isnan            2576 maint/gnulib/lib/math.in.h #  undef isnan
isnan            2577 maint/gnulib/lib/math.in.h #  define isnan(x) \
isnan            2582 maint/gnulib/lib/math.in.h #  undef isnan
isnan            2583 maint/gnulib/lib/math.in.h #  define isnan(x) \
isnan            2596 maint/gnulib/lib/math.in.h #    define isnan rpl_isnan
isnan            2604 maint/gnulib/lib/math.in.h #   define isnan isnan
isnan            2610 maint/gnulib/lib/math.in.h #  undef isnan
isnan            2611 maint/gnulib/lib/math.in.h #  define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)