Split out -Wframe-larger-than warning from WARN_CLFAGS

Introduce STRICT_FRAME_LIMIT_CFLAGS that will be used for
production code and RELAXED_FRAME_LIMIT_CFLAGS for tests.

Raising the limit for tests allows building them with clang
with optimizations disabled.

(cherry picked from commit e73889b631)

daemon/Makefile.am

@@ -31,6 +31,8 @@ INCLUDES = \
 
 CLEANFILES =
 
+WARN_CFLAGS += $(STRICT_FRAME_LIMIT_CFLAGS)
+
 DAEMON_GENERATED =			\
 		remote_dispatch.h	\
 		lxc_dispatch.h		\

m4/virt-compile-warnings.m4

@@ -169,8 +169,8 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
     # This should be < 256 really. Currently we're down to 4096,
     # but using 1024 bytes sized buffers (mostly for virStrerror)
     # stops us from going down further
-    wantwarn="$wantwarn -Wframe-larger-than=4096"
-    dnl wantwarn="$wantwarn -Wframe-larger-than=256"
+    gl_WARN_ADD(["-Wframe-larger-than=4096"], [STRICT_FRAME_LIMIT_CFLAGS])
+    gl_WARN_ADD(["-Wframe-larger-than=25600"], [RELAXED_FRAME_LIMIT_CFLAGS])
 
     # Extra special flags
     dnl -fstack-protector stuff passes gl_WARN_ADD with gcc

src/Makefile.am

@@ -37,6 +37,8 @@ INCLUDES =	-I../gnulib/lib					\
 		-Dabs_topsrcdir="\"$(abs_topsrcdir)\""		\
 		$(GETTEXT_CPPFLAGS)
 
+WARN_CFLAGS += $(STRICT_FRAME_LIMIT_CFLAGS)
+
 AM_CFLAGS =	$(LIBXML_CFLAGS)				\
 		$(WARN_CFLAGS)					\
 		$(LOCK_CHECKING_CFLAGS)				\

tests/Makefile.am

@@ -33,6 +33,8 @@ INCLUDES = \
 	-I$(top_srcdir)/src/conf \
 	$(GETTEXT_CPPFLAGS)
 
+WARN_CFLAGS += $(RELAXED_FRAME_LIMIT_CFLAGS)
+
 AM_CFLAGS = \
 	-Dabs_builddir="\"$(abs_builddir)\"" \
 	-Dabs_topbuilddir="\"$(abs_topbuilddir)\"" \

tools/Makefile.am

@@ -23,6 +23,8 @@ INCLUDES = \
 	-I$(top_srcdir)						\
 	$(GETTEXT_CPPFLAGS)
 
+WARN_CFLAGS += $(STRICT_FRAME_LIMIT_CFLAGS)
+
 AM_LDFLAGS = \
 	$(RELRO_LDFLAGS)					\
 	$(NO_INDIRECT_LDFLAGS)					\