// check if the given extension name is present in the space-separated list
// of extensions supported by the current implementation such as returned
// by glXQueryExtensionsString() or glGetString(GL_EXTENSIONS)
static bool IsExtensionInList(const char *list, const char *extension);
// check if the given extension name is present in the space-separated list
// of extensions supported by the current implementation such as returned
// by glXQueryExtensionsString() or glGetString(GL_EXTENSIONS)
static bool IsExtensionInList(const char *list, const char *extension);