Re: gprof Octave 4.2.1 with gcc 6.3

[John W. Eaton]

On 01/04/2018 05:30 PM, Andreas Weber wrote:
> Dear all,
>
> I was able to build Octave 4.2.1 tarball with gcc 6.3.0 and gprof on
> debian stretch with
>
> ../octave-4.2.1/configure CFLAGS=-pg -no-pie CXXFLAGS=-pg -no-pie
> --disable-java --disable-docs --without-qt --without-fftw3
> --without-fltk --enable-static --disable-dl --disable-shared
>
> the --no-pie is important for gcc > 4.9:
> https://lists.gnu.org/archive/html/bug-binutils/2017-02/msg00262.html
>
> I run Riks benchmark
> a = 1; b = 1; tic; for i=1:1000; for j=1:1000; a = a + b + 123.0; end;
> end; t1=toc(); t1
>
> and uploaded the result here: https://josoansi.de/files/out
>
> I hope that I have time to build my docker images from 3.6.4 until 4.3.0
> with gprof the next days

Thanks for the compiler flags.

Since -O2 is set in CFLAGS and CXXFLAGS and not some other configuration 
variables that are added to the compiler command, you've disabled 
compiler optimization.  Did you intend to do that?

jwe