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glibc/configure.in
H.J. Lu 4a531bb0b3 Remove .ctors' and .dtors' output sections
2010-12-24 20:14:37 -05:00

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dnl Process this file with autoconf to produce a configure script.
AC_REVISION([$CVSid$])
AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required.
AC_INIT([GNU C Library], [(see version.h)], [glibc])
AC_CONFIG_SRCDIR([include/features.h])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_AUX_DIR([scripts])
dnl This is here so we can set $subdirs directly based on configure fragments.
AC_CONFIG_SUBDIRS()
AC_CANONICAL_HOST
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
if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then
AC_MSG_ERROR([you must configure in a separate build directory])
fi
# This will get text that should go into config.make.
config_vars=
# Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
AC_ARG_WITH([gd],
AC_HELP_STRING([--with-gd=DIR],
[find libgd include dir and library with prefix DIR]),
[dnl
case "$with_gd" in
yes|''|no) ;;
*) libgd_include="-I$withval/include"
libgd_ldflags="-L$withval/lib" ;;
esac
])
AC_ARG_WITH([gd-include],
AC_HELP_STRING([--with-gd-include=DIR],
[find libgd include files in DIR]),
[dnl
case "$with_gd_include" in
''|no) ;;
*) libgd_include="-I$withval" ;;
esac
])
AC_ARG_WITH([gd-lib],
AC_HELP_STRING([--with-gd-lib=DIR],
[find libgd library files in DIR]),
[dnl
case "$with_gd_lib" in
''|no) ;;
*) libgd_ldflags="-L$withval" ;;
esac
])
if test -n "$libgd_include"; then
config_vars="$config_vars
CFLAGS-memusagestat.c = $libgd_include"
fi
if test -n "$libgd_ldflags"; then
config_vars="$config_vars
libgd-LDFLAGS = $libgd_ldflags"
fi
dnl Arguments to specify presence of other packages/features.
AC_ARG_WITH([fp],
AC_HELP_STRING([--with-fp],
[if using floating-point hardware @<:@default=yes@:>@]),
[with_fp=$withval],
[with_fp=yes])
AC_SUBST(with_fp)
AC_ARG_WITH([binutils],
AC_HELP_STRING([--with-binutils=PATH],
[specify location of binutils (as and ld)]),
[path_binutils=$withval],
[path_binutils=''])
AC_ARG_WITH([elf],
AC_HELP_STRING([--with-elf],
[if using the ELF object format]),
[elf=$withval],
[elf=no])
AC_ARG_WITH([selinux],
AC_HELP_STRING([--with-selinux],
[if building with SELinux support]),
[with_selinux=$withval],
[with_selinux=auto])
AC_ARG_WITH([xcoff],
AC_HELP_STRING([--with-xcoff],
[if using the XCOFF object format]),
[xcoff=$withval],
[xcoff=no])
AC_ARG_WITH([cvs],
AC_HELP_STRING([--without-cvs],
[if CVS should not be used]),
[with_cvs=$withval],
[with_cvs=yes])
if test "$with_cvs" = yes; then
if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null
then
with_cvs=no
fi
fi
AC_SUBST(with_cvs)
AC_ARG_WITH([headers],
AC_HELP_STRING([--with-headers=PATH],
[location of system headers to use
(for example /usr/src/linux/include)
@<:@default=compiler default@:>@]),
[sysheaders=$withval],
[sysheaders=''])
AC_ARG_ENABLE([sanity-checks],
AC_HELP_STRING([--disable-sanity-checks],
[really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
[enable_sanity=$enableval],
[enable_sanity=yes])
AC_SUBST(enable_check_abi)
AC_ARG_ENABLE([check-abi],
AC_HELP_STRING([--enable-check-abi],
[do "make check-abi" in "make check" (no/warn/yes)
@<:@default=no@:>@]),
[enable_check_abi=$enableval],
[enable_check_abi=no])
dnl Arguments to enable or disable building the static, shared, profiled,
dnl and -fomit-frame-pointer libraries.
