cb403c34c6
This patch removes the configure test for working -z relro.
The use of -z relro in Makeconfig became unconditional with
commit 2e6ab1df44c412bb9d30b26a4d8a679150a7e375
Author: Ulrich Drepper <drepper@redhat.com>
Date: Sat Oct 28 06:44:04 2006 +0000
Remove conditional code which now is unnecessary.
(commit reference from git://repo.or.cz/glibc/history), so since then
the configure test has not controlled anything about how glibc is
built - simply about whether configure succeeds and allows a build to
be attempted. The test for whether the option did something useful
(as opposed to whether it exists - which we can certainly just assume
by now) was originally added in
<https://sourceware.org/ml/libc-hacker/2004-09/msg00069.html> to
disable the option in a case when it did nothing useful on ia64 (as a
result of something deliberate in the linker on ia64). Since 2006
that disabling has been of no effect, and given that the current test
does not set libc_relro_required for ia64, it does nothing whatever
useful for the original motivating case. Also at around the same time
in 2006 the test was made to give an error for missing or broken -z
relro support on various architectures.
So effectively all the test does now is verify that, on certain
architectures, the linker has not been changed deliberately to make
the option ineffective. I see no apparent reason why such a change
should be expected, or why the build should be stopped if it were to
be made (any more than we disallow build on ia64); I think we can
trust binutils patch review to point out the consequences of any
change to COMMONPAGESIZE setting. The only thing that might now make
sense would be disabling the -z relro use on an architecture-specific
basis if there were an architecture-specific reason to consider that
to make sense; it would be for the ia64 maintainer to decide if that
makes sense for ia64 at present, but I think that could be done
through sysdeps Makefiles - no special configure tests needed.
Tested for x86_64 that this patch makes no change to the installed
shared libraries.
Together with
<https://sourceware.org/ml/libc-alpha/2014-06/msg00788.html> (pending
review) this substantially eliminates architecture-specific cases from
architecture-independent configure.ac files. There remains an i386
case in sysdeps/mach/hurd/configure.ac that should properly move to
the i386 subdirectory. (There are also OS-specific cases outside
OS-specific directories; in principle I think should should also
move.)
* configure.ac (libc_commonpagesize): Remove variable.
(libc_relro_required): Likewise.
(libc_cv_z_relro): Remove configure test.
* configure: Regenerated.
* sysdeps/aarch64/preconfigure (libc_commonpagesize): Do not set
variable.
(libc_relro_required): Likewise.
* sysdeps/alpha/preconfigure (libc_commonpagesize): Likewise.
(libc_relro_required): Likewise.
* sysdeps/arm/preconfigure.ac (libc_commonpagesize): Likewise.
(libc_relro_required): Likewise.
* sysdeps/arm/preconfigure: Regenerated.
* sysdeps/ia64/preconfigure: Remove file.
* sysdeps/tile/preconfigure (libc_commonpagesize): Do not set
variable.
(libc_relro_required): Likewise.
2018 lines
59 KiB
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2018 lines
59 KiB
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dnl Process this file with autoconf to produce a configure script.
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linux*)
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;;
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no) ;;
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dnl Let sysdeps/*/preconfigure act here, like they can in add-ons.
|
|
LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
|
|
|
|
# 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 "$libc_add_on"; then
|
|
LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for])
|
|
use_add_ons="$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-$host_os" in
|
|
*-linux* | *-gnu*)
|
|
;;
|
|
*)
|
|
echo "*** The GNU C library is currently not available for this platform."
