some interesting side effects, so we don't do
|
|
# that.
|
|
AC_PATH_PROG(PWD_P, pwd, no)
|
|
if test "$PWD_P" = no; then
|
|
AC_MSG_ERROR(*** A pwd binary could not be found.)
|
|
fi
|
|
|
|
# These programs are version sensitive.
|
|
AC_CHECK_TOOL_PREFIX
|
|
AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
|
|
[version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]*],
|
|
critic_missing="$critic_missing gcc")
|
|
AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
|
|
[GNU Make[^0-9]*\([0-9][0-9.]*\)],
|
|
[3.79* | 3.[89]*], critic_missing="$critic_missing make")
|
|
|
|
AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
|
|
[GNU gettext.* \([0-9]*\.[0-9.]*\)],
|
|
[0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
|
|
MSGFMT=: aux_missing="$aux_missing msgfmt")
|
|
AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
|
|
[GNU texinfo.* \([0-9][0-9.]*\)],
|
|
[4.*],
|
|
MAKEINFO=: aux_missing="$aux_missing makeinfo")
|
|
AC_CHECK_PROG_VER(SED, sed, --version,
|
|
[GNU sed version \([0-9]*\.[0-9.]*\)],
|
|
[3.0[2-9]*|3.[1-9]*|[4-9]*],
|
|
SED=: aux_missing="$aux_missing sed")
|
|
|
|
AC_CHECK_PROGS(AUTOCONF, autoconf, no)
|
|
case "x$AUTOCONF" in
|
|
xno|x|x:) AUTOCONF=no ;;
|
|
*)
|
|
AC_CACHE_CHECK(dnl
|
|
whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
|
|
if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
|
|
libc_cv_autoconf_works=yes
|
|
else
|
|
libc_cv_autoconf_works=no
|
|
fi])
|
|
test $libc_cv_autoconf_works = yes || AUTOCONF=no
|
|
;;
|
|
esac
|
|
if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then
|
|
# If --without-cvs they probably won't change configure.in, so no complaints.
|
|
aux_missing="$aux_missing autoconf"
|
|
fi
|
|
|
|
test -n "$critic_missing" && AC_MSG_ERROR([
|
|
*** These critical programs are missing or too old:$critic_missing
|
|
*** Check the INSTALL file for required versions.])
|
|
|
|
test -n "$aux_missing" && AC_MSG_WARN([
|
|
*** These auxiliary programs are missing or incompatible versions:$aux_missing
|
|
*** some features will be disabled.
|
|
*** Check the INSTALL file for required versions.])
|
|
|
|
# if using special system headers, find out the compiler's sekrit
|
|
# header directory and add that to the list. NOTE: Only does the right
|
|
# thing on a system that doesn't need fixincludes. (Not presently a problem.)
|
|
if test -n "$sysheaders"; then
|
|
ccheaders=`$CC -print-file-name=include`
|
|
SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
|
|
fi
|
|
AC_SUBST(SYSINCLUDES)
|
|
|
|
# check if ranlib is necessary
|
|
AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
|
|
cat > conftest.c <<EOF
|
|
int a;
|
|
char b;
|
|
void c(void) {}
|
|
EOF
|
|
$CC $CFLAGS $CPPFLAGS -c conftest.c
|
|
$AR cr conftest.a conftest.o
|
|
cp conftest.a conftest2.a
|
|
$RANLIB conftest.a
|
|
if cmp -s conftest.a conftest2.a; then
|
|
libc_cv_ranlib_necessary=no
|
|
else
|
|
libc_cv_ranlib_necessary=yes
|
|
fi
|
|
rm -rf conftest*])
|
|
if test "$libc_cv_ranlib_necessary" = no; then
|
|
RANLIB=:
|
|
fi
|
|
|
|
# Test if LD_LIBRARY_PATH contains the notation for the current directory
|
|
# since this would lead to problems installing/building glibc.
|
|
# LD_LIBRARY_PATH contains the current directory if one of the following
|
|
# is true:
|
|
# - one of the terminals (":" and ";") is the first or last sign
|
|
# - two terminals occur directly after each other
|
|
# - the path contains an element with a dot in it
|
|
AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
|
|
changequote(,)dnl
|
|
case ${LD_LIBRARY_PATH} in
|
|
[:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
|
|
ld_library_path_setting="contains current directory"
|
|
;;
|
|
*)
|
|
ld_library_path_setting="ok"
|
|
;;
|
|
esac
|
|
changequote([,])dnl
|
|
AC_MSG_RESULT($ld_library_path_setting)
|
|
if test "$ld_library_path_setting" != "ok"; then
|
|
AC_MSG_ERROR([
|
|
*** LD_LIBRARY_PATH shouldn't contain the current directory when
|
|
*** building glibc. Please change the environment variable
|
|
*** and run configure again.])
|
|
fi
|
|
|
|
AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl
|
|
if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
|
|
libc_cv_gcc_static_libgcc=
|
|
else
|
|
libc_cv_gcc_static_libgcc=-static-libgcc
|
|
fi])
|
|
AC_SUBST(libc_cv_gcc_static_libgcc)
|
|
|
|
AC_PATH_PROG(BASH, bash, no)
|
|
if test "$BASH" != no &&
|
|
$BASH -c 'test "$BASH_VERSINFO" \
|
|
&& test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
|
|
libc_cv_have_bash2=yes
|
|
else
|
|
libc_cv_have_bash2=no
|
|
fi
|
|
AC_SUBST(libc_cv_have_bash2)
|
|
|
|
dnl We need a ksh compatible shell for tzselect.
