[mutter] EGL: Include EGL/eglmesaext.h

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit a444a4c5f58ea516ad3cd9d6ddc0056c3ca9bc90
Author: Jan Alexander Steffens (heftig) <jan steffens gmail com>
Date:   Sun Oct 20 12:04:31 2019 +0200

    EGL: Include EGL/eglmesaext.h
    
    The eglext.h shipped by libglvnd does not include the Mesa extensions,
    unlike the header shipped in Mesa.
    
    Fixes https://gitlab.gnome.org/GNOME/mutter/issues/876

 cogl/cogl/meson.build       | 2 +-
 src/backends/meta-egl-ext.h | 1 +
 src/backends/meta-egl.c     | 1 +
 src/backends/meta-egl.h     | 1 +
 4 files changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/cogl/cogl/meson.build b/cogl/cogl/meson.build
index 261955796..b0e66bff3 100644
--- a/cogl/cogl/meson.build
+++ b/cogl/cogl/meson.build
@@ -48,7 +48,7 @@ cogl_gl_header_h = configure_file(
 built_headers += [cogl_gl_header_h]
 
 if have_egl
-  cogl_egl_includes_string = '#include <EGL/egl.h>\n#include <EGL/eglext.h>'
+  cogl_egl_includes_string = '#include <EGL/egl.h>\n#include <EGL/eglext.h>\n#include <EGL/eglmesaext.h>'
 else
   cogl_egl_includes_string = ''
 endif
diff --git a/src/backends/meta-egl-ext.h b/src/backends/meta-egl-ext.h
index 8705e7d5b..db0b74f76 100644
--- a/src/backends/meta-egl-ext.h
+++ b/src/backends/meta-egl-ext.h
@@ -29,6 +29,7 @@
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
+#include <EGL/eglmesaext.h>
 
 /*
  * This is a little different to the tests shipped with EGL implementations,
diff --git a/src/backends/meta-egl.c b/src/backends/meta-egl.c
index 6554be935..fdeff4f77 100644
--- a/src/backends/meta-egl.c
+++ b/src/backends/meta-egl.c
@@ -27,6 +27,7 @@
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
+#include <EGL/eglmesaext.h>
 #include <gio/gio.h>
 #include <glib.h>
 #include <glib-object.h>
diff --git a/src/backends/meta-egl.h b/src/backends/meta-egl.h
index f2a816445..4591e7d85 100644
--- a/src/backends/meta-egl.h
+++ b/src/backends/meta-egl.h
@@ -28,6 +28,7 @@
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
+#include <EGL/eglmesaext.h>
 #include <glib-object.h>
 
 #define META_EGL_ERROR meta_egl_error_quark ()