dnl I've disabled this for now since we cannot build glibc without static
dnl libraries built in the moment.
dnl AC_ARG_ENABLE([static],
dnl AC_HELP_STRING([--enable-static],
dnl [build static library @<:@default=yes@:>@]),
dnl [static=$enableval],
dnl [static=yes])
static=yes
AC_ARG_ENABLE([shared],
AC_HELP_STRING([--enable-shared],
[build shared library @<:@default=yes if GNU ld & ELF@:>@]),
[shared=$enableval],
[shared=default])
AC_ARG_ENABLE([profile],
AC_HELP_STRING([--enable-profile],
[build profiled library @<:@default=no@:>@]),
[profile=$enableval],
[profile=no])
AC_ARG_ENABLE([omitfp],
AC_HELP_STRING([--enable-omitfp],
[build undebuggable optimized library @<:@default=no@:>@]),
[omitfp=$enableval],
[omitfp=no])
AC_ARG_ENABLE([bounded],
AC_HELP_STRING([--enable-bounded],
[build with runtime bounds checking @<:@default=no@:>@]),
[bounded=$enableval],
[bounded=no])
AC_ARG_ENABLE([versioning],
AC_HELP_STRING([--disable-versioning],
[do not include versioning information in the library objects @<:@default=yes if supported@:>@]),
[enable_versioning=$enableval],
[enable_versioning=yes])
AC_ARG_ENABLE([oldest-abi],
AC_HELP_STRING([--enable-oldest-abi=ABI],
[configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]),
[oldest_abi=$enableval],
[oldest_abi=no])
if test "$oldest_abi" = yes || test "$oldest_abi" = no; then
oldest_abi=default
else
AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
fi
AC_SUBST(oldest_abi)
AC_ARG_ENABLE([stackguard-randomization],
AC_HELP_STRING([--enable-stackguard-randomization],
[initialize __stack_chk_guard canary with a random number at program start]),
[enable_stackguard_randomize=$enableval],
[enable_stackguard_randomize=no])
if test "$enable_stackguard_randomize" = yes; then
AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
fi
dnl Generic infrastructure for drop-in additions to libc.
AC_ARG_ENABLE([add-ons],
AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
[configure and build add-ons in DIR1,DIR2,...
search for add-ons if no parameter given]),
, [enable_add_ons=yes])
dnl Let the user avoid using TLS. Don't know why but...
AC_ARG_WITH([tls],
AC_HELP_STRING([--with-tls],
[enable support for TLS]),
[usetls=$withval],
[usetls=yes])
AC_ARG_WITH([__thread],
AC_HELP_STRING([--without-__thread],
[do not use TLS features even when supporting them]),
[use__thread=$withval],
[use__thread=yes])
AC_ARG_ENABLE([hidden-plt],
AC_HELP_STRING([--disable-hidden-plt],
[do not hide internal function calls to avoid PLT]),
[hidden=$enableval],
[hidden=yes])
if test "x$hidden" = xno; then
AC_DEFINE(NO_HIDDEN)
fi
AC_ARG_ENABLE([bind-now],
AC_HELP_STRING([--enable-bind-now],
[disable lazy relocations in DSOs]),
[bindnow=$enableval],
[bindnow=no])
AC_SUBST(bindnow)
dnl On some platforms we cannot use dynamic loading. We must provide
dnl static NSS modules.
AC_ARG_ENABLE([static-nss],
AC_HELP_STRING([--enable-static-nss],
[build static NSS modules @<:@default=no@:>@]),
[static_nss=$enableval],
[static_nss=no])
dnl Enable static NSS also if we build no shared objects.
if test x"$static_nss" = xyes || test x"$shared" = xno; then
static_nss=yes
AC_DEFINE(DO_STATIC_NSS)
fi
AC_ARG_ENABLE([force-install],
AC_HELP_STRING([--disable-force-install],
[don't force installation of files from this package, even if they are older than the installed files]),
[force_install=$enableval],
[force_install=yes])
AC_SUBST(force_install)
dnl On some platforms we allow dropping compatibility with all kernel
dnl versions.
