g77 and MXUNIT
Thu Dec 30 02:10:00 GMT 2004
So I have this problem, and I was wondering if anyone knew how to solve
this. My Fortran program compiles, but at run time I get an error
open: illegal unit number
apparent state: unit 99 named FOO$099
lately writing direct unformatted external IO
By googling, I found out that in OPEN statements the logical unit numbers
are by default limited from 1 to 99 (in gcc), and this program exceeds
that number (goes to 112 I think). The solution for this seems to involve
recompiling gcc but with gcc/libf2c/libI77/fio.h changed so that
#define MXUNIT 100 -------> #define MXUNIT 1000
or something bigger than 100, anyway. Okay, so I do that, and I recompile
make -j 2 bootstrap
I then recompile my code and try to run it and there is no change, I get
the same error. I'm not sure if my compiler options are correct, perhaps
it is not linking to the right libraries? Btw the code works, but we've
compiled it before with the Intel Fortran compiler. I've also made sure
that any old versions of g77 have been removed so that this new one is the
only one there.
Does anyone have any suggestions?
I'm running a dual-processor opteron, FC3 x86_64.
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