[Insight-developers] CMAKE_BUILD_TYPE=Release and -frename-registers

[Gaetan Lehmann]

Hi,

For some time, some tests produced by my release build are running for  
ever (I have even stop submitting to the dashboard, because the tests are  
too long).
It seems that everything is fine when building with the default options of  
my distro:

   -O2 -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -fomit-frame-pointer -march=i586  
-mtune=pentiumpro -fasynchronous-unwind-tables


The only important difference seems to be the -O2 instead of the -O3 used  
by default for the Release CMAKE_BUILD_TYPE.
According to gcc man:

   -O3 Optimize yet more.  -O3 turns on all optimizations specified by -O2
       and also turns on the -finline-functions and -frename-registers
       options.

But -frename-registers is a rejected option in ITK, so shouldn't  
CMAKE_BUILD_TYPE=Release set the gcc options to

   -O2 -finline-functions -DNDEBUG

instead of

   -O3 -DNDEBUG

?

Thanks,

Gaetan


-- 
Gaëtan Lehmann
Biologie du Développement et de la Reproduction
INRA de Jouy-en-Josas (France)
tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
http://voxel.jouy.inra.fr