add optional support for building with asan

mu/Makefile.am

@@ -26,13 +26,18 @@ AM_CPPFLAGS=-I${top_srcdir}/lib $(GLIB_CFLAGS)
 # use -Wno-unused-parameters, because some callbacks may not
 # really need all the params they get
 AM_CFLAGS=						\
+	$(ASAN_CFLAGS)					\
 	$(WARN_CFLAGS)					\
 	-Wno-switch-enum				\
 	-DMU_SCRIPTS_DIR="\"$(pkgdatadir)/scripts/\""
 
 AM_CXXFLAGS=						\
+	$(ASAN_CXXCFLAGS)				\
 	$(WARN_CXXFLAGS)
 
+AM_LDFLAGS=						\
+	$(ASAN_LDFLAGS)
+
 bin_PROGRAMS=						\
 	mu
 

mu/tests/Makefile.am

@@ -33,8 +33,16 @@ AM_CPPFLAGS=$(XAPIAN_CXXFLAGS)						\
 # don't use -Werror, as it might break on other compilers
 # use -Wno-unused-parameters, because some callbacks may not
 # really need all the params they get
-AM_CFLAGS=${WARN_CFLAGS}
-AM_CXXFLAGS=${WARN_CXXFLAGS}
+AM_CFLAGS=								\
+	$(ASAN_CFLAGS)							\
+	${WARN_CFLAGS}
+AM_CXXFLAGS=								\
+	$(ASAN_CFLAGS)							\
+	${WARN_CFLAGS}
+${WARN_CXXFLAGS}
+
+AM_LDFLAGS=								\
+	$(ASAN_LDFLAGS)
 
 noinst_PROGRAMS= $(TEST_PROGS)