AC_ARG_ENABLE([kernel],
AC_HELP_STRING([--enable-kernel=VERSION],
[compile for compatibility with kernel not older than VERSION]),
[minimum_kernel=$enableval],
[])
dnl Prevent unreasonable values.
if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
# Better nothing than this.
minimum_kernel=""
else
if test "$minimum_kernel" = current; then
minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
fi
fi
dnl For the development we sometimes want gcc to issue even more warnings.
dnl This is not the default since many of the extra warnings are not
dnl appropriate.
AC_ARG_ENABLE([all-warnings],
AC_HELP_STRING([--enable-all-warnings],
[enable all useful warnings gcc can issue]),
[all_warnings=$enableval],
[])
AC_SUBST(all_warnings)
AC_ARG_ENABLE([multi-arch],
AC_HELP_STRING([--enable-multi-arch],
[enable single DSO with optimizations for multiple architectures]),
[multi_arch=$enableval],
[multi_arch=default])
AC_ARG_ENABLE([experimental-malloc],
AC_HELP_STRING([--enable-experimental-malloc],
[enable experimental malloc features]),
[experimental_malloc=$enableval],
[])
AC_SUBST(experimental_malloc)
AC_ARG_ENABLE([nss-crypt],
AC_HELP_STRING([--enable-nss-crypt],
[enable libcrypt to use nss]),
[nss_crypt=$enableval],
[nss_crypt=no])
if test x$nss_crypt = xyes; then
nss_includes=-I$(nss-config --includedir 2>/dev/null)
if test $? -ne 0; then
AC_MSG_ERROR([cannot find include directory with nss-config])
fi
old_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $nss_includes"
AC_COMPILE_IFELSE([typedef int PRBool;
#include <hasht.h>
#include <nsslowhash.h>
void f (void) { NSSLOW_Init (); }],
libc_cv_nss_crypt=yes,
AC_MSG_ERROR([
cannot find NSS headers with lowlevel hash function interfaces]))
old_LIBS="$LIBS"
LIBS="$LIBS -lfreebl3"
AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
#include <hasht.h>
#include <nsslowhash.h>],
[NSSLOW_Init();])],
libc_cv_nss_crypt=yes,
AC_MSG_ERROR([
cannot link program using lowlevel NSS hash functions]))
CFLAGS="$old_CFLAGS"
LIBS="$old_LIBS"
else
libc_cv_nss_crypt=no
fi
AC_SUBST(libc_cv_nss_crypt)
# The way shlib-versions is used to generate soversions.mk uses a
# fairly simplistic model for name recognition that can't distinguish
# i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
# of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
# tell. This doesn't get used much beyond that, so it's fairly safe.
case "$host_os" in
linux*)
;;
gnu*)
host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
;;
esac
# We keep the original values in `$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 $config_os | sed 's/^unknown-//'`"
# Some configurations imply other options.
case "$host_os" in
# i586-linuxaout is mangled into i586-pc-linux-gnuaout
linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
;;
gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*)
# These systems (almost) always use the ELF format.
elf=yes
;;
aix*)
# These systems are always xcoff
xcoff=yes
elf=no
;;
esac
# The configure fragment of an add-on 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=$config_os
base_os=''
# config.guess on some IBM machines says `rs6000' instead of `powerpc'.
# Unify this here.
if test "$machine" = rs6000; then
machine="powerpc"
fi
# Braindead PowerPC box with absolutely no FPU.
case "$machine-$host_os" in
powerpc*-*soft)
with_fp=no
;;
esac
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 add-on can set this when it wants to disable the sanity check below.
libc_config_ok=no
dnl Having this here, though empty, makes sure that if add-ons' fragments
dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
dnl our AC_OUTPUT will actually use it.
