mesa: Fix build with wayland and egl

When wayland and egl both are on then it enables the wayland
plugin which actually fails to build because its not finding wayland-protocol
xml templates in proper location which is recipe sysroot since
we are cross compiling

Fixes build errors e.g.
make[4]: *** No rule to make target `//usr/share/wayland-protocols/unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml', needed by `drivers/dri2/linux-dmabuf-unstable-v1-client-protocol.h'.  Stop.
make[4]: *** Waiting for unfinished jobs....

(From OE-Core rev: ff4762e94faa095abd7175810d1053fdd361058f)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/meta/recipes-graphics/mesa/files/cross-compile-WAYLAND_PROTOCOLS_DATADIR.patch b/meta/recipes-graphics/mesa/files/cross-compile-WAYLAND_PROTOCOLS_DATADIR.patch
new file mode 100644
index 0000000000..b4e3c4995f
--- /dev/null
+++ b/meta/recipes-graphics/mesa/files/cross-compile-WAYLAND_PROTOCOLS_DATADIR.patch
@@ -0,0 +1,24 @@
+use PKG_CHECK_VAR for defining WAYLAND_PROTOCOLS_DATADIR
+
+This allows to override the wayland-protocols pkgdatadir with the
+WAYLAND_PROTOCOLS_DATADIR from environment.
+
+pkgconfig would return an absolute path in /usr/share/wayland-protocols
+for the pkgdatadir value, which is not suitable for cross-compiling.
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Pending
+
+Index: mesa-18.1.2/configure.ac
+===================================================================
+--- mesa-18.1.2.orig/configure.ac
++++ mesa-18.1.2/configure.ac
+@@ -1808,7 +1808,7 @@ for plat in $platforms; do
+         PKG_CHECK_MODULES([WAYLAND_CLIENT], [wayland-client >= $WAYLAND_REQUIRED])
+         PKG_CHECK_MODULES([WAYLAND_SERVER], [wayland-server >= $WAYLAND_REQUIRED])
+         PKG_CHECK_MODULES([WAYLAND_PROTOCOLS], [wayland-protocols >= $WAYLAND_PROTOCOLS_REQUIRED])
+-        WAYLAND_PROTOCOLS_DATADIR=`$PKG_CONFIG --variable=pkgdatadir wayland-protocols`
++        PKG_CHECK_VAR([WAYLAND_PROTOCOLS_DATADIR], [wayland-protocols >= $WAYLAND_PROTOCOLS_REQUIRED], pkgdatadir)
+ 
+         AC_PATH_PROG([WAYLAND_SCANNER], [wayland-scanner], [:])
+