cmake: Allow ENABLE_OPENGL option to be overridden on Linux aarch64

This option was originally disabled due to some devices not supporting OpenGL, however it was implemented by hardcoding the option to be set to OFF via CMAKE_DEPENDENT_OPTION. This change now allows the user to manually set ENABLE_OPENGL to ON in the CMake options, which was previously not possible.

Author: OpenSauce04

CMakeLists.txt

@@ -61,6 +61,14 @@ else()
     set(DEFAULT_ENABLE_LTO OFF)
 endif()
 
+# Disable OpenGL by default on Linux aarch64.
+# Some aarch64 devices running Linux don't support OpenGL, and users may encounter issues.
+if (LINUX AND CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64)
+    set(DEFAULT_ENABLE_OPENGL OFF)
+else()
+    set(DEFAULT_ENABLE_OPENGL ON)
+endif()
+
 option(ENABLE_SDL2 "Enable using SDL2" ON)
 CMAKE_DEPENDENT_OPTION(ENABLE_SDL2_FRONTEND "Enable the SDL2 frontend" OFF "ENABLE_SDL2;NOT ANDROID AND NOT IOS" OFF)
 option(USE_SYSTEM_SDL2 "Use the system SDL2 lib (instead of the bundled one)" OFF)
@@ -82,7 +90,7 @@ option(ENABLE_OPENAL "Enables the OpenAL audio backend" ON)
 CMAKE_DEPENDENT_OPTION(ENABLE_LIBUSB "Enable libusb for GameCube Adapter support" ON "NOT IOS" OFF)
 
 CMAKE_DEPENDENT_OPTION(ENABLE_SOFTWARE_RENDERER "Enables the software renderer" ON "NOT ANDROID" OFF)
-CMAKE_DEPENDENT_OPTION(ENABLE_OPENGL "Enables the OpenGL renderer" ON "NOT APPLE AND NOT (LINUX AND CMAKE_SYSTEM_PROCESSOR STREQUAL \"aarch64\")" OFF)
+CMAKE_DEPENDENT_OPTION(ENABLE_OPENGL "Enables the OpenGL renderer" ${DEFAULT_ENABLE_OPENGL} "NOT APPLE" OFF)
 option(ENABLE_VULKAN "Enables the Vulkan renderer" ON)
 
 option(USE_DISCORD_PRESENCE "Enables Discord Rich Presence" OFF)