fix(CMAKE) gl3w compilation fixed

CMakeLists.txt

@@ -1,11 +1,12 @@
 project(gbemu CXX C) #LANGUAGES CXX
-cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
 message("S" ${CMAKE_CXX_COMPILER})
 ##if(NOT CMAKE_CXX_EXTENSIONS)
 ##	set(CMAKE_CXX_EXTENSIONS ON)
 ##endif()
 ##set(CMAKE_CXX_EXTENSIONS ON)
 ##set(CXX_STANDARD 20)
+set(CMP0072 NEW)
 if (UNIX)
 add_compile_options(
 #		-Wc++11-extensions
@@ -33,6 +34,9 @@ endif()
 #
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/sdl2")
 set(CMAKE_BUILD_TYPE Debug)
+# set(OpenGL_GL_PREFERENCE GLVND)
+
+
 
 if (WIN32)
 #	set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} /W3 /MTd")
@@ -47,7 +51,7 @@ set(SDL2_LIBRARIES "${CMAKE_BINARY_DIR}/extern/SDL/libSDL2maind.lib")
 #else ()
 #	set(SDL2_LIBRARIES "${PROJECT_SOURCE_DIR}/extern/sdl2_win/lib/x86/SDL2.lib;${PROJECT_SOURCE_DIR}/extern/sdl2_win/lib/x86/SDL2main.lib")
 #endif ()
-
+set(OpenGL_GL_PREFERENCE GLVND)
 elseif(UNIX AND NOT APPLE)
 #	find_package(SDL2 REQUIRED)
 	set(SDL2_INCLUDE_DIRS "${CMAKE_BINARY_DIR}/extern/SDL/include/")
@@ -63,7 +67,19 @@ include_directories("${PROJECT_SOURCE_DIR}/extern/SDL/include")
 set(SDL2_LIBRARIES "${CMAKE_BINARY_DIR}/extern/SDL/libSDL2maind.a;${CMAKE_BINARY_DIR}/extern/SDL/libSDL2d.a")
 add_subdirectory(extern/SDL)
 endif()
-execute_process(COMMAND python gl3w_gen.py --root ${PROJECT_BINARY_DIR}/extern/gl3w WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/extern/gl3w)
+#execute_process(COMMAND python gl3w_gen.py --root ${PROJECT_BINARY_DIR}/extern/gl3w WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/extern/gl3w)
+# set(GL3W_DIR "${PROJECT_SOURCE_DIR}/extern/gl3w/cmake/")
+# find_package(GL3W REQUIRED)
+set(GL3W_ROOT "${CMAKE_SOURCE_DIR}/extern/gl3w")
+set(GL3W_INC "${GL3W_ROOT}/include")
+set(GL3W_SRC "${GL3W_ROOT}/src/gl3w.c")
+
+if (NOT EXISTS ${GL3W_SRC})
+message(STATUS "Generating gl3w source files")
+execute_process(COMMAND python gl3w_gen.py --root ${PROJECT_BINARY_DIR}/extern/gl3w
+WORKING_DIRECTORY ${GL3W_ROOT})
+endif()
+
 include_directories(${SDL2_INCLUDE_DIRS})
 add_subdirectory(extern/gl3w)
 add_subdirectory(lib)