mirror of
https://sourceware.org/git/glibc.git
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77c7c44174
Remove AC_SUBST(libc_cv_mtls_descriptor) since there is no @libc_cv_mtls_descriptor@ and there is LIBC_CONFIG_VAR([have-mtls-descriptor], [$libc_cv_mtls_descriptor]) Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Sam James <sam@gentoo.org>
1868 lines
57 KiB
Plaintext
1868 lines
57 KiB
Plaintext
dnl Process this file with autoconf to produce a configure script.
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dnl Note we do not use AC_PREREQ here! See aclocal.m4 for what we use instead.
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AC_INIT([GNU C Library], [(see version.h)], [https://sourceware.org/bugzilla/],
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[glibc], [https://www.gnu.org/software/glibc/])
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AC_CONFIG_SRCDIR([include/features.h])
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AC_CONFIG_HEADERS([config.h])
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AC_CONFIG_AUX_DIR([scripts])
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ACX_PKGVERSION([GNU libc])
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ACX_BUGURL([https://www.gnu.org/software/libc/bugs.html])
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AC_DEFINE_UNQUOTED([PKGVERSION], ["$PKGVERSION"],
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[Package description])
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AC_DEFINE_UNQUOTED([REPORT_BUGS_TO], ["$REPORT_BUGS_TO"],
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[Bug reporting address])
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# Glibc should not depend on any header files
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AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS],
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[m4_divert_text([DEFAULTS],
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[ac_includes_default='/* none */'])])
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# We require GCC, and by default use its preprocessor. Override AC_PROG_CPP
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# here to work around the Autoconf issue discussed in
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# <https://sourceware.org/ml/libc-alpha/2013-01/msg00721.html>.
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AC_DEFUN([AC_PROG_CPP],
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[AC_REQUIRE([AC_PROG_CC])dnl
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AC_ARG_VAR([CPP], [C preprocessor])dnl
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_AC_ARG_VAR_CPPFLAGS()dnl
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# On Suns, sometimes $CPP names a directory.
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if test -n "$CPP" && test -d "$CPP"; then
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CPP=
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fi
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if test -z "$CPP"; then
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CPP="$CC -E"
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fi
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AC_SUBST(CPP)dnl
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])# AC_PROG_CPP
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# We require GCC. Override _AC_PROG_CC_C89 here to work around the Autoconf
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# issue discussed in
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# <https://sourceware.org/ml/libc-alpha/2013-01/msg00757.html>.
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AC_DEFUN([_AC_PROG_CC_C89], [[$1]])
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dnl This is here so we can set $subdirs directly based on configure fragments.
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AC_CONFIG_SUBDIRS()
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AC_CANONICAL_HOST
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AC_PROG_CC
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if test $host != $build; then
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AC_CHECK_PROGS(BUILD_CC, gcc cc)
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fi
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AC_SUBST(cross_compiling)
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AC_PROG_CPP
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# This will get text that should go into config.make.
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config_vars=
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AC_ARG_ENABLE([static-c++-tests],
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AS_HELP_STRING([--disable-static-c++-tests],
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[disable static C++ tests@<:@default=no@:>@]),
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[static_cxx_tests=$enableval],
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[static_cxx_tests=yes])
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LIBC_CONFIG_VAR([static-cxx-tests], [$static_cxx_tests])
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AC_ARG_ENABLE([static-c++-link-check],
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AS_HELP_STRING([--disable-static-c++-link-check],
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[disable static C++ link check @<:@default=no@:>@]),
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[static_cxx_link_check=$enableval],
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[static_cxx_link_check=yes])
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# We need the C++ compiler only for testing.
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AC_PROG_CXX
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# It's useless to us if it can't link programs (e.g. missing -lstdc++).
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AC_CACHE_CHECK([whether $CXX can link programs], libc_cv_cxx_link_ok, [dnl
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AC_LANG_PUSH([C++])
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# Default, dynamic case.
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AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
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[libc_cv_cxx_link_ok=yes],
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[libc_cv_cxx_link_ok=no])
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if test $static_cxx_link_check$static_cxx_tests = yesyes; then
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# Static case.
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old_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -static"
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AC_LINK_IFELSE([AC_LANG_SOURCE([
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#include <iostream>
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int
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main()
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{
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std::cout << "Hello, world!";
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return 0;
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}
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])],
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[],
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[libc_cv_cxx_link_ok=no])
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LDFLAGS="$old_LDFLAGS"
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fi
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AC_LANG_POP([C++])])
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AS_IF([test $libc_cv_cxx_link_ok != yes], [CXX=])
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if test "`cd $srcdir; pwd -P`" = "`pwd -P`"; then
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AC_MSG_ERROR([you must configure in a separate build directory])
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fi
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# Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
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AC_ARG_WITH([gd],
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AS_HELP_STRING([--with-gd=DIR],
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[find libgd include dir and library with prefix DIR]),
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[dnl
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case "$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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AS_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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AS_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 = $libgd_ldflags"
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fi
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dnl Arguments to specify presence of other packages/features.
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AC_ARG_WITH([binutils],
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AS_HELP_STRING([--with-binutils=PATH],
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[specify location of binutils (as and ld)]),
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[path_binutils=$withval],
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[path_binutils=''])
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AC_ARG_WITH([selinux],
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AS_HELP_STRING([--with-selinux],
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[if building with SELinux support]),
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[with_selinux=$withval],
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[with_selinux=auto])
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AC_ARG_WITH([headers],
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AS_HELP_STRING([--with-headers=PATH],
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[location of system headers to use
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(for example /usr/src/linux/include)
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@<:@default=compiler default@:>@]),
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[sysheaders=$withval],
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[sysheaders=''])
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AC_SUBST(sysheaders)
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dnl Additional build flags injection.
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AC_ARG_WITH([nonshared-cflags],
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AS_HELP_STRING([--with-nonshared-cflags=CFLAGS],
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[build nonshared libraries with additional CFLAGS]),
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[extra_nonshared_cflags=$withval],
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[extra_nonshared_cflags=])
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AC_SUBST(extra_nonshared_cflags)
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AC_ARG_WITH([rtld-early-cflags],
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AS_HELP_STRING([--with-rtld-early-cflags=CFLAGS],
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[build early initialization with additional CFLAGS]),
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[rtld_early_cflags=$withval],
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[rtld_early_cflags=])
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AC_SUBST(rtld_early_cflags)
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AC_ARG_WITH([timeoutfactor],
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AS_HELP_STRING([--with-timeoutfactor=NUM],
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[specify an integer to scale the timeout]),
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[timeoutfactor=$withval],
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[timeoutfactor=1])
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AC_DEFINE_UNQUOTED(TIMEOUTFACTOR, $timeoutfactor)
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man_pages_version=6.9.1
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AC_ARG_WITH([man-pages],
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AS_HELP_STRING([--with-man-pages=VERSION],
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[tie manual to a specific man-pages version]),
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[man_pages_version=$withval],
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[])
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AC_SUBST(man_pages_version)
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AC_ARG_ENABLE([sanity-checks],
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AS_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=$enableval],
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[enable_sanity=yes])
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AC_ARG_ENABLE([shared],
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AS_HELP_STRING([--enable-shared],
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[build shared library @<:@default=yes if GNU ld@:>@]),
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[shared=$enableval],
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[shared=yes])
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AC_ARG_ENABLE([profile],
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AS_HELP_STRING([--enable-profile],
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[build profiled library @<:@default=no@:>@]),
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[profile=$enableval],
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[profile=no])
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AC_ARG_ENABLE([default-pie],
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AS_HELP_STRING([--disable-default-pie],
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[Do not build glibc programs and the testsuite as PIE @<:@default=no@:>@]),
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[default_pie=$enableval],
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[default_pie=yes])
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AC_ARG_ENABLE([timezone-tools],
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AS_HELP_STRING([--disable-timezone-tools],
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[do not install timezone tools @<:@default=install@:>@]),
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[enable_timezone_tools=$enableval],
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[enable_timezone_tools=yes])
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AC_SUBST(enable_timezone_tools)
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AC_ARG_ENABLE([hardcoded-path-in-tests],
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AS_HELP_STRING([--enable-hardcoded-path-in-tests],
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[hardcode newly built glibc path in tests @<:@default=no@:>@]),
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[hardcoded_path_in_tests=$enableval],
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[hardcoded_path_in_tests=no])
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AC_SUBST(hardcoded_path_in_tests)
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AC_ARG_ENABLE([hidden-plt],
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AS_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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AS_HELP_STRING([--enable-bind-now],
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[disable lazy relocations in DSOs]),
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[bindnow=$enableval],
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[bindnow=no])
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AC_SUBST(bindnow)
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if test "x$bindnow" = xyes; then
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AC_DEFINE(BIND_NOW)
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fi
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dnl Build glibc with -fstack-protector, -fstack-protector-all, or
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dnl -fstack-protector-strong.
