mpers.m4: enhance workaround for missing gnu/stubs-*.h files

Make generated empty gnu stub files available for mpers_test.sh check.

* m4/mpers.m4 (st_MPERS): Add $IFLAG to CPPFLAGS for mpers_test.sh
invocation.

Complements: v4.11~223 ("mpers.m4: workaround missing gnu/stubs-*.h files")

diff --git a/m4/mpers.m4 b/m4/mpers.m4
index f1a7572b85fbc1e9da707ef98b265be6a0168c60..78598773972bd50dbca7f0413aa5c73b4bb31f5f 100644 (file)
--- a/m4/mpers.m4
+++ b/m4/mpers.m4
@@ -122,7 +122,7 @@ case "$arch" in
                AC_CACHE_CHECK([whether mpers.sh mpers_name MPERS_CFLAGS works],
                        [st_cv_mpers],
                        [if READELF="$READELF" \
-                           CC="$CC" CPP="$CPP" CPPFLAGS="$CPPFLAGS" \
+                           CC="$CC" CPP="$CPP" CPPFLAGS="$CPPFLAGS $IFLAG" \
                            $srcdir/mpers_test.sh [$1] MPERS_CFLAGS; then
                                st_cv_mpers=yes
                         else