From 4cc9331b04314dc33c38f20492e3867d753ceb5e Mon Sep 17 00:00:00 2001
From: Sebastian Harl <sh@tokkee.org>
Date: Fri, 16 Oct 2009 00:01:14 +0200
Subject: [PATCH] configure.ac: Added --disable-strict-checks command line
 option.

This option may be used to disable strict compiler checks (enabled by
default).
---
 configure.ac | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index d3f05aa..47c9c09 100644
--- a/configure.ac
+++ b/configure.ac
@@ -91,7 +91,15 @@ if test "x$enable_hardening" = "xyes"; then
 	fi
 fi
 
-for flag in -Wall -Wextra -Werror; do
+dnl Strict checking for potential problems.
+AC_ARG_ENABLE([strict-checks],
+		AS_HELP_STRING([--disable-strict-checks],
+				[Disable strict compiler checks]),
+		[enable_strict_checks="$enableval"],
+		[enable_strict_checks="yes"])
+
+STRICT_CFLAGS=""
+for flag in -Wall -Werror; do
 	AC_MSG_CHECKING([whether $CC accepts $flag])
 
 	if test_cc_flags $flag; then
@@ -101,6 +109,30 @@ for flag in -Wall -Wextra -Werror; do
 		AC_MSG_RESULT([no])
 	fi
 done
+
+if test "x$enable_strict_checks" = "xyes"; then
+	for flag in -Wextra \
+			-Wbad-function-cast \
+			-Wcast-align \
+			-Wcast-qual \
+			-Wconversion \
+			-Wdeclaration-after-statement \
+			-Wmissing-prototypes \
+			-Wpointer-arith \
+			-Wshadow \
+			-Wstrict-prototypes \
+			-Wunreachable-code \
+			-Wvla; do
+		AC_MSG_CHECKING([whether $CC accepts $flag])
+
+		if test_cc_flags $flag; then
+			STRICT_CFLAGS="$STRICT_CFLAGS $flag"
+			AC_MSG_RESULT([yes])
+		else
+			AC_MSG_RESULT([no])
+		fi
+	done
+fi
 AC_SUBST([STRICT_CFLAGS])
 
 build_date="`date --utc '+%F %T'` (UTC)"
-- 
2.30.2