使用GLEW创建窗口遇未解析外部符号glewExperimental链接错误求助

Hey there, let's work through that unresolved external symbol error for glewExperimental you're facing. Even though you've compiled the library and confirmed linking, there are a few common gotchas that might be causing this. Here's what to check:

1. Match Library Build Type to Your Project #

Linker errors often pop up when there's a mismatch between your project's build configuration and the GLEW library you're linking:

• If you're building in Debug mode, make sure you're linking the Debug version of GLEW (usually named glew32d.lib on Windows). Release mode uses glew32.lib. Mixing these will lead to missing symbols.
• Double-check 32-bit vs 64-bit compatibility: Your project's target architecture (x86/x64) must match the architecture of the GLEW library you compiled or downloaded.

2. Define the Correct Linkage Macro #

GLEW behaves differently depending on whether you're using static or dynamic linking, and you need to define the right macro before including the header:

• For static linking, add #define GLEW_STATIC before including <GL/glew.h> in your code:

  #define GLEW_STATIC
  #include <GL/glew.h>
  #include <GLFW/glfw3.h>
  

  If you skip this, the compiler will look for dynamic library export symbols, which won't exist in your static library.
• For dynamic linking, ensure GLEW_SHARED is defined (this is often the default, but it's worth verifying).

3. Verify Your Custom GLEW Build Settings #

Since you compiled GLEW yourself, double-check these build options:

• If using CMake, confirm whether BUILD_SHARED_LIBS was set to ON (dynamic) or OFF (static) — this must match your project's linkage choice.
• Make sure you didn't disable any critical features during compilation. Stick to the default build settings unless you have a specific reason to change them, as custom flags can accidentally exclude symbols like glewExperimental.

4. Double-Check Linker Inputs #

• In MSVC: Right-click your project → Properties → Linker → Input → Additional Dependencies. Ensure the correct GLEW library name is listed, and that the library's directory is added to Linker → General → Additional Library Directories.
• In MinGW/GCC: When compiling, make sure you're passing the correct linker flag (e.g., -lglew32d for Debug static, -lglew32 for Release static). Also, ensure the library path is included with -L/path/to/glew/libs.

Quick Check of Your Code Snippet #

Looking at your code, the issue is unlikely to be in the logic itself — it's almost certainly a linkage/build mismatch. Just to be thorough, ensure that glfwMakeContextCurrent(handle) is called before any GLEW calls (which you are doing correctly), since GLEW needs a valid OpenGL context to initialize.

内容的提问来源于stack exchange，提问作者sakura