Re: Bootstraping i686-linux gcc on x86_64-linux fails during libgcc stage1 on trunk

[Laurent GUERBY <laurent at guerby dot net>]

On Wed, 2010-03-03 at 00:33 +0000, Joseph S. Myers wrote:
> On Wed, 3 Mar 2010, Laurent GUERBY wrote:
> 
> > $ ../trunk/configure --prefix=/n/100/guerby/install-trunk
> > --enable-languages=c --enable-__cxa_atexit --disable-nls
> > --enable-threads=posix --with-mpfr=/opt/cfarm/mpfr-2.4.2-32
> > --with-gmp=/opt/cfarm/gmp-4.2.4-32 --with-mpc=/opt/cfarm/mpc-0.8-32
> > --build=i686-linux-gnu --host=i686-linux-gnu --target=i686-linux-gnu
> > --disable-multilib
> 
> The logic to use lib32 on Debian/Ubuntu is only in t-linux64, so you need 
> to build --enable-targets=all for this to work.  (I don't know whether 
> --enable-targets=all --disable-multilib works; it doesn't really make 
> logical sense, but might in fact cause the MULTILIB_OSDIRNAMES 
> configuration to take effect with none of the rest of the multilib 
> configuration.)

Thanks! --enable-targets=all --disable-multilib did the trick on debian:

http://gcc.gnu.org/ml/gcc-testresults/2010-03/msg00241.html

And the installed compiler works as expected, now trying
with more languages. I checked the generated multilib.h
and it has all the definitions plus DISABLE_MULTILIB
defined, see below.

I don't know if configure could do better here.

Sincerely,

Laurent

guerby@debian:~/build1$ cat ./gcc/multilib.h
static const char *const multilib_raw[] = {
". !m64 !m32;",
".:../lib64 m64 !m32;",
".:../lib32 !m64 m32;",
NULL
};

static const char *const multilib_matches_raw[] = {
"m64 m64;",
"m32 m32;",
NULL
};

static const char *multilib_extra = "";

static const char *const multilib_exclusions_raw[] = {
NULL
};

static const char *multilib_options = "m64/m32";

#define DISABLE_MULTILIB  1