|
|
echo "*** So far nobody cared to port it and if there is no volunteer it"
|
|
echo "*** might never happen. So, if you have interest to see glibc on"
|
|
echo "*** this platform visit"
|
|
echo "*** http://www.gnu.org/software/libc/porting.html"
|
|
echo "*** and join the group of porters"
|
|
exit 1
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
# Set base_machine if not set by a preconfigure fragment.
|
|
test -n "$base_machine" || base_machine=$machine
|
|
AC_SUBST(base_machine)
|
|
|
|
# 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 \
|
|
-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 $READELF -r conftest | grep 'no relocations' >/dev/null || {
|
|
libc_cv_ld_gnu_indirect_function=yes
|
|
}
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
AC_MSG_CHECKING(whether .text pseudo-op must be used)
|
|
AC_CACHE_VAL(libc_cv_dot_text, [dnl
|
|
cat > conftest.s <<EOF
|
|
.text
|
|
EOF
|
|
libc_cv_dot_text=
|
|
if AC_TRY_COMMAND(${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
|
|
|
|
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
|
|
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 $m
|
|
# Prepend the machine's FPU directory unless --without-fp.
|
|
if test "$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_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 $mach ''; do
|
|
for d in $add_ons_pfx ''; do
|
|
for a in $add_ons_sfx ''; do
|
|
try_suffix="$m0$b$v$o$m"
|
|
if test -n "$try_suffix"; then
|
|
try_srcdir="${srcdir}/"
|
|
case "$d" in
|
|
/*) try_srcdir= ;;
|
|
esac
|
|
try="${d}sysdeps$try_suffix$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
|
|
*"$multi_arch_d"*)
|
|
;;
|
|
*)
|
|
test x"$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
|
|
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 $implies_file $x try($d) {$try_srcdir}$try" >&2
|
|
if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
|
|
then
|
|
eval "${implies_type}=\"\$${implies_type} \$try\""
|
|
found=yes
|
|
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_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)
|
|
|
|
# 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
|
|
|
|
# Accept binutils 2.20 or newer.
|
|
AC_CHECK_PROG_VER(AS, $AS, --version,
|
|
[GNU assembler.* \([0-9]*\.[0-9.]*\)],
|
|
[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[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
|
|
|
|
# These programs are version sensitive.
|
|
AC_CHECK_TOOL_PREFIX
|
|
AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
|
|
[version \([egcygnustpi-]*[0-9.]*\)], [4.[4-9].* | 4.[1-9][0-9].* | [5-9].* ],
|
|
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]* | [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.[5-9]*|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="$critic_missing gawk")
|
|
|
|
AC_CHECK_TOOL(NM, nm, false)
|
|
|
|
if test "x$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="$aux_missing autoconf"
|
|
fi
|
|
else
|
|
AUTOCONF=no
|
|
fi
|
|
|
|
test -n "$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
|
|
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)
|
|
|
|
# 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 $CC -v -static-libgcc 2>&1 | grep 'unrecognized option.*static-libgcc' >/dev/null; then
|
|
libc_cv_gcc_static_libgcc=
|
|
else
|
|
libc_cv_gcc_static_libgcc=-static-libgcc
|
|
fi])
|
|
AC_SUBST(libc_cv_gcc_static_libgcc)
|
|
|
|
AC_PATH_PROG(BASH_SHELL, bash, no)
|
|
|
|
AC_PATH_PROG(PERL, perl, no)
|
|
if test "$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 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
|
|
.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 \
|
|
-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, %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 $libc_cv_asm_unique_object = yes; then
|
|
AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for .previous assembler directive,