|
|
if test "$BASH" = no; then
|
|
AC_PATH_PROG(KSH, ksh, no)
|
|
if test "$KSH" = no; then
|
|
libc_cv_have_ksh=no
|
|
else
|
|
libc_cv_have_ksh=yes
|
|
fi
|
|
else
|
|
KSH="$BASH"
|
|
AC_SUBST(KSH)
|
|
libc_cv_have_ksh=yes
|
|
fi
|
|
AC_SUBST(libc_cv_have_ksh)
|
|
|
|
AC_PROG_AWK
|
|
AC_PATH_PROG(PERL, perl, no)
|
|
if test "$PERL" != no &&
|
|
(eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
|
|
PERL=no
|
|
fi
|
|
AC_PATH_PROG(INSTALL_INFO, install-info, no,
|
|
$PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
|
|
AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin)
|
|
|
|
AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
|
|
echo '#include <stddef.h>
|
|
FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
|
|
if eval "$ac_cpp conftest.c 2>/dev/null" \
|
|
| grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
|
|
libc_cv_signed_size_t=no
|
|
else
|
|
libc_cv_signed_size_t=yes
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_signed_size_t = yes; then
|
|
dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
|
|
cat >> confdefs.h <<\EOF
|
|
#undef __SIZE_TYPE__
|
|
#define __SIZE_TYPE__ unsigned
|
|
EOF
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
|
|
AC_TRY_COMPILE(dnl
|
|
[#define __need_size_t
|
|
#define __need_wchar_t
|
|
#include <stddef.h>
|
|
#define __need_NULL
|
|
#include <stddef.h>], [size_t size; wchar_t wchar;
|
|
#ifdef offsetof
|
|
#error stddef.h ignored __need_*
|
|
#endif
|
|
if (&size == NULL || &wchar == NULL) abort ();],
|
|
libc_cv_friendly_stddef=yes,
|
|
libc_cv_friendly_stddef=no)])
|
|
if test $libc_cv_friendly_stddef = yes; then
|
|
config_vars="$config_vars
|
|
override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
|
|
fi
|
|
|
|
AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
|
|
libc_cv_need_minus_P, [dnl
|
|
cat > conftest.S <<EOF
|
|
#include "confdefs.h"
|
|
/* Nothing whatsoever. */
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_need_minus_P=no
|
|
else
|
|
libc_cv_need_minus_P=yes
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_need_minus_P = yes; then
|
|
config_vars="$config_vars
|
|
asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
|
|
fi
|
|
|
|
AC_MSG_CHECKING(whether .text pseudo-op must be used)
|
|
AC_CACHE_VAL(libc_cv_dot_text, [dnl
|
|
cat > conftest.s <<EOF
|
|
.text
|
|
EOF
|
|
libc_cv_dot_text=
|
|
if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_dot_text=.text
|
|
fi
|
|
rm -f conftest*])
|
|
if test -z "$libc_cv_dot_text"; then
|
|
AC_MSG_RESULT(no)
|
|
else
|
|
AC_MSG_RESULT(yes)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for assembler global-symbol directive,
|
|
libc_cv_asm_global_directive, [dnl
|
|
libc_cv_asm_global_directive=UNKNOWN
|
|
for ac_globl in .globl .global .EXPORT; do
|
|
cat > conftest.s <<EOF
|
|
${libc_cv_dot_text}
|
|
${ac_globl} foo
|
|
foo:
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_global_directive=${ac_globl}
|
|
fi
|
|
rm -f conftest*
|
|
test $libc_cv_asm_global_directive != UNKNOWN && break
|
|
done])
|
|
if test $libc_cv_asm_global_directive = UNKNOWN; then
|
|
AC_MSG_ERROR(cannot determine asm global directive)
|
|
else
|
|
AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
|
|
cat > conftest.s <<EOF
|
|
${libc_cv_dot_text}
|
|
foo:
|
|
.set glibc_conftest_frobozz,foo
|
|
$libc_cv_asm_global_directive glibc_conftest_frobozz
|
|
EOF
|
|
# The alpha-dec-osf1 assembler gives only a warning for `.set'
|
|
# (but it doesn't work), so we must do a linking check to be sure.
|
|
cat > conftest1.c <<\EOF
|
|
extern int glibc_conftest_frobozz;
|
|
void _start() { glibc_conftest_frobozz = 1; }
|
|
EOF
|
|
if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
|
|
-nostartfiles -nostdlib \
|
|
-o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
|
|
libc_cv_asm_set_directive=yes
|
|
else
|
|
libc_cv_asm_set_directive=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_asm_set_directive = yes; then
|
|
AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for assembler .type directive prefix,
|
|
libc_cv_asm_type_prefix, [dnl
|
|
libc_cv_asm_type_prefix=no
|
|
for ac_try_prefix in '@' '%' '#'; do
|
|
cat > conftest.s <<EOF
|
|
${libc_cv_dot_text}
|
|
${libc_cv_asm_global_directive} foo
|
|
.type foo, ${ac_try_prefix}object
|
|
.size foo, 1
|
|
foo:
|
|
.byte 1
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_type_prefix=${ac_try_prefix}
|
|
fi
|
|
rm -f conftest*
|
|
test "x$libc_cv_asm_type_prefix" != xno && break
|
|
done])
