From a3101c9454b7451c0e3959820d6d2e1b409d2e63 Mon Sep 17 00:00:00 2001
From: Elias Naur <mail@eliasnaur.com>
Date: Fri, 20 Mar 2020 20:58:17 +0100
Subject: [PATCH] app/internal/window,app/internal/egl: avoid X11 dependency in
 EGL

EGL is window system agnostic, but its egl.h header includex X11
headers by default. Use the MESA_EGL_NO_X11_HEADERS define to avoid
it, fixing the "nox11" build for systems without X11 headers installed.

Fixes #91

Signed-off-by: Elias Naur <mail@eliasnaur.com>
---
 app/internal/egl/egl_unix.go       | 1 +
 app/internal/window/egl_wayland.go | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/internal/egl/egl_unix.go b/app/internal/egl/egl_unix.go
index 1eba3d49..e23660ff 100644
--- a/app/internal/egl/egl_unix.go
+++ b/app/internal/egl/egl_unix.go
@@ -10,6 +10,7 @@ package egl
 #cgo freebsd LDFLAGS: -L/usr/local/lib
 #cgo openbsd CFLAGS: -I/usr/X11R6/include
 #cgo openbsd LDFLAGS: -L/usr/X11R6/lib
+#cgo CFLAGS: -DMESA_EGL_NO_X11_HEADERS
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
diff --git a/app/internal/window/egl_wayland.go b/app/internal/window/egl_wayland.go
index b7bc32bb..c4115fb5 100644
--- a/app/internal/window/egl_wayland.go
+++ b/app/internal/window/egl_wayland.go
@@ -13,7 +13,7 @@ import (
 
 /*
 #cgo LDFLAGS: -lwayland-egl
-#cgo CFLAGS: -I/usr/include/wayland
+#cgo CFLAGS: -I/usr/include/wayland -DMESA_EGL_NO_X11_HEADERS
 
 #include <EGL/egl.h>
 #include <wayland-client.h>