|
|
libc_cv_asm_previous_directive, [dnl
|
|
cat > conftest.s <<EOF
|
|
.section foo_section
|
|
.previous
|
|
EOF
|
|
if AC_TRY_COMMAND(${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.{c,s}
|
|
])
|
|
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.s 1>&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
|
|
LIBC_TRY_LINK_STATIC([
|
|
int foo (void) { return 1; }
|
|
int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
|
|
],
|
|
[if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
|
|
libc_cv_initfini_array=yes
|
|
else
|
|
libc_cv_initfini_array=no
|
|
fi],
|
|
[libc_cv_initfini_array=no])
|
|
])
|
|
if test $libc_cv_initfini_array != yes; then
|
|
AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
|
|
fi
|
|
|
|
AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
|
|
libc_cv_ctors_header, [dnl
|
|
libc_cv_ctors_header=yes
|
|
LIBC_TRY_LINK_STATIC([
|
|
__attribute__ ((constructor)) void ctor (void) { asm (""); }
|
|
__attribute__ ((destructor)) void dtor (void) { asm (""); }
|
|
],
|
|
[dnl
|
|
AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
|
|
{ gsub(/\@<:@ */, "@<:@") }
|
|
$2 == ".ctors" || $2 == ".dtors" {
|
|
size = strtonum("0x" $6)
|
|
align = strtonum("0x" $NF)
|
|
seen@<:@$2@:>@ = 1
|
|
stub@<:@$2@:>@ = size == align * 2
|
|
}
|
|
END {
|
|
ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
|
|
dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
|
|
exit ((ctors_ok && dtors_ok) ? 0 : 1)
|
|
}
|
|
'], [libc_cv_ctors_header=no])
|
|
], [dnl
|
|
AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
|
|
])
|
|
])
|
|
if test $libc_cv_ctors_header = no; 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 ' -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 $libc_cv_cc_with_libunwind = yes; then
|
|
AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
|
|
fi
|
|
|
|
LIBC_LINKER_FEATURE([-z nodelete], [-Wl,--enable-new-dtags,-z,nodelete],
|
|
[libc_cv_z_nodelete=yes],
|
|
[AC_MSG_ERROR(linker with -z nodelete support required)])
|
|
|
|
LIBC_LINKER_FEATURE([-z nodlopen], [-Wl,--enable-new-dtags,-z,nodlopen],
|
|
[libc_cv_z_nodlopen=yes],
|
|
[AC_MSG_ERROR(linker with -z nodlopen support required)])
|
|
|
|
LIBC_LINKER_FEATURE([-z initfirst], [-Wl,--enable-new-dtags,-z,initfirst],
|
|
[libc_cv_z_initfirst=yes],
|
|
[AC_MSG_ERROR(linker with -z initfirst support required)])
|
|
|
|
AC_CACHE_CHECK(for -Bgroup option,
|
|
libc_cv_Bgroup, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 42; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-fPIC -shared -o conftest.so conftest.c
|
|
-Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_Bgroup=yes
|
|
else
|
|
libc_cv_Bgroup=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_Bgroup)
|
|
|
|
ASFLAGS_config=
|
|
AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
|
|
libc_cv_as_noexecstack, [dnl
|
|
cat > conftest.c <<EOF
|
|
void foo (void) { }
|
|
EOF
|
|
if AC_TRY_COMMAND([${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)
|
|
|
|
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 "$libc_cv_z_combreloc" = yes; then
|
|
AC_DEFINE(HAVE_Z_COMBRELOC)
|
|
fi
|
|
AC_SUBST(libc_cv_z_combreloc)
|
|
|
|
LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack],
|
|
[libc_cv_z_execstack=yes], [libc_cv_z_execstack=no])
|
|
AC_SUBST(libc_cv_z_execstack)
|
|
|
|
AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
|
|
LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no])
|
|
])
|
|
|
|
AC_SUBST(libc_cv_fpie)
|
|
|
|
AC_CACHE_CHECK(for --hash-style option,
|
|
libc_cv_hashstyle, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 42; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-fPIC -shared -o conftest.so conftest.c
|
|
-Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_hashstyle=yes
|
|
else
|
|
libc_cv_hashstyle=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_hashstyle)
