https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67454
--- Comment #10 from James Ballantine <j.ballantine at gmail dot com> --- Dominique, The way this system is managed, is that all packages that are not "official" ones are put in a separate add-on directory which are then added to the front of paths, or before the /usr "standard" directories. So I can see what source was download, built and installed, and while gcc-4.3.2 was built, it was not installed, and the prefix in the Makefile is /usr/local/add-on/gcc-4.3.2, which doesn't exist: ODIN $ ls /usr/local/add-on/gcc-4.3.2 /usr/local/add-on/gcc-4.3.2: No such file or directory As for /usr/local/lib and /usr/lib(/libgcc_s.so.1) here is what is on the system: ODIN $ ls /usr/local/lib X11@ aliases diff3* libv9.a oprsub* pine.conf ODIN $ ls /usr/lib/libgcc* /usr/lib/libgcc*: No such file or directory Andrew, As I stated in my intial report, the LD_LIBRARY_PATH does include the GCC_5.2.0 lib directory.