1 # This file is generated from configure.ac by Autoconf. DO NOT EDIT!
2 # Local configure fragment for sysdeps/i386.
4 # We no longer support i386 since it lacks the atomic instructions
5 # required to implement NPTL threading.
6 if test "$config_machine" = i386; then
8 *** ERROR: Support for i386 is deprecated.
9 *** Please use host i786, i686, i585 or i486.
10 *** For example: /src/glibc/configure --host=i686-pc-linux-gnu ...\"" "$LINENO" 5
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 $as_echo_n "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; }
25 libc_compiler_builtin_inlined=no
26 cat > conftest.c <<EOF
27 int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
29 if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
30 -O0 -nostdlib -nostartfiles
31 -S conftest.c -o - | fgrep "__sync_val_compare_and_swap"
33 { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
36 $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
37 test $ac_status = 0; }; }
39 libc_compiler_builtin_inlined=yes
42 if test $libc_compiler_builtin_inlined = yes; then
43 libc_cv_unsupported_i386=no
46 *** Building with -march=i386/-mcpu=i386 is not supported.
47 *** Please use host i786, i686, i586, or i486.
48 *** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ..." "$LINENO" 5
50 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5
51 $as_echo "$libc_compiler_builtin_inlined" >&6; }
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 $as_echo_n "(cached) " >&6
58 cat > conftest.s <<\EOF
61 if { ac_try='${CC-cc} -c $ASFLAGS conftest.s 1>&5'
62 { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
65 $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
66 test $ac_status = 0; }; }; then
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
80 $as_echo "#define USE_REGPARMS 1" >>confdefs.h
83 $as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h