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Re: [PATCH] Add 64 bit directories to sys_lib_dlsearch_path_spec for Lin
Re: [PATCH] Add 64 bit directories to sys_lib_dlsearch_path_spec for Linux ELF
Wed, 28 Jan 2009 12:01:35 -0800
On Wed, Jan 28, 2009 at 11:50 AM, Bob Friesenhahn
> 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.
I think this is the only reasonable way to proceed, but I suppose that
an existence test would be safe, too:
case `/usr/bin/file conftest.o` in
for dir in /lib64 /usr/lib64; do
test -d $dir &&