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.
6if 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
11fi
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$as_echo_n "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; }
25libc_compiler_builtin_inlined=no
26cat > conftest.c <<EOF
27int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
28EOF
29if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
30		     -O0 -nostdlib -nostartfiles
31		     -S conftest.c -o - | fgrep "__sync_val_compare_and_swap"
32		     1>&5'
33  { { eval echo "\"\$as_me\":${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; }; }
38then
39  libc_compiler_builtin_inlined=yes
40fi
41rm -f conftest*
42if test $libc_compiler_builtin_inlined = yes; then
43  libc_cv_unsupported_i386=no
44else
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
49fi
50{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5
51$as_echo "$libc_compiler_builtin_inlined" >&6; }
52
53if test "$static_pie" = yes; then
54  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for linker static PIE support" >&5
55$as_echo_n "checking for linker static PIE support... " >&6; }
56if ${libc_cv_ld_static_pie+:} false; then :
57  $as_echo_n "(cached) " >&6
58else
59  cat > conftest.s <<\EOF
60	.text
61	.global _start
62_start:
63	movl	_start@GOT(%ebx), %eax
64EOF
65  libc_cv_pie_option="-Wl,-pie"
66  libc_cv_ld_static_pie=no
67  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostartfiles -nostdlib $no_ssp $libc_cv_pie_option -o conftest conftest.s 1>&5'
68  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
69  (eval $ac_try) 2>&5
70  ac_status=$?
71  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
72  test $ac_status = 0; }; }; then
73    if $READELF -r conftest | grep 'There are no relocations in this file.' > /dev/null; then
74      libc_cv_ld_static_pie=yes
75    fi
76  fi
77rm -f conftest*
78fi
79{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ld_static_pie" >&5
80$as_echo "$libc_cv_ld_static_pie" >&6; }
81  if test "$libc_cv_ld_static_pie" != yes; then
82    as_fn_error $? "linker support for static PIE needed" "$LINENO" 5
83  fi
84fi
85
86$as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
87
88
89if test x"$multi_arch" != xno; then
90  $as_echo "#define NO_HIDDEN_EXTERN_FUNC_IN_PIE 1" >>confdefs.h
91
92fi
93
94$as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
95
96