On 30 November 2010 17:04, Andrew Haley wrote: > On 11/30/2010 04:24 PM, Vincent Lefevre wrote: >> Hasn't this been standardized? > > Yes: it's part of the psABI. Ah, thanks for the correction, Andrew. Vincent, rather than using LIBRARY_PATH (which doesn't do what you want when gcc-4.3.1 decides to look in $LIBRARY_PATH/../lib64) you could use -L to ensure it looks in the directories you want. Or you could add lib64 symlinks pointing to $HOME/gmp/athlon64/lib and $HOME/x86_64/lib, so that you get consistent behaviour from Debian's gcc and FSF gcc.