On Wed, Jan 28, 2009 at 11:50 AM, Bob Friesenhahn <bfrie...@simple.dallas.tx.us> wrote: > On Wed, 28 Jan 2009, Dan Nicholson wrote: > >> When the ABI is 64-bit on Linux ELF, add /lib64 and /usr/lib64 to the >> system library path so that an RPATH is not added when using libraries >> from these directories. > > Are these libraries consistently available for 64-bit Linux? If not, should > they be explicitly tested for before depending on them? > > I got the impression that Linux systems which are completely 64-bit (i.e. > don't support executing 32-bit binaries) don't use /lib64 and /usr/lib64.
If they follow the LSB, then they should be using lib64. However, you can configure the linker any number of ways. I tried to get a patch to glibc so this path could be determined, but it was rejected. http://sourceware.org/ml/libc-alpha/2008-12/msg00052.html I think this is the only reasonable way to proceed, but I suppose that an existence test would be safe, too: sys_lib_dlsearch_path_spec="/lib /usr/lib" case `/usr/bin/file conftest.o` in *64-bit*) for dir in /lib64 /usr/lib64; do test -d $dir && sys_lib_dlsearch_path_spec="$sys_lib_dlsearch_path_spec $dir" done ;; esac -- Dan _______________________________________________ http://lists.gnu.org/mailman/listinfo/libtool
