Re: Compiling GCC

[Kai Ruottu <karuottu at mbnet dot fi>]

Paulo J. Matos wrote:
> Probably this is due to the fact that in Gentoo intel core duo follow
> the amd64 branch, since they are 64 bit processors...
>
> checking whether the C compiler works... configure: error: cannot run
> C compiled programs.
> /home/pmatos/gcc411-build/./gcc/xgcc
> -B/home/pmatos/gcc411-build/./gcc/ -B
> /home/pmatos/gcc-bin/x86_64-unknown-linux-gnu/bin/
> -B/home/pmatos/gcc-bin/x86_64-unknown-linux-gnu/lib/ -isystem
> /home/pmatos/gcc-bin/x86_64-unknown-linux-gnu/include -isystem /hom
> e/pmatos/gcc-bin/x86_64-unknown-linux-gnu/sys-include  -m32 -o
> conftest -O2 -g -O2    conftest.c  >&5
> /usr/bin/ld: skipping incompatible /usr/lib/../lib/libc.so when
> searching for -lc
> /usr/bin/ld: skipping incompatible /usr/lib/../lib/libc.a when 
> searching for -lc
> /usr/bin/ld: warning: i386:x86-64 architecture of input file
> `/usr/lib/../lib/crt1.o' is incompatible with i386 output
With '-m32' the 32-bit libraries in '/usr/lib' will be used !  The 
'/usr/lib64' has
the 64-bit x86_64 libraries!

Maybe your Gentoo is a "custom" Linux with unstandard conventions?

The Ubuntu Linux/x86_64 is this kind of "custom" Linux where the 64-bit
libs are in '*lib' and the 32-bit libs in '*lib32'.  The Fedora, SuSE 
etc. then
use the convention which the GCC sources assume a Linux/x86_64, or any
other 64-bit Linux using ('mips64-linux-gnu', 'ppc64-linux-gnu',
'sparc64-linux-gnu',.....)