Re: How to get gdb to trace through gmp?

[Linus Nordberg]

Ronald Bruck <address@hidden> wrote
Sat, 21 Apr 2001 10:27:38 -0700:

   First, is gmp compiled using the -g option?  

Yes.  But it's also compiled using the -O2 option, making debugging a
bit weird since some source code lines don't have any corresponding
machine code due to optimizations.


   The makefiles are so complicated, I can't find a CFLAGS option
   anywhere with the -g.  

Try
$ ./configure 
$ egrep CFLAGS mpz/Makefile


   Can it be added from the command line?

Yes, either at configure time or at make time.  The configuration is a
bit primitive concerning setting CFLAGS and CC by hand, but one way of
getting it right is to configure once without any special arrangements
and use CC and CFLAGS from a newly constructed Makefile as a starting
point.  Then do 
$ ./configure CC="compiler" CFLAGS="-flags"

At make time, just do
$ make CFLAGS="-flags"

   
   Second, and in general:  are there any performance penalties for using
   -g?  Size penalties, surely; I'm not concerned about that.

No.

   
   Third, how do I get gdb to recognize and include gmp sourcefiles in
   its disgorgements?
   
You shouldn't need to do anything special.  Just keep the source file
where you compiled them.

--linus