Added support to linux - but with missing GL version error

Author: LessComplexity

CMakeLists.txt

@@ -6,19 +6,40 @@ project(${APP_NAME} LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 17)
 
-# Change this variable to `linux` to compile for linux
-set(COMPILE_PLATFORM win)
-# Uncomment the following line to compile for x86 architecture (32bit)
-# set(USE_X86 TRUE)
+# Set to x86 for x86 architecture or x64 for x64 architecture
+set(ARCHITECTURE_TO_USE x86)
 
-if (USE_X86)
-    SET(LINK_GL_LIBS ${CMAKE_SOURCE_DIR}/lib/${COMPILE_PLATFORM}/x86)
-    file(COPY ${CMAKE_SOURCE_DIR}/bin/${COMPILE_PLATFORM}/x86/glew32.dll DESTINATION ${CMAKE_BINARY_DIR}/)
+# Make the executable
+add_executable(${APP_NAME} main.cpp)
+
+if(WIN32)
+    # Neccessary variables
+    SET(LINK_GL_LIBS ${CMAKE_SOURCE_DIR}/lib/win/${ARCHITECTURE_TO_USE})
+    set(GLEW_SHARED_LIB ${CMAKE_SOURCE_DIR}/bin/win/${ARCHITECTURE_TO_USE}/glew32.dll)
+    set(GLEW_STATIC_LIB ${LINK_GL_LIBS}/glew32.lib)
+    set(GLFW_STATIC_LIB  ${LINK_GL_LIBS}/glfw3.lib)
+    # Copy the GLEW static lib
+    file(COPY ${GLEW_SHARED_LIB} DESTINATION ${CMAKE_BINARY_DIR}/)
+    find_package(OpenGL REQUIRED)
+    # Link libs
+    target_link_libraries(${APP_NAME} ${OPENGL_LIBRARIES} ${GLEW_SHARED_LIB} ${GLFW_SHARED_LIB})
 else()
-    SET(LINK_GL_LIBS ${CMAKE_SOURCE_DIR}/lib/${COMPILE_PLATFORM}/x64)
-    file(COPY ${CMAKE_SOURCE_DIR}/bin/${COMPILE_PLATFORM}/x64/glew32.dll DESTINATION ${CMAKE_BINARY_DIR}/)
-endif ()
+    SET(LINK_GL_LIBS ${CMAKE_SOURCE_DIR}/lib/linux)
+    set(GLFW_STATIC_LIB  ${LINK_GL_LIBS}/libglfw3.a)
+    set(GLEW_STATIC_LIB  ${LINK_GL_LIBS}/libGLEW.a)
+    set(GLEW_SHARED_LIB  ${CMAKE_SOURCE_DIR}/bin/linux/libGLEW.so.2.1)
 
-find_package(OpenGL)
-add_executable(${APP_NAME} main.cpp)
-target_link_libraries(${APP_NAME} ${OPENGL_gl_LIBRARY} ${LINK_GL_LIBS}/glfw3.lib ${LINK_GL_LIBS}/glew32.lib)
+    # Link linux dependencies
+    find_package(X11 REQUIRED)
+    find_package(Threads REQUIRED)
+    find_package(OpenGL REQUIRED)
+    include_directories(${X11_INCLUDE_DIR})
+    target_link_libraries(${APP_NAME}
+            ${OPENGL_LIBRARIES}
+            ${GLEW_SHARED_LIB}
+            ${GLEW_STATIC_LIB}
+            ${GLFW_STATIC_LIB}
+            Threads::Threads
+            ${X11_LIBRARIES}
+            ${CMAKE_DL_LIBS})
+endif()

bin/linux/libGLEW.so.2.1

@@ -0,0 +1,60 @@
+//========================================================================
+// GLFW 3.3 - www.glfw.org
+//------------------------------------------------------------------------
+// Copyright (c) 2010-2016 Camilla Löwy <[email protected]>
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would
+//    be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such, and must not
+//    be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source
+//    distribution.
+//
+//========================================================================
+// As glfw_config.h.in, this file is used by CMake to produce the
+// glfw_config.h configuration header file.  If you are adding a feature
+// requiring conditional compilation, this is where to add the macro.
+//========================================================================
+// As glfw_config.h, this file defines compile-time option macros for a
+// specific platform and development environment.  If you are using the
+// GLFW CMake files, modify glfw_config.h.in instead of this file.  If you
+// are using your own build system, make this file define the appropriate
+// macros in whatever way is suitable.
+//========================================================================
+
+// Define this to 1 if building GLFW for X11
+#define _GLFW_X11
+// Define this to 1 if building GLFW for Win32
+/* #undef _GLFW_WIN32 */
+// Define this to 1 if building GLFW for Cocoa
+/* #undef _GLFW_COCOA */
+// Define this to 1 if building GLFW for Wayland
+/* #undef _GLFW_WAYLAND */
+// Define this to 1 if building GLFW for OSMesa
+/* #undef _GLFW_OSMESA */
+
+// Define this to 1 if building as a shared library / dynamic library / DLL
+/* #undef _GLFW_BUILD_DLL */
+// Define this to 1 to use Vulkan loader linked statically into application
+/* #undef _GLFW_VULKAN_STATIC */
+
+// Define this to 1 to force use of high-performance GPU on hybrid systems
+/* #undef _GLFW_USE_HYBRID_HPG */
+
+// Define this to 1 if xkbcommon supports the compose key
+/* #undef HAVE_XKBCOMMON_COMPOSE_H */
+// Define this to 1 if the libc supports memfd_create()
+/* #undef HAVE_MEMFD_CREATE */
+

lib/linux/glfw_config.h

@@ -1,15 +1,27 @@
+#define GLEW_STATIC
 #include "GL/glew.h"
 #include "GLFW/glfw3.h"
 #include <iostream>
 
 int main() {
-    if(!glfwInit()) exit(EXIT_FAILURE);
+    if(!glfwInit()) {
+        exit(EXIT_FAILURE);
+    }
 
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
     GLFWwindow* window = glfwCreateWindow(600, 300, "Test", NULL, NULL);
     glfwMakeContextCurrent(window);
-    if(glewInit() != GLEW_OK) exit(EXIT_FAILURE);
+    if(window) {
+        std::cerr << "Failed to create window" << std::endl;
+        glfwTerminate();
+        exit(EXIT_FAILURE);
+    }
+
+    if(GLenum err = glewInit(); err != GLEW_OK) {
+        std::cout << glewGetErrorString(err) << std::endl;
+        exit(EXIT_FAILURE);
+    }
     glfwSwapInterval(1); // Allow VSync
 
     while(!glfwWindowShouldClose(window)) {