newlib libstdc++-v3 configuration problems

[Matthew Jones <matthewjones at vw1600e dot org dot uk>]

Hello,

Sorry, this is a bit long, but I want to include all the relevant bits first
time round ...

We're trying to build gcc for powerpc-ibm-eabi (actually for a 440GX).
I'm using crosstool-0.27/contrib/newlib/demo-newlib.sh:

  eval `cat powerpc-440.dat` `cat gcc-3.4.3-glibc-2.3.3.dat`
    sh all-newlib.sh --notest --nounpack

and my .dat files are as follows:

powerpc-440.dat:
  TARGET=powerpc-ibm-eabi
  TARGET_CFLAGS="-O"
  GCC_EXTRA_CONFIG=""
  GLIBC_EXTRA_CONFIG="--without-fp"

gcc-3.4.3-glibc-2.3.3.dat:
  PREFIX=/cygdrive/c/crosstool2
  BINUTILS_DIR=/cygdrive/c/gnu/binutils-2.15.94.0.2
  GCC_DIR=/cygdrive/c/gnu/gcc-3.4.3
  NEWLIB_DIR=/cygdrive/c/gnu/newlib-1.13.0
  TARGET=powerpc-ibm-eabi
  TARGET_CFLAGS=-O

It all goes well until the second pass of gcc (final gcc), whereupon it fails
when configuring libstdc++-v3:

  configure: error: No support for this host/target combination.
  make: *** [configure-target-libstdc++-v3] Error 1

Looking at configure.log we have:
  $ /cygdrive/c/gnu/gcc-3.4.3/libstdc++-v3/configure
    --cache-file=./config.cache
    --host=powerpc-ibm-eabi --build=i686-host_pc-cygwin --enable-multilib
    --with-cross-host=i686-host_pc-cygwin --prefix=/cygdrive/c/crosstool2
    --with-headers=/cygdrive/c/crosstool2/powerpc-ibm-eabi/include
    --disable-nls --enable-symvers=gnu --enable-languages=c,c++
    --disable-shared --enable-c99 --enable-long-long
    --with-gcc-version-trigger=/cygdrive/c/gnu/gcc-3.4.3/gcc/version.c
    --program-transform-name=s,^,powerpc-ibm-eabi-,;
    --srcdir=/cygdrive/c/gnu/gcc-3.4.3/libstdc++-v3
    --with-target-subdir=powerpc-ibm-eabi

Why is libstdc++-v3 getting host=powerpc-ibm-eabi rather than
i686-host_pc-cygwin ?

Surely this is wrong, and I'm guessing its the source of my problems ?.
Surely it shouldn't want the _cross_ compiler to build the library ?

Thanks to anyone who can shed light on this!

--
Matthew JONES
http://www.tandbergtv.com/


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