wayland: Don't commit and ship generated files

I believe shipping wayland-drm-client-protocol.h is wrong: The header
should always be generated by the wayland-scanner that matches the
runtime wayland version. Currently when someone clones the repo and
builds, the shipped version is used.

Remove wayland-drm-client-protocol.h from source tree, modify the
build so the header is considered a built source file, and make
configure fail if wayland is enabled but wayland-scanner is not found.

Fixes #34.

Signed-off-by: Jussi Kukkonen <[email protected]>

configure.ac

@@ -292,6 +292,9 @@ if test "$enable_wayland" = "yes"; then
         WAYLAND_PREFIX=`$PKG_CONFIG --variable=prefix wayland-client`
         AC_PATH_PROG([WAYLAND_SCANNER], [wayland-scanner],,
                      [${WAYLAND_PREFIX}/bin$PATH_SEPARATOR$PATH])
+        if test "x$WAYLAND_SCANNER" = "x"; then
+            AC_MSG_ERROR([wayland-scanner not found: Install it or use --disable-wayland])
+        fi
 
         AC_DEFINE([HAVE_VA_WAYLAND], [1],
                   [Defined to 1 if VA/Wayland API is built])

va/wayland/Makefile.am

@@ -53,7 +53,7 @@ protocol_source_h = \
 noinst_LTLIBRARIES		= libva_wayland.la
 libva_waylandincludedir		= ${includedir}/va
 libva_waylandinclude_HEADERS	= $(source_h)
-libva_wayland_la_SOURCES	= $(source_c) $(protocol_source_h)
+libva_wayland_la_SOURCES	= $(source_c)
 noinst_HEADERS			= $(source_h_priv)
 
 # Wayland protocol
@@ -65,5 +65,8 @@ EXTRA_DIST = \
 	wayland-drm.xml         \
 	$(NULL)
 
+BUILT_SOURCES = $(protocol_source_h)
+CLEANFILES = $(BUILT_SOURCES)
+
 # Extra clean files so that maintainer-clean removes *everything*
 MAINTAINERCLEANFILES = Makefile.in