Date: Tue, 18 May 2004 14:50:31 +0900 From: Till Plewe <till@score.is.tsukuba.ac.jp> To: freebsd-amd64@freebsd.org Subject: Re: profiling on amd64 Message-ID: <20040518055031.GA75775%till@score.is.tsukuba.ac.jp> In-Reply-To: <20040518050421.GA75633%till@score.is.tsukuba.ac.jp> References: <20040518050421.GA75633%till@score.is.tsukuba.ac.jp>
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On Tue, May 18, 2004 at 02:04:21PM +0900, Till Plewe wrote:
>
> The program "int main(){return 0;}" fails to compile if I use the
> option "-pg". The error message I get starts with:
>
> # gcc -pg -o test test.c
> /var/tmp//ccTPXtQI.o: In function `main':
> /var/tmp//ccTPXtQI.o(.text+0x5): undefined reference to `mcount'
> /usr/lib/libc_p.a(gmon.po): In function `monstartup':
> gmon.po(.text+0xa): undefined reference to `mcount
> ...
>
> I am using 5.2-CURRENT cvsuped 3 hours ago.
>
> It looks like a gcc bug since there are several related bug reports
> for other OSs (the once I looked were all for 64bit architectures).
>
> Does anybody know how to fix this?
>
> TIA
>
> - Till
>
It seems that gprof is not build any longer by default.
"/usr/src/usr.bin/gprof" does not contain the files amd64.{c,h}
needed to build gprof. Since the files for the other architectures
seem to be essentially the same I just used copies of these to build
gprof. But since I cannot produce *.gmon files as long as gcc -pg
does not work I cannot check if the resulting binary works or not.
Are there amd64 specific problems with gprof or is gprof being replaced
by some other profiler?
- Till
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