Han wrote: > On Fri, Jan 15, 2010 at 6:21 AM, Tim Prince <n8tm@xxxxxxx> wrote: > >> Han wrote: >> >> >>> From what I learned (e.g. the book "An introduction to GCC" by Brian >>> Gough), /usr/local/lib is searched _before_ /usr/lib by gcc linker for >>> libraries. However, using ldd I can see my program always linked to >>> the libraries from /usr/lib, even when the same library exists under >>> both /usr/lib and /usr/local/lib. >>> >>> Is "/usr/local/lib" still searched before "/usr/lib" by GCC by >>> default? If not, is there a way to force GCC to search /usr/local/lib >>> first? >>> >>> >> gcc doesn't control this. I hope you are misquoting the textbook. >> Presumably, you are running under a shell which supports setting the search >> order in PATH and LD_LIBRARY_PATH .... environments. In certain common linux >> systems, the default order changes according to the path you use to login >> (ssh, telnet, console,....). >> >> > > it seems my shell does not have LD_LIBRARY_PATH... > > $ echo $LD_LIBRARY_PATH > $ > $ env | grep LD_LIBRARY_PATH > $ > > You could set the LD_LIBRARY_PATH environment variable in GNU bash via # export LD_LIBRARY_PATH="comma-separated-list-of-directories-to-search-in"
