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libstdc++V3 config error building GCC 3.0 on alphaev6-dec-osf5.0

A standard "make bootstrap" as per gcc instructions builds compilers 
fine and then
stops at "make configure-target-libstdc++-v3" with the following output
and errors:

loading cache ../config.cache within ltconfig
checking host system type... alphaev6-dec-osf5.0
checking build system type... alphaev6-dec-osf5.0 error: problem compiling test program
checking for objdir... .libs
checking for /usr/local/src/gcc-3.0_build/gcc/xgcc option to produce
checking if /usr/local/src/gcc-3.0_build/gcc/xgcc PIC flag  -DPIC
works... no
checking if /usr/local/src/gcc-3.0_build/gcc/xgcc static flag -static
works... no
finding the maximum length of command line arguments... (cached) 24577
checking if /usr/local/src/gcc-3.0_build/gcc/xgcc supports -c -o
file.o... (cached) yes
checking if /usr/local/src/gcc-3.0_build/gcc/xgcc supports -fno-rtti
-fno-exceptions ... no
checking whether the linker (ld) supports shared libraries... 
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking dynamic linker characteristics... osf5.0
checking command to parse /usr/local/alphaev6-dec-osf5.0/bin/nm
output... failed
checking if libtool supports shared libraries... no
checking whether to build shared libraries... no
checking whether to build static libraries... yes
checking for dlfcn.h... (cached) yes
checking whether a program can dlopen itself... (cached) yes
checking whether a statically linked program can dlopen itself...
(cached) no
appending configuration tag "CXX" to libtool
checking for GNU make... make
checking for g++ that will successfully compile libstdc++-v3...
configure: error: please upgrade to GCC 3.0 or above
make: *** [configure-target-libstdc++-v3] Error 1
It seems the error is at the 3rd line:
" error: problem compiling test program" 
although the built compilers seem to work fine otherwise.
Can anyone please suggest where to from here, I've tried various
options and suggestions without success, as I don't really understand
happening. Is there something broken about the DEC Alpha with Tru64

Paul Jackway
CSSIP, Australia.

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