Re: [PATCH] Add 64 bit directories to sys_lib_dlsearch_path_spec for Linux ELF
Dan Nicholson wrote: On Thu, Jan 29, 2009 at 11:26 PM, Ralf Corsepius wrote: Dan Nicholson wrote: On Wed, Jan 28, 2009 at 01:50:51PM -0600, Bob Friesenhahn 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. Well, actually, the search paths to system libs is hard coded into gcc. It may vary between architectures, vendors and OSes. I'm talking about the dynamic linker search path, which is determined by glibc. The dynamic linker's search path is not of much importance when linking. Ralf ___ http://lists.gnu.org/mailman/listinfo/libtool
Re: [PATCH] Add 64 bit directories to sys_lib_dlsearch_path_spec for Linux ELF
On Thu, Jan 29, 2009 at 11:26 PM, Ralf Corsepius wrote: > Dan Nicholson wrote: >> >> On Wed, Jan 28, 2009 at 01:50:51PM -0600, Bob Friesenhahn 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. > > Well, actually, the search paths to system libs is hard coded into gcc. > It may vary between architectures, vendors and OSes. I'm talking about the dynamic linker search path, which is determined by glibc. sys_lib_dlsearch_path_spec is how libtool decides whether to encode an RPATH for programs or not. I'm not exactly sure what it does for libraries. -- Dan ___ http://lists.gnu.org/mailman/listinfo/libtool
