[Buildroot] [PATCH 1/3] c-icap: avoid host library search path

[Arnout Vandecappelle <arnout@mind.be>]

On 04/21/16 08:58, Baruch Siach wrote:
> Hi Arnout,
>
> On Wed, Apr 20, 2016 at 11:35:59PM +0200, Arnout Vandecappelle wrote:
>> On 04/20/16 20:04, Baruch Siach wrote:
[snip]
>>> It turns out that forcing AUTORECONF is enough to fix the problem. I'm not
>>> sure why. I have only noticed that after AUTORECONF, -lz appears explicitly in
>>> the link command line, whereas before libz was linked in implicitly via
>>> libicapapi.so NEEDED tag. Manually running the failed link command with -lz
>>> added, fixes the link as well. I guess that -lz makes the linker search in
>>> sysroot before rpath, but I could not find an explanation to this behaviour in
>>> the ld documentation.
>>
>>   As I wrote yesterday: -rpath is used for searching for NEEDED entries, not
>> for searching for -l argument. And vice versa: -L is used to search for -l
>> arguments, but not for NEEDED entries.
>
> That explains the behaviour I see, thanks. The twist here is that -rpath does
> not search for libraries that were found already as a result of -l. This
> apparently means that -L would indirectly affect the results of -rpath search.
>
> Do you have any reference to gcc/binutils documentation on that?

  I just did 'man ld'.

  Regards,
  Arnout

-- 
Arnout Vandecappelle      arnout dot vandecappelle at essensium dot com
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