Hi, I updated my gnu toolchain build script, now it work with MinGW too. So it can be used to build gnu as, ld, gcc and gdb for windows (I built it with both cygwin and mingw), for linux (I built it with redhat and ubuntu) and for macosx (I built it with 10.6.5). Below there are the links for built scripts, for Windows toolchain built with MinGW and for MinGW used to built the toolchain for windows. The toolchain has the latest version of gnu tools (binutils 2.21, newlib 1.19, gcc 4.5.2 and gdb 7.2). http://dl.dropbox.com/u/159574/build-scripts-20110101.tar.bz2 http://dl.dropbox.com/u/159574/Toolchain_setup.exe http://dl.dropbox.com/u/159574/MinGW_setup.exe See you Santo