mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 12:11:10 +00:00
97 lines
3.8 KiB
Plaintext
97 lines
3.8 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
|
|
# Local configure fragment for sysdeps/i386.
|
|
|
|
# CET is only supported for x86-64.
|
|
if test $enable_cet != no; then
|
|
as_fn_error $? "\"CET is only supported on x86_64 or x32\"" "$LINENO" 5
|
|
fi
|
|
|
|
# We no longer support i386 since it lacks the atomic instructions
|
|
# required to implement NPTL threading.
|
|
if test "$config_machine" = i386; then
|
|
as_fn_error $? "
|
|
*** ERROR: Support for i386 is deprecated.
|
|
*** Please use host i786, i686, i585 or i486.
|
|
*** For example: /src/glibc/configure --host=i686-pc-linux-gnu ...\"" "$LINENO" 5
|
|
fi
|
|
|
|
# The GNU C Library can't be built for i386. There are several reasons for
|
|
# this restriction. The primary reason is that i386 lacks the atomic
|
|
# operations required to support the current NPTL implementation. While it is
|
|
# possible that such atomic operations could be emulated in the kernel to date
|
|
# no such work has been done to enable this. Even with NPTL disabled you still
|
|
# have no atomic.h implementation. Given the declining use of i386 we disable
|
|
# support for building with `-march=i386' or `-mcpu=i386.' We don't explicitly
|
|
# check for i386, instead we make sure the compiler has support for inlining
|
|
# the builtin __sync_val_compare_and_swap. If it does then we should have no
|
|
# problem building for i386.
|
|
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for compiler support of inlined builtin function __sync_val_compare_and_swap" >&5
|
|
printf %s "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; }
|
|
libc_compiler_builtin_inlined=no
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
|
|
EOF
|
|
if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
|
|
-O0 -nostdlib -nostartfiles
|
|
-S conftest.c -o - | grep -F "__sync_val_compare_and_swap"
|
|
1>&5'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; }
|
|
then
|
|
libc_compiler_builtin_inlined=yes
|
|
fi
|
|
rm -f conftest*
|
|
if test $libc_compiler_builtin_inlined = yes; then
|
|
libc_cv_unsupported_i386=no
|
|
else
|
|
as_fn_error $? "
|
|
*** Building with -march=i386/-mcpu=i386 is not supported.
|
|
*** Please use host i786, i686, i586, or i486.
|
|
*** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ..." "$LINENO" 5
|
|
fi
|
|
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5
|
|
printf "%s\n" "$libc_compiler_builtin_inlined" >&6; }
|
|
|
|
if test "$static_pie" = yes; then
|
|
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for linker static PIE support" >&5
|
|
printf %s "checking for linker static PIE support... " >&6; }
|
|
if test ${libc_cv_ld_static_pie+y}
|
|
then :
|
|
printf %s "(cached) " >&6
|
|
else $as_nop
|
|
cat > conftest.s <<\EOF
|
|
.text
|
|
.global _start
|
|
_start:
|
|
movl _start@GOT(%ebx), %eax
|
|
EOF
|
|
libc_cv_pie_option="-Wl,-pie"
|
|
libc_cv_ld_static_pie=no
|
|
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostartfiles -nostdlib $no_ssp $libc_cv_pie_option -o conftest conftest.s 1>&5'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; }; then
|
|
if $READELF -r conftest | grep 'There are no relocations in this file.' > /dev/null; then
|
|
libc_cv_ld_static_pie=yes
|
|
fi
|
|
fi
|
|
rm -f conftest*
|
|
fi
|
|
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ld_static_pie" >&5
|
|
printf "%s\n" "$libc_cv_ld_static_pie" >&6; }
|
|
if test "$libc_cv_ld_static_pie" != yes; then
|
|
as_fn_error $? "linker support for static PIE needed" "$LINENO" 5
|
|
fi
|
|
fi
|
|
|
|
if test x"$multi_arch" != xno; then
|
|
printf "%s\n" "#define NO_HIDDEN_EXTERN_FUNC_IN_PIE 1" >>confdefs.h
|
|
|
|
fi
|
|
|