[1504] in Athena Bugs
F77 bugs
daemon@ATHENA.MIT.EDU (adtaiwo@ATHENA.MIT.EDU)
Fri Dec 9 11:21:25 1988
From: <adtaiwo@ATHENA.MIT.EDU>
To: bugs@ATHENA.MIT.EDU
Date: Fri, 09 Dec 88 11:20:27 EST
Hi,
I finally tracked down the bug. The compiler does not send a substring
to te rename function, rather it sends the adress of the char *variable. This
is a string with a lot of blank spaces, e.g. "prm " of course
the operating system returns ENOENT. The compiler somehow botches this return
value and this is why the test loop is always ignored.
Summary:
F77 does not handle substrings properly.
F77 botches return values of functions,
even a line of the type "call exit(1)" in your fortran program does
not return 1 to the calling program (operating system,at least not to dbx.)
I have a temporary fix, a little C stub that scans the *from and *to
parameters before passing them to rename, from the C function library rather
than the one from the fortran function library.
Thank you. -adtaiwo