|
|
if test "x$libc_cv_asm_type_prefix" != xno; then
|
|
AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
|
|
fi
|
|
|
|
# The Aix ld uses global .symbol_names instead of symbol_names.
|
|
# Unfortunately also used in the PPC64 ELF ABI.
|
|
case "${os}${machine}" in
|
|
aix4.3* | linux*powerpc/powerpc64*)
|
|
AC_DEFINE(HAVE_ASM_GLOBAL_DOT_NAME)
|
|
esac
|
|
|
|
AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
|
|
[cat > conftest.s <<EOF
|
|
${libc_cv_dot_text}
|
|
_sym:
|
|
.symver _sym,sym@VERS
|
|
EOF
|
|
if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
|
|
libc_cv_asm_symver_directive=yes
|
|
else
|
|
libc_cv_asm_symver_directive=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
|
|
if test $libc_cv_asm_symver_directive = yes; then
|
|
cat > conftest.s <<EOF
|
|
${libc_cv_dot_text}
|
|
_sym:
|
|
.symver _sym,sym@VERS
|
|
EOF
|
|
cat > conftest.map <<EOF
|
|
VERS_1 {
|
|
global: sym;
|
|
};
|
|
|
|
VERS_2 {
|
|
global: sym;
|
|
} VERS_1;
|
|
EOF
|
|
if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared
|
|
-o conftest.so conftest.o
|
|
-nostartfiles -nostdlib
|
|
-Wl,--version-script,conftest.map
|
|
1>&AS_MESSAGE_LOG_FD]);
|
|
then
|
|
libc_cv_ld_version_script_option=yes
|
|
else
|
|
libc_cv_ld_version_script_option=no
|
|
fi
|
|
else
|
|
libc_cv_ld_version_script_option=no
|
|
fi
|
|
else
|
|
libc_cv_ld_version_script_option=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $shared != no &&
|
|
test $libc_cv_asm_symver_directive = yes &&
|
|
test $libc_cv_ld_version_script_option = yes &&
|
|
test $enable_versioning = yes; then
|
|
VERSIONING=yes
|
|
AC_DEFINE(DO_VERSIONING)
|
|
else
|
|
VERSIONING=no
|
|
fi
|
|
AC_SUBST(VERSIONING)
|
|
|
|
if test $elf = yes && test $shared != no && test $VERSIONING = no; then
|
|
echo "\
|
|
*** WARNING: You should not compile GNU libc without versioning. Not using
|
|
*** versioning will introduce incompatibilities so that old binaries
|
|
*** will not run anymore.
|
|
*** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
|
|
fi
|
|
if test $elf = yes; then
|
|
AC_CACHE_CHECK(for .previous assembler directive,
|
|
libc_cv_asm_previous_directive, [dnl
|
|
cat > conftest.s <<EOF
|
|
.section foo_section
|
|
.previous
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_previous_directive=yes
|
|
else
|
|
libc_cv_asm_previous_directive=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_asm_previous_directive = yes; then
|
|
AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
|
|
else
|
|
AC_CACHE_CHECK(for .popsection assembler directive,
|
|
libc_cv_asm_popsection_directive, [dnl
|
|
cat > conftest.s <<EOF
|
|
.pushsection foo_section
|
|
.popsection
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_popsection_directive=yes
|
|
else
|
|
libc_cv_asm_popsection_directive=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_asm_popsection_directive = yes; then
|
|
AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
|
|
fi
|
|
fi
|
|
AC_CACHE_CHECK(for .protected and .hidden assembler directive,
|
|
libc_cv_asm_protected_directive, [dnl
|
|
cat > conftest.s <<EOF
|
|
.protected foo
|
|
foo:
|
|
.hidden bar
|
|
bar:
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_protected_directive=yes
|
|
else
|
|
libc_cv_asm_protected_directive=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_asm_protected_directive)
|
|
AC_DEFINE(HAVE_PROTECTED)
|
|
AC_DEFINE(HAVE_HIDDEN)
|
|
|
|
if test $libc_cv_asm_protected_directive = yes; then
|
|
AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
|
|
libc_cv_visibility_attribute,
|
|
[cat > conftest.c <<EOF
|
|
int foo __attribute__ ((visibility ("hidden"))) = 1;
|
|
int bar __attribute__ ((visibility ("protected"))) = 1;
|
|
EOF
|
|
libc_cv_visibility_attribute=no
|
|
if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
if grep '\.hidden.*foo' conftest.s >/dev/null; then
|
|
if grep '\.protected.*bar' conftest.s >/dev/null; then
|
|
libc_cv_visibility_attribute=yes
|
|
fi
|
|
fi
|
|
fi
|
|
rm -f conftest.[cs]
|
|
])
|
|
if test $libc_cv_visibility_attribute = yes; then
|
|
AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
|
|
fi
|
|
fi
|
|
|
|
if test $libc_cv_visibility_attribute = yes; then
|
|
AC_CACHE_CHECK(for broken __attribute__((visibility())),
|
|
libc_cv_broken_visibility_attribute,
|
|
[cat > conftest.c <<EOF
|
|
int foo (int x);
|
|
int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden")));
|
|
int bar (int x) { return x; }
|
|
EOF
|
|
libc_cv_broken_visibility_attribute=yes
|
|
if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s1>&AS_MESSAGE_LOG_FD); then
|
|
changequote(,)dnl
|
|
if grep '\.hidden[ _]foo' conftest.s >/dev/null; then
|
|
changequote([,])dnl
|
|
libc_cv_broken_visibility_attribute=no
|
|
fi
|
|
fi
|
|
rm -f conftest.c conftest.s
|
|
])
|
|
if test $libc_cv_broken_visibility_attribute = yes; then
|
|
AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE)
|
|
fi
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for broken __attribute__((alias())),
|
|
libc_cv_broken_alias_attribute,
|
|
[cat > conftest.c <<EOF
|
|
extern int foo (int x) __asm ("xyzzy");
|
|
int bar (int x) { return x; }
|
|
extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
|
|
extern int dfoo;
|
|
extern __typeof (dfoo) dfoo __asm ("abccb");
|
|
int dfoo = 1;
|
|
EOF
