Hi! I am trying to build GCC 4.4.5 from source on an x86_64 machine running under Ubuntu. The build is stalling with the following error: /usr/bin/ld: skipping incompatible /usr/lib/../lib/libc.so when searching for -lc /usr/bin/ld: skipping incompatible /usr/lib/../lib/libc.a when searching for -lc /usr/bin/ld: skipping incompatible //usr/lib/libc.so when searching for -lc /usr/bin/ld: skipping incompatible //usr/lib/libc.a when searching for -lc /usr/bin/ld: cannot find -lc collect2: ld returned 1 exit status make[5]: *** [libgcc_s.so] Error 1 And I don't know quite what to do. I tried running sudo apt-get install libc6 and apt-get said that the latest version of libc was already installed. Any suggestions? Thanks! uname -a Linux BL1 2.6.35-30-server #56-Ubuntu SMP Mon Jul 11 21:37:42 UTC 2011 x86_64 GNU/Linux Amittai Aviram PhD Student in Computer Science Yale University 646 483 2639 amittai.aviram@xxxxxxxx http://www.amittai.com