Hi Alex, > > I would like to experiment with gcc 4.5 while keeping my current gcc > 4.4.3 installed. I am happy for all the current binaries and libraries > (of 4.4.3) to be found by default. I only want to try compiling some > toy programs with gcc 4.5. I guess this will involve passing some > custom -prefix to ./configure when I compile gcc 4.5 and then perhaps > something like "/path/to/4.5/gcc --sysroot=/path/to/gcc myprog.c". Can > anyone help me with specifics here? > See http://gcc.gnu.org/faq.html#multiple The easiest might be to use --prefix=/path/to/4.5 and --program-suffix=-4.5 Then it is sufficient to either include the installation path into your PATH and to call the compiler as "gcc-4.5", or to call it as "/path/to/4.5/bin/gcc-4.5". It will find automatically the necesarry include paths and libraries - "--sysroot" is NOT necessary. HTH, Axel