|
|
libc_cv_broken_alias_attribute=yes
|
|
if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
if grep 'xyzzy' conftest.s >/dev/null &&
|
|
grep 'abccb' conftest.s >/dev/null; then
|
|
libc_cv_broken_alias_attribute=no
|
|
fi
|
|
fi
|
|
rm -f conftest.c conftest.s
|
|
])
|
|
if test $libc_cv_broken_alias_attribute = yes; then
|
|
AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE)
|
|
fi
|
|
|
|
if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then
|
|
AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
|
|
libc_cv_have_sdata_section,
|
|
[echo "int i;" > conftest.c
|
|
libc_cv_have_sdata_section=no
|
|
if ${CC-cc} $LDFLAGS -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
|
|
| grep '\.sdata' >/dev/null; then
|
|
libc_cv_have_sdata_section=yes
|
|
fi
|
|
rm -f conftest.c conftest.so
|
|
])
|
|
if test $libc_cv_have_sdata_section = yes; then
|
|
AC_DEFINE(HAVE_SDATA_SECTION)
|
|
fi
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
|
|
libc_cv_initfinit_array, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 0; }
|
|
int __start (void) { return 0; }
|
|
int foo (void) { return 1; }
|
|
int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
|
|
-static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
|
|
libc_cv_initfinit_array=yes
|
|
else
|
|
libc_cv_initfinit_array=no
|
|
fi
|
|
else
|
|
libc_cv_initfinit_array=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_initfinit_array)
|
|
if test $libc_cv_initfinit_array = yes; then
|
|
AC_DEFINE(HAVE_INITFINI_ARRAY)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for libunwind-support in compiler,
|
|
libc_cv_cc_with_libunwind, [dnl
|
|
AC_TRY_LINK([#include <libunwind.h>], [
|
|
unw_context_t uc;
|
|
unw_cursor_t c;
|
|
unw_getcontext (&uc);
|
|
unw_init_local (&c, &uc)],
|
|
libc_cv_cc_with_libunwind=yes, libc_cv_cc_with_libunwind=no)])
|
|
AC_SUBST(libc_cv_cc_with_libunwind)
|
|
if test $libc_cv_cc_with_libunwind = yes; then
|
|
AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for -z nodelete option,
|
|
libc_cv_z_nodelete, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 42; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-shared -o conftest.so conftest.c
|
|
-nostartfiles -nostdlib
|
|
-Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_z_nodelete=yes
|
|
else
|
|
libc_cv_z_nodelete=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_z_nodelete)
|
|
|
|
AC_CACHE_CHECK(for -z nodlopen option,
|
|
libc_cv_z_nodlopen, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 42; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-shared -o conftest.so conftest.c
|
|
-nostartfiles -nostdlib
|
|
-Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_z_nodlopen=yes
|
|
else
|
|
libc_cv_z_nodlopen=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_z_nodlopen)
|
|
|
|
AC_CACHE_CHECK(for -z initfirst option,
|
|
libc_cv_z_initfirst, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 42; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-shared -o conftest.so conftest.c
|
|
-nostartfiles -nostdlib
|
|
-Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_z_initfirst=yes
|
|
else
|
|
libc_cv_z_initfirst=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_z_initfirst)
|
|
|
|
AC_CACHE_CHECK(for -z relro option,
|
|
libc_cv_z_relro, [dnl
|
|
if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_z_relro=yes
|
|
else
|
|
libc_cv_z_relro=no
|
|
fi])
|
|
AC_SUBST(libc_cv_z_relro)
|
|
if test $libc_cv_z_relro = yes; then
|
|
AC_DEFINE(HAVE_Z_RELRO)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for -Bgroup option,
|
|
libc_cv_Bgroup, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 42; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-shared -o conftest.so conftest.c
|
|
-Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_Bgroup=yes
|
|
else
|
|
libc_cv_Bgroup=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_Bgroup)
|
|
|
|
ASFLAGS_config=
|
|
AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
|
|
libc_cv_as_noexecstack, [dnl
|
|
cat > conftest.c <<EOF
|
|
void foo (void) { }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
|
|
-S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
|
|
&& grep -q .note.GNU-stack conftest.s \
|
|
&& AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wa,--noexecstack
|
|
-c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_as_noexecstack=yes
|
|
else
|
|
libc_cv_as_noexecstack=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_as_noexecstack = yes; then
|
|
ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
|
|
fi
|
|
AC_SUBST(ASFLAGS_config)
|
|
|
|
AC_CACHE_CHECK(for -z combreloc,
|
|
libc_cv_z_combreloc, [dnl
|
|
cat > conftest.c <<EOF
|
|
extern int bar (int);
|
|
extern int mumble;
|
|
int foo (void) { return bar (mumble); }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-shared -o conftest.so conftest.c
|
|
-nostdlib -nostartfiles
|
|
-Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
dnl The following test is a bit weak. We must use a tool which can test
|
|
dnl cross-platform since the gcc used can be a cross compiler. Without
|
|
dnl introducing new options this is not easily doable. Instead use a tool
|
|
dnl which always is cross-platform: readelf. To detect whether -z combreloc
|
|
dnl look for a section named .rel.dyn.