AC_CONFIG_SUBDIRS()
case "$enable_add_ons" in
''|no) add_ons= ;;
yes|'*')
add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
sed 's@/[[^/]]*$@@' | sort | uniq`
add_ons_automatic=yes
;;
*) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
add_ons_automatic=no ;;
esac
configured_add_ons=
add_ons_sfx=
add_ons_pfx=
if test x"$add_ons" != x; then
for f in $add_ons; do
# Some sanity checks
case "$f" in
crypt)
AC_MSG_ERROR([
*** It seems that you're using an old \`crypt' add-on. crypt is now
*** part of glibc and using the old add-on will not work with this
*** release. Start again with fresh sources and without the old
*** \`crypt' add-on.])
;;
localedata)
AC_MSG_ERROR([
*** It seems that you're using an old \`localedata' add-on. localedata
*** is now part of glibc and using the old add-on will not work with
*** this release. Start again with fresh sources and without the old
*** \`localedata' add-on.])
;;
esac
done
# Now source each add-on's configure fragment.
# The fragments can use $srcdir/$libc_add_on to find themselves,
# and test $add_ons_automatic to see if they were explicitly requested.
# A fragment can clear (or even change) $libc_add_on to affect
# whether it goes into the list to be actually used in the build.
use_add_ons=
for libc_add_on in $add_ons; do
# Test whether such a directory really exists.
# It can be absolute, or relative to $srcdir, or relative to the build dir.
case "$libc_add_on" in
/*)
libc_add_on_srcdir=$libc_add_on
;;
*)
test -d "$srcdir/$libc_add_on" || {
if test -d "$libc_add_on"; then
libc_add_on="`pwd`/$libc_add_on"
else
AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
fi
}
libc_add_on_srcdir=$srcdir/$libc_add_on
;;
esac
libc_add_on_frag=$libc_add_on_srcdir/configure
libc_add_on_canonical=
libc_add_on_config_subdirs=
if test -r "$libc_add_on_frag"; then
AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
libc_add_on_canonical=unknown
libc_add_on_subdirs=
. "$libc_add_on_frag"
test -z "$libc_add_on" || {
configured_add_ons="$configured_add_ons $libc_add_on"
if test "x$libc_add_on_canonical" = xunknown; then
AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
fi
for d in $libc_add_on_subdirs; do
case "$libc_add_on" in
/*) subdir_srcdir="$libc_add_on" ;;
*) subdir_srcdir="\$(..)$libc_add_on" ;;
esac
case "$d" in
.)
d="${libc_add_on_canonical:-$libc_add_on}"
;;
/*)
subdir_srcdir="$d"
;;
*)
subdir_srcdir="$subdir_srcdir/$d"
;;
esac
d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
add_on_subdirs="$add_on_subdirs $d"
test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
$d-srcdir = $subdir_srcdir"
done
for d in $libc_add_on_config_subdirs; do
case "$d" in
/*) AC_MSG_ERROR(dnl
fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
esac
if test ! -d "$libc_add_on_srcdir/$d"; then
AC_MSG_ERROR(fragment wants to configure missing directory $d)
fi
case "$libc_add_on" in
/*) AC_MSG_ERROR(dnl
relative path required for add-on using \$libc_add_on_config_subdirs) ;;
esac
subdirs="$subdirs $libc_add_on/$d"
done
}
fi
if test -n "$libc_add_on"; then
if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null`
then
AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments)
for frag in $frags; do
name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'`
echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
. "$frag"
done
AC_MSG_RESULT()
fi
use_add_ons="$use_add_ons $libc_add_on"
add_ons_pfx="$add_ons_pfx $libc_add_on/"
test -z "$libc_add_on_canonical" ||
add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
fi
done
# Use echo to strip excess whitespace.
add_ons="`echo $use_add_ons`"
fi
AC_SUBST(add_ons)
AC_SUBST(add_on_subdirs)
###
### I put this here to prevent those annoying emails from people who cannot
### read and try to compile glibc on unsupported platforms. --drepper
###
### By using the undocumented --enable-hacker-mode option for configure
### one can skip this test to make the configuration not fail for unsupported
### platforms.
###
if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
case "$machine-$host_os" in
*-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*)
;;
*)
echo "*** The GNU C library is currently not available for this platform."
