| # 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 $no_ssp |
| -O0 -nostdlib -nostartfiles |
| -S conftest.c -o - | fgrep "__sync_val_compare_and_swap" |
| 1>&5' |
| { { eval echo "\"\$as_me\":${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; } |
| |
| if test "$static_pie" = yes; then |
| { $as_echo "$as_me:${as_lineno-$LINENO}: checking for linker static PIE support" >&5 |
| $as_echo_n "checking for linker static PIE support... " >&6; } |
| if ${libc_cv_ld_static_pie+:} false; then : |
| $as_echo_n "(cached) " >&6 |
| else |
| cat > conftest.s <<\EOF |
| .text |
| .global _start |
| _start: |
| movl _start@GOT(%ebx), %eax |
| EOF |
| libc_cv_pie_option="-Wl,-pie" |
| libc_cv_ld_static_pie=no |
| if { ac_try='${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 $ac_try) 2>&5 |
| ac_status=$? |
| $as_echo "$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 |
| { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ld_static_pie" >&5 |
| $as_echo "$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 |
| |
| { $as_echo "$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 |
| |
| $as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h |
| |
| |
| if test x"$multi_arch" != xno; then |
| $as_echo "#define NO_HIDDEN_EXTERN_FUNC_IN_PIE 1" >>confdefs.h |
| |
| fi |
