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Re: [PATCH] Add 64 bit directories to sys_lib_dlsearch_path_spec for Lin

From: Dan Nicholson
Subject: Re: [PATCH] Add 64 bit directories to sys_lib_dlsearch_path_spec for Linux ELF
Date: Fri, 30 Jan 2009 06:24:10 -0800

On Thu, Jan 29, 2009 at 11:26 PM, Ralf Corsepius <address@hidden> 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.


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