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Debugging R/Fortran in Windows

2 messages · James Wettenhall, Uwe Ligges

Original
James Wettenhall
# 
Hi,

I'm trying to debug an R interface to a Fortran subroutine from Windows. 
(Yes, I know I should try Unix/Linux as well, but a quick attempt
suggested that the (MinGW g77) Fortran compiler I have installed on my
Windows laptop works better on this Fortran code.)

I'm trying to follow the instructions in the "Writing R Extensions" Manual:

Start R under the debugger after setting a breakpoint for WinMain.
          gdb .../bin/Rgui.exe
          (gdb) break WinMain
          (gdb) run

But when I run gdb on Rgui.exe, I get the message:
"no debugging symbols found"
and then when I try "break WinMain", I get:
"No symbol table is loaded.  use the 'file' command."

I'm using R 2.1.1 on Windows 2000 and gdb 5.2.1 from MSys's MinGW.

I'm calling a Fortran function (several times) from R.  And I seem to have
the basic two-way data communication working - I appear to have
succesfully passed all required data types (integer, real, double
precision) to and from Fortran with sensible results both from within R
and from using WRITE(FILENUM,*) from within Fortran.  But unfortunately
there is still evidence of memory leakage.

Any suggestions would be greatly appreciated.

Regards,
James
Uwe Ligges
#
James Wettenhall wrote:

            

      
      
      
    

        
James, please read the posting guide which asks you to read the R for 
Windows FAQ (which includes an answer on the question "How do I debug 
code that I have compiled and dyn.load-ed?").

It also tells you to send a question like this (given it is not answered 
in the manuals or FAQs etc.) to R-devel rather than R-help.

[hence further responses on this thread seem to be more appropriate for 
R-devel]

Best,
Uwe