Could you please help with compile under profiler support like gprof

[vit1251]

I create some application and want understand profile information over gprof.
Tight now I add

c_args = [ '-pg' ]
link_args = ['-pg']

As result I receive gmon.out but gprof does not provide any result. Do u know where problem may bey exists?

[vit1251]

It look like require

c_args = ['-pg', '-no-pie']
link_args = ['-pg', '-no-pie']

But may be meson contain keyword argument to compile with profiling instead do it by hand?

[jpakkane]

Hmmm, apparently we don't have an option for that. It would be a useful addition, so patches are welcome as usual? In the mean time you might consider using some other profiler, such as the one integrated in Valgrind.

[vit1251]

@jpakkane Valgrind is well working but some very real-time application may degradate performance. I does know about gpref but belive that it less affect my own application performance.

[solsticedhiver]

Yes. that would be a welcome feature instead of crawling the web towards that issue

[dwsteele]

+1 for this feature.

[andy5995]

@jpakkane @eli-schwartz you can assign this to me.

Should profiling be added as an additional value for the 'buildtype' core option?

[eli-schwartz]

Is it a build type? The current ones map to various debug/optimization settings. This seems more in the same genre as sanitizers, fanalyzer, and so on, so I'd expect it to be a b_profiler option or something.

[dwsteele]

I prefer b_profile. Working similar to b_coverage.

[andy5995]

Is it a build type? The current ones map to various debug/optimization settings. This seems more in the same genre as sanitizers, fanalyzer, and so on, so I'd expect it to be a b_profiler option or something.

In the gcc docs, it's listed under the Instrumentation heading.

I'll start by adding it as a 'b_...' option.

One sticking point.. Besides -pg, there's also a -p option (gcc compiler).

Generate extra code to write profile information suitable for the analysis program prof (for -p) or gprof (for -pg).

So do we need a b_profile option and also a b_gprofile option?

[eli-schwartz]

One option, but it accepts 3 choices (similar to how optimization accepts several choices depending on what kind of optimization you want).

[andy5995]

Do we actually need to add an option for 'prof'? I can't even find that program in Arch Linux or Debian.