Many Thanks for your feedback.
but when i run the following command on my x86-64 host, i get the error message that the C compiler does't work.
[martin@fc33 cxxtools-3.0]$ ./configure CC="gcc" CFLAGS="-m32" CXXFLAGS="-m32" LDFLAGS="-m32" checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /usr/bin/mkdir -p checking for gawk... gawk checking whether make sets $(MAKE)... yes checking whether make supports nested variables... yes checking whether make supports the include directive... yes (GNU style) checking for gcc... gcc checking whether the C compiler works... no configure: error: in `/home/martin/rpmbuild/BUILD/cxxtools-3.0': configure: error: C compiler cannot create executables See `config.log' for more details
Martin