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AC_ARG_ENABLE([stack-protector],
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AS_HELP_STRING([--enable-stack-protector=@<:@yes|no|all|strong@:>@],
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[Use -fstack-protector[-all|-strong] to detect glibc buffer overflows]),
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[enable_stack_protector=$enableval],
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[enable_stack_protector=no])
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case "$enable_stack_protector" in
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all|yes|no|strong) ;;
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*) AC_MSG_ERROR([Not a valid argument for --enable-stack-protector: "$enable_stack_protector"]);;
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esac
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dnl On some platforms we cannot use dynamic loading. We must provide
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dnl static NSS modules.
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AC_ARG_ENABLE([static-nss],
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AS_HELP_STRING([--enable-static-nss],
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[build static NSS modules @<:@default=no@:>@]),
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[static_nss=$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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AS_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=$enableval],
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[force_install=yes])
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AC_SUBST(force_install)
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AC_ARG_ENABLE([maintainer-mode],
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AS_HELP_STRING([--enable-maintainer-mode],
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[enable make rules and dependencies not useful (and sometimes confusing) to the casual installer]),
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[maintainer=$enableval],
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[maintainer=no])
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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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AS_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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AC_ARG_ENABLE([werror],
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AS_HELP_STRING([--disable-werror],
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[do not build with -Werror]),
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[enable_werror=$enableval],
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[enable_werror=yes])
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AC_SUBST(enable_werror)
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AC_ARG_ENABLE([multi-arch],
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AS_HELP_STRING([--enable-multi-arch],
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[enable single DSO with optimizations for multiple architectures]),
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[multi_arch=$enableval],
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[multi_arch=default])
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AC_ARG_ENABLE([memory-tagging],
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AS_HELP_STRING([--enable-memory-tagging],
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[enable memory tagging if supported by the architecture @<:@default=no@:>@]),
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[memory_tagging=$enableval],
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[memory_tagging=no])
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if test "$memory_tagging" = yes; then
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# Only enable this on architectures that support it.
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case $host_cpu in
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aarch64)
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AC_DEFINE(USE_MTAG)
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;;
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esac
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fi
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AC_SUBST(memory_tagging)
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AC_ARG_ENABLE([systemtap],
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[AS_HELP_STRING([--enable-systemtap],
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[enable systemtap static probe points @<:@default=no@:>@])],
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[systemtap=$enableval],
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[systemtap=no])
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if test "x$systemtap" != xno; then
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AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl
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old_CFLAGS="$CFLAGS"
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CFLAGS="-std=gnu11 $CFLAGS"
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h>
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void foo (int i, void *p)
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{
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asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) ""
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:: STAP_PROBE_ASM_OPERANDS (2, i, p));
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}]])], [libc_cv_sdt=yes], [libc_cv_sdt=no])
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CFLAGS="$old_CFLAGS"])
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if test $libc_cv_sdt = yes; then
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AC_DEFINE([USE_STAP_PROBE])
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elif test "x$systemtap" != xauto; then
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AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support])
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fi
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fi
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AC_ARG_ENABLE([build-nscd],
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[AS_HELP_STRING([--disable-build-nscd],
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[disable building and installing the nscd daemon])],
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[build_nscd=$enableval],
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[build_nscd=default])
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AC_SUBST(build_nscd)
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# Note the use of $use_nscd is near the bottom of the file.
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AC_ARG_ENABLE([nscd],
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[AS_HELP_STRING([--disable-nscd],
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[library functions will not contact the nscd daemon])],
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[use_nscd=$enableval],
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[use_nscd=yes])
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AC_ARG_ENABLE([pt_chown],
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[AS_HELP_STRING([--enable-pt_chown],
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|
[Enable building and installing pt_chown])],
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[build_pt_chown=$enableval],
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[build_pt_chown=no])
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AC_SUBST(build_pt_chown)
|
|
if test "$build_pt_chown" = yes; then
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AC_DEFINE(HAVE_PT_CHOWN)
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fi
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|
# The abi-tags file uses a fairly simplistic model for name recognition that
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# can't distinguish i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a
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# $host_os of `gnu*' here to be `gnu-gnu*' just so that it can tell.
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# This doesn't get used much beyond that, so it's fairly safe.
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|
case "$host_os" in
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linux*)
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;;
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gnu*)
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host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
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;;
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|
esac
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|
|
|
AC_ARG_ENABLE([mathvec],
|
|
[AS_HELP_STRING([--enable-mathvec],
|
|
[Enable building and installing mathvec @<:@default depends on architecture@:>@])],
|
|
[build_mathvec=$enableval],
|
|
[build_mathvec=notset])
|
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|
|
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
|
|
#ifndef __CET__
|
|
# error no CET compiler support
|
|
#endif]])],
|
|
[libc_cv_compiler_default_cet=yes],
|
|
[libc_cv_compiler_default_cet=no])
|
|
|
|
AC_ARG_ENABLE([cet],
|
|
AS_HELP_STRING([--enable-cet],
|
|
[enable Intel Control-flow Enforcement Technology (CET), x86 only]),
|
|
[enable_cet=$enableval],
|
|
[enable_cet=$libc_cv_compiler_default_cet])
|
|
|
|
AC_ARG_ENABLE([scv],
|
|
AS_HELP_STRING([--disable-scv],
|
|
[syscalls will not use scv instruction, even if the kernel supports it, powerpc only]),
|
|
[use_scv=$enableval],
|
|
[use_scv=yes])
|
|
|
|
AS_IF([[test "$use_scv" != "no"]],[AC_DEFINE(USE_PPC_SCV)])
|
|
|
|
dnl Build glibc with _FORTIFY_SOURCE
|
|
AC_ARG_ENABLE(fortify-source,
|
|
AS_HELP_STRING([--enable-fortify-source@<:@=1|2|3@:>@],
|
|
[Use -D_FORTIFY_SOURCE=[1|2|3] to control code hardening, defaults to highest possible value supported by the build compiler.]),
|
|
[enable_fortify_source=$enableval],
|
|
[enable_fortify_source=no])
|
|
case "$enable_fortify_source" in
|
|
1|2|3|no|yes) ;;
|
|
*) AC_MSG_ERROR([Not a valid argument for --enable-fortify-source: "$enable_fortify_source"]);;
|
|
esac
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|
|
|
# We keep the original values in `$config_*' and never modify them, so we
|
|
# can write them unchanged into config.make. Everything else uses
|
|
# $machine, $vendor, and $os, and changes them whenever convenient.
|
|
config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
|
|
|
|
# Don't allow vendor == "unknown"
|
|
test "$config_vendor" = unknown && config_vendor=
|
|
config_os="`echo $config_os | sed 's/^unknown-//'`"
|
|
|
|
# Some configurations imply other options.
|
|
elf=yes
|
|
|
|
# The configure fragment of a port can modify these to supplement
|
|
# or override the table in the case statement below. No fragment should
|
|
# ever change the config_* variables, however.
|
|
machine=$config_machine
|
|
vendor=$config_vendor
|
|
os=$config_os
|
|
base_os=''
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|
|
|
submachine=
|
|
AC_ARG_WITH([cpu],
|
|
AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
|
|
[dnl
|
|
case "$withval" in
|
|
yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
|
|
no) ;;
|
|
*) submachine="$withval" ;;
|
|
esac
|
|
])
|
|
|
|
# An preconfigure script can set this when it wants to disable the sanity
|
|
# check below.
|
|
libc_config_ok=no
|
|
|
|
# A preconfigure script for a system that may or may not use fpu
|
|
# sysdeps directories sets this to a preprocessor conditional for
|
|
# whether to use such directories.
|
|
with_fp_cond=1
|
|
|
|
# A preconfigure script may define another name to TLS descriptor variant
|
|
mtls_descriptor=gnu2
|
|
|
|
dnl Let sysdeps/*/preconfigure act here.