|
|
if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
|
|
libc_cv_z_combreloc=yes
|
|
else
|
|
libc_cv_z_combreloc=no
|
|
fi
|
|
else
|
|
libc_cv_z_combreloc=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test "$libc_cv_z_combreloc" = yes; then
|
|
AC_DEFINE(HAVE_Z_COMBRELOC)
|
|
fi
|
|
AC_SUBST(libc_cv_z_combreloc)
|
|
|
|
AC_CACHE_CHECK(for -z execstack,
|
|
libc_cv_z_execstack, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 42; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-shared -o conftest.so conftest.c
|
|
-Wl,-z,execstack -nostdlib
|
|
1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_z_execstack=yes
|
|
else
|
|
libc_cv_z_execstack=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_z_execstack)
|
|
|
|
AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
|
|
cat > conftest.c <<EOF
|
|
int foo;
|
|
main () { return 0;}
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
|
|
-o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_fpie=yes
|
|
else
|
|
libc_cv_fpie=no
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
AC_SUBST(libc_cv_fpie)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for -fno-unit-at-a-time, libc_cv_fno_unit_at_a_time, [dnl
|
|
cat > conftest.c <<EOF
|
|
int foo;
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-unit-at-a-time
|
|
conftest.c 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_fno_unit_at_a_time=yes
|
|
else
|
|
libc_cv_fno_unit_at_a_time=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_fno_unit_at_a_time = yes; then
|
|
fno_unit_at_a_time=-fno-unit-at-a-time
|
|
fi
|
|
AC_SUBST(fno_unit_at_a_time)
|
|
|
|
if test $elf != yes; then
|
|
AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
|
|
[AC_TRY_COMPILE(, [asm (".section .init");
|
|
asm (".section .fini");
|
|
asm ("${libc_cv_dot_text}");],
|
|
libc_cv_have_initfini=yes,
|
|
libc_cv_have_initfini=no)])
|
|
AC_SUBST(libc_cv_have_initfini)dnl
|
|
if test $libc_cv_have_initfini = yes; then
|
|
AC_DEFINE(HAVE_INITFINI)
|
|
fi
|
|
fi
|
|
|
|
if test $elf = yes -a $gnu_ld = yes; then
|
|
AC_CACHE_CHECK(whether cc puts quotes around section names,
|
|
libc_cv_have_section_quotes,
|
|
[cat > conftest.c <<EOF
|
|
static const int foo
|
|
__attribute__ ((section ("bar"))) = 1;
|
|
EOF
|
|
if ${CC-cc} -S conftest.c -o conftest.s; then
|
|
if grep '\.section.*"bar"' conftest.s >/dev/null; then
|
|
libc_cv_have_section_quotes=yes
|
|
else
|
|
libc_cv_have_section_quotes=no
|
|
fi
|
|
else
|
|
libc_cv_have_section_quotes=unknown
|
|
fi
|
|
rm -f conftest.[cs]
|
|
])
|
|
if test $libc_cv_have_section_quotes = yes; then
|
|
AC_DEFINE(HAVE_SECTION_QUOTES)
|
|
fi
|
|
fi
|
|
|
|
dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
|
|
AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
|
|
[cat > conftest.$ac_ext <<EOF
|
|
dnl This sometimes fails to find confdefs.h, for some reason.
|
|
dnl [#]line $LINENO "[$]0"
|
|
[#]line $LINENO "configure"
|
|
#include "confdefs.h"
|
|
void underscore_test(void) {
|
|
return; }
|
|
EOF
|
|
if AC_TRY_EVAL(ac_compile); then
|
|
if grep _underscore_test conftest* >/dev/null; then
|
|
ifelse([$1], , :, [rm -f conftest*
|
|
$1])
|
|
else
|
|
ifelse([$2], , , [rm -f conftest*
|
|
$2])
|
|
fi
|
|
else
|
|
echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
|
|
cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
|
|
ifelse([$2], , , [rm -f conftest*
|
|
$2])
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
if test $elf = yes; then
|
|
libc_cv_asm_underscores=no
|
|
else
|
|
if test $ac_cv_prog_cc_works = yes; then
|
|
AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
|
|
[AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
|
|
libc_cv_asm_underscores=yes,
|
|
libc_cv_asm_underscores=no)])
|
|
else
|
|
AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
|
|
[AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
|
|
libc_cv_asm_underscores=no)])
|
|
fi
|
|
fi
|
|
if test $libc_cv_asm_underscores = no; then
|
|
AC_DEFINE(NO_UNDERSCORES)
|
|
fi
|
|
|
|
if test $elf = yes; then
|
|
libc_cv_weak_symbols=yes
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
|
|
[dnl
|
|
cat > conftest.s <<EOF
|
|
${libc_cv_dot_text}
|
|
${libc_cv_asm_global_directive} foo
|
|
foo:
|
|
.weak foo
|
|
.weak bar; bar = foo
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_weak_directive=yes
|
|
else
|
|
libc_cv_asm_weak_directive=no
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
if test $libc_cv_asm_weak_directive = no; then
|
|
AC_CACHE_CHECK(for assembler .weakext directive,
|
|
libc_cv_asm_weakext_directive,
|
|
[dnl
|
|
cat > conftest.s <<EOF
|
|
${libc_cv_dot_text}
|
|
${libc_cv_asm_global_directive} foo
|
|
foo:
|
|
.weakext bar foo
|
|
.weakext baz
|
|
${libc_cv_asm_global_directive} baz
|
|
baz:
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_weakext_directive=yes
|
|
else
|
|
libc_cv_asm_weakext_directive=no
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
fi # no .weak
|
|
|
|
if test $libc_cv_asm_weak_directive = yes; then
|
|
AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
|
|
elif test $libc_cv_asm_weakext_directive = yes; then
|
|
AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
|
|
fi
|
|
|
|
dnl The standard hppa assembler uses `;' to start comments and `!'
|
|
dnl as a line separator. CRIS uses `;' to start comments and `@' for
|
|
dnl line separator.
|
|
case "${host_cpu}-${host_os}" in
|
|
cris*)
|
|
libc_cv_asm_line_sep='@'
|
|
AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
|
|
;;
|
|
hppa*linux*)
|
|
AC_CACHE_CHECK(for assembler line separator,
|
|
libc_cv_asm_line_sep, [dnl
|
|
cat > conftest.s <<EOF
|
|
nop ; is_old_puffin
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_line_sep='!'
|
|
else
|
|
if test -z "$enable_hacker_mode"; then
|
|
echo "*** You need a newer assembler to compile glibc"
|
|
rm -f conftest*
|
|
exit 1
|
|
fi
|
|
libc_cv_asm_line_sep=';'
|
|
fi
|
|
rm -f conftest*])
|
|
AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep)
|
|
;;
|
|
esac
|
|
|
|
AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
|
|
cat > conftest.s <<EOF
|
|
.text
|
|
.type func,@function
|
|
func:
|
|
.cfi_startproc
|
|
.cfi_remember_state
|
|
.cfi_rel_offset 1, 0
|
|
.cfi_endproc
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
libc_cv_asm_cfi_directives=yes
|
|
else
|
|
libc_cv_asm_cfi_directives=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_asm_cfi_directives = yes; then
|
|
AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
|
|
libc_cv_cpp_asm_debuginfo, [dnl
|
|
cat > conftest.S <<EOF
|
|
#include "confdefs.h"
|
|
|
|
/* comment on
|
|
two lines */
|
|
${libc_cv_dot_text}
|
|
${libc_cv_asm_global_directive} foo
|
|
foo:
|
|
/* Unfortunately this test only works for a real instruction,
|
|
not for any of the machine-independent pseudo-ops.
