[petsc-users] How to use PETSc in debug?

[Song Gao]

Thanks! It solves this problem

2015-04-16 14:55 GMT-04:00 Matthew Knepley <knepley at gmail.com>:

> On Thu, Apr 16, 2015 at 1:35 PM, Song Gao <song.gao2 at mail.mcgill.ca>
> wrote:
>
>> Dear PETSc users,
>>
>> I'm debugging my code but cannot see those line informations in gdb
>>
>> I compiled PETSc with
>> --with-cc=gcc --with-cxx=g++ --with-fc=gfortran --download-fblaslapack
>> --download-mpich --with-debugging=yes
>>
>> I modified my code from KSP ex1f.F and use that makefile.
>>
>> Then compiled code
>> make PETSC_DIR=/home/cfd/sgao/bin/petsc-3.5.3
>> PETSC_ARCH=FEM_project_DEBUG ex1f
>> The log is attached, I see the -g flag there. But when I run code with
>> gdb, I didn't see line information there.
>>
>>
>> $gdb ./ex1f
>> (gdb) b main
>> Breakpoint 1 at 0x4080e0: file ../../../gcc-4.3.0/libgfortran/fmain.c,
>> line 11.
>>
>
> main() is not the Fortran entry point. You might be better off working in
> C.
>
> However, if you really want Fortran, try breaking at a line number in your
> file. Also
> make sure you did not delete the *.o file
>
>    Matt
>
>
>> (gdb) r
>> Starting program: /home/cfd/sgao/FEM_in_CFD/code/ex1f
>> [Thread debugging using libthread_db enabled]
>>
>> Breakpoint 1, main (argc=1, argv=0x7fffffffcc58) at
>> ../../../gcc-4.3.0/libgfortran/fmain.c:11
>> 11 ../../../gcc-4.3.0/libgfortran/fmain.c: No such file or directory.
>> in ../../../gcc-4.3.0/libgfortran/fmain.c
>> (gdb) l
>> 6 in ../../../gcc-4.3.0/libgfortran/fmain.c
>> (gdb)
>>
>>
>> What did I miss here? Thank you in advance.
>>
>> Song
>>
>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
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