|
|
|
|
# The linker's default -shared behavior is good enough if it
|
|
# does these things that our custom linker scripts ensure that
|
|
# all allocated NOTE sections come first.
|
|
if test "$use_default_link" = default; then
|
|
AC_CACHE_CHECK([for sufficient default -shared layout],
|
|
libc_cv_use_default_link, [dnl
|
|
libc_cv_use_default_link=no
|
|
cat > conftest.s <<\EOF
|
|
.section .note.a,"a",%note
|
|
.balign 4
|
|
.long 4,4,9
|
|
.string "GNU"
|
|
.string "foo"
|
|
.section .note.b,"a",%note
|
|
.balign 4
|
|
.long 4,4,9
|
|
.string "GNU"
|
|
.string "bar"
|
|
EOF
|
|
if AC_TRY_COMMAND([dnl
|
|
${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
|
|
ac_try=`$READELF -S conftest.so | sed -n \
|
|
['${x;p;}
|
|
s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
|
|
t a
|
|
b
|
|
: a
|
|
H']`
|
|
then
|
|
libc_seen_a=no libc_seen_b=no
|
|
set -- $ac_try
|
|
while test $# -ge 2 -a "$1" = NOTE; do
|
|
case "$2" in
|
|
.note.a) libc_seen_a=yes ;;
|
|
.note.b) libc_seen_b=yes ;;
|
|
esac
|
|
shift 2
|
|
done
|
|
case "$libc_seen_a$libc_seen_b" in
|
|
yesyes)
|
|
libc_cv_use_default_link=yes
|
|
;;
|
|
*)
|
|
echo >&AS_MESSAGE_LOG_FD "\
|
|
$libc_seen_a$libc_seen_b from:
|
|
$ac_try"
|
|
;;
|
|
esac
|
|
fi
|
|
rm -f conftest*])
|
|
use_default_link=$libc_cv_use_default_link
|
|
fi
|
|
|
|
AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
|
|
if libc_cv_output_format=`
|
|
${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
|
|
then
|
|
:
|
|
else
|
|
libc_cv_output_format=
|
|
fi
|
|
test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
|
|
AC_SUBST(libc_cv_output_format)
|
|
|
|
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 $libc_cv_fno_toplevel_reorder = yes; then
|
|
fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
|
|
else
|
|
fno_unit_at_a_time=-fno-unit-at-a-time
|
|
fi
|
|
AC_SUBST(fno_unit_at_a_time)
|
|
|
|
AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
|
|
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
|
|
[libc_cv_ssp=yes],
|
|
[libc_cv_ssp=no])
|
|
])
|
|
AC_SUBST(libc_cv_ssp)
|
|
|
|
AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
|
|
cat > conftest.c <<EOF
|
|
int foo;
|
|
#ifdef __GNUC_GNU_INLINE__
|
|
main () { return 0;}
|
|
#else
|
|
#error
|
|
#endif
|
|
EOF
|
|
if AC_TRY_COMMAND([${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)
|
|
|
|
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 assembler .weak directive, libc_cv_asm_weak_directive,
|
|
[dnl
|
|
cat > conftest.s <<EOF
|
|
${libc_cv_dot_text}
|
|
.globl foo
|
|
foo:
|
|
.weak foo
|
|
.weak bar; bar = foo
|
|
EOF
|
|
if AC_TRY_COMMAND(${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
|
|
${libc_cv_dot_text}
|
|
.globl foo
|
|
foo:
|
|
.weakext bar foo
|
|
.weakext baz
|
|
.globl baz
|
|
baz:
|
|
EOF
|
|
if AC_TRY_COMMAND(${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 $libc_cv_asm_weakext_directive = yes; then
|
|
AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
|
|
cat > conftest.c <<\EOF
|
|
_start () {}
|
|
int __eh_pc;
|
|
__throw () {}
|
|
EOF
|
|
dnl No \ in command here because it ends up inside ''.
|
|
if AC_TRY_COMMAND([${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 $libc_cv_ld_no_whole_archive = no; then
|
|
AC_MSG_ERROR([support for --no-whole-archive is needed])
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
|
|
cat > conftest.c <<\EOF
|
|
_start () {}
|
|
int __eh_pc;
|
|
__throw () {}
|
|
EOF
|
|
dnl No \ in command here because it ends up inside ''.
