Add '--enable-sanitize' from other osmocom projects

Change-Id: Iac9ce76ce4ca5f5247bc42c16bb365d94cfde156

configure.ac

@@ -24,6 +24,18 @@ case "$host" in
 *) AC_MSG_ERROR([Linux only, dude!]);;
 esac
 
+AC_ARG_ENABLE(sanitize,
+	[AS_HELP_STRING(
+		[--enable-sanitize],
+		[Compile with address sanitizer enabled],
+	)],
+	[sanitize=$enableval], [sanitize="no"])
+if test x"$sanitize" = x"yes"
+then
+	CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
+	CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
+fi
+
 regular_CPPFLAGS="-D_FILE_OFFSET_BITS=64 -D_REENTRANT"
 regular_CFLAGS="-Wall -Waggregate-return -Wmissing-declarations \
 	-Wmissing-prototypes -Wshadow -Wstrict-prototypes \

contrib/jenkins.sh

@@ -5,7 +5,7 @@ set -ex
 osmo-clean-workspace.sh
 
 autoreconf --install --force
-./configure CFLAGS="-Werror" CPPFLAGS="-Werror"
+./configure --enable-sanitize CFLAGS="-Werror" CPPFLAGS="-Werror"
 $MAKE $PARALLEL_MAKE
 $MAKE distcheck