The following entry points for GLX_AMD_gpu_association are missing from the descriptor file:
void glXBlitContextFramebufferAMD (GLXContext dstCtx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter)
GLXContext glXCreateAssociatedContextAMD (unsigned int id, GLXContext share_list)
GLXContext glXCreateAssociatedContextAttribsAMD (unsigned int id, GLXContext share_context, const int attribList)
Bool glXDeleteAssociatedContextAMD (GLXContext ctx)
unsigned int glXGetContextGPUIDAMD (GLXContext ctx)
GLXContext glXGetCurrentAssociatedContextAMD (void)
unsigned int glXGetGPUIDsAMD (unsigned int maxCount, unsigned int ids)
int glXGetGPUInfoAMD (unsigned int id, int property, GLenum dataType, unsigned int size, void* data)
Bool glXMakeAssociatedContextCurrentAMD (GLXContext ctx)
Indeed, there is something wrong here.
The specification on opengl.org contains a lot of Windows-types such as BOOL, INT, HGLRC. I've put into GLEW my "best guess" of what the parameter types ought to be, were you able to find any more definitive information?
http://www.opengl.org/registry/specs/AMD/glx_gpu_association.txt
Fixed in GLEW 1.10.0
Closing.
Thanks for the report.