|
|
LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
|
|
|
|
|
|
###
|
|
### By using the undocumented --enable-hacker-mode option for configure
|
|
### one can skip this test to make the configuration not fail for unsupported
|
|
### platforms.
|
|
###
|
|
if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
|
|
case "$machine-$host_os" in
|
|
*-linux* | *-gnu*)
|
|
;;
|
|
*)
|
|
AC_MSG_ERROR([
|
|
*** The GNU C library is currently unavailable for this platform.
|
|
*** If you are interested in seeing glibc on this platform visit
|
|
*** the "How to submit a new port" in the wiki:
|
|
*** https://sourceware.org/glibc/wiki/#Development
|
|
*** and join the community!])
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
# Set base_machine if not set by a preconfigure fragment.
|
|
test -n "$base_machine" || base_machine=$machine
|
|
AC_SUBST(base_machine)
|
|
|
|
### Locate tools.
|
|
|
|
AC_PROG_INSTALL
|
|
if test "$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
|
|
|
|
LIBC_PROG_BINUTILS
|
|
|
|
# Accept binutils 2.25 or newer.
|
|
libc_cv_with_lld=no
|
|
case $($LD --version) in
|
|
"GNU gold"*)
|
|
# Accept gold 1.14 or higher
|
|
AC_CHECK_PROG_VER(LD, $LD, --version,
|
|
[GNU gold.* \([0-9][0-9]*\.[0-9.]*\)],
|
|
[1.1[4-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*],
|
|
LD=: critic_missing="$critic_missing GNU gold")
|
|
;;
|
|
"LLD"*)
|
|
# Accept LLD 13.0.0 or higher
|
|
AC_CHECK_PROG_VER(LD, $LD, --version,
|
|
[LLD.* \([0-9][0-9]*\.[0-9.]*\)],
|
|
[1[3-9].*|[2-9][0-9].*],
|
|
LD=: critic_missing="$critic_missing LLD")
|
|
libc_cv_with_lld=yes
|
|
;;
|
|
*)
|
|
AC_CHECK_PROG_VER(LD, $LD, --version,
|
|
[GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
|
|
[2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
|
|
LD=: critic_missing="$critic_missing GNU ld")
|
|
;;
|
|
esac
|
|
LIBC_CONFIG_VAR([with-lld], [$libc_cv_with_lld])
|
|
|
|
# These programs are version sensitive.
|
|
AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
|
|
[GNU Make[^0-9]*\([0-9][0-9.]*\)],
|
|
[[4-9].* | [1-9][0-9]*], 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.[7-9]*|4.[1-9][0-9]*|[5-9].*],
|
|
MAKEINFO=: aux_missing="$aux_missing makeinfo")
|
|
AC_CHECK_PROG_VER(SED, sed, --version,
|
|
[GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)],
|
|
[3.0[2-9]*|3.[1-9]*|[4-9]*],
|
|
SED=: aux_missing="$aux_missing sed")
|
|
AC_CHECK_PROG_VER(AWK, gawk, --version,
|
|
[GNU Awk[^0-9]*\([0-9][0-9.]*\)],
|
|
[3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk")
|
|
AC_CHECK_PROG_VER(BISON, bison, --version,
|
|
[bison (GNU Bison) \([0-9]*\.[0-9.]*\)],
|
|
[2.7*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing bison")
|
|
|
|
AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [
|
|
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
|
|
#if !defined __GNUC__ || __GNUC__ < 6 || (__GNUC__ == 6 && __GNUC_MINOR__ < 2)
|
|
#error insufficient compiler
|
|
#endif]])],
|
|
[libc_cv_compiler_ok=yes],
|
|
[libc_cv_compiler_ok=no])])
|
|
AS_IF([test $libc_cv_compiler_ok != yes],
|
|
[critic_missing="$critic_missing compiler"])
|
|
|
|
if test "x$maintainer" = "xyes"; then
|
|
AC_CHECK_PROGS(AUTOCONF, autoconf, no)
|
|
case "x$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.ac > /dev/null 2>&1); then
|
|
libc_cv_autoconf_works=yes
|
|
else
|
|
libc_cv_autoconf_works=no
|
|
fi])
|
|
test $libc_cv_autoconf_works = yes || AUTOCONF=no
|
|
;;
|
|
esac
|
|
if test "x$AUTOCONF" = xno; then
|
|
aux_missing="$aux_missing autoconf"
|
|
fi
|
|
else
|
|
AUTOCONF=no
|
|
fi
|
|
|
|
# Check for python3 if available, or else python.
|
|
AC_CHECK_PROG_VER(PYTHON_PROG, python3 python, --version,
|
|
[Python \([0-9][0-9.]*\)],
|
|
[3.[4-9]*|3.[1-9][0-9]*|[4-9].*|[1-9][0-9]*],
|
|
critic_missing="$critic_missing python")
|
|
PYTHON="$PYTHON_PROG -B"
|
|
AC_SUBST(PYTHON)
|
|
|
|
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 or tests will be disabled.
|
|
*** Check the INSTALL file for required versions.])
|
|
|
|
|
|
# Determine whether to use fpu or nofpu sysdeps directories.
|
|
AC_CACHE_CHECK([for use of fpu sysdeps directories],
|
|
libc_cv_with_fp, [dnl
|
|
cat > conftest.c <<EOF
|
|
#if $with_fp_cond
|
|
int dummy;
|
|
#else
|
|
# error "no hardware floating point"
|
|
#endif
|
|
EOF
|
|
libc_cv_with_fp=no
|
|
if ${CC-cc} $CFLAGS $CPPFLAGS -S conftest.c -o conftest.s \
|
|
1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
|
|
libc_cv_with_fp=yes
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_with_fp)
|
|
|
|
AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
|
|
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
|
|
[libc_cv_ssp=yes],
|
|
[libc_cv_ssp=no])
|
|
])
|
|
|
|
AC_CACHE_CHECK(for -fstack-protector-strong, libc_cv_ssp_strong, [dnl
|
|
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-strong],
|
|
[libc_cv_ssp_strong=yes],
|
|
[libc_cv_ssp_strong=no])
|
|
])
|
|
|
|
AC_CACHE_CHECK(for -fstack-protector-all, libc_cv_ssp_all, [dnl
|
|
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-all],
|
|
[libc_cv_ssp_all=yes],
|
|
[libc_cv_ssp_all=no])
|
|
])
|
|
|
|
stack_protector=
|
|
no_stack_protector=
|
|
if test "$libc_cv_ssp" = yes; then
|
|
no_stack_protector="-fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0"
|
|
AC_DEFINE(HAVE_CC_NO_STACK_PROTECTOR)
|
|
fi
|
|
|
|
if test "$enable_stack_protector" = yes && test "$libc_cv_ssp" = yes; then
|
|
stack_protector="-fstack-protector"
|
|
AC_DEFINE(STACK_PROTECTOR_LEVEL, 1)
|
|
elif test "$enable_stack_protector" = all && test "$libc_cv_ssp_all" = yes; then
|
|
stack_protector="-fstack-protector-all"
|
|
AC_DEFINE(STACK_PROTECTOR_LEVEL, 2)
|
|
elif test "$enable_stack_protector" = strong && test "$libc_cv_ssp_strong" = yes; then
|
|
stack_protector="-fstack-protector-strong"
|
|
AC_DEFINE(STACK_PROTECTOR_LEVEL, 3)
|
|
else
|
|
stack_protector="-fno-stack-protector"
|
|
AC_DEFINE(STACK_PROTECTOR_LEVEL, 0)
|
|
fi
|
|
AC_SUBST(libc_cv_ssp)
|
|
AC_SUBST(stack_protector)
|
|
AC_SUBST(no_stack_protector)
|
|
|
|
if test -n "$stack_protector"; then
|
|
dnl Don't run configure tests with stack-protection on, to avoid problems with
|
|
dnl bootstrapping.
|
|
no_ssp=-fno-stack-protector
|
|
else
|
|
no_ssp=
|
|
|
|
if test "$enable_stack_protector" != no; then
|
|
AC_MSG_ERROR([--enable-stack-protector=$enable_stack_protector specified, but specified level of stack protection is not supported by the compiler.])
