mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 04:50:07 +00:00
91bcb95ad4
There are configure tests for the cpuid.h header for x86 / x86_64. GCC 4.3 and later install this header, so those tests are obsolete. This patch removes them. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * sysdeps/i386/configure.ac (cpuid.h): Do not test for header. * sysdeps/i386/configure: Regenerated. * sysdeps/x86_64/configure.ac (cpuid.h): Do not test for header. * sysdeps/x86_64/configure: Regenerated.
85 lines
3.2 KiB
Plaintext
85 lines
3.2 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
|
|
# Local configure fragment for sysdeps/i386.
|
|
|
|
# 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.
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler support of inlined builtin function __sync_val_compare_and_swap" >&5
|
|
$as_echo_n "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; }
|
|
libc_compiler_builtin_inlined=no
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
|
|
EOF
|
|
if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-O0 -nostdlib -nostartfiles
|
|
-S conftest.c -o - | fgrep "__sync_val_compare_and_swap"
|
|
1>&5'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
$as_echo "$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
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5
|
|
$as_echo "$libc_compiler_builtin_inlined" >&6; }
|
|
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for Intel MPX support" >&5
|
|
$as_echo_n "checking for Intel MPX support... " >&6; }
|
|
if ${libc_cv_asm_mpx+:} false; then :
|
|
$as_echo_n "(cached) " >&6
|
|
else
|
|
cat > conftest.s <<\EOF
|
|
bndmov %bnd0,(%esp)
|
|
EOF
|
|
if { ac_try='${CC-cc} -c $ASFLAGS conftest.s 1>&5'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; }; then
|
|
libc_cv_asm_mpx=yes
|
|
else
|
|
libc_cv_asm_mpx=no
|
|
fi
|
|
rm -f conftest*
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_mpx" >&5
|
|
$as_echo "$libc_cv_asm_mpx" >&6; }
|
|
if test $libc_cv_asm_mpx == yes; then
|
|
$as_echo "#define HAVE_MPX_SUPPORT 1" >>confdefs.h
|
|
|
|
fi
|
|
|
|
$as_echo "#define USE_REGPARMS 1" >>confdefs.h
|
|
|
|
|
|
$as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
|
|
|