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Reply-To: "Suhaib M. Siddiqi" <ssiddiqi AT ipass DOT net>
From: "Suhaib M. Siddiqi" <ssiddiqi AT ipass DOT net>
To: "Richard Stanton" <stanton AT Haas DOT Berkeley DOT EDU>,
        "Cygwin Mailing List" <cygwin AT sourceware DOT cygnus DOT com>
References: <000a01bea6eb$ceaa8680$8f4b2080 AT berkeley DOT edu>
Subject: Re: Problems with gdb and FORTRAN programs
Date: Tue, 25 May 1999 16:25:11 -0400
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> I'm writing/debugging some FORTRAN code using egcs 1.1.2 and gdb 4.17.1.
> There seem to be some problems viewing variables with gdb in fortran mode.
> For example,
> 
> Breakpoint 1, getdat_ (data=0xf0be20, m=0x30720d0, n=0x30720d4) at
> snpdata.f:40
> (gdb) print n
> $2 = (PTR TO -> ( integer )) 0x30720d4
> (gdb) set lang c
> Warning: the current language does not match this frame.
> (gdb) print n[0]
> $3 = 491
> (gdb) set lang fortran
> (gdb) print n(1)
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x30720d9 in ?? ()

Are you compiling your code with -g option i.e. g77 -g xx.f ?
Do not use any optimization flags when compiling a debug versions.

I think you are missing the debug symbols in your binary.


--Suhaib


> The program being debugged stopped while in a function called from GDB.
> When the function (at 0x30720d4) is done executing, GDB will silently
> stop (instead of continuing to evaluate the expression containing
> the function call).
> (gdb)
> 
> How can I view the contents of the variable n in fortran mode?
> 
> Richard Stanton
> 
> 
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