|
|
So we just have to assume everybody has a "nop". */
|
|
nop
|
|
/* comment */
|
|
nop
|
|
/* comment */
|
|
nop
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) &&
|
|
ac_pattern='conftest\.S'
|
|
AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
|
|
grep $ac_pattern 1>&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_cpp_asm_debuginfo=yes
|
|
else
|
|
libc_cv_cpp_asm_debuginfo=no
|
|
fi
|
|
rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
|
|
if test $libc_cv_cpp_asm_debuginfo = yes; then
|
|
AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
|
|
cat > conftest.c <<\EOF
|
|
_start () {}
|
|
int __eh_pc;
|
|
__throw () {}
|
|
EOF
|
|
dnl No \ in command here because it ends up inside ''.
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-nostdlib -nostartfiles -Wl,--no-whole-archive
|
|
-o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_ld_no_whole_archive=yes
|
|
else
|
|
libc_cv_ld_no_whole_archive=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_ld_no_whole_archive = yes; then
|
|
no_whole_archive=-Wl,--no-whole-archive
|
|
fi
|
|
AC_SUBST(no_whole_archive)dnl
|
|
|
|
AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
|
|
cat > conftest.c <<\EOF
|
|
_start () {}
|
|
int __eh_pc;
|
|
__throw () {}
|
|
EOF
|
|
dnl No \ in command here because it ends up inside ''.
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-nostdlib -nostartfiles -fexceptions
|
|
-o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_gcc_exceptions=yes
|
|
else
|
|
libc_cv_gcc_exceptions=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_gcc_exceptions = yes; then
|
|
exceptions=-fexceptions
|
|
fi
|
|
AC_SUBST(exceptions)dnl
|
|
|
|
if test "$host_cpu" = powerpc ; then
|
|
# Check for a bug present in at least versions 2.8.x of GCC
|
|
# and versions 1.0.x of EGCS.
|
|
AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
|
|
AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
|
|
libc_cv_c_asmcr0_bug='no',
|
|
libc_cv_c_asmcr0_bug='yes')])
|
|
if test "$libc_cv_c_asmcr0_bug" != 'no'; then
|
|
AC_DEFINE(BROKEN_PPC_ASM_CR0)
|
|
fi
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
|
|
[cat > conftest.c <<EOF
|
|
#line $LINENO "configure"
|
|
static char *__EH_FRAME_BEGIN__;
|
|
_start ()
|
|
{
|
|
#ifdef CHECK__register_frame
|
|
__register_frame (__EH_FRAME_BEGIN__);
|
|
__deregister_frame (__EH_FRAME_BEGIN__);
|
|
#endif
|
|
#ifdef CHECK__register_frame_info
|
|
__register_frame_info (__EH_FRAME_BEGIN__);
|
|
__deregister_frame_info (__EH_FRAME_BEGIN__);
|
|
#endif
|
|
}
|
|
int __eh_pc;
|
|
__throw () {}
|
|
/* FIXME: this is fragile. */
|
|
malloc () {}
|
|
strcmp () {}
|
|
strlen () {}
|
|
memcpy () {}
|
|
memset () {}
|
|
free () {}
|
|
abort () {}
|
|
__bzero () {}
|
|
dl_iterate_phdr () {}
|
|
EOF
|
|
libc_unwind_check="${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame_info \
|
|
$LDFLAGS \
|
|
-nostdlib -nostartfiles -o conftest conftest.c \
|
|
-lgcc"
|
|
# Some platforms' specs put -lgcc first. The second one doesn't hurt.
|
|
if AC_TRY_COMMAND([$libc_unwind_check >&AS_MESSAGE_LOG_FD]) ||
|
|
AC_TRY_COMMAND([$libc_unwind_check -lgcc_eh -lgcc >&AS_MESSAGE_LOG_FD])
|
|
then
|
|
if $libc_unwind_check -v 2>&1 >/dev/null \
|
|
| grep -- --eh-frame-hdr 2>&1 >/dev/null; then
|
|
libc_cv_gcc_dwarf2_unwind_info=no_registry_needed
|
|
else
|
|
libc_cv_gcc_dwarf2_unwind_info=static
|
|
fi
|
|
else
|
|
libc_cv_gcc_dwarf2_unwind_info=no
|
|
fi
|
|
if test $libc_cv_gcc_dwarf2_unwind_info = no; then
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame
|
|
$LDFLAGS -nostdlib -nostartfiles
|
|
-o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_gcc_dwarf2_unwind_info=yes
|
|
else
|
|
libc_cv_gcc_dwarf2_unwind_info=no
|
|
fi
|
|
fi
|
|
rm -f conftest*])
|
|
case $libc_cv_gcc_dwarf2_unwind_info in
|
|
yes)
|
|
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
|
|
;;
|
|
static)
|
|
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
|
|
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
|
|
;;
|
|
esac
|
|
|
|
dnl Check whether compiler understands __builtin_expect.
|
|
AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
|
|
[cat > conftest.c <<EOF
|
|
#line $LINENO "configure"
|
|
int foo (int a)
|
|
{
|
|
a = __builtin_expect (a, 10);
|
|
return a == 10 ? 0 : 1;
|
|
}
|
|
EOF
|
|
dnl No \ in command here because it ends up inside ''.