|
|
if AC_TRY_COMMAND([${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 $libc_cv_gcc_exceptions = yes; then
|
|
exceptions=-fexceptions
|
|
fi
|
|
AC_SUBST(exceptions)dnl
|
|
|
|
AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
|
|
cat > conftest.c <<\EOF
|
|
void zero (void *x)
|
|
{
|
|
__builtin_memset (x, 0, 1000);
|
|
}
|
|
EOF
|
|
dnl
|
|
if AC_TRY_COMMAND([${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 "$libc_cv_gcc_builtin_redirection" = no; then
|
|
AC_MSG_ERROR([support for the symbol redirection needed])
|
|
fi
|
|
|
|
dnl Check whether the compiler supports the __thread keyword.
|
|
AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
|
|
[cat > conftest.c <<\EOF
|
|
__thread int a = 42;
|
|
EOF
|
|
if AC_TRY_COMMAND([${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" = no; then
|
|
AC_MSG_ERROR([support for the __thread keyword is required])
|
|
fi
|
|
|
|
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" = no; then
|
|
AC_MSG_ERROR([support for the tls_model attribute is required])
|
|
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)
|
|
|
|
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 $libc_cv_cc_loop_to_function = yes; then
|
|
AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL)
|
|
fi
|
|
AC_SUBST(libc_cv_cc_loop_to_function)
|
|
|
|
dnl Check whether we have the gd library available.
|
|
AC_MSG_CHECKING(for libgd)
|
|
if test "$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)
|
|
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$have_libcap" = xyes; then
|
|
AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
|
|
fi
|
|
AC_SUBST(have_libcap)
|
|
fi
|
|
AC_SUBST(have_selinux)
|
|
|
|
dnl check for the size of 'long double'.
|
|
AC_CHECK_SIZEOF(long double, 0)
|
|
sizeof_long_double=$ac_cv_sizeof_long_double
|
|
AC_SUBST(sizeof_long_double)
|
|
|
|
CPPUNDEFS=
|
|
dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE.
|
|
dnl Since we are building the implementations of the fortified functions here,
|
|
dnl having the macro defined interacts very badly.
|
|
AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source,
|
|
[AC_TRY_COMPILE([], [
|
|
#ifdef _FORTIFY_SOURCE
|
|
# error bogon
|
|
#endif],
|
|
[libc_cv_predef_fortify_source=no],
|
|
[libc_cv_predef_fortify_source=yes])])
|
|
if test $libc_cv_predef_fortify_source = yes; then
|
|
CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE"
|
|
fi
|
|
AC_SUBST(CPPUNDEFS)
|
|
|
|
dnl Check for silly hacked compilers inserting -fstack-protector.
|
|
dnl This breaks badly for the early startup code we compile, since
|
|
dnl the compiled code can refer to a magic machine-dependent location
|
|
dnl for the canary value before we have sufficient setup for that to
|
|
dnl work. It's also questionable to build all of libc with this flag
|
|
dnl even when you're doing that for most applications you build, since
|
|
dnl libc's code is so heavily-used and performance-sensitive. If we
|
|
dnl ever really want to make that work, it should be enabled explicitly
|
|
dnl in the libc build, not inherited from implicit compiler settings.
|
|
AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector],
|
|
libc_cv_predef_stack_protector, [
|
|
AC_TRY_COMPILE([extern void foobar (char *);],
|
|
[char large_array[2048]; foobar (large_array);], [
|
|
libc_undefs=`$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'"
