Re: [RFA] patch to add 'maint profile-gdb' command

[Jason Molenda <jason-swarelist at molenda dot com>]

On Mon, Sep 10, 2001 at 11:40:38PM +0300, Eli Zaretskii wrote:

> > I'd disagree.  First, these functions are not very portable.  Our
> > very own RH 6.2 box that is sourceware.cygnus.com does not have
> > moncontrol() or monstart(), and -pg doesn't seem to be usable at
> > all.  My RH 7.1 box at home works fine.  MacOS X's FreeBSD works
> > fine.
> 
> We could autoconfiscate this, couldn't we?

We could detect whether moncontrol() exists or not, but there aren't
any macros specifically related to profiling in automake/autoconf.

I suppose we could have a test that would try to include a call to
moncontrol() and see if it causes a link-time error when not paired
with a -pg.  I don't see the point -- without compiling the program
with -pg, running moncontrol() is pointless.  You're going to have
an ifdef in main.c either way - either to check ENABLE_PROFILING
or check HAVE_MONCONTROL - and profiling is not going to work unless
you're specifically compiling gdb with profiling in mind.

> > I just re-read the man page, it doesn't matter where it's disabled.  The
> > gmon.out file is going to be overwritten each time gdb is run no matter
> > what.
> 
> Not if we use monstartup: the file is not touched unless monstartup is
> called.

monstartup provides some information, but not everything that full
profiling gets you.  I think we should stick with linking -pg and
using moncontrol().

Jason