From ad7c72c1648a710c2d091993c9249bd3d2b607a5 Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Sat, 26 Feb 2022 15:16:38 +0100
Subject: Remove direct OpenGL(ES) dependency

IrrlichtMt now provides this for us (see last commit)
fixes #12041
---
 src/CMakeLists.txt | 31 ++-----------------------------
 1 file changed, 2 insertions(+), 29 deletions(-)

(limited to 'src')

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 57baf20bd..1d6177ba3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -98,8 +98,8 @@ if(BUILD_CLIENT AND ENABLE_SOUND)
 	endif()
 endif()
 
-
-option(ENABLE_GLES "Use OpenGL ES instead of OpenGL" FALSE)
+# TODO: this should be removed one day, we can enable it unconditionally
+option(ENABLE_GLES "Enable extra support code for OpenGL ES" FALSE)
 mark_as_advanced(ENABLE_GLES)
 
 option(ENABLE_TOUCH "Enable Touchscreen support" FALSE)
@@ -107,21 +107,6 @@ if(ENABLE_TOUCH)
 	add_definitions(-DHAVE_TOUCHSCREENGUI)
 endif()
 
-if(BUILD_CLIENT)
-	# transitive dependency from Irrlicht (see longer explanation below)
-	if(NOT WIN32)
-		if(ENABLE_GLES)
-			find_package(OpenGLES2 REQUIRED)
-		else()
-			set(OPENGL_GL_PREFERENCE "LEGACY" CACHE STRING
-				"See CMake Policy CMP0072 for reference. GLVND is broken on some nvidia setups")
-			set(OpenGL_GL_PREFERENCE ${OPENGL_GL_PREFERENCE})
-
-			find_package(OpenGL REQUIRED)
-		endif()
-	endif()
-endif()
-
 if(BUILD_CLIENT)
 	find_package(Freetype REQUIRED)
 endif()
@@ -544,18 +529,6 @@ if(BUILD_CLIENT)
 		)
 	endif()
 
-	if(ENABLE_GLES)
-		target_link_libraries(
-			${PROJECT_NAME}
-			${OPENGLES2_LIBRARIES}
-			${EGL_LIBRARIES}
-		)
-	else()
-		target_link_libraries(
-			${PROJECT_NAME}
-			${OPENGL_LIBRARIES}
-		)
-	endif()
 	if(USE_GETTEXT)
 		target_link_libraries(
 			${PROJECT_NAME}
-- 
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