_GL_ATTRIBUTE_NODISCARD 840 include/config.h # define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]] _GL_ATTRIBUTE_NODISCARD 842 include/config.h # define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__)) _GL_ATTRIBUTE_NODISCARD 844 include/config.h # define _GL_ATTRIBUTE_NODISCARD