re: bug 3275: GLIBC-2.2.5 for power PC does not build with option --without-fp

[Dan Kegel]

Nick Lekkas filed bug 3275 (see
http://bugs.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=default&pr=3275 
)
which says

> Executed the configure command with the following ARGS:
>
> configure  --prefix=/usr
>             --enable-shared
>             --without-fp
>             --without-gd
>             --without-gd-lib
>             --without-xcoff
>             --without-gmp
>             --enable-kernel=2.2.16
>             --enable-add-ons=linuxthreads
>             --build=i686-pc-linux-gnu
>             --host=i686-pc-linux-gnu
> --with-headers=/home/nlekkas/dl_test/build/stagedir/kernel/include
>
> There appears to be an error in the configuration
> scripts and probably in the sysdeps/powerpc/fclrexcpt.c
> routine. The compilation fails because the
> fenv_libc.h include file is not in the include path.

The workaround was discussed shortly thereafter in the crossgcc
mailing list, I think.  See

http://sources.redhat.com/ml/crossgcc/2002-05/msg00131.html

We use the workaround described there plus a couple other
patches, and although we're not done testing, at least
busybox runs and linux builds.  Here's an excerpt from
our glibc build script:

mv sysdeps/powerpc/fclrexcpt.c sysdeps/powerpc/fpu/
rm sysdeps/powerpc/memset.S

# fix sysdeps/powerpc/Makefile
patch -p0 < ~/xgcc3/glibc-ppc-nofpu.patch1

# add WITH_FP to config.h.in,
# fix sysdeps/unix/sysv/linux/init-first.c to use it
patch -p0 < ~/xgcc3/glibc-ppc-nofpu.patch2

# fix setjmp
patch -p1 < ~/xgcc3/glibc-ppc-nofpu.patch3

The patches and script are online at http://kegel.com/xgcc3/

Hope that helps.
- Dan