|
|
fi
|
|
fi
|
|
|
|
# For the multi-arch option we need support in the assembler & linker.
|
|
AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support],
|
|
libc_cv_ld_gnu_indirect_function, [dnl
|
|
cat > conftest.S <<EOF
|
|
.type foo,%gnu_indirect_function
|
|
foo:
|
|
.globl _start
|
|
_start:
|
|
.globl __start
|
|
__start:
|
|
.data
|
|
#ifdef _LP64
|
|
.quad foo
|
|
#else
|
|
.long foo
|
|
#endif
|
|
EOF
|
|
libc_cv_ld_gnu_indirect_function=no
|
|
if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
|
|
-nostartfiles -nostdlib $no_ssp \
|
|
-o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
|
|
# Do a link to see if the backend supports IFUNC relocs.
|
|
$READELF -r conftest 1>&AS_MESSAGE_LOG_FD
|
|
LC_ALL=C $READELF -Wr conftest | grep -q 'IRELATIVE\|R_SPARC_JMP_IREL' && {
|
|
libc_cv_ld_gnu_indirect_function=yes
|
|
}
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
# Check if gcc supports attribute ifunc as it is used in libc_ifunc macro.
|
|
AC_CACHE_CHECK([for gcc attribute ifunc support],
|
|
libc_cv_gcc_indirect_function, [dnl
|
|
cat > conftest.c <<EOF
|
|
extern int func (int);
|
|
int used_func (int a)
|
|
{
|
|
return a;
|
|
}
|
|
static void *resolver ()
|
|
{
|
|
return &used_func;
|
|
}
|
|
extern __typeof (func) func __attribute__ ((ifunc ("resolver")));
|
|
EOF
|
|
libc_cv_gcc_indirect_function=no
|
|
if ${CC-cc} -c conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD \
|
|
2>&AS_MESSAGE_LOG_FD ; then
|
|
if $READELF -s conftest.o | grep IFUNC >/dev/null 2>&AS_MESSAGE_LOG_FD; then
|
|
libc_cv_gcc_indirect_function=yes
|
|
fi
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
# Check if linker supports textrel relocation with ifunc (used on elf/tests).
|
|
# Note that it relies on libc_cv_ld_gnu_indirect_function test above.
|
|
AC_CACHE_CHECK([whether the linker supports textrels along with ifunc],
|
|
libc_cv_textrel_ifunc, [dnl
|
|
cat > conftest.S <<EOF
|
|
.type foo,%gnu_indirect_function
|
|
foo:
|
|
.globl _start
|
|
_start:
|
|
.globl __start
|
|
__start:
|
|
.data
|
|
#ifdef _LP64
|
|
.quad foo
|
|
#else
|
|
.long foo
|
|
#endif
|
|
.text
|
|
.globl address
|
|
address:
|
|
#ifdef _LP64
|
|
.quad address
|
|
#else
|
|
.long address
|
|
#endif
|
|
EOF
|
|
libc_cv_textrel_ifunc=no
|
|
if test $libc_cv_ld_gnu_indirect_function = yes; then
|
|
if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostartfiles -nostdlib $no_ssp -pie -o conftest conftest.S); then
|
|
libc_cv_textrel_ifunc=yes
|
|
fi
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_textrel_ifunc)
|
|
|
|
# Check if CC supports attribute retain as it is used in attribute_used_retain macro.
|
|
AC_CACHE_CHECK([for GNU attribute retain support],
|
|
libc_cv_gnu_retain, [dnl
|
|
cat > conftest.c <<EOF
|
|
static int var __attribute__ ((used, retain, section ("__libc_atexit")));
|
|
EOF
|
|
libc_cv_gnu_retain=no
|
|
if ${CC-cc} -Werror -c conftest.c -o /dev/null 1>&AS_MESSAGE_LOG_FD \
|
|
2>&AS_MESSAGE_LOG_FD ; then
|
|
libc_cv_gnu_retain=yes
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_gnu_retain = yes; then
|
|
AC_DEFINE(HAVE_GNU_RETAIN)
|
|
fi
|
|
LIBC_CONFIG_VAR([have-gnu-retain], [$libc_cv_gnu_retain])
|
|
|
|
# Check if gcc warns about alias for function with incompatible types.
|
|
AC_CACHE_CHECK([if compiler warns about alias for function with incompatible types],
|
|
libc_cv_gcc_incompatible_alias, [dnl
|
|
cat > conftest.c <<EOF
|
|
int __redirect_foo (const void *s, int c);
|
|
|
|
__typeof (__redirect_foo) *foo_impl (void) __asm__ ("foo");
|
|
__typeof (__redirect_foo) *foo_impl (void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
extern __typeof (__redirect_foo) foo_alias __attribute__ ((alias ("foo")));
|
|
EOF
|
|
libc_cv_gcc_incompatible_alias=yes
|
|
if ${CC-cc} -Werror -c conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
|
|
libc_cv_gcc_incompatible_alias=no
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then
|
|
if test x"$multi_arch" = xyes; then
|
|
AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
|
|
else
|
|
multi_arch=no
|
|
fi
|
|
fi
|
|
if test x"$libc_cv_gcc_indirect_function" != xyes; then
|
|
# GCC 8+ emits a warning for alias with incompatible types and it might
|
|
# fail to build ifunc resolvers aliases to either weak or internal
|
|
# symbols. Disables multiarch build in this case.
|
|
if test x"$libc_cv_gcc_incompatible_alias" = xyes; then
|
|
AC_MSG_WARN([gcc emits a warning for alias between functions of incompatible types])
|
|
if test x"$multi_arch" = xyes; then
|
|
AC_MSG_ERROR([--enable-multi-arch support requires a gcc with gnu-indirect-function support])
|
|
fi
|
|
AC_MSG_WARN([Multi-arch is disabled.])
|
|
multi_arch=no
|
|
elif test x"$multi_arch" = xyes; then
|
|
AC_MSG_WARN([--enable-multi-arch support recommends a gcc with gnu-indirect-function support.
|
|
Please use a gcc which supports it by default or configure gcc with --enable-gnu-indirect-function])
|
|
fi
|
|
fi
|
|
multi_arch_d=
|
|
if test x"$multi_arch" != xno; then
|
|
multi_arch_d=/multiarch
|
|
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'`"
|
|
|
|
test "x$base_os" != x || case "$os" in
|
|
gnu*)
|
|
base_os=mach/hurd ;;
|
|
linux*)
|
|
base_os=unix/sysv ;;
|
|
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${submachine:+/$submachine}
|
|
while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
|
|
set $m
|
|
# Prepend the machine's FPU directory unless the architecture specific
|
|
# preconfigure disables it.
|
|
if test "$libc_cv_with_fp" = yes; then
|
|
maybe_fpu=/fpu
|
|
else
|
|
maybe_fpu=/nofpu
|
|
fi
|
|
# For each machine term, try it with and then without /multiarch.
|
|
for try_fpu in $maybe_fpu ''; do
|
|
for try_multi in $multi_arch_d ''; do
|
|
mach="$mach /$1$try_fpu$try_multi"
|
|
done
|
|
done
|
|
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=
|
|
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 $mach ''; do
|
|
try_suffix="$m0$b$v$o$m"
|
|
if test -n "$try_suffix"; then
|
|
try_srcdir="${srcdir}/"
|
|
try="sysdeps$try_suffix"
|
|
test -n "$enable_debug_configure" &&
|
|
echo "$0 [DEBUG]: try $try" >&2
|
|
if test -d "$try_srcdir$try"; then
|
|
sysnames="$sysnames $try"
|
|
{ test -n "$o" || test -n "$b"; } && os_used=t
|
|
{ test -n "$m" || test -n "$m0"; } && machine_used=t
|
|
case x${m0:-$m} in
|
|
x*/$submachine) submachine_used=t ;;
|
|
esac
|
|
fi
|
|
fi
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
|
|
# If the assembler supports gnu_indirect_function symbol type and the
|
|
# architecture supports multi-arch, we enable multi-arch by default.
|
|
case $sysnames in
|
|
*"$multi_arch_d"*)
|
|
;;
|
|
*)
|
|
test x"$multi_arch" = xdefault && multi_arch=no
|
|
;;
|
|
esac
|
|
if test x"$multi_arch" != xno; then
|
|
AC_DEFINE(USE_MULTIARCH)
|
|
fi
|
|
AC_SUBST(multi_arch)
|
|
|
|
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 $machine is not supported.)
