__warn_unused_result__  836 include/config.h # define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
__warn_unused_result__  404 maint/gnulib/lib/cdefs.h #if __GNUC_PREREQ (3,4) || __glibc_has_attribute (__warn_unused_result__)
__warn_unused_result__  406 maint/gnulib/lib/cdefs.h    __attribute__ ((__warn_unused_result__))