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(HAVE_DWARF2_UNWIND_INFO): Check for it.

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(HAVE_DWARF2_UNWIND_INFO_STATIC): Check for it.
This commit is contained in:
Ulrich Drepper 1998-12-11 18:04:12 +00:00
parent 03b0ae9d90
commit 74600f090e
1 changed files with 55 additions and 0 deletions
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55
configure.in
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@ -759,6 +759,61 @@ fi
rm -f conftest*])
AC_SUBST(libc_cv_ld_no_whole_archive)dnl
AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
[cat > conftest.c <<EOF
#line __oline__ "configure"
static char __EH_FRAME_BEGIN__[];
_start ()
{
#ifdef CHECK__register_frame
__register_frame (__EH_FRAME_BEGIN__);
__deregister_frame (__EH_FRAME_BEGIN__);
#endif
#ifdef CHECK__register_frame_info
__register_frame_info (__EH_FRAME_BEGIN__);
__deregister_frame_info (__EH_FRAME_BEGIN__);
#endif
}
int __eh_pc;
__throw () {}
/* FIXME: this is fragile. */
malloc () {}
strcmp () {}
strlen () {}
memcpy () {}
memset () {}
free () {}
abort () {}
__bzero () {}
EOF
dnl No \ in command here because it ends up inside ''.
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
-nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&AC_FD_CC]); then
libc_cv_gcc_dwarf2_unwind_info=static
else
libc_cv_gcc_dwarf2_unwind_info=no
fi
if test $libc_cv_gcc_dwarf2_unwind_info = no; then
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
-nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&AC_FD_CC]); then
libc_cv_gcc_dwarf2_unwind_info=yes
else
libc_cv_gcc_dwarf2_unwind_info=no
fi
fi
rm -f conftest*])
case $libc_cv_gcc_dwarf2_unwind_info in
yes)
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
;;
static)
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
;;
esac
AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
cat > conftest.c <<\EOF
_start () {}