GCC 4.0.1 was successfully built on Fedora Core 3 using 3.4.4 as the starting compiler.
[EMAIL PROTECTED] opt2]$ gcc -v Using built-in specs. Target: i686-pc-linux-gnu Configured with: ../configure --prefix=/opt2/gcc401 --enable-threads=posix --with-system-zlib -enable-shared --enable-__cxa_atexit --enable-languages=c,c++,f95,objc Thread model: posix gcc version 4.0.1 20050608 (prerelease) Please note that I did not build java nor ada. GCC was built with 'make bootstrap'. The machine in question is an older Athlon XP 2500+ Barton with 512MB and 1.5GB swap. Swap stays around 192MB on my machine, and did not grow during compilation. [EMAIL PROTECTED] opt2]$ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 10 model name : AMD Athlon(tm) XP 2500+ ... [EMAIL PROTECTED] opt2]$ cat /proc/version Linux version 2.6.11.11 ([EMAIL PROTECTED]) (gcc version 3.4.3 20050227 (Red Hat 3.4.3-22.fc3)) #1 Sun May 29 13:35:04 EDT 2005 Build time was approximately 30 minutes. Later this evening I will be rebuild and boot my kernel for testing and the latest announced ACE/TAO beta, 5.4.6. This will exercise the C and C++ portions of GCC.