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when crosscompile X86_Linux on windows how does the OpenGLdrv module link the openGL dynamic library

when I try to modifiy the OpenGLDrv module int the OpenGLLinux.h and openGLLinux.cpp for using openGLES in Linux,no compile error ,but lots of undefine reference to OpenglES function, when I did not modify the OpenGLLinux.h and openGLLinux.cpp,the compile and link success. so I am curious about how did OpenGLDrv module find the OpenGL library,such as libGL.so,I found no libGL.so in the project.

Product Version: UE 4.10
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asked Nov 20 '15 at 02:51 AM in Linux

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We don't link to it as that would be indeed problematic. All OpenGL functions are pointers declared by ENUM_GL_ENTRYPOINTS_ALL macro (see OpenGLLinux.h/.cpp) and are acquired via SDL_GL_GetProcAddress() after SDL has loaded (via dlopen()) the correct libGL.so.

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answered Nov 20 '15 at 02:56 AM

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avatar image junqingmark Nov 20 '15 at 05:21 AM


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