_GL_HAS_BUILTIN_ADD_OVERFLOW 233 maint/gnulib/lib/intprops.h # define _GL_HAS_BUILTIN_ADD_OVERFLOW __has_builtin (__builtin_add_overflow) _GL_HAS_BUILTIN_ADD_OVERFLOW 237 maint/gnulib/lib/intprops.h # define _GL_HAS_BUILTIN_ADD_OVERFLOW 1 _GL_HAS_BUILTIN_ADD_OVERFLOW 239 maint/gnulib/lib/intprops.h # define _GL_HAS_BUILTIN_ADD_OVERFLOW 0