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
|
|
-o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_gcc_builtin_expect=yes
|
|
else
|
|
libc_cv_gcc_builtin_expect=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test "$libc_cv_gcc_builtin_expect" = yes; then
|
|
AC_DEFINE(HAVE_BUILTIN_EXPECT)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
|
|
cat > conftest.c <<\EOF
|
|
void zero (void *x)
|
|
{
|
|
__builtin_memset (x, 0, 1000);
|
|
}
|
|
EOF
|
|
dnl
|
|
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
|
|
then
|
|
libc_cv_gcc_builtin_memset=no
|
|
else
|
|
libc_cv_gcc_builtin_memset=yes
|
|
fi
|
|
rm -f conftest* ])
|
|
if test "$libc_cv_gcc_builtin_memset" = yes ; then
|
|
AC_DEFINE(HAVE_BUILTIN_MEMSET)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
|
|
cat > conftest.c <<\EOF
|
|
extern char *strstr (const char *, const char *) __asm ("my_strstr");
|
|
char *foo (const char *a, const char *b)
|
|
{
|
|
return __builtin_strstr (a, b);
|
|
}
|
|
EOF
|
|
dnl
|
|
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
|
|
then
|
|
libc_cv_gcc_builtin_redirection=yes
|
|
else
|
|
libc_cv_gcc_builtin_redirection=no
|
|
fi
|
|
rm -f conftest* ])
|
|
if test "$libc_cv_gcc_builtin_redirection" = yes ; then
|
|
AC_DEFINE(HAVE_BUILTIN_REDIRECTION)
|
|
fi
|
|
|
|
dnl Check whether the compiler supports subtraction of local labels.
|
|
AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
|
|
[cat > conftest.c <<EOF
|
|
changequote(,)dnl
|
|
#line $LINENO "configure"
|
|
int foo (int a)
|
|
{
|
|
static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
|
|
void *p = &&l1 + ar[a];
|
|
goto *p;
|
|
l1:
|
|
return 1;
|
|
l2:
|
|
return 2;
|
|
}
|
|
changequote([,])dnl
|
|
EOF
|
|
dnl No \ in command here because it ends up inside ''.
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
|
|
-o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_gcc_subtract_local_labels=yes
|
|
else
|
|
libc_cv_gcc_subtract_local_labels=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test "$libc_cv_gcc_subtract_local_labels" = yes; then
|
|
AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
|
|
fi
|
|
|
|
dnl Check whether the compiler supports the __thread keyword.
|
|
if test "x$use__thread" != xno; then
|
|
AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
|
|
[cat > conftest.c <<\EOF
|
|
__thread int a = 42;
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_gcc___thread=yes
|
|
else
|
|
libc_cv_gcc___thread=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test "$libc_cv_gcc___thread" = yes; then
|
|
AC_DEFINE(HAVE___THREAD)
|
|
fi
|
|
else
|
|
libc_cv_gcc___thread=no
|
|
fi
|
|
|
|
if test "$libc_cv_gcc___thread" = yes; then
|
|
dnl Check whether the compiler supports the tls_model attribute.
|
|
AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
|
|
cat > conftest.c <<\EOF
|
|
extern __thread int a __attribute__((tls_model ("initial-exec")));
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_gcc_tls_model_attr=yes
|
|
else
|
|
libc_cv_gcc_tls_model_attr=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test "$libc_cv_gcc_tls_model_attr" = yes; then
|
|
AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
|
|
fi
|
|
fi
|
|
|
|
dnl Check whether we have the gd library available.
|
|
AC_MSG_CHECKING(for libgd)
|
|
if test "$with_gd" != "no"; then
|
|
old_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $libgd_include"
|
|
old_LDFLAGS="$LDFLAGS"
|
|
LDFLAGS="$LDFLAGS $libgd_ldflags"
|
|
old_LIBS="$LIBS"
|
|
LIBS="$LIBS -lgd -lpng -lz -lm"
|
|
AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
|
|
CFLAGS="$old_CFLAGS"
|
|
LDFLAGS="$old_LDFLAGS"
|
|
LIBS="$old_LIBS"
|
|
else
|
|
LIBGD=no
|
|
fi
|
|
AC_MSG_RESULT($LIBGD)
|
|
AC_SUBST(LIBGD)
|
|
|
|
dnl check for the size of 'long double'.
|
|
AC_CHECK_SIZEOF(long double, 0)
|
|
sizeof_long_double=$ac_cv_sizeof_long_double
|
|
AC_SUBST(sizeof_long_double)
|
|
|
|
### End of automated tests.
|
|
### Now run sysdeps configure fragments.
|
|
|
|
# They also can set these variables.
|
|
use_ldconfig=no
|
|
ldd_rewrite_script=no
|
|
libc_cv_sysconfdir=$sysconfdir
|
|
libc_cv_gcc_unwind_find_fde=no
|
|
|
|
# Iterate over all the sysdep directories we will use, running their
|
|
# configure fragments, and looking for a uname implementation.
|
|
uname=
|
|
for dir in $sysnames; do
|
|
case $dir in
|
|
/*) dest=$dir ;;
|
|
*) dest=$srcdir/$dir ;;
|
|
esac
|
|
if test -r $dest/configure; then
|
|
AC_MSG_RESULT(running configure fragment for $dir)
|
|
. $dest/configure
|
|
fi
|
|
[
|
|
if test -z "$uname"; then
|
|
if test -r $dest/uname.c ||
|
|
test -r $dest/uname.S ||
|
|
{ test -r $dest/syscalls.list &&
|
|
grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
|
|
uname=$dir
|
|
fi
|
|
fi
|
|
]dnl
|
|
done
|
|
|
|
if test x$libc_cv_gcc_unwind_find_fde = xyes; then
|
|
AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
|
|
fi
|
|
AC_SUBST(libc_cv_gcc_unwind_find_fde)
