------- Comment #4 from jvdelisle at gcc dot gnu dot org 2007-07-08 07:01 ------- F77 Standard: 13.5.9 (3) "On output, the representation of a positive or zero internal value in the field may be prefixed with a plus, as controlled by the S, SP, and SS edit descriptors (13.5.6) or the processor. The representation of a negative internal value in the field must be prefixed with a minus. However, the processor must not produce a negative signed zero in a formatted output record."
I do not find that last statement about negative signed zero in the F95 or F2003. However, I am still reviewing these more recent standards. A patch is developing. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32611
