intel: Suppress some extremely noisy warnings

Warning about redundant declarations within the xorg headers hides
genuine warnings in our own code - disable them until the headers are
cleaned up.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

configure.ac

@@ -43,6 +43,11 @@ m4_ifndef([XORG_MACROS_VERSION],
 XORG_MACROS_VERSION(1.8)
 XORG_DEFAULT_OPTIONS
 
+# And disable a few very noisy warnings
+XORG_TESTSET_CFLAG([NOWARNFLAGS], [-Wno-cast-qual])
+XORG_TESTSET_CFLAG([NOWARNFLAGS], [-Wno-redundant-decls])
+AC_SUBST(NOWARNFLAGS)
+
 # Require X.Org server macros (i.e. XORG_DRIVER_CHECK_EXT) to check for required modules 
 m4_ifndef([XORG_DRIVER_CHECK_EXT],
           [m4_fatal([must install xorg-server macros before running autoconf/autogen.

src/Makefile.am

@@ -26,7 +26,13 @@ SUBDIRS = render_program legacy
 # _ladir passes a dummy rpath to libtool so the thing will actually link
 # TODO: -nostdlib/-Bstatic/-lgcc platform magic, not installing the .a, etc.
 
-AM_CFLAGS = @CWARNFLAGS@ @XORG_CFLAGS@ @DRM_CFLAGS@ @PCIACCESS_CFLAGS@
+AM_CFLAGS = \
+	@CWARNFLAGS@ \
+	@XORG_CFLAGS@ \
+	@DRM_CFLAGS@ \
+	@PCIACCESS_CFLAGS@ \
+	@NOWARNFLAGS@ \
+	$(NULL)
 
 intel_drv_la_LTLIBRARIES = intel_drv.la
 intel_drv_la_LDFLAGS = -module -avoid-version

src/sna/Makefile.am

@@ -27,6 +27,7 @@ AM_CFLAGS = \
 	@XORG_CFLAGS@ \
 	@UDEV_CFLAGS@ \
 	@DRM_CFLAGS@ \
+	@NOWARNFLAGS@
 	$(NULL)
 
 if VALGRIND

src/sna/brw/Makefile.am

@@ -29,6 +29,7 @@ AM_CFLAGS = \
 	@XORG_CFLAGS@ \
 	@UDEV_CFLAGS@ \
 	@DRM_CFLAGS@ \
+	@NOWARNFLAGS@ \
 	$(NULL)
 
 if DEBUG

src/sna/fb/Makefile.am

@@ -1,6 +1,6 @@
 noinst_LTLIBRARIES = libfb.la
 
-libfb_la_CFLAGS = @CWARNFLAGS@ @XORG_CFLAGS@
+libfb_la_CFLAGS = @CWARNFLAGS@ @XORG_CFLAGS@ @NOWARNFLAGS@
 libfb_la_LIBADD = $(PIXMAN_LIBS)
 
 libfb_la_SOURCES = 	\