From: Roy Marples <roy@marples.name>
Date: Mon, 4 Nov 2019 19:56:51 +0000 (+0000)
Subject: build: Check compiler actually supports address sanitisation.
X-Git-Tag: v8.1.2~24
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0654ec3d63beec42135fee764f43949248a60bc8;p=thirdparty%2Fdhcpcd.git

build: Check compiler actually supports address sanitisation.
---

diff --git a/configure b/configure
index 146aedec..bbc71db8 100755
--- a/configure
+++ b/configure
@@ -373,12 +373,24 @@ if [ -z "$DEBUG" -a -d .git ]; then
 	DEBUG=yes
 fi
 if [ -n "$DEBUG" -a "$DEBUG" != no -a "$DEBUG" != false ]; then
+	printf "Testing compiler supports address sanitisation ..."
+	cat <<EOF >_test.c
+int main(void) {
+	return 0;
+}
+EOF
+	if $CC -fsanitize=address _test.c -o _test 2>&3; then
+		echo "yes"
+		echo "# Compiler supports address sanitisation" >>$CONFIG_MK
+		echo "CFLAGS+=		-fsanitize=address" >>$CONFIG_MK
+		echo "LDFLAGS+=		-fsanitize=address" >>$CONFIG_MK
+	else
+		echo "no"
+	fi
+	rm -rf _test.c _test
+
 	echo "Adding debugging CFLAGS"
 	cat <<EOF >>$CONFIG_MK
-# Enforce address sanitization
-CFLAGS+=	-fsanitize=address
-LDFLAGS+=	-fsanitize=address
-
 CFLAGS+=	-g -Wall -Wextra
 CFLAGS+=	-Wmissing-prototypes -Wmissing-declarations
 CFLAGS+=	-Wmissing-format-attribute -Wnested-externs