Use a compile test for EGL support

app/app.pro

@@ -90,10 +90,6 @@ unix:!macx {
             CONFIG += libva
         }
 
-        packagesExist(egl) {
-            CONFIG += egl
-        }
-
         packagesExist(vdpau) {
             CONFIG += libvdpau
         }
@@ -268,7 +264,7 @@ libdrm {
     SOURCES += streaming/video/ffmpeg-renderers/drm.cpp
     HEADERS += streaming/video/ffmpeg-renderers/drm.h
 }
-egl {
+config_EGL {
     message(EGL renderer selected)
 
     DEFINES += HAVE_EGL

config.tests/EGL/EGL.pro

@@ -0,0 +1,4 @@
+SOURCES = main.cpp
+
+CONFIG += link_pkgconfig
+PKGCONFIG += sdl2 egl

config.tests/EGL/main.cpp

@@ -0,0 +1,10 @@
+#include <SDL_egl.h>
+#include <SDL_opengles2.h>
+
+#ifndef EGL_VERSION_1_5
+#error EGLRenderer requires EGL 1.5
+#endif
+
+#ifndef GL_ES_VERSION_2_0
+#error EGLRenderer requires OpenGL ES 2.0
+#endif

moonlight-qt.pro

@@ -22,3 +22,4 @@ CONFIG += debug_and_release
 # Run our compile tests
 load(configure)
 qtCompileTest(SL)
+qtCompileTest(EGL)