echo "*** So far nobody cared to port it and if there is no volunteer it"
echo "*** might never happen. So, if you have interest to see glibc on"
echo "*** this platform visit"
echo "*** http://www.gnu.org/software/libc/porting.html"
echo "*** and join the group of porters"
exit 1
;;
esac
fi
dnl We need to use [ and ] for other purposes for a while now.
changequote(,)dnl
# Expand the configuration machine name into a subdirectory by architecture
# type and particular chip. If an add-on configure fragment already set
# base_machine, we don't change it.
test -n "$base_machine" || case "$machine" in
a29k | am29000) base_machine=a29k machine=a29k ;;
c3[012]) base_machine=cx0 machine=cx0/c30 ;;
c4[04]) base_machine=cx0 machine=cx0/c40 ;;
i[34567]86) base_machine=i386 machine=i386/$machine ;;
ia64) base_machine=ia64 machine=ia64 ;;
m88???) base_machine=m88k machine=m88k/$machine ;;
m88k) base_machine=m88k machine=m88k/m88100 ;;
powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;;
powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;;
s390) base_machine=s390 machine=s390/s390-32 ;;
s390x) base_machine=s390 machine=s390/s390-64 ;;
sh3*) base_machine=sh machine=sh/sh3 ;;
sh4*) base_machine=sh machine=sh/sh4 ;;
sparc | sparcv[67])
base_machine=sparc machine=sparc/sparc32 ;;
sparcv8 | supersparc | hypersparc)
base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
sparcv8plus | sparcv8plusa | sparcv9)
base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
sparcv8plusb | sparcv9b)
base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;;
sparcv9v)
base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;;
sparcv9v2)
base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;;
sparc64)
base_machine=sparc machine=sparc/sparc64 ;;
sparc64b)
base_machine=sparc machine=sparc/sparc64/sparcv9b ;;
sparc64v)
base_machine=sparc machine=sparc/sparc64/sparcv9v ;;
sparc64v2)
base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;;
*) base_machine=$machine ;;
esac
changequote([,])dnl
AC_SUBST(base_machine)
if test "$base_machine" = "i386"; then
AC_DEFINE(USE_REGPARMS)
fi
# For the multi-arch option we need support in the assembler.
AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type support],
libc_cv_asm_gnu_indirect_function, [dnl
cat > conftest.s <<EOF
.type foo,%gnu_indirect_function
EOF
if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD;
then
libc_cv_asm_gnu_indirect_function=yes
else
libc_cv_asm_gnu_indirect_function=no
fi
rm -f conftest*])
AC_MSG_CHECKING(whether .text pseudo-op must be used)
AC_CACHE_VAL(libc_cv_dot_text, [dnl
cat > conftest.s <<EOF
.text
EOF
libc_cv_dot_text=
if AC_TRY_COMMAND(${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 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, ${libc_cv_asm_type_prefix})
fi
if test x"$libc_cv_asm_gnu_indirect_function" != xyes -a x"$libc_cv_asm_type_prefix" = xno; then
if test x"$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"$multi_arch" != xno; then
multi_arch_d=/multiarch
fi
# Compute the list of sysdep directories for this configuration.
# This can take a while to compute.
sysdep_dir=$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 ;;
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 ;;
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 $m
# Prepend the machine's FPU directory unless --without-fp.
if test "$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_add_ons=
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 $multi_arch_d $mach ''; do
for d in $add_ons_pfx ''; do
for a in $add_ons_sfx ''; do
if test -n "$m0$m0sub$b$v$o$m$msub"; then
try_srcdir="${srcdir}/"
case "$d" in
/*) try_srcdir= ;;
esac
try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a"
test -n "$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
if test -n "$d"; then
case "$sysnames_add_ons" in
*" $d "*) ;;
*|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
esac
fi
fi
fi
done
done
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 $sysnames_add_ons$sysnames in
*"$multi_arch_d"*)
;;
*)
multi_arch=no
;;
esac
if test x"$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 $host_cpu is not supported.)
