| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | # This file is generated from configure.ac by Autoconf. DO NOT EDIT! |
| 2 | # Local configure fragment for sysdeps/i386. |
| 3 | |
| 4 | # We no longer support i386 since it lacks the atomic instructions |
| 5 | # required to implement NPTL threading. |
| 6 | if test "$config_machine" = i386; then |
| 7 | as_fn_error $? " |
| 8 | *** ERROR: Support for i386 is deprecated. |
| 9 | *** Please use host i786, i686, i585 or i486. |
| 10 | *** For example: /src/glibc/configure --host=i686-pc-linux-gnu ...\"" "$LINENO" 5 |
| 11 | fi |
| 12 | |
| 13 | # The GNU C Library can't be built for i386. There are several reasons for |
| 14 | # this restriction. The primary reason is that i386 lacks the atomic |
| 15 | # operations required to support the current NPTL implementation. While it is |
| 16 | # possible that such atomic operations could be emulated in the kernel to date |
| 17 | # no such work has been done to enable this. Even with NPTL disabled you still |
| 18 | # have no atomic.h implementation. Given the declining use of i386 we disable |
| 19 | # support for building with `-march=i386' or `-mcpu=i386.' We don't explicitly |
| 20 | # check for i386, instead we make sure the compiler has support for inlining |
| 21 | # the builtin __sync_val_compare_and_swap. If it does then we should have no |
| 22 | # problem building for i386. |
| 23 | { $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler support of inlined builtin function __sync_val_compare_and_swap" >&5 |
| 24 | $as_echo_n "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; } |
| 25 | libc_compiler_builtin_inlined=no |
| 26 | cat > conftest.c <<EOF |
| 27 | int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; } |
| 28 | EOF |
| 29 | if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
| 30 | -O0 -nostdlib -nostartfiles |
| 31 | -S conftest.c -o - | fgrep "__sync_val_compare_and_swap" |
| 32 | 1>&5' |
| 33 | { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 |
| 34 | (eval $ac_try) 2>&5 |
| 35 | ac_status=$? |
| 36 | $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 |
| 37 | test $ac_status = 0; }; } |
| 38 | then |
| 39 | libc_compiler_builtin_inlined=yes |
| 40 | fi |
| 41 | rm -f conftest* |
| 42 | if test $libc_compiler_builtin_inlined = yes; then |
| 43 | libc_cv_unsupported_i386=no |
| 44 | else |
| 45 | as_fn_error $? " |
| 46 | *** Building with -march=i386/-mcpu=i386 is not supported. |
| 47 | *** Please use host i786, i686, i586, or i486. |
| 48 | *** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ..." "$LINENO" 5 |
| 49 | fi |
| 50 | { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5 |
| 51 | $as_echo "$libc_compiler_builtin_inlined" >&6; } |
| 52 | |
| 53 | { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Intel MPX support" >&5 |
| 54 | $as_echo_n "checking for Intel MPX support... " >&6; } |
| 55 | if ${libc_cv_asm_mpx+:} false; then : |
| 56 | $as_echo_n "(cached) " >&6 |
| 57 | else |
| 58 | cat > conftest.s <<\EOF |
| 59 | bndmov %bnd0,(%esp) |
| 60 | EOF |
| 61 | if { ac_try='${CC-cc} -c $ASFLAGS conftest.s 1>&5' |
| 62 | { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 |
| 63 | (eval $ac_try) 2>&5 |
| 64 | ac_status=$? |
| 65 | $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 |
| 66 | test $ac_status = 0; }; }; then |
| 67 | libc_cv_asm_mpx=yes |
| 68 | else |
| 69 | libc_cv_asm_mpx=no |
| 70 | fi |
| 71 | rm -f conftest* |
| 72 | fi |
| 73 | { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_mpx" >&5 |
| 74 | $as_echo "$libc_cv_asm_mpx" >&6; } |
| 75 | if test $libc_cv_asm_mpx == yes; then |
| 76 | $as_echo "#define HAVE_MPX_SUPPORT 1" >>confdefs.h |
| 77 | |
| 78 | fi |
| 79 | |
| 80 | $as_echo "#define USE_REGPARMS 1" >>confdefs.h |
| 81 | |
| 82 | |
| 83 | $as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h |
| 84 | |