|
|
fi
|
|
if test -z "$submachine_used" && test -n "$submachine"; then
|
|
AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
|
|
fi
|
|
AC_SUBST(submachine)
|
|
|
|
# We have now validated the configuration.
|
|
|
|
# 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
|
|
|
|
for implies_file in Implies Implies-before Implies-after; do
|
|
implies_type=`echo $implies_file | sed s/-/_/`
|
|
eval ${implies_type}=
|
|
if test -f $xsrcdir$name/$implies_file; then
|
|
# Collect more names from the `Implies' file (removing comments).
|
|
implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`"
|
|
for x in $implied_candidate; do
|
|
found=no
|
|
if test -d $xsrcdir$name_base/$x; then
|
|
eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\""
|
|
found=yes
|
|
fi
|
|
try="sysdeps/$x"
|
|
try_srcdir=$srcdir/
|
|
test -n "$enable_debug_configure" &&
|
|
echo "[DEBUG]: $name $implies_file $x try() {$try_srcdir}$try" >&2
|
|
if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
|
|
then
|
|
eval "${implies_type}=\"\$${implies_type} \$try\""
|
|
found=yes
|
|
fi
|
|
if test $found = no; then
|
|
AC_MSG_WARN($name/$implies_file specifies nonexistent $x)
|
|
fi
|
|
done
|
|
fi
|
|
done
|
|
|
|
# Add NAME to the list of names.
|
|
names="$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$/q' -e p`"
|
|
changequote([,])dnl
|
|
|
|
test -n "$enable_debug_configure" &&
|
|
echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \
|
|
Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2
|
|
|
|
# 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 $Implies $* $Implies_before $parent $Implies_after`"
|
|
test -n "$sysnames" && set $sysnames
|
|
done
|
|
|
|
# Add the default directories.
|
|
default_sysnames="sysdeps/generic"
|
|
sysnames="$names $default_sysnames"
|
|
AC_SUBST(sysnames)
|
|
# The other names were emitted during the scan.
|
|
AC_MSG_RESULT($default_sysnames)
|
|
|
|
# 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 "$sysheaders"; then
|
|
SYSINCLUDES=-nostdinc
|
|
for d in include include-fixed; do
|
|
i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
|
|
SYSINCLUDES="$SYSINCLUDES -isystem $i"
|
|
done
|
|
SYSINCLUDES="$SYSINCLUDES \
|
|
-isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
|
|
if test -n "$CXX"; then
|
|
CXX_SYSINCLUDES=
|
|
for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \
|
|
| sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do
|
|
test "x$cxxheaders" != x &&
|
|
CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders"
|
|
done
|
|
fi
|
|
fi
|
|
AC_SUBST(SYSINCLUDES)
|
|
AC_SUBST(CXX_SYSINCLUDES)
|
|
|
|
# Obtain some C++ header file paths. This is used to make a local
|
|
# copy of those headers in Makerules.
|
|
if test -n "$CXX"; then
|
|
find_cxx_header () {
|
|
echo "#include <$1>" | $CXX -H -fsyntax-only -x c++ - 2>&1 \
|
|
| $AWK '$1 == "."{print $2}'
|
|
}
|
|
CXX_CSTDLIB_HEADER="$(find_cxx_header cstdlib)"
|
|
CXX_CMATH_HEADER="$(find_cxx_header cmath)"
|
|
CXX_BITS_STD_ABS_H="$(find_cxx_header bits/std_abs.h)"
|
|
fi
|
|
AC_SUBST(CXX_CSTDLIB_HEADER)
|
|
AC_SUBST(CXX_CMATH_HEADER)
|
|
AC_SUBST(CXX_BITS_STD_ABS_H)
|
|
|
|
# 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 "$ld_library_path_setting" != "ok"; then
|
|
AC_MSG_ERROR([
|
|
*** LD_LIBRARY_PATH shouldn't contain the current directory when
|
|
*** building glibc. Please change the environment variable
|
|
*** and run configure again.])
|
|
fi
|
|
|
|
AC_PATH_PROG(BASH_SHELL, bash, no)
|
|
|
|
AC_PATH_PROG(PERL, perl, no)
|
|
if test "$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_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
|
|
cat > conftest.s <<EOF
|
|
.text
|
|
foo:
|
|
.set glibc_conftest_frobozz,foo
|
|
.globl 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 $no_ssp \
|
|
-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 $libc_cv_asm_set_directive = yes; then
|
|
AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(linker support for protected data symbol,
|
|
libc_cv_protected_data,
|
|
[cat > conftest.c <<EOF
|
|
int bar __attribute__ ((visibility ("protected"))) = 1;
|
|
EOF
|
|
libc_cv_protected_data=no
|
|
if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles $no_ssp -fPIC -shared conftest.c -o conftest.so); then
|
|
cat > conftest.c <<EOF
|
|
extern int bar;
|
|
int main (void) { return bar; }
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles $no_ssp conftest.c -o conftest conftest.so); then
|
|
libc_cv_protected_data=yes
|
|
fi
|
|
fi
|
|
rm -f conftest.*
|
|
])
|
|
AC_SUBST(libc_cv_protected_data)
|
|
|
|
AC_CACHE_CHECK(linker support for INSERT in linker script,
|
|
libc_cv_insert,
|
|
[cat > conftest.c <<EOF
|
|
int __attribute__ ((section(".bar"))) bar = 0x12345678;
|
|
int test (void) { return bar; }
|
|
EOF
|
|
cat > conftest.t <<EOF
|
|
SECTIONS
|
|
{
|
|
.bar : { *(.bar) }
|
|
}
|
|
INSERT AFTER .rela.dyn;
|
|
EOF
|
|
libc_cv_insert=no
|
|
if AC_TRY_COMMAND([${CC-cc} -nostdlib -nostartfiles $no_ssp -fPIC -shared conftest.c -Wl,-T,conftest.t -o conftest.so]); then
|
|
libc_cv_insert=yes
|
|
fi
|
|
rm -f conftest.*
|
|
])
|
|
AC_SUBST(libc_cv_insert)
|
|
|
|
AC_CACHE_CHECK(for broken __attribute__((alias())),
|
|
libc_cv_broken_alias_attribute,
|
|
[cat > conftest.c <<EOF
|
|
extern int foo (int x) __asm ("xyzzy");
|
|
int bar (int x) { return x; }
|
|
extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
|
|
extern int dfoo;
|
|
extern __typeof (dfoo) dfoo __asm ("abccb");
|
|
int dfoo = 1;
|
|
EOF
|
|
libc_cv_broken_alias_attribute=yes
|
|
if AC_TRY_COMMAND(${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_MSG_ERROR(working alias attribute support required)
|
|
fi
|
|
|
|
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 -fPIC -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
|
|
|
|
AC_CACHE_CHECK(for libunwind-support in compiler,
|
|
libc_cv_cc_with_libunwind, [
|
|
cat > conftest.c <<EOF
|
|
int main (void) { return 0; }
|
|
EOF
|
|
if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
|
|
conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; then
|
|
libc_cv_cc_with_libunwind=yes
|
|
else
|
|
libc_cv_cc_with_libunwind=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_cc_with_libunwind)
|
|
if test $libc_cv_cc_with_libunwind = yes; then
|
|
AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
|
|
fi
|
|
|
|
ASFLAGS_config=
|
|
AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
|
|
libc_cv_as_noexecstack, [dnl
|
|
cat > conftest.c <<EOF
|
|
void foo (void) { }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
|
|
-S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
|
|
&& grep .note.GNU-stack conftest.s >/dev/null \
|
|
&& AC_TRY_COMMAND([${CC-cc} $ASFLAGS -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)
|
|
|
|
LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack],
|
|
[libc_cv_z_execstack=yes], [libc_cv_z_execstack=no])
|
|
AC_SUBST(libc_cv_z_execstack)
|
|
|
|
LIBC_LINKER_FEATURE([-z start-stop-gc], [-Wl,-z,start-stop-gc],
|
|
[libc_cv_z_start_stop_gc=yes], [libc_cv_z_start_stop_gc=no])
|
|
LIBC_CONFIG_VAR([have-z-start-stop-gc], [$libc_cv_z_start_stop_gc])
|
|
|
|
LIBC_LINKER_FEATURE([--depaudit], [-Wl,--depaudit,x],
|
|
[libc_cv_depaudit=yes], [libc_cv_depaudit=no])
|
|
LIBC_CONFIG_VAR([have-depaudit], [$libc_cv_depaudit])
|
|
|
|
LIBC_LINKER_FEATURE([-z pack-relative-relocs],
|
|
[-Wl,-z,pack-relative-relocs],
|
|
[libc_cv_dt_relr=yes], [libc_cv_dt_relr=no])
|
|
LIBC_CONFIG_VAR([have-dt-relr], [$libc_cv_dt_relr])
|
|
|
|
LIBC_LINKER_FEATURE([--no-dynamic-linker],
|
|
[-Wl,--no-dynamic-linker],
|
|
[libc_cv_no_dynamic_linker=yes],
|
|
[libc_cv_no_dynamic_linker=no])
|
|
LIBC_CONFIG_VAR([have-no-dynamic-linker], [$libc_cv_no_dynamic_linker])
|
|
|
|
AC_CACHE_CHECK(for -static-pie, libc_cv_static_pie, [dnl
|
|
LIBC_TRY_CC_OPTION([-static-pie],
|
|
[libc_cv_static_pie=yes],
|
|
[libc_cv_static_pie=no])
|
|
])
|
|
LIBC_CONFIG_VAR([have-static-pie], [$libc_cv_static_pie])
|
|
|
|
AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
|
|
LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no])
|
|
])
|
|
|
|
AC_SUBST(libc_cv_fpie)
|
|
|
|
AC_CACHE_CHECK(for GLOB_DAT reloc,
|
|
libc_cv_has_glob_dat, [dnl
|
|
cat > conftest.c <<EOF
|
|
extern int mumble;
|
|
int foo (void) { return mumble; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-fPIC -shared -o conftest.so conftest.c
|
|
-nostdlib -nostartfiles $no_ssp
|
|
1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
dnl look for GLOB_DAT relocation.
