Update.

2004-09-08  H.J. Lu  <hongjiu.lu@intel.com>

	* Makeconfig (libunwind): New.
	(libgcc_eh): Add $(libunwind).
	(gnulib): Always set to -lgcc $(libgcc_eh).
	(static-gnulib): Always set to -lgcc -lgcc_eh $(libunwind).
	(libc.so-gnulib): New.
	* Makerules (LDLIBS-c.so): Use $(libc.so-gnulib) instead of
	$(static-gnulib).
	* configure.in (libc_cv_cc_with_libunwind): Set to yes if gcc
	uses -lunwind for static binaries.

1 files changed, 10 insertions, 49 deletions

diff --git a/configure b/configure
index 2ce30a3265..93fff2a64d 100755
--- a/configure
+++ b/configure
@@ -5399,56 +5399,17 @@ echo $ECHO_N "checking for libunwind-support in compiler... $ECHO_C" >&6
 if test "${libc_cv_cc_with_libunwind+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
-      cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <libunwind.h>
-int
-main ()
-{
 
-      unw_context_t uc;
-      unw_cursor_t c;
-      unw_getcontext (&uc);
-      unw_init_local (&c, &uc)
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-	 { ac_try='test -z "$ac_c_werror_flag"
-			 || test ! -s conftest.err'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; } &&
-	 { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  libc_cv_cc_with_libunwind=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-libc_cv_cc_with_libunwind=no
-fi
-rm -f conftest.err conftest.$ac_objext \
-      conftest$ac_exeext conftest.$ac_ext
+    cat > conftest.c <<EOF
+int main (void) { return 0; }
+EOF
+    if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
+       conftest.c -v 2>&1 >/dev/null | grep -q " -lunwind "; then
+      libc_cv_cc_with_libunwind=yes
+    else
+      libc_cv_cc_with_libunwind=no
+    fi
+    rm -f conftest*
 fi
 echo "$as_me:$LINENO: result: $libc_cv_cc_with_libunwind" >&5
 echo "${ECHO_T}$libc_cv_cc_with_libunwind" >&6