From b226ebedc9f7762b07029d77bd3b4a107ae1c087 Mon Sep 17 00:00:00 2001
From: Francois-Xavier Le Bail <fx.lebail@yahoo.com>
Date: Wed, 9 Sep 2015 07:42:39 +0200
Subject: [PATCH] Compile with '-Wold-style-definition' in devel mode

---
 aclocal.m4 |  1 +
 configure  | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/aclocal.m4 b/aclocal.m4
index a50c2f0b..64ed979b 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -982,6 +982,7 @@ AC_DEFUN(AC_LBL_DEVEL,
 		    AC_LBL_CHECK_COMPILER_OPT($1, -Wshadow)
 		    AC_LBL_CHECK_COMPILER_OPT($1, -Wdeclaration-after-statement)
 		    AC_LBL_CHECK_COMPILER_OPT($1, -Wpedantic)
+		    AC_LBL_CHECK_COMPILER_OPT($1, -Wold-style-definition)
 		    AC_LBL_CHECK_COMPILER_OPT($1, -W)
 	    fi
 	    AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT()
diff --git a/configure b/configure
index db3780a9..e93add3f 100755
--- a/configure
+++ b/configure
@@ -7980,6 +7980,38 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
 
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports the -Wold-style-definition option" >&5
+$as_echo_n "checking whether the compiler supports the -Wold-style-definition option... " >&6; }
+	save_CFLAGS="$CFLAGS"
+	CFLAGS="$CFLAGS $ac_lbl_unknown_warning_option_error -Wold-style-definition"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return 0
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		CFLAGS="$save_CFLAGS"
+		V_CCOPT="$V_CCOPT -Wold-style-definition"
+
+else
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+		CFLAGS="$save_CFLAGS"
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports the -W option" >&5
 $as_echo_n "checking whether the compiler supports the -W option... " >&6; }
 	save_CFLAGS="$CFLAGS"
-- 
2.39.5