|
|
if $READELF -rW conftest.so | grep '_GLOB_DAT' > /dev/null; then
|
|
libc_cv_has_glob_dat=yes
|
|
else
|
|
libc_cv_has_glob_dat=no
|
|
fi
|
|
else
|
|
libc_cv_has_glob_dat=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_has_glob_dat)
|
|
|
|
AC_CACHE_CHECK([for tls descriptor support], libc_cv_mtls_descriptor,
|
|
[dnl
|
|
cat > conftest.c <<EOF
|
|
__thread int i;
|
|
void foo (void)
|
|
{
|
|
i = 10;
|
|
}
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -fPIC -mtls-dialect=$mtls_descriptor -nostdlib -nostartfiles
|
|
-shared conftest.c -o conftest 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_mtls_descriptor=$mtls_descriptor
|
|
else
|
|
libc_cv_mtls_descriptor=no
|
|
fi
|
|
rm -f conftest*])
|
|
LIBC_CONFIG_VAR([have-mtls-descriptor], [$libc_cv_mtls_descriptor])
|
|
|
|
dnl clang emits an warning for a double alias redirection, to warn the
|
|
dnl original symbol is sed even when weak definition overrides it.
|
|
dnl It is a usual pattern for weak_alias, where multiple alias point to
|
|
dnl same symbol.
|
|
AC_CACHE_CHECK([if -Wno-ignored-attributes is required for aliases],
|
|
libc_cv_wno_ignored_attributes, [dnl
|
|
cat > conftest.c <<EOF
|
|
void __foo (void)
|
|
{
|
|
}
|
|
extern __typeof (__foo) foo __attribute__ ((weak, alias ("__foo")));
|
|
extern __typeof (__foo) bar __attribute__ ((weak, alias ("foo")));
|
|
EOF
|
|
libc_cv_wno_ignored_attributes=""
|
|
if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Werror -c conftest.c])
|
|
then
|
|
libc_cv_wno_ignored_attributes="-Wno-ignored-attributes"
|
|
fi
|
|
rm -f conftest*])
|
|
LIBC_CONFIG_VAR([config-cflags-wno-ignored-attributes],
|
|
[$libc_cv_wno_ignored_attributes])
|
|
|
|
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.{c,s}
|
|
])
|
|
if test $libc_cv_have_section_quotes = yes; then
|
|
AC_DEFINE(HAVE_SECTION_QUOTES)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
|
|
cat > conftest.c <<\EOF
|
|
void zero (void *x)
|
|
{
|
|
__builtin_memset (x, 0, 1000);
|
|
}
|
|
EOF
|
|
dnl
|
|
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | grep -F "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 - | grep -F "my_strstr" > /dev/null]);
|
|
then
|
|
libc_cv_gcc_builtin_redirection=yes
|
|
else
|
|
libc_cv_gcc_builtin_redirection=no
|
|
fi
|
|
rm -f conftest* ])
|
|
if test "$libc_cv_gcc_builtin_redirection" = no; then
|
|
AC_MSG_ERROR([support for the symbol redirection needed])
|
|
fi
|
|
|
|
dnl Determine how to disable generation of FMA instructions.
|
|
AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions],
|
|
libc_cv_cc_nofma, [dnl
|
|
libc_cv_cc_nofma=
|
|
for opt in -ffp-contract=off -mno-fused-madd; do
|
|
LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break])
|
|
done])
|
|
AC_SUBST(libc_cv_cc_nofma)
|
|
|
|
if test -n "$submachine"; then
|
|
AC_CACHE_CHECK([for compiler option for CPU variant],
|
|
libc_cv_cc_submachine, [dnl
|
|
libc_cv_cc_submachine=no
|
|
for opt in "-march=$submachine" "-mcpu=$submachine"; do
|
|
LIBC_TRY_CC_OPTION([$opt], [
|
|
libc_cv_cc_submachine="$opt"
|
|
break], [])
|
|
done])
|
|
if test "x$libc_cv_cc_submachine" = xno; then
|
|
AC_MSG_ERROR([${CC-cc} does not support $submachine])
|
|
fi
|
|
fi
|
|
AC_SUBST(libc_cv_cc_submachine)
|
|
|
|
dnl Determine if compiler supports -fsignaling-nans
|
|
AC_CACHE_CHECK([for compiler option that -fsignaling-nans],
|
|
libc_cv_cc_signaling_nans, [dnl
|
|
LIBC_TRY_CC_OPTION([-Werror -fsignaling-nans],
|
|
[libc_cv_cc_signaling_nans=-fsignaling-nans],
|
|
[libc_cv_cc_signaling_nans=])
|
|
])
|
|
LIBC_CONFIG_VAR([config-cflags-signaling-nans],
|
|
[$libc_cv_cc_signaling_nans])
|
|
|
|
AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \
|
|
__attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl
|
|
cat > conftest.c <<EOF
|
|
void
|
|
__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
|
|
foo (void) {}
|
|
EOF
|
|
libc_cv_cc_loop_to_function=no
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c])
|
|
then
|
|
libc_cv_cc_loop_to_function=yes
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_cc_loop_to_function = yes; then
|
|
AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL)
|
|
fi
|
|
AC_SUBST(libc_cv_cc_loop_to_function)
|
|
|
|
AC_CACHE_CHECK([for -Wimplicit-fallthrough],
|
|
libc_cv_cc_wimplicit_fallthrough, [dnl
|
|
LIBC_TRY_CC_OPTION([-Werror -Wimplicit-fallthrough],
|
|
[libc_cv_cc_wimplicit_fallthrough=-Wimplicit-fallthrough],
|
|
[libc_cv_cc_wimplicit_fallthrough=])
|
|
])
|
|
LIBC_CONFIG_VAR([cc-option-wimplicit-fallthrough],
|
|
[$libc_cv_cc_wimplicit_fallthrough])
|
|
|
|
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="$LIBS -lgd -lpng -lz -lm"
|
|
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <gd.h>]], [[gdImagePng (0, 0)]])],
|
|
[LIBGD=yes], [LIBGD=no])
|
|
CFLAGS="$old_CFLAGS"
|
|
LDFLAGS="$old_LDFLAGS"
|
|
LIBS="$old_LIBS"
|
|
else
|
|
LIBGD=no
|
|
fi
|
|
AC_MSG_RESULT($LIBGD)
|
|
AC_SUBST(LIBGD)
|
|
|
|
# SELinux detection
|
|
if test x$with_selinux = xno ; then
|
|
have_selinux=no;
|
|
else
|
|
# See if we have the SELinux library
|
|
AC_CHECK_LIB(selinux, is_selinux_enabled,
|
|
have_selinux=yes, have_selinux=no)
|
|
if test x$with_selinux = xyes ; then
|
|
if test x$have_selinux = xno ; then
|
|
AC_MSG_ERROR([SELinux explicitly required, but SELinux library not found])
