Add feature to build with ASAN (--enable-gcc-asan)

configure.ac

@@ -458,6 +458,8 @@ else
   EC_C_WARNINGS()
 fi
 
+EC_C_ASAN()
+
 AC_DEFINE(USE_EXT_INIT_WIN,          1, [Use external init window during restart])
 
 AC_DEFINE(ENABLE_DESKRAY,            0, [Enable deskrays (not functional)])

dox/Makefile.am

@@ -9,5 +9,7 @@ edox_SOURCES = dox.c dox.h file.c format.c text.c ttfont.c
 edox_CPPFLAGS = -I$(top_builddir) $(IMLIB2_CFLAGS) $(X_CFLAGS) \
 	$(CFLAGS_WARNINGS) -D ENLIGHTENMENT_ROOT=\"$(pkgdatadir)\"
 
+edox_CFLAGS = $(CFLAGS_ASAN)
+
 LDADD = $(IMLIB2_LIBS) $(X_LIBS) $(XINERAMA_LIBS) -lX11 -lm
 

eesh/Makefile.am

@@ -5,5 +5,7 @@ eesh_SOURCES = E.h comms.c main.c
 
 eesh_CPPFLAGS = -I$(top_builddir) $(X_CFLAGS) $(CFLAGS_WARNINGS)
 
+eesh_CFLAGS = $(CFLAGS_ASAN)
+
 LDADD = $(X_LIBS) -lX11
 

lib/Makefile.am

@@ -5,6 +5,8 @@ libe16_LTLIBRARIES = $(LIB_HACK) $(LIB_TRIP)
 AM_CPPFLAGS = -I$(top_srcdir)/src $(X_CFLAGS) \
 	      $(CFLAGS_WARNINGS) $(CFLAGS_VISIBILITY)
 
+AM_CFLAGS = $(CFLAGS_ASAN)
+
 if BUILD_LIBHACK
 
 LIB_HACK = libhack.la

m4/ec_asan.m4

@@ -0,0 +1,20 @@
+dnl Copyright (C) 2020 Kim Woelders
+dnl This code is public domain and can be freely used or copied.
+
+dnl Macro to set compiler flags in CFLAGS_ASAN
+
+dnl Usage: EC_C_ASAN()
+
+AC_DEFUN([EC_C_ASAN], [
+  AC_ARG_ENABLE(gcc-asan,
+    [AS_HELP_STRING([--enable-gcc-asan],
+                    [compile with ASAN support @<:@default=no@:>@])],,
+    enable_gcc_asan=no)
+
+  if test "x$GCC" = "xyes"; then
+    if test "x$enable_gcc_asan" = "xyes"; then
+      CFLAGS_ASAN="-fsanitize=address -fno-omit-frame-pointer"
+    fi
+  fi
+  AC_SUBST(CFLAGS_ASAN)
+])

src/Makefile.am

@@ -119,6 +119,9 @@ e16_SOURCES = \
 	$(SRCS_DBUS)		\
 	$(SRCS_SNPRINTF)
 
+AM_CFLAGS = \
+	$(CFLAGS_ASAN)
+
 AM_CPPFLAGS = \
 	$(CFLAGS_WARNINGS) \
 	$(CFLAGS_VISIBILITY) \