[Buildroot] [PATCH 2/3] libgtk3: gdk-wayland backend depends on libX11

[Peter Seiderer]

Hello Vicente,

On Tue, 14 Mar 2017 11:46:27 +0000, Vicente Olivert Riera <Vincent.Riera at imgtec.com> wrote:

> Otherwise it will fail to compile with an error like this one:
> 
> [Vincent: paths shortened for readability]
> 
>   CC       gdkglcontext-wayland.lo
> In file included from /usr/include/epoxy/egl_generated.h:11:0,
>                  from /usr/include/epoxy/egl.h:44,
>                  from gdkglcontext-wayland.h:32,
>                  from gdkglcontext-wayland.c:24:
> /usr/include/EGL/eglplatform.h:119:22: fatal error: X11/Xlib.h: No such
> file or directory
>  #include <X11/Xlib.h>
>                       ^
> compilation terminated.
> make[6]: *** [Makefile:682: gdkglcontext-wayland.lo] Error 1
> 

Qt has a similare build failure solved by -DQT_EGL_NO_X11 which is used by
qt5base-5.8.0/src/platformsupport/eglconvenience/qt_egl_p.h:

#ifdef QT_EGL_NO_X11
# define MESA_EGL_NO_X11_HEADERS // MESA
# define WIN_INTERFACE_CUSTOM    // NV
#endif // QT_EGL_NO_X11

#ifdef QT_EGL_WAYLAND
# define WAYLAND // NV
#endif // QT_EGL_WAYLAND

#include <EGL/egl.h>
#include <EGL/eglext.h>

Maybe something similare (define MESA_EGL_NO_X11_HEADERS) works for
the gdk-wayland backend?

Regards,
Peter


> Signed-off-by: Vicente Olivert Riera <Vincent.Riera at imgtec.com>
> ---
>  package/libgtk3/Config.in | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/package/libgtk3/Config.in b/package/libgtk3/Config.in
> index 738f865..9e0721d 100644
> --- a/package/libgtk3/Config.in
> +++ b/package/libgtk3/Config.in
> @@ -62,11 +62,15 @@ comment "Wayland GDK backend needs an OpenGL EGL backend provided by mesa3d w/ h
>  	depends on !BR2_PACKAGE_MESA3D_OPENGL_EGL || \
>  		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
>  
> +comment "Wayland GDK backend needs libX11 support"
> +	depends on !BR2_PACKAGE_XLIB_LIBX11
> +
>  config BR2_PACKAGE_LIBGTK3_WAYLAND
>  	bool "Wayland GDK backend"
>  	default y
>  	depends on BR2_PACKAGE_HAS_LIBEGL_WAYLAND
>  	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
> +	depends on BR2_PACKAGE_XLIB_LIBX11
>  	select BR2_PACKAGE_WAYLAND
>  	select BR2_PACKAGE_WAYLAND_PROTOCOLS
>  	select BR2_PACKAGE_LIBXKBCOMMON