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Fix .ctors/.dtors header configure test for bootstrapping.

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This commit is contained in:
Joseph Myers 2012-03-08 00:17:27 +00:00
parent af6a1e3755
commit 07037eeb43
4 changed files with 53 additions and 35 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2012-03-08 Joseph Myers <joseph@codesourcery.com>
* aclocal.m4 (LIBC_TRY_LINK_STATIC): New macro.
* configure.in (libc_cv_preinit_array): Use LIBC_TRY_LINK_STATIC.
(libc_cv_ctors_header): Likewise. Use asm ("") instead of calling
puts.
* configure: Regenerated.
2012-03-07 Joseph Myers <joseph@codesourcery.com>
* sysdeps/i386/configure.in (cpuid.h): Use AC_CHECK_HEADER with no

14
aclocal.m4 vendored
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@ -113,3 +113,17 @@ AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
[LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
gnu_ld=$libc_cv_prog_ld_gnu
])
dnl Run a static link test with -nostdlib -nostartfiles.
dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
AC_DEFUN([LIBC_TRY_LINK_STATIC],
[cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
$1
EOF
AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
conftest.c -static -nostartfiles -nostdlib
1>&AS_MESSAGE_LOG_FD])],
[$2], [$3])
rm -f conftest*])

41
configure vendored
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@ -5999,17 +5999,19 @@ else
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
int foo (void) { return 1; }
int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
EOF
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
-static -nostartfiles -nostdlib 1>&5'
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
conftest.c -static -nostartfiles -nostdlib
1>&5'
{ { eval echo "\"\$as_me\":${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
test $ac_status = 0; }; }; then :
if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
libc_cv_initfini_array=yes
else
@ -6019,6 +6021,7 @@ else
libc_cv_initfini_array=no
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_initfini_array" >&5
$as_echo "$libc_cv_initfini_array" >&6; }
@ -6032,21 +6035,22 @@ if ${libc_cv_ctors_header+:} false; then :
$as_echo_n "(cached) " >&6
else
libc_cv_ctors_header=yes
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
int
main ()
{
__attribute__ ((constructor)) void ctor (void) { asm (""); }
__attribute__ ((destructor)) void dtor (void) { asm (""); }
__attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
__attribute__ ((destructor)) void dtor (void) { puts("dtor"); }
;
return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
EOF
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
conftest.c -static -nostartfiles -nostdlib
1>&5'
{ { eval echo "\"\$as_me\":${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 $READELF -WS conftest$ac_exeext | $AWK '
{ gsub(/\[ */, "[") }
$2 == ".ctors" || $2 == ".dtors" {
@ -6068,8 +6072,7 @@ else
as_fn_error $? "missing __attribute__ ((constructor)) support??" "$LINENO" 5
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ctors_header" >&5

25
configure.in
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@ -1349,24 +1349,17 @@ fi
AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
libc_cv_initfini_array, [dnl
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
LIBC_TRY_LINK_STATIC([
int foo (void) { return 1; }
int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
-static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
then
if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
],
[if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
libc_cv_initfini_array=yes
else
libc_cv_initfini_array=no
fi
else
libc_cv_initfini_array=no
fi
rm -f conftest*])
fi],
[libc_cv_initfini_array=no])
])
if test $libc_cv_initfini_array != yes; then
AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
fi
@ -1374,9 +1367,9 @@ fi
AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
libc_cv_ctors_header, [dnl
libc_cv_ctors_header=yes
AC_TRY_LINK([], [
__attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
__attribute__ ((destructor)) void dtor (void) { puts("dtor"); }
LIBC_TRY_LINK_STATIC([
__attribute__ ((constructor)) void ctor (void) { asm (""); }
__attribute__ ((destructor)) void dtor (void) { asm (""); }
],
[dnl
AS_IF([$READELF -WS conftest$ac_exeext | $AWK '