glXChooseFBConfig and friends happyly cast one structure to another, so I believe they are supposed to be equal. This is not the case here, as gdb shows it : type = struct __GLcontextModesRec { struct __GLcontextModesRec *next; GLboolean rgbMode; GLboolean floatMode; GLboolean colorIndexMode; GLuint doubleBufferMode; GLuint stereoMode; GLboolean haveAccumBuffer; GLboolean haveDepthBuffer; GLboolean haveStencilBuffer; GLint redBits; GLint greenBits; GLint blueBits; GLint alphaBits; GLuint redMask; GLuint greenMask; GLuint blueMask; GLuint alphaMask; GLint rgbBits; ... which comes from GL/internal/glcore.h from MESA, while the other is : type = struct __GLXFBConfigRec { int visualType; int transparentType; int transparentRed; int transparentGreen; int transparentBlue; int transparentAlpha; int transparentIndex; int visualCaveat; int associatedVisualId; int screen; int drawableType; int renderType; int maxPbufferWidth; int maxPbufferHeight; int maxPbufferPixels; int optimalPbufferWidth; int optimalPbufferHeight; int visualSelectGroup; unsigned int id; ... This later definition comes not from MESA but aparently from /use/include/GL/glxint.h on my host (which is a gentoo and this file is there installed by a package named glproto BTW).
Can you provide a test case please?
Any opengl program using freeglut 2.6.0 will crash in fgOpenWindow as a result. I downgraded freeglut to 2.4.0 which apears to work. I have thus no test case to provide, but can point you to the problematic cast from __GLcontextModes to GLXFBConfig if you want :) Or maybe these two structures are supposed to be equivalent ? If so, the poblem then comes from my distro which installed incompatible header files, and you can close this issue.
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