|
|
fi
|
|
fi
|
|
fi
|
|
# Check if we're building with SELinux support.
|
|
if test "x$have_selinux" = xyes; then
|
|
AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
|
|
|
|
# See if we have the libaudit library
|
|
AC_CHECK_LIB(audit, audit_log_user_avc_message,
|
|
have_libaudit=yes, have_libaudit=no)
|
|
if test "x$have_libaudit" = xyes; then
|
|
AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
|
|
fi
|
|
AC_SUBST(have_libaudit)
|
|
|
|
# See if we have the libcap library
|
|
AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
|
|
if test "x$have_libcap" = xyes; then
|
|
AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
|
|
fi
|
|
AC_SUBST(have_libcap)
|
|
fi
|
|
AC_SUBST(have_selinux)
|
|
|
|
dnl Check if we support the requested _FORTIFY_SOURCE level
|
|
dnl If not, then don't use it.
|
|
dnl Note that _FORTIFY_SOURCE may have been set through FLAGS too.
|
|
dnl _FORTIFY_SOURCE value will be selectively disabled for function that can't
|
|
dnl support it
|
|
no_fortify_source="-U_FORTIFY_SOURCE"
|
|
fortify_source="${no_fortify_source}"
|
|
|
|
AC_CACHE_CHECK([for maximum supported _FORTIFY_SOURCE level],
|
|
[libc_cv_supported_fortify_source], [
|
|
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [__builtin_dynamic_object_size("", 0)])],
|
|
[libc_cv_supported_fortify_source=3],
|
|
[libc_cv_supported_fortify_source=2])
|
|
])
|
|
|
|
AS_CASE([$enable_fortify_source],
|
|
[yes], [libc_cv_fortify_source=yes enable_fortify_source=$libc_cv_supported_fortify_source],
|
|
[1|2], [libc_cv_fortify_source=yes],
|
|
[3], [AS_IF([test $libc_cv_supported_fortify_source = 3],
|
|
[libc_cv_fortify_source=yes],
|
|
[AC_MSG_ERROR([Compiler doesn't provide necessary support for _FORTIFY_SOURCE=3])])],
|
|
[libc_cv_fortify_source=no])
|
|
|
|
AS_IF([test "$libc_cv_fortify_source" = yes],
|
|
[fortify_source="${fortify_source} -D_FORTIFY_SOURCE=${enable_fortify_source}"]
|
|
)
|
|
|
|
AC_SUBST(enable_fortify_source)
|
|
AC_SUBST(libc_cv_fortify_source)
|
|
AC_SUBST(no_fortify_source)
|
|
AC_SUBST(fortify_source)
|
|
LIBC_CONFIG_VAR([supported-fortify], [$libc_cv_supported_fortify_source])
|
|
|
|
dnl Check if compiler define _FILE_OFFSET_BITS by default
|
|
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
|
|
#ifndef _FILE_OFFSET_BITS
|
|
# error _FILE_OFFSET_BITS not defined
|
|
#endif]])],
|
|
[libc_cv_compiler_default_file_offset_bits=yes],
|
|
[libc_cv_compiler_default_file_offset_bits=no])
|
|
AS_IF([test "$libc_cv_compiler_default_file_offset_bits" = yes],
|
|
[no_file_offset_bits_source="-U_FILE_OFFSET_BITS"])
|
|
AC_SUBST(no_file_offset_bits_source)
|
|
LIBC_CONFIG_VAR([no-file-offset-bits-source], [$no_file_offset_bits_source])
|
|
|
|
dnl Check if compiler define _TIME_BITS by default
|
|
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
|
|
#ifndef _TIME_BITS
|
|
# error _TIME_BITS not defined
|
|
#endif]])],
|
|
[libc_cv_compiler_default_time_bits=yes],
|
|
[libc_cv_compiler_default_time_bits=no])
|
|
AS_IF([test "$libc_cv_compiler_default_time_bits" = yes],
|
|
[no_time_bits_source="-U_TIME_BITS"])
|
|
AC_SUBST(no_time_bits_source)
|
|
LIBC_CONFIG_VAR([no-time-bits-source], [$no_time_bits_source])
|
|
|
|
dnl Starting with binutils 2.35, GAS can attach multiple symbol versions
|
|
dnl to one symbol (PR 23840).
|
|
AC_CACHE_CHECK(whether the assembler requires one version per symbol,
|
|
libc_cv_symver_needs_alias, [dnl
|
|
cat > conftest.s <<EOF
|
|
.text
|
|
testfunc:
|
|
.globl testfunc
|
|
.symver testfunc, testfunc1@VERSION1
|
|
.symver testfunc, testfunc1@VERSION2
|
|
EOF
|
|
libc_cv_symver_needs_alias=no
|
|
if ${CC-cc} $ASFLAGS -c conftest.s 2>&AS_MESSAGE_LOG_FD; then
|
|
libc_cv_symver_needs_alias=no
|
|
else
|
|
libc_cv_symver_needs_alias=yes
|
|
fi
|
|
rm conftest.*
|
|
])
|
|
if test "$libc_cv_symver_needs_alias" = yes; then
|
|
AC_DEFINE(SYMVER_NEEDS_ALIAS)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for __builtin_trap with no external dependencies,
|
|
libc_cv_builtin_trap, [dnl
|
|
libc_cv_builtin_trap=no
|
|
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[__builtin_trap ()]])],[
|
|
libc_undefs=`$NM -u conftest.o |
|
|
LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \
|
|
2>&AS_MESSAGE_LOG_FD` || {
|
|
AC_MSG_ERROR([confusing output from $NM -u])
|
|
}
|
|
echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'"
|
|
if test -z "$libc_undefs"; then
|
|
libc_cv_builtin_trap=yes
|
|
fi],[])])
|
|
if test $libc_cv_builtin_trap = yes; then
|
|
AC_DEFINE([HAVE_BUILTIN_TRAP])
|
|
fi
|
|
|
|
dnl C++ feature tests.
|
|
AC_LANG_PUSH([C++])
|
|
|
|
AC_CACHE_CHECK([whether the C++ compiler supports thread_local],
|
|
libc_cv_cxx_thread_local, [
|
|
old_CXXFLAGS="$CXXFLAGS"
|
|
CXXFLAGS="$CXXFLAGS -std=gnu++11"
|
|
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
|
|
#include <thread>
|
|
|
|
// Compiler support.
|
|
struct S
|
|
{
|
|
S ();
|
|
~S ();
|
|
};
|
|
thread_local S s;
|
|
S * get () { return &s; }
|
|
|
|
// libstdc++ support.
|
|
#ifndef _GLIBCXX_HAVE___CXA_THREAD_ATEXIT_IMPL
|
|
#error __cxa_thread_atexit_impl not supported
|
|
#endif
|
|
])],
|
|
[libc_cv_cxx_thread_local=yes],
|
|
[libc_cv_cxx_thread_local=no])
|
|
CXXFLAGS="$old_CXXFLAGS"
|
|
])
|
|
AC_SUBST(libc_cv_cxx_thread_local)
|
|
|
|
AC_LANG_POP([C++])
|
|
dnl End of C++ feature tests.
