Re: gprof total run time incorrect

[Paolo Carlini]

Hi,

and thank you very much for your reply.

>Was this different before you switched to the current versions of gcc
>and glibc?

Honestly, the last time I profiled *C* code was 2-3 years ago and I'm
quite new to C++ programming.

>Please note that gprof can't measure and account the time spent in
>shared-library routines called by your program. This is usually the
>root of the majority of apparently "missing" time in the gprof
>measurements. To get over this, the only method I know is forcing a
>static linkage of your program, with the profiling version of libc
>(libc_p.a) and friends. "gcc -profile -static" or something similar
>usually does that.

Thank you very much.
I will try what you are suggesting (the -static build, I mean) and then
'll report to you privately.

Anyway, I'm wondering what's different between C and C++: C programs are
correctly profiled even without forcing static linkage... Looks like in
my particular case the problem is with libsdc++, not libc.

Cheers,
Paolo.