[power-iee128] libgfortran: Use -mno-gnu-attribute in libgfortran

[Jakub Jelinek via Gcc-patches]

On Mon, Jan 03, 2022 at 11:33:32AM +0100, Jakub Jelinek wrote:
> The idea behind this is that libstdc++ is written such that it can handle
> both IBM extended and IEEE quad long double, so its object files are
> compatible with both.

Now tested on powerpc64le-linux (and together with the regenerated file),
ok for power-ieee128?

2022-01-03  Jakub Jelinek  <ja...@redhat.com>

        * configure.ac (Use -mno-gnu-attribute together with
        -mabi=ibmlongdouble or -mabi=ieeelongdouble.
        * configure: Regenerated.

--- libgfortran/configure.ac.jj 2021-12-31 11:08:19.032835533 +0000
+++ libgfortran/configure.ac    2022-01-03 10:32:16.927834682 +0000
@@ -163,9 +163,9 @@ if test "x$GCC" = "xyes"; then
                           #error long double is double
                           #endif]],
                          [[(void) 0;]])],
-        [AM_FCFLAGS="$AM_FCFLAGS -mabi=ibmlongdouble";
-        AM_CFLAGS="$AM_CFLAGS -mabi=ibmlongdouble";
-        CFLAGS="$CFLAGS -mabi=ibmlongdouble";
+        [AM_FCFLAGS="$AM_FCFLAGS -mabi=ibmlongdouble -mno-gnu-attribute";
+        AM_CFLAGS="$AM_CFLAGS -mabi=ibmlongdouble -mno-gnu-attribute";
+        CFLAGS="$CFLAGS -mabi=ibmlongdouble -mno-gnu-attribute";
         have_real_17=yes])
       ;;
     *)
--- libgfortran/configure.jj    2021-12-31 11:08:19.032835533 +0000
+++ libgfortran/configure       2022-01-03 13:55:38.684926082 +0000
@@ -6025,9 +6025,9 @@ main ()
 }
 _ACEOF
 if ac_fn_c_try_cpp "$LINENO"; then :
-  AM_FCFLAGS="$AM_FCFLAGS -mabi=ibmlongdouble";
-        AM_CFLAGS="$AM_CFLAGS -mabi=ibmlongdouble";
-        CFLAGS="$CFLAGS -mabi=ibmlongdouble";
+  AM_FCFLAGS="$AM_FCFLAGS -mabi=ibmlongdouble -mno-gnu-attribute";
+        AM_CFLAGS="$AM_CFLAGS -mabi=ibmlongdouble -mno-gnu-attribute";
+        CFLAGS="$CFLAGS -mabi=ibmlongdouble -mno-gnu-attribute";
         have_real_17=yes
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext


        Jakub