fi
AC_SUBST(submachine)
# We have now validated the configuration.
# If using ELF, look for an `elf' subdirectory of each machine directory.
# We prepend these rather than inserting them whereever the machine appears
# because things specified by the machine's ELF ABI should override
# OS-specific things, and should always be the same for any OS on the
# machine (otherwise what's the point of an ABI?).
if test "$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 $try"
found=yes
case "$sysnames_add_ons" in
*" $d "*) ;;
*|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
esac
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)
# Collect the list of add-ons that supply partial sysdeps trees.
sysdeps_add_ons=
for add_on in $add_ons; do
case "$add_on" in
/*) xsrcdir= ;;
*) xsrcdir="$srcdir/" ;;
esac
test -d "$xsrcdir$add_on/sysdeps" || {
case "$configured_add_ons " in
*" $add_on "*) ;;
*|'')
AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
;;
esac
continue
}
sysdeps_add_ons="$sysdeps_add_ons $add_on"
case "$sysnames_add_ons" in
*" $add_on/ "*) ;;
*|'')
AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
continue ;;
esac
found=no
for d in $sysnames; do
case "$d" in
$add_on/sysdeps/*) ;;
*) continue ;;
esac
(cd "$xsrcdir$d" && for f in *[[!~]]; do
case "$f" in
sys|bits)
for ff in $f/*.h; do
test -d "$ff" || { test -e "$ff" && exit 88; }
done
;;
*)
test -d "$f" || { test -e "$f" && exit 88; }
;;
esac
done)
if test $? -eq 88; then
found=yes
break
fi
done
if test $found = no; then
AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
fi
done
AC_SUBST(sysdeps_add_ons)
### Locate tools.
AC_PROG_INSTALL
if test "$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
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]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], 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]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], 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 \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
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 "$sysheaders"; then
SYSINCLUDES=-nostdinc
for d in include include-fixed; do
i=`$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
cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` &&
cxxheaders=`$CXX -print-file-name=../../../../include/c++/`"$cxxversion" &&
CXX_SYSINCLUDES="-isystem $cxxheaders \
-isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward"
fi
fi
AC_SUBST(SYSINCLUDES)
AC_SUBST(CXX_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 $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
libc_cv_gcc_static_libgcc=
else
libc_cv_gcc_static_libgcc=-static-libgcc
fi])
AC_SUBST(libc_cv_gcc_static_libgcc)
AC_PATH_PROG(BASH_SHELL, bash, no)
if test "$BASH_SHELL" != no &&
$BASH_SHELL -c 'test "$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_SHELL" = 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_SHELL"
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_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 gnu_unique_object symbol type,
libc_cv_asm_unique_object, [dnl
cat > conftest.s <<EOF
${libc_cv_dot_text}
_sym:
.type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
EOF
if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
libc_cv_asm_unique_object=yes
else
libc_cv_asm_unique_object=no
fi
rm -f conftest*])
if test $libc_cv_asm_unique_object = yes; then
AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
fi
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
AC_MSG_ERROR(assembler support for symbol visibility is required)
fi
rm -f conftest*])
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_MSG_ERROR(compiler support for visibility attribute is required)
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 $libc_cv_broken_visibility_attribute = yes; then
AC_MSG_ERROR(working compiler support for visibility attribute is required)
fi
fi
AC_CACHE_CHECK(for broken __attribute__((alias())),
libc_cv_broken_alias_attribute,
[cat > conftest.c <<EOF
extern int foo (int x) __asm ("xyzzy");
int bar (int x) { return x; }
extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
extern int dfoo;
extern __typeof (dfoo) dfoo __asm ("abccb");
int dfoo = 1;
EOF
libc_cv_broken_alias_attribute=yes
if AC_TRY_COMMAND(${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_MSG_ERROR(working alias attribute support required)
fi
if test $libc_cv_visibility_attribute = 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 -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 $libc_cv_have_sdata_section = yes; then
AC_DEFINE(HAVE_SDATA_SECTION)
