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Re: Honoring DT_RUNPATH in cross-ld

Ian Lance Taylor <> skribis:

> On Tue, May 28, 2013 at 1:37 PM, Ludovic CourtÃs <> wrote:
>> By default, cross ld does not honor DT_RPATH/DT_RUNPATH entries when
>> searching for a NEEDed shared library.
>> This behavior can be changed by configuring --with-sysroot, because
>> sets USE_LIBPATH=yes as a side effect, which in turn
>> enables RUNPATH search in elf32.em.
>> Sometimes this lookup rule is needed even though the system has nothing
>> like a sysroot (this is the case with GNU Guix, which installs each
>> package in its own directory, Ã la Stow.)
>> What about providing a separate configure option specifically for this?
> DT_RPATH and DT_RUNPATH are absolute paths.  Your suggestion only
> makes sense if the shared libraries are found at the same absolute
> path on both the host system and the target system.  That seems to me
> to be unlikely.

This scenario is what happens when cross-compiling with GNU Guix or Nix,
which use unique directory names for build results.

Perhaps itâs an infrequent situation apart from these two cases.

> In any case you can presumably do what you want by using --with-sysroot=/.

Yes; however, the connection between the option name and the desired
effect is non-trivial.


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