TT#111150 add top-level make target for asan test

This is a convenient shortcut to also run these tests locally.

Change-Id: Ifb1355319b7eebd708acddea6e0fc7fa2c7dcdfb

.github/workflows/unit-tests.yml

@@ -11,9 +11,6 @@ jobs:
     runs-on: ubuntu-latest
     name: Run unit tests
 
-    env:
-      FLAGS: "-ggdb -O0 -fsanitize=address -fsanitize=leak -fsanitize=undefined"
-
     steps:
       - name: Checkout source
         uses: actions/checkout@v2
@@ -28,4 +25,4 @@ jobs:
 
       - name: Run unit tests with sanitizers enabled
         run: |
-          CFLAGS="$FLAGS" LDFLAGS="$FLAGS" ASAN_OPTIONS=verify_asan_link_order=0 UBSAN_OPTIONS=print_stacktrace=1 G_SLICE=always-malloc make check
+          make asan-check

Makefile

@@ -1,6 +1,18 @@
 RTPENGINE_ROOT_DIR=.
 with_transcoding ?= yes
 
+ifeq ($(DO_ASAN_FLAGS),1)
+ASAN_FLAGS = -ggdb -O0 -fsanitize=address -fsanitize=leak -fsanitize=undefined
+CFLAGS ?= -Wall -Wextra -Wno-sign-compare -Wno-unused-parameter -Wstrict-prototypes
+CFLAGS += $(ASAN_FLAGS)
+LDFLAGS += $(ASAN_FLAGS)
+export CFLAGS
+export LDFLAGS
+export ASAN_OPTIONS=verify_asan_link_order=0
+export UBSAN_OPTIONS=print_stacktrace=1
+export G_SLICE=always-malloc
+endif
+
 include lib/lib.Makefile
 
 .PHONY:	all distclean clean coverity
@@ -36,7 +48,10 @@ distclean clean:
 	$(MAKE) -C iptables-extension $@
 	$(MAKE) -C kernel-module $@
 
-.PHONY: check
+.PHONY: check asan-check
 
 check: all
 	$(MAKE) -C t
+
+asan-check:
+	DO_ASAN_FLAGS=1 $(MAKE) check