fi
fi
AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
libc_cv_initfini_array, [dnl
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
int foo (void) { return 1; }
int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
EOF
if AC_TRY_COMMAND([${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_initfini_array=yes
else
libc_cv_initfini_array=no
fi
else
libc_cv_initfini_array=no
fi
rm -f conftest*])
if test $libc_cv_initfini_array != yes; then
AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
elif AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep SORT_BY_INIT_PRIORITY 1>&AS_MESSAGE_LOG_FD]); then
AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
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 -q " -lunwind "; 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 $libc_cv_cc_with_libunwind = yes; then
AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
fi
AC_CACHE_CHECK(for -z nodelete option,
libc_cv_z_nodelete, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-fPIC -shared -o conftest.so conftest.c
-nostartfiles -nostdlib
-Wl,--enable-new-dtags,-z,nodelete 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_z_nodelete=yes
else
AC_MSG_ERROR(linker with -z nodelete support required)
fi
rm -f conftest*])
AC_CACHE_CHECK(for -z nodlopen option,
libc_cv_z_nodlopen, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-fPIC -shared -o conftest.so conftest.c
-nostartfiles -nostdlib
-Wl,--enable-new-dtags,-z,nodlopen 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_z_nodlopen=yes
else
AC_MSG_ERROR(linker with -z nodlopen support required)
fi
rm -f conftest*])
AC_CACHE_CHECK(for -z initfirst option,
libc_cv_z_initfirst, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-fPIC -shared -o conftest.so conftest.c
-nostartfiles -nostdlib
-Wl,--enable-new-dtags,-z,initfirst 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_z_initfirst=yes
else
AC_MSG_ERROR(linker with -z initfirst support required)
fi
rm -f conftest*])
case "$base_machine" in
changequote(,)dnl
i[34567]86 | x86_64 | powerpc* | s390* | sparc* | alpha*)
changequote([,])dnl
AC_CACHE_CHECK(for -z relro option,
libc_cv_z_relro, [dnl
libc_cv_z_relro=no
if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD])
then
if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_z_relro=yes
fi
fi])
if test "$libc_cv_z_relro" = no; then
AC_MSG_ERROR(linker with -z relro support required)
fi
;;
*) ;;
esac
AC_CACHE_CHECK(for -Bgroup option,
libc_cv_Bgroup, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-fPIC -shared -o conftest.so conftest.c
-Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_Bgroup=yes
else
libc_cv_Bgroup=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_Bgroup)
AC_CACHE_CHECK(for libgcc_s suffix,
libc_cv_libgcc_s_suffix, [dnl
cat > conftest.c <<EOF
int main (void) { return 0; }
EOF
changequote(,)dnl
libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
-fPIC -shared -shared-libgcc -o conftest.so \
conftest.c -v 2>&1 >/dev/null \
| sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
changequote([,])dnl
rm -f conftest*])
AC_SUBST(libc_cv_libgcc_s_suffix)
AC_CACHE_CHECK(for --as-needed option,
libc_cv_as_needed, [dnl
cat > conftest.c <<EOF
int main (void) { return 0; }
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-fPIC -shared -o conftest.so conftest.c
-lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
-nostdlib 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_as_needed=yes
else
libc_cv_as_needed=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_as_needed)
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} $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)
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
-fPIC -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 $LDFLAGS
-fPIC -shared -o conftest.so conftest.c
-Wl,-z,execstack -nostdlib
1>&AS_MESSAGE_LOG_FD])
then
libc_cv_z_execstack=yes
else
libc_cv_z_execstack=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_z_execstack)
AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
cat > conftest.c <<EOF
int foo;
main () { return 0;}
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -fpie
-o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_fpie=yes
else
libc_cv_fpie=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_fpie)
AC_CACHE_CHECK(for --hash-style option,
libc_cv_hashstyle, [dnl
cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-fPIC -shared -o conftest.so conftest.c
-Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_hashstyle=yes
else
libc_cv_hashstyle=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_hashstyle)
