Hi Ross,

I tested this patch and found it also need to add libxkbcommon as a dependency in PACKAGECONFIG[wayland]. Otherwise the wayland support would skip if libxkbcommon is not built before even if we already enable video-wayland.

Reproduce steps:
bitbake libxkbcommon -c clean
bitbake libsdl2 -c cleansstate && bitbake libsdl2

config.log:
[snip]
configure:19347: checking for Wayland support
configure:19357: result: no
[snip]

Thanks,
Yi

在 2015年11月11日 21:40, Ross Burton 写道:
The Wayland support requires GLES2 to be enabled as otherwise the EGL support
code in SDL2 isn't enabled.

| In file included from 
.../SDL2-2.0.3/src/video/wayland/SDL_waylandvideo.c:34:0:
| .../SDL2-2.0.3/src/video/wayland/SDL_waylandvideo.c: In function 
'Wayland_CreateDevice':
| .../SDL2-2.0.3/src/video/wayland/SDL_waylandopengles.h:38:38: error: 
'SDL_EGL_GetSwapInterval' undeclared (first use in this function)
|  #define Wayland_GLES_GetSwapInterval SDL_EGL_GetSwapInterval

Solve this by adding gles2 to the Wayland PACKAGECONFIG option.

Signed-off-by: Ross Burton <ross.bur...@intel.com>
---
  meta/recipes-graphics/libsdl2/libsdl2_2.0.3.bb | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/recipes-graphics/libsdl2/libsdl2_2.0.3.bb 
b/meta/recipes-graphics/libsdl2/libsdl2_2.0.3.bb
index 97f64f3..f138f97 100644
--- a/meta/recipes-graphics/libsdl2/libsdl2_2.0.3.bb
+++ b/meta/recipes-graphics/libsdl2/libsdl2_2.0.3.bb
@@ -39,7 +39,7 @@ PACKAGECONFIG ??= " \
      ${@bb.utils.contains('DISTRO_FEATURES', 'alsa', 'alsa', '', d)} \
      ${@bb.utils.contains('DISTRO_FEATURES', 'directfb', 'directfb', '', d)} \
      ${@bb.utils.contains('DISTRO_FEATURES', 'pulseaudio', 'pulseaudio', '', 
d)} \
-    ${@bb.utils.contains('DISTRO_FEATURES', 'wayland', 'wayland', '', d)} \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'wayland', 'wayland gles2', '', 
d)} \
      ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'x11', '', d)} \
  "
  PACKAGECONFIG[alsa]       = "--enable-alsa 
--disable-alsatest,--disable-alsa,alsa-lib,"

--
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