|
|
# On some architectures, there are architecture-specific undefined
|
|
# symbols (resolved by the linker), so filter out unknown symbols.
|
|
# This will fail to produce the correct result if the compiler
|
|
# defaults to -fstack-protector but this produces an undefined symbol
|
|
# other than __stack_chk_fail. However, compilers like that have not
|
|
# been encountered in practice.
|
|
libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'`
|
|
case "$libc_undefs" in
|
|
foobar) libc_cv_predef_stack_protector=no ;;
|
|
'__stack_chk_fail
|
|
foobar') libc_cv_predef_stack_protector=yes ;;
|
|
*) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;;
|
|
esac],
|
|
[AC_MSG_ERROR([test compilation failed])])
|
|
])
|
|
libc_extra_cflags=
|
|
if test $libc_cv_predef_stack_protector = yes; then
|
|
libc_extra_cflags="$libc_extra_cflags -fno-stack-protector"
|
|
fi
|
|
libc_extra_cppflags=
|
|
|
|
AC_CACHE_CHECK([whether the linker provides __ehdr_start],
|
|
libc_cv_ehdr_start, [
|
|
old_CFLAGS="$CFLAGS"
|
|
old_LDFLAGS="$LDFLAGS"
|
|
old_LIBS="$LIBS"
|
|
CFLAGS="$CFLAGS -fPIC"
|
|
LDFLAGS="$LDFLAGS -nostdlib -nostartfiles -shared"
|
|
LIBS=
|
|
AC_LINK_IFELSE([AC_LANG_SOURCE([
|
|
extern const char __ehdr_start __attribute__ ((visibility ("hidden")));
|
|
const char *ehdr (void) { return &__ehdr_start; }
|
|
])],
|
|
[libc_cv_ehdr_start=yes], [libc_cv_ehdr_start=no])
|
|
CFLAGS="$old_CFLAGS"
|
|
LDFLAGS="$old_LDFLAGS"
|
|
LIBS="$old_LIBS"
|
|
])
|
|
if test $libc_cv_ehdr_start = yes; then
|
|
AC_DEFINE([HAVE_EHDR_START])
|
|
fi
|
|
|
|
### End of automated tests.
|
|
### Now run sysdeps configure fragments.
|
|
|
|
# They also can set these variables.
|
|
use_ldconfig=no
|
|
ldd_rewrite_script=no
|
|
libc_cv_sysconfdir=$sysconfdir
|
|
libc_cv_localstatedir=$localstatedir
|
|
libc_cv_gcc_unwind_find_fde=no
|
|
libc_cv_idn=no
|
|
|
|
# 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)
|
|
. $dest/configure
|
|
fi
|
|
done
|
|
|
|
AC_SUBST(libc_extra_cflags)
|
|
AC_SUBST(libc_extra_cppflags)
|
|
|
|
if test x$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"$libc_cv_ld_gnu_indirect_function" = xyes; then
|
|
AC_DEFINE(HAVE_IFUNC)
|
|
fi
|
|
|
|
# This is far from the AC_ARG_ENABLE that sets it so that a sysdeps
|
|
# configure fragment can override the value to prevent this AC_DEFINE.
|
|
AC_SUBST(use_nscd)
|
|
if test "x$use_nscd" != xno; then
|
|
AC_DEFINE([USE_NSCD])
|
|
fi
|
|
if test "x$build_nscd" = xdefault; then
|
|
build_nscd=$use_nscd
|
|
fi
|
|
|
|
# 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 ${old_glibc_headers} = yes; then
|
|
AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
|
|
AC_MSG_WARN(*** be removed.)
|
|
fi
|
|
AC_SUBST(old_glibc_headers)
|
|
|
|
AC_SUBST(libc_cv_slibdir)
|
|
AC_SUBST(libc_cv_rtlddir)
|
|
AC_SUBST(libc_cv_localedir)
|
|
AC_SUBST(libc_cv_sysconfdir)
|
|
AC_SUBST(libc_cv_localstatedir)
|
|
AC_SUBST(libc_cv_rootsbindir)
|
|
AC_SUBST(libc_cv_forced_unwind)
|
|
|
|
if test x$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.*])
|
|
AC_SUBST(libc_cv_pic_default)
|
|
|
|
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)
|
|
|
|
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
|