fi
AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
cat > conftest.c <<EOF
int foo;
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
conftest.c 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_fno_toplevel_reorder=yes
else
libc_cv_fno_toplevel_reorder=no
fi
rm -f conftest*])
if test $libc_cv_fno_toplevel_reorder = yes; then
fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
else
fno_unit_at_a_time=-fno-unit-at-a-time
fi
AC_SUBST(fno_unit_at_a_time)
AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
cat > conftest.c <<EOF
int foo;
main () { return 0;}
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
-o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_ssp=yes
else
libc_cv_ssp=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_ssp)
AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
cat > conftest.c <<EOF
int foo;
#ifdef __GNUC_GNU_INLINE__
main () { return 0;}
#else
#error
#endif
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline
-o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD])
then
libc_cv_gnu89_inline=yes
else
libc_cv_gnu89_inline=no
fi
rm -f conftest*])
if test $libc_cv_gnu89_inline = yes; then
gnu89_inline=-fgnu89-inline
else
gnu89_inline=
fi
AC_SUBST(gnu89_inline)
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; 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
AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl
case $machine in
sparc/sparc64*) cfi_offset=2047;;
*) cfi_offset=0;;
esac
cat > conftest.s <<EOF
.text
.type func,%function
func:
.cfi_startproc
.cfi_remember_state
.cfi_rel_offset 1, $cfi_offset
.cfi_endproc
EOF
if AC_TRY_COMMAND(${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 $libc_cv_asm_cfi_directives = yes; then
AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES)
fi
AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
cat > conftest.c <<\EOF
_start () {}
int __eh_pc;
__throw () {}
EOF
dnl No \ in command here because it ends up inside ''.
if AC_TRY_COMMAND([${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
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 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
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=$submachine"; do
if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
libc_cv_cc_submachine="$opt"
break
fi
done])
if test "x$libc_cv_cc_submachine" = xno; then
AC_MSG_ERROR([${CC-cc} does not support $submachine])
fi
fi
AC_SUBST(libc_cv_cc_submachine)
dnl Check whether we have the gd library available.
AC_MSG_CHECKING(for libgd)
if test "$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($LIBGD)
AC_SUBST(LIBGD)
# SELinux detection
if test x$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)
# See if we have the SELinux header with the NSCD permissions in it.
if test x$have_selinux = xyes ; then
AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h])
AC_TRY_COMPILE([#include <selinux/av_permissions.h>],
[#ifdef NSCD__SHMEMHOST
return 0;
#else
#error NSCD__SHMEMHOST not defined
#endif],
have_selinux=yes, have_selinux=no)
AC_MSG_RESULT($have_selinux)
fi
if test x$with_selinux = xyes ; then
if test x$have_selinux = xno ; then
AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent 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$have_libcap" = xyes; then
AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
fi
AC_SUBST(have_libcap)
fi
AC_SUBST(have_selinux)
dnl check for the size of 'long double'.
AC_CHECK_SIZEOF(long double, 0)
sizeof_long_double=$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
libc_cv_idn=no
# 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)
. $dest/configure
fi
done
if test x$libc_cv_gcc_unwind_find_fde = xyes; then
AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
fi
AC_SUBST(libc_cv_gcc_unwind_find_fde)
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)
dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
AC_SUBST(libc_cv_cpp_asm_debuginfo)
AC_SUBST(libc_cv_cc_sse4)
AC_SUBST(libc_cv_cc_avx)
AC_SUBST(libc_cv_as_i686)
AC_SUBST(use_ldconfig)
AC_SUBST(ldd_rewrite_script)
AC_SUBST(elf) AC_SUBST(xcoff)
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 $shared = default; then
shared=$elf
fi
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.*])
AC_SUBST(libc_cv_pic_default)
AC_SUBST(profile)
AC_SUBST(omitfp)
AC_SUBST(bounded)
AC_SUBST(static_nss)
AC_SUBST(nopic_initfini)
AC_SUBST(DEFINES)
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}])
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
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