Re: profiling support for i386-gnu specs file

[Daniel Jacobowitz <dan@debian.org>]

On Fri, Dec 28, 2001 at 07:53:31PM +0100, Marcus Brinkmann wrote:
> >Description:
> I fixed the Hurd specs file to support profiling (which was broken
> for statically linked programs).  The specs file I successfully used
> is attached, an analysis of what it does (or should do) is in the
> table below.  The only relevant part of the specs file (the only
> parts which I changed) are "cc1" and "startfile".
> 
> The Hurd has the i386-gnu architecture.
> 
> To profile the program only:
> $ gcc -o main main.c -pg
> $ ./main
> $ gprof main gmon.out
> 
> To profile the program and the C library:
> $ gcc -o main main.c -profile
> $ ./main
> $ gprof main gmon.out
> 
> The specs file implement the following option combinations:
> Notes: -shared overrides (and prevents) profiling options at the linking
> stage
>        -profile forces to link the profiling C library statically
>        -pg/-p does link to the normal C library (dynamically or statically)
> 
> The cc1 option -p is added for all of -p/-pg/-profile (for the first
> two automatically, for the third there is a rule in the specs file).

This is inconsistent with the behavior of (the undocumented) -profile
on Linux, IIRC; there it links in -lc_p but does not imply -pg.  Of
course, perhaps that should just be fixed too :)  This option really
should be added to the documentation.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer