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Subject: Bootstrap failure configuring in-tree gmp in mainline
From: Bradley Lucier <lucier@math.purdue.edu>
To: gcc@gcc.gnu.org
Cc: Bradley Lucier <lucier@math.purdue.edu>
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Date: Wed, 15 Jul 2009 20:38:00 -0000
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After configuring

Target: x86_64-unknown-linux-gnu
gcc version 4.5.0 20090715 (experimental) [trunk revision 149654] (GCC) 

with

../../mainline/configure --enable-checking=release --prefix=/pkgs/gcc-mainline-mem-stats --enable-languages=c --enable-gather-detailed-mem-stats

I get the bootstrap error:

Configuring stage 2 in ./gmp
< stuff omitted>
checking how to run the C++ preprocessor... /lib/cpp
configure: error: C++ preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.
make[2]: *** [configure-stage2-gmp] Error 1
make[2]: Leaving directory `/home/lucier/programs/gcc/objdirs/mainline'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/home/lucier/programs/gcc/objdirs/mainline'
make: *** [bootstrap] Error 2

This is using an in-tree gmp 4.3.0, gmp/config.log reports:

configure:11030: checking how to run the C++ preprocessor
configure:11061:  /home/lucier/programs/gcc/objdirs/mainline/./prev-gcc/g++ -B/home/lucier/programs/gcc/objdirs/mainline/./prev-gcc/ -B/pkgs/gcc-mainline-mem-stats/x86_64-unknown-linux-gnu/bin/ -nostdinc++ -I/home/lucier/programs/gcc/objdirs/mainline/prev-x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu -I/home/lucier/programs/gcc/objdirs/mainline/prev-x86_64-unknown-linux-gnu/libstdc++-v3/include -I/home/lucier/programs/gcc/objdirs/mainline/../../mainline/libstdc++-v3/libsupc++ -L/home/lucier/programs/gcc/objdirs/mainline/prev-x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs -E -DNO_ASM conftest.cc
/home/lucier/programs/gcc/mainline/gmp/configure: line 11062: /home/lucier/programs/gcc/objdirs/mainline/./prev-gcc/g++: No such file or directory
<stuff omitted>
configure:11061: /lib/cpp -DNO_ASM conftest.cc
cpp: error trying to exec 'cc1plus': execvp: No such file or directory

Am i missing something? 

Brad