isinf            2455 maint/gnulib/lib/math.in.h #  undef isinf
isinf            2456 maint/gnulib/lib/math.in.h #  define isinf(x) \
isinf            2469 maint/gnulib/lib/math.in.h #    define isinf rpl_isinf
isinf            2479 maint/gnulib/lib/math.in.h #  define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)