Hi Sameer, I see you have the source code located in: /home/sameer/GCC_SOURCE_CODE/gcc_4.0 What is your configure line? If your build location is /home/sameer/GCC_SOURCE_CODE/build it would be something like ../gcc_4.0/configure from the build directory. What is your operating system? (Linux? FreeBSD? OS X? Windows NT? Solaris? Cygwin on NT? Other...?) What is your platform's architecture? (SPARC? PowerPC? i686?) What was the command line you used to initiate the build (e.g., make)? Are you running configure in the same directory as the GCC source code? If so, you should be aware that is not supported. Sincerely, --Eljay