|
|
|
|
### 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=$sysconfdir
|
|
libc_cv_localstatedir=$localstatedir
|
|
libc_cv_gcc_unwind_find_fde=no
|
|
libc_cv_idn=no
|
|
pthread_in_libc=yes
|
|
|
|
# Iterate over all the sysdep directories we will use, running their
|
|
# configure fragments.
|
|
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)
|
|
. $dest/configure
|
|
fi
|
|
done
|
|
|
|
if test x"$build_mathvec" = xnotset; then
|
|
build_mathvec=no
|
|
fi
|
|
LIBC_CONFIG_VAR([build-mathvec], [$build_mathvec])
|
|
|
|
AC_SUBST(libc_extra_cflags)
|
|
AC_SUBST(libc_extra_cppflags)
|
|
|
|
if test x$libc_cv_gcc_unwind_find_fde = xyes; then
|
|
AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
|
|
fi
|
|
AC_SUBST(libc_cv_gcc_unwind_find_fde)
|
|
|
|
# A sysdeps configure fragment can reset this if IFUNC is not actually
|
|
# usable even though the assembler knows how to generate the symbol type.
|
|
if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then
|
|
AC_DEFINE(HAVE_IFUNC)
|
|
fi
|
|
LIBC_CONFIG_VAR([have-ifunc], [$libc_cv_ld_gnu_indirect_function])
|
|
|
|
if test x"$libc_cv_gcc_indirect_function" = xyes; then
|
|
AC_DEFINE(HAVE_GCC_IFUNC)
|
|
fi
|
|
LIBC_CONFIG_VAR([have-gcc-ifunc], [$libc_cv_gcc_indirect_function])
|
|
|
|
# This is far from the AC_ARG_ENABLE that sets it so that a sysdeps
|
|
# configure fragment can override the value to prevent this AC_DEFINE.
|
|
AC_SUBST(use_nscd)
|
|
if test "x$use_nscd" != xno; then
|
|
AC_DEFINE([USE_NSCD])
|
|
fi
|
|
if test "x$build_nscd" = xdefault; then
|
|
build_nscd=$use_nscd
|
|
fi
|
|
|
|
AC_SUBST(libc_cv_slibdir)
|
|
AC_SUBST(libc_cv_rtlddir)
|
|
AC_SUBST(libc_cv_complocaledir)
|
|
AC_SUBST(libc_cv_sysconfdir)
|
|
AC_SUBST(libc_cv_localstatedir)
|
|
AC_SUBST(libc_cv_rootsbindir)
|
|
|
|
if test x$use_ldconfig = xyes; then
|
|
AC_DEFINE(USE_LDCONFIG)
|
|
fi
|
|
AC_SUBST(use_ldconfig)
|
|
AC_SUBST(ldd_rewrite_script)
|
|
|
|
AC_SUBST(static)
|
|
AC_SUBST(shared)
|
|
|
|
AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
|
|
[libc_cv_pic_default=yes
|
|
cat > conftest.c <<EOF
|
|
#if defined __PIC__ || defined __pic__ || defined PIC || defined pic
|
|
# error PIC is default.
|
|
#endif
|
|
EOF
|
|
if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
|
|
libc_cv_pic_default=no
|
|
fi
|
|
rm -f conftest.*])
|
|
LIBC_CONFIG_VAR([build-pic-default], [$libc_cv_pic_default])
|
|
|
|
AC_CACHE_CHECK([whether -fPIE is default], libc_cv_cc_pie_default,
|
|
[libc_cv_cc_pie_default=yes
|
|
cat > conftest.c <<EOF
|
|
#if defined __PIE__ || defined __pie__ || defined PIE || defined pie
|
|
# error PIE is default.
|
|
#endif
|
|
EOF
|
|
if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
|
|
libc_cv_cc_pie_default=no
|
|
fi
|
|
rm -f conftest.*])
|
|
LIBC_CONFIG_VAR([cc-pie-default], [$libc_cv_cc_pie_default])
|
|
|
|
# Get Position Dependent Executable (PDE) load address to be used to
|
|
# load static Position Independent Executable (PIE) at a known working
|
|
# non-zero load address. This is only used by glibc tests to verify
|
|
# that PIE and static PIE with non-zero load address work correctly.
|
|
AC_CACHE_CHECK([PDE load address],
|
|
libc_cv_pde_load_address, [dnl
|
|
cat > conftest.S <<EOF
|
|
.globl _start
|
|
_start:
|
|
.globl __start
|
|
__start:
|
|
EOF
|
|
if test $libc_cv_cc_pie_default = yes; then
|
|
pde_ld_flags="-no-pie"
|
|
fi
|
|
if ${CC-cc} $pde_ld_flags $CFLAGS $CPPFLAGS $LDFLAGS \
|
|
-nostartfiles -nostdlib $no_ssp \
|
|
-o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
|
|
# Get the load address of the first PT_LOAD segment.
|
|
libc_cv_pde_load_address=$(LC_ALL=C $READELF -Wl conftest \
|
|
| $AWK '/LOAD/ { print $3; exit 0; }')
|
|
else
|
|
AC_MSG_ERROR([${CC-cc} can not create PDE])
|
|
fi
|
|
rm -f conftest*])
|
|
LIBC_CONFIG_VAR([pde-load-address], [$libc_cv_pde_load_address])
|
|
|
|
# Get the linker command-line option to load executable at a non-zero
|
|
# load address. This is only used by glibc tests to verify that PIE and
|
|
# static PIE with non-zero load address work correctly.
|
|
LIBC_LINKER_FEATURE([-Ttext-segment=$libc_cv_pde_load_address],
|
|
[-Wl,-Ttext-segment=$libc_cv_pde_load_address],
|
|
[libc_cv_load_address_ldflag=-Wl,-Ttext-segment],
|
|
[libc_cv_load_address_ldflag=])
|
|
LIBC_CONFIG_VAR([load-address-ldflag], [$libc_cv_load_address_ldflag])
|
|
|
|
AC_MSG_CHECKING(if we can build programs as PIE)
|
|
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifdef PIE_UNSUPPORTED
|
|
# error PIE is not supported
|
|
#endif]])], [libc_cv_pie_supported=yes], [libc_cv_pie_supported=no])
|
|
AC_MSG_RESULT($libc_cv_pie_supported)
|
|
# Disable build-pie-default if target does not support it or glibc is
|
|
# configured with --disable-default-pie.
|
|
if test "x$default_pie" = xno; then
|
|
build_pie_default=no
|
|
else
|
|
build_pie_default=$libc_cv_pie_supported
|
|
fi
|
|
LIBC_CONFIG_VAR([build-pie-default], [$build_pie_default])
|
|
|
|
AC_MSG_CHECKING(if we can build static PIE programs)
|
|
libc_cv_static_pie_supported=$libc_cv_pie_supported
|
|
if test "x$libc_cv_pie_supported" != xno \
|
|
-a "$libc_cv_no_dynamic_linker" = yes; then
|
|
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifndef SUPPORT_STATIC_PIE
|
|
# error static PIE is not supported
|
|
#endif]])], [libc_cv_static_pie_supported=yes],
|
|
[libc_cv_static_pie_supported=no])
|
|
fi
|
|
AC_MSG_RESULT($libc_cv_static_pie_supported)
|
|
|
|
# Enable static-pie only if it is available and glibc isn't configured
|
|
# with --disable-default-pie.
|
|
if test "x$default_pie" = xno; then
|
|
libc_cv_static_pie=no
|
|
else
|
|
libc_cv_static_pie=$libc_cv_static_pie_supported
|
|
fi
|
|
if test "$libc_cv_static_pie" = "yes"; then
|
|
AC_DEFINE(ENABLE_STATIC_PIE)
|
|
fi
|
|
LIBC_CONFIG_VAR([enable-static-pie], [$libc_cv_static_pie])
|
|
|
|
# Set the `multidir' variable by grabbing the variable from the compiler.
|
|
# We do it once and save the result in a generated makefile.
|
|
libc_cv_multidir=`${CC-cc} $CFLAGS $CPPFLAGS -print-multi-directory`
|
|
AC_SUBST(libc_cv_multidir)
|
|
|
|
AC_SUBST(profile)
|
|
AC_SUBST(static_nss)
|
|
|
|
AC_SUBST(DEFINES)
|
|
|
|
dnl See sysdeps/mach/configure.ac for this variable.
|
|
AC_SUBST(mach_interface_list)
|
|
|
|
VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
|
|
RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
|
|
AC_SUBST(VERSION)
|
|
AC_SUBST(RELEASE)
|
|
|
|
if test "$pthread_in_libc" = yes; then
|
|
AC_DEFINE(PTHREAD_IN_LIBC)
|
|
fi
|
|
AC_SUBST(pthread_in_libc)
|
|
|
|
AC_CONFIG_FILES([config.make Makefile])
|
|
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
|