Bugs for Sorcery are reported here

[bugzilla-daemon AT bugs.sourcemage.org]

http://bugs.sourcemage.org/show_bug.cgi?id=15621

           Summary: smgl-archspecs should provide native and generic for
                    IA-32/x86-64 users
           Product: Sorcery
           Version: Untargetted future release
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Sorcery
        AssignedTo: sm-sorcery-bugs AT lists.ibiblio.org
        ReportedBy: hgr AT vabo.cz


Setting archspecs is usually quite difficult for new users. What processor I
have, what model, what cpu family...? Is my new processor supported by this 
GCC
version? What archspecs were changed? IA-32/x86-64 users can now use native 
and
generic. 

GCC from 4.2 provides targets native and generic.
http://gcc.gnu.org/gcc-4.2/changes.html :

-mtune=native and -march=native will produce code optimized for the host
architecture as detected using the cpuid instruction.

-mtune=generic can now be used to generate code running well on common x86
chips. This includes AMD Athlon, AMD Opteron, Intel Pentium-M, Intel Pentium 4
and Intel Core 2.


For creating portable systems (install iso, live cd) it is appropriate to use
generic. To optimize on particular system just use native and GCC detect
processor type and optimized for it.


Gentoo also suggests to use only -march=native and ignore all archspecs
settings. Of course this is not for cross-compiling etc..
http://en.gentoo-wiki.com/wiki/Safe_Cflags/Intel


We should update sorcery / smgl-archspecs to provide generic, native and 
custom
settings (custom = today's archspecs).


I added "native" file with

CPUNAME="Native"
CFLAGS="-mtune=native -march=native"
HOST="i686-pc-linux-gnu"
FAST="-O3"
SMALL="-Os"

to my /usr/share/archspecs, chose it by sorcery and seems none problem here
during casting.

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