RE: tlug: gcc profiler - I give up!

["Stephen J. Turnbull" <turnbull@example.com>]

>>>>> "David" == David Dibben <dibben@example.com> writes:

    David> On 05-Mar-98 Scott Stone wrote:
    >> I still can't figure out how to make gcc output the profiler
    >> information for gprof to read.  According to the manpage, you
    >> just add the '-pg' flag to gcc, but ... it doesn't produce
    >> gmon.out like gprof says it should.

Grammatically, the "it" in the previous sentence refers to "gcc".
Izzat what you meant?  The man page seems sufficiently clear to me:

       The profile data is taken from the call graph profile file
       (`gmon.out' default) which is created by programs that are
       compiled with the -pg option of cc(1), pc(1), and f77(1).

Ie:

    David> Have you rembered to run your program? The gmon.out file is
    David> produced when the resulting program is run.

You need to carefully distinguish between things that happen at
compile time and those that happen at run-time.  The profiles of

bash$ gs --help

and

bash$ gs escher.ps

are likely to be mildly different.

Computers are non-deterministic, at least those that have users.  :-)

Steve

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