Someone

lfs@aaricia:/mnt/lfs/sources/gcc-3.4.3$ ../gcc-3.4.3/configure --prefix=/tools     --libexecdir=/tools/lib --with-local-prefix=/tools     --disable-nls --enable-shared --enable-languages=c
loading cache ./config.cache
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking build system type... i686-pc-linux-gnu
checking for a BSD compatible install... /usr/bin/install -c
*** This configuration is not supported in the following subdirectories:
     target-libstdc++-v3 target-libf2c target-libffi target-boehm-gc target-zlib target-libjava zlib fastjar target-libobjc
    (Any other directories should still work fine.)
/tools/bin/ld:/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/libc.so: file format not recognized; treating as linker script
/tools/bin/ld:/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/libc.so:5: syntax error
collect2: ld returned 1 exit status
*** The command 'gcc -o conftest -g -O2   conftest.c' failed.
*** You must set the environment variable CC to a working compiler.