[ODE] Architecture tunning

[Rodrigo Hernandez]

Note that fast and OPCODE require specific C Flags, in fact generic 
flags are not used when building any of the targets.

Bram Stolk wrote:

>Rodrigo Hernandez wrote:
>  
>
>>I just added the option --with-arch= to the configure script, this is an 
>>optional algument to configure and just adds the flag -march= to gcc CPP 
>>Flags, enabling the use of
>>the architecture extensions such as MMX or SSE by the compiler.
>>    
>>
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>
>A better approach would be to use generic vars:
>
>CFLAGS="-O3 -march=pentium4" ./configure --with-prefix=$HOME
>
>This would work, but requires a small adaptation to Makefile.am so that
>AM_CFLAGS = $(CFLAGS) -I$(topsrcdir)/include -I$(top_builddir)/include
>
>This enables more switches than your march-specific switch.
>
>Also, it is the standard method for controlling the compile options using
>an autoconf/automake build system.
>
>  Bram
>
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>>the usage for example for a Pentium 4 would be:
>>
>>configure --with-arch=pentium4
>>
>>for an Athlon XP:
>>
>>configure --with-arch=athlon-xp
>>
>>for a list of all posible options check:
>>
>>http://gcc.gnu.org/onlinedocs/gcc-3.4.1/gcc/i386-and-x86-64-Options.html#i386%20and%20x86-64%20Options
>>
>>Note that that page lists the architecture posibilities for Intel based 
>>processors, but other architectures such as MIPS also have support for 
>>the -march flag.
>>
>>Cheers!
>>_______________________________________________
>>ODE mailing list
>>ODE at q12.org
>>http://q12.org/mailman/listinfo/ode
>>    
>>
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