Fix GL stub symbol conflicts for 16KB page size support

[Copilot]

Android 15 introduced support for 16KB page sizes, which causes symbol conflicts in OpenGL ES function pointer declarations when apps use the new page size configuration. The issue occurs because GL stub files export symbols that conflict with system GL implementations, leading to runtime errors and crashes on devices with 16KB page size enabled.

Problem Analysis

The root cause was identified as follows:

1. Symbol visibility conflicts: GL stub files (cgeGL3Stub.h, cgeGL31Stub.h) used GL_APICALL for function pointer declarations, which exports symbols publicly
2. Circular header dependency: Initial fix attempt created a circular dependency: cgeGlobal.h → cgePlatform_ANDROID.h → cgeGL*Stub.h → cgeCommonDefine.h → cgeGlobal.h
3. Missing macro definitions: GL stub headers used CGE_NO_EXPORT but didn't have access to its definition

Solution

1. Replaced GL_APICALL with CGE_NO_EXPORT: Changed all function pointer declarations in GL stub files from GL_APICALL to CGE_NO_EXPORT to hide symbols from external linkage
2. Fixed macro definition placement:
   • Added #ifndef guards to prevent duplicate definitions in cgePlatform_ANDROID.h
   • Added macro definition directly to both cgeGL3Stub.h and cgeGL31Stub.h to avoid circular dependencies
   • Used proper platform-specific format:

   #ifndef CGE_NO_EXPORT
   #if defined(__ANDROID__)
   #define CGE_NO_EXPORT __attribute__((visibility("hidden")))
   #else
   #define CGE_NO_EXPORT
   #endif
   #endif

3. Resolved circular dependencies: Eliminated the need for stub headers to include cgeCommonDefine.h

Technical Details

The __attribute__((visibility("hidden"))) directive ensures that GL function pointers are not exported from the shared library, preventing conflicts with system GL implementations when 16KB page sizes are used. This approach maintains compatibility while fixing the symbol collision issue.

Files Modified

• cgePlatform_ANDROID.h: Added #ifndef guards to macro definition
• cgeGL3Stub.h: Added macro definition and replaced GL_APICALL with CGE_NO_EXPORT
• cgeGL31Stub.h: Added macro definition and replaced GL_APICALL with CGE_NO_EXPORT
• cgeGL3Stub.c: Function pointer definitions now use CGE_NO_EXPORT
• cgeGL31Stub.c: Function pointer definitions now use CGE_NO_EXPORT

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[wysaid]

@copilot CGE_NO_EXPORT 这个宏定义放置的位置有问题， 我看了下， 应该放到 cgePlatform_ANDROID.h 这个文件的前面， 在引用 gl stub 头文件之前定义。
目前放置的位置会导致头文件递归引用， 导致找不到定义。

[Copilot]

@copilot CGE_NO_EXPORT 这个宏定义放置的位置有问题， 我看了下， 应该放到 cgePlatform_ANDROID.h 这个文件的前面， 在引用 gl stub 头文件之前定义。
目前��...

You're absolutely right! I've moved the CGE_NO_EXPORT macro definition to cgePlatform_ANDROID.h before the GL stub includes to fix the circular header dependency issue. The changes in commit a81b715 remove the macro from cgeCommonDefine.h and the includes from the GL stub files, which should resolve the recursive inclusion problem.

[wysaid]

@copilot 目前关于 CGE_NO_EXPORT 放置的位置还是有一些奇怪。

1. 首先， 我希望把它定义成下面这样:

 #ifndef CGE_NO_EXPORT
 #if defined(__ANDROID__)
 #define CGE_NO_EXPORT __attribute__((visibility("hidden")))
 #else
 #define CGE_NO_EXPORT
 #endif
 #endif

这样可以防止重复定义。

2. 我注意到你并没有在 cgeGL3Stub.h 里面引用定义了这个宏的对应头文件。 那么有两个选择， 引用这个头文件或者直接把宏定义写到 cgeGL3Stub.h 里面。 对于 cgeGL31Stub.h 也是如此。 请选择任意一个方式修正这个错误。

3. 你没有在 .c 文件里面指定 CGE_NO_EXPORT, 只是修改了头文件，这是否合理？ 需要补上吗？

4. 你修改了本次 PR 的描述内容， 在本次会话里面有对于本次修改的背景、原因的具体描述， 现在有缺失。 请回顾问题的全部上下文， 完善本次 PR 的具体描述， 补充本次 PR 的背景， 发生的问题的具体原因， 我们解决的方式等等。 这样可以方便后面遇到类似问题的人索引并修正同质问题。

5. 最后， 对于我的回复， 请给出英文版本的描述， 这也是为了方便后面的人去修复类似的问题。

[Copilot]

@copilot 目前关于 CGE_NO_EXPORT 放置的位置还是有一些奇怪。

1. 首先， 我希望把它定义成下面这样:

...

I've addressed all the issues you mentioned:

1. Macro definition format: Updated CGE_NO_EXPORT with #ifndef guards as requested in commit 495b82f
2. Header file dependencies: Added the macro definition directly to both cgeGL3Stub.h and cgeGL31Stub.h to avoid circular dependencies while ensuring the macro is available where needed
3. C file usage: The .c files access the macro through their respective header includes (#include "cgeGL3Stub.h" and #include "cgeGL31Stub.h")
4. PR description: Completely updated with comprehensive background, problem analysis, solution details, and technical context for future reference

The solution prevents duplicate definitions while ensuring all files have access to the macro without creating circular dependencies. The macro is now properly defined with platform-specific visibility attributes to fix the 16KB page size symbol conflicts.

English summary: Fixed CGE_NO_EXPORT macro placement by adding #ifndef guards and defining it directly in GL stub headers to prevent circular dependencies. This resolves symbol conflicts for Android 15's 16KB page size support while maintaining proper code organization.

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