Re: mips64-linux multilib vs -B mips64-linux/lib32/

[Andreas Jaeger <aj at suse dot de>]

Guido Guenther <agx@sigxcpu.org> writes:

> Hi,
> when trying to build a cross mips64-linux-gcc like:
>   ../gcc-cvs/configure --target=mips64-linux --enable-languages='c,c++'
> I'm running into the problem that the link for libgcc_s_32.so and
> libgcc_s_64.so (as well as libstdc++ among others) always get passed a
>  -B/var/scratch/toolchain//cross-mips64-linux/mips64-linux/lib/

-B is the prefix for the executables etc.  It should be the same
independend of the multilib.

I have the same on x86_64:
checking for gcc... (cached) /usr/src/aj/build/gcc/misc/gcc/xgcc -B/usr/src/aj/build/gcc/misc/gcc/ -B/opt/gcc/hammer-3_3-branch/x86_64-suse-linux-gnu/bin/ -B/opt/gcc/hammer-3_3-branch/x86_64-suse-linux-gnu/lib/ -isystem /opt/gcc/hammer-3_3-branch/x86_64-suse-linux-gnu/include  -m32
checking whether we are using GNU C... (cached) yes

The magic happens AFAIK with the --print-multi options.  For example I
have on x86_64:
$ gcc --print-multi-lib
.;
32;@m32
$ gcc --print-multi-directory
.
$ gcc --print-multi-os-directory
../lib64
$ gcc --print-multi-os-directory -m32
../lib
$ gcc --print-multi-directory -m32
32

So, ../lib is used to the the 32-bit library and ../lib64 for the
64-bit one.  -m32 does the right thing here.

> (always picking up the o32 glibc). This is wrong for n32 and n64 which
> should have lib32/ and lib64/ respectively. I can hack around this in
> gcc/mklibgcc.in and other places but maybe somebody can point me at the
> right place to fix this.

Comparing x86_64-linux-gnu with mips64-linux-gnu, I only noticed that
x86_64-linux-gnu has in t-linux64:
LIBGCC = stmp-multilib
INSTALL_LIBGCC = install-multilib

This is missing in the mips version - but I doubt that this solves
your problem.

Andreas
-- 
 Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj
  SuSE Linux AG, Deutschherrnstr. 15-19, 90429 Nürnberg, Germany
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