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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!
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# Local configure fragment for sysdeps/i386.
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# We no longer support i386 since it lacks the atomic instructions
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# required to implement NPTL threading.
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if test "$config_machine" = i386; then
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as_fn_error $? "
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*** ERROR: Support for i386 is deprecated.
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*** Please use host i786, i686, i585 or i486.
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*** For example: /src/glibc/configure --host=i686-pc-linux-gnu ...\"" "$LINENO" 5
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fi
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# The GNU C Library can't be built for i386. There are several reasons for
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# this restriction. The primary reason is that i386 lacks the atomic
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# operations required to support the current NPTL implementation. While it is
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# possible that such atomic operations could be emulated in the kernel to date
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# no such work has been done to enable this. Even with NPTL disabled you still
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# have no atomic.h implementation. Given the declining use of i386 we disable
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# support for building with `-march=i386' or `-mcpu=i386.' We don't explicitly
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# check for i386, instead we make sure the compiler has support for inlining
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# the builtin __sync_val_compare_and_swap. If it does then we should have no
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# problem building for i386.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler support of inlined builtin function __sync_val_compare_and_swap" >&5
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$as_echo_n "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; }
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libc_compiler_builtin_inlined=no
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cat > conftest.c <<EOF
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int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
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EOF
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if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
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-O0 -nostdlib -nostartfiles
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-S conftest.c -o - | fgrep "__sync_val_compare_and_swap"
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1>&5'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }
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then
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libc_compiler_builtin_inlined=yes
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fi
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rm -f conftest*
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if test $libc_compiler_builtin_inlined = yes; then
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libc_cv_unsupported_i386=no
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else
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as_fn_error $? "
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*** Building with -march=i386/-mcpu=i386 is not supported.
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*** Please use host i786, i686, i586, or i486.
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*** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ..." "$LINENO" 5
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5
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$as_echo "$libc_compiler_builtin_inlined" >&6; }
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for Intel MPX support" >&5
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$as_echo_n "checking for Intel MPX support... " >&6; }
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if ${libc_cv_asm_mpx+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.s <<\EOF
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bndmov %bnd0,(%esp)
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EOF
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if { ac_try='${CC-cc} -c $ASFLAGS conftest.s 1>&5'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }; then
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libc_cv_asm_mpx=yes
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else
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libc_cv_asm_mpx=no
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_mpx" >&5
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$as_echo "$libc_cv_asm_mpx" >&6; }
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if test $libc_cv_asm_mpx == yes; then
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$as_echo "#define HAVE_MPX_SUPPORT 1" >>confdefs.h
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fi
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$as_echo "#define USE_REGPARMS 1" >>confdefs.h
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$as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
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