|
|
|
|
# If we will use the generic uname implementation, we must figure out what
|
|
# it will say by examining the system, and write the results in config-name.h.
|
|
if test "$uname" = "sysdeps/generic"; then
|
|
|
|
changequote(,)dnl
|
|
uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
|
|
changequote([,])dnl
|
|
if test $uname_sysname != $config_os; then
|
|
config_release=`echo $config_os | sed s/$uname_sysname//`
|
|
fi
|
|
dnl
|
|
AC_DEFUN(LIBC_KERNEL_ID, [dnl
|
|
if test -r /vmunix; then
|
|
kernel_id=`strings /vmunix | grep UNIX`
|
|
elif test -r /dynix; then
|
|
kernel_id=`strings /dynix | grep DYNIX`
|
|
else
|
|
kernel_id=
|
|
fi
|
|
])dnl
|
|
|
|
AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
|
|
LIBC_KERNEL_ID
|
|
changequote(,)dnl
|
|
kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
|
|
changequote([,])dnl
|
|
if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
|
|
!= x$config_release; then
|
|
# The configuration release is a substring of the kernel release.
|
|
libc_cv_uname_release=$kernel_release
|
|
elif test x$config_release != x; then
|
|
libc_cv_uname_release=$config_release
|
|
elif test x$kernel_release != x; then
|
|
libc_cv_uname_release=$kernel_release
|
|
else
|
|
libc_cv_uname_release=unknown
|
|
fi])
|
|
uname_release="$libc_cv_uname_release"
|
|
|
|
AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
|
|
LIBC_KERNEL_ID
|
|
changequote(,)dnl
|
|
kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
|
|
changequote([,])dnl
|
|
if test -n "$kernel_version"; then
|
|
libc_cv_uname_version="$kernel_version"
|
|
else
|
|
libc_cv_uname_version=unknown
|
|
fi])
|
|
uname_version="$libc_cv_uname_version"
|
|
|
|
AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
|
|
config_uname=config-name.h:config-name.in
|
|
else
|
|
# For non-generic uname, we don't need to create config-name.h at all.
|
|
config_uname=
|
|
fi
|
|
|
|
dnl This is tested by existing code and it's simpler to avoid changing it.
|
|
AC_DEFINE(USE_IN_LIBIO)
|
|
|
|
# Test for old glibc 2.0.x headers so that they can be removed properly
|
|
# Search only in includedir.
|
|
AC_MSG_CHECKING(for old glibc 2.0.x headers)
|
|
if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
|
|
then
|
|
old_glibc_headers=yes
|
|
else
|
|
old_glibc_headers=no
|
|
fi
|
|
AC_MSG_RESULT($old_glibc_headers)
|
|
if test ${old_glibc_headers} = yes; then
|
|
AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
|
|
AC_MSG_WARN(*** be removed.)
|
|
fi
|
|
AC_SUBST(old_glibc_headers)
|
|
|
|
AC_SUBST(libc_cv_slibdir)
|
|
AC_SUBST(libc_cv_localedir)
|
|
AC_SUBST(libc_cv_sysconfdir)
|
|
AC_SUBST(libc_cv_rootsbindir)
|
|
AC_SUBST(libc_cv_forced_unwind)
|
|
|
|
AC_SUBST(use_ldconfig)
|
|
AC_SUBST(ldd_rewrite_script)
|
|
|
|
AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff)
|
|
if test $gnu_ld = yes; then
|
|
AC_DEFINE(HAVE_GNU_LD)
|
|
fi
|
|
if test $gnu_as = yes; then
|
|
AC_DEFINE(HAVE_GNU_AS)
|
|
fi
|
|
if test $elf = yes; then
|
|
AC_DEFINE(HAVE_ELF)
|
|
fi
|
|
if test $xcoff = yes; then
|
|
AC_DEFINE(HAVE_XCOFF)
|
|
fi
|
|
|
|
AC_SUBST(static)
|
|
AC_SUBST(shared)
|
|
if test $shared = default; then
|
|
if test $gnu_ld = yes; then
|
|
shared=$elf
|
|
else
|
|
# For now we do not assume shared libs are available. In future more
|
|
# tests might become available.
|
|
shared=no
|
|
fi
|
|
fi
|
|
|
|
AC_CACHE_CHECK([whether -fPIC is default], pic_default,
|
|
[pic_default=yes
|
|
cat > conftest.c <<EOF
|
|
#if defined __PIC__ || defined __pic__ || defined PIC || defined pic
|
|
# error PIC is default.
|
|
#endif
|
|
EOF
|
|
if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
|
|
pic_default=no
|
|
fi
|
|
rm -f conftest.*])
|
|
AC_SUBST(pic_default)
|
|
|
|
AC_SUBST(profile)
|
|
AC_SUBST(omitfp)
|
|
AC_SUBST(bounded)
|
|
AC_SUBST(static_nss)
|
|
AC_SUBST(nopic_initfini)
|
|
|
|
AC_SUBST(DEFINES)
|
|
|
|
case "$add_ons" in
|
|
*door*) linux_doors=yes ;;
|
|
*) linux_doors=no ;;
|
|
esac
|
|
AC_SUBST(linux_doors)
|
|
|
|
dnl See sysdeps/mach/configure.in for this variable.
|
|
AC_SUBST(mach_interface_list)
|
|
|
|
if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
|
|
config_makefile=
|
|
else
|
|
config_makefile=Makefile
|
|
fi
|
|
|
|
VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
|
|
RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
|
|
AC_SUBST(VERSION)
|
|
AC_SUBST(RELEASE)
|
|
|
|
AC_CONFIG_FILES([config.make ${config_makefile} ${config_uname}])
|
|
AC_CONFIG_COMMANDS([default],[[
|
|
case $CONFIG_FILES in *config.make*)
|
|
echo "$config_vars" >> config.make;;
|
|
esac
|
|
test -d bits || mkdir bits]],[[config_vars='$config_vars']])
|
|
AC_OUTPUT
|