Moved DLL entry-point for GCC into glew.c rather than a standalone file

included using CMake.

auto/src/glew_init_tail.c

@@ -53,3 +53,12 @@ GLenum GLEWAPIENTRY glewInit (void)
   return r;
 #endif /* _WIN32 */
 }
+
+#if defined(_WIN32) && defined(GLEW_BUILD) && defined(__GNUC__)
+/* GCC requires a DLL entry point even without any standard library included. */
+/* Types extracted from windows.h to avoid polluting the rest of the file. */
+int __stdcall DllMainCRTStartup(void* instance, unsigned reason, void* reserved)
+{
+  return 1;
+}
+#endif

build/cmake/CMakeLists.txt

@@ -78,10 +78,6 @@ set (GLEW_SRC_FILES ${GLEW_DIR}/src/glew.c)
 
 if (WIN32)
   list (APPEND GLEW_SRC_FILES ${GLEW_DIR}/build/glew.rc)
-  if ((CMAKE_C_COMPILER_ID MATCHES "GNU") OR (CMAKE_C_COMPILER_ID MATCHES "Clang"))
-    # GCC can't handle not having a DLL entry point, so give it a fake one
-    list (APPEND GLEW_SRC_FILES ${GLEW_DIR}/src/gcc_dll_entry.c)
-  endif ()
 endif ()
 
 add_library (glew SHARED ${GLEW_SRC_FILES})

src/gcc_dll_entry.c

-#ifdef GLEW_BUILD
-#include <windows.h>
-BOOL WINAPI DllMainCRTStartup(HINSTANCE instance, DWORD reason, LPVOID reserved)
-{
-  return TRUE;
-}
-#endif
\ No newline at end of file