686 to 486 'cross compile'

Gerard Beekmans gerard at linuxfromscratch.org
Wed Sep 13 10:12:16 PDT 2000


> I'm going to start building LFS 2.4 for an old 486 box. However, due to HDD
> constraints, etc., I can't install a 'build' environment on that box. I was
> therefore planning to chuck the HDD into my LFS 2.3.7 PII box and build
> from there and then pop the HDD back into the 486.
>
> What issues may there be from 'cross compiling' from a -march=i686
> -mcpu=i686 to a 486. Do I change the CFLAGS, CXXFLAGS on the PII? When I
> did this with the BASH build it still claimed to be 'Building for i686...',
> although it seemed to compile with 486 flags.

If CFLAGS is set, ignore what bash tells you. Bash just tells you what it 
found for your host system, not what you actually compile for. You can always 
pass "--host=i486-linux-pc-gnu" or something similar to every configure 
script. 

-- 
Gerard Beekmans
www.linuxfromscratch.org

-*- If Linux doesn't have the solution, you have the wrong problem -*-





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