CMake: improved handling of OpenGL and X11 libraries on linux

Author: TheMostDiligent

CMakeLists.txt

@@ -469,35 +469,40 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
     endif()
 endif()
 
-if(PLATFORM_MACOS)
+if(PLATFORM_LINUX)
+    find_library(OPENGL_LIBRARY GL)
+    if (NOT OPENGL_LIBRARY)
+        message(FATAL_ERROR "Failed to find OpenGL library")
+    endif()
+elseif(PLATFORM_MACOS)
     find_library(APP_KIT AppKit)
     if (NOT APP_KIT)
-            message(FATAL_ERROR "AppKit not found")
+            message(FATAL_ERROR "Failed to find AppKit framework")
     endif()
 elseif(PLATFORM_IOS)
     find_library(CORE_FOUNDATION CoreFoundation)
     if(NOT CORE_FOUNDATION)
-        message(FATAL_ERROR "Cannot find CoreFoundation framework")
+        message(FATAL_ERROR "Failed to find CoreFoundation framework")
     endif()
 
     find_library(FOUNDATION Foundation)
     if(NOT FOUNDATION)
-        message(FATAL_ERROR "Cannot find Foundation framework")
+        message(FATAL_ERROR "Failed to find Foundation framework")
     endif()
 
     find_library(OPENGLES OpenGLES)
     if(NOT OPENGLES)
-        message(FATAL_ERROR "Cannot find OpenGLES framework")
+        message(FATAL_ERROR "Failed to find OpenGLES framework")
     endif()
 elseif(PLATFORM_TVOS)
     find_library(CORE_FOUNDATION CoreFoundation)
     if(NOT CORE_FOUNDATION)
-        message(FATAL_ERROR "Cannot find CoreFoundation framework")
+        message(FATAL_ERROR "Failed to find CoreFoundation framework")
     endif()
 
     find_library(FOUNDATION Foundation)
     if(NOT FOUNDATION)
-        message(FATAL_ERROR "Cannot find Foundation framework")
+        message(FATAL_ERROR "Failed to find Foundation framework")
     endif()
 endif()
 

Graphics/Archiver/CMakeLists.txt

@@ -132,7 +132,8 @@ if(GL_SUPPORTED OR GLES_SUPPORTED)
     if(PLATFORM_WIN32)
         target_link_libraries(Diligent-Archiver-static PRIVATE GLEW::glew opengl32.lib)
     elseif(PLATFORM_LINUX)
-        target_link_libraries(Diligent-Archiver-static PRIVATE GLEW::glew GL X11)
+        find_package(X11 REQUIRED)
+        target_link_libraries(Diligent-Archiver-static PRIVATE GLEW::glew ${OPENGL_LIBRARY} X11::X11)
     elseif(PLATFORM_MACOS)
         find_package(OpenGL REQUIRED)
         target_link_libraries(Diligent-Archiver-static PRIVATE GLEW::glew ${OPENGL_LIBRARY})

Graphics/GraphicsEngineOpenGL/CMakeLists.txt

@@ -198,7 +198,8 @@ if(PLATFORM_WIN32)
 elseif(PLATFORM_ANDROID)
     set(PRIVATE_DEPENDENCIES ${PRIVATE_DEPENDENCIES} GLESv3 EGL)
 elseif(PLATFORM_LINUX)
-    set(PRIVATE_DEPENDENCIES ${PRIVATE_DEPENDENCIES} GLEW::glew GL X11)
+    find_package(X11 REQUIRED)
+    set(PRIVATE_DEPENDENCIES ${PRIVATE_DEPENDENCIES} GLEW::glew ${OPENGL_LIBRARY} X11::X11)
 elseif(PLATFORM_MACOS)
     find_package(OpenGL REQUIRED)
     set(PRIVATE_DEPENDENCIES ${PRIVATE_DEPENDENCIES} GLEW::glew ${OPENGL_LIBRARY})