Re: [igraph] [R-igraph_0.5.3/Win] Error during compilation - encoding.h is "missing"

[Olivier Delrieu]

Dear all,

FYI, in the latest versions of GCC, one can use the flag
 -march=native
which supersedes
 -march=yourCPU-type -mtune=yourCPU-type

Cheers,

Olivier

Łukasz Ręcławowicz wrote:

2010/4/28, Gábor Csárdi <address@hidden>:

  

As I have told you already, it is much easier to use the windows
package building service, at http://win-builder.r-project.org/
    

Indeed :)

And here are GCC speed-up flags in PKG_CPPFLAGS
-O3 -fomit-frame-pointer -march=yourCPU-type -mtune=yourCPU-type -fipa-pta

yourCPU-type can be found on gcc.gnu.org in : i386 and x86-64 Windows Options
(core2, nocona, pentium2, k6, and so on)

This give me ~40% cpu time less for betweenness.