cat stderr >&2
grep "^configure\\.ac:5:.*$warn_rx" stderr
-cat aclocal.sav "$am_automake_acdir"/protos.m4 > aclocal.m4
+cat aclocal.sav "$am_automake_acdir"/obsolete-err.m4 > aclocal.m4
$AUTOCONF -Wnone 2>stderr && { cat stderr >&2; exit 1; }
cat stderr >&2
grep "^configure\\.ac:5:.*$warn_rx" stderr