[cmake-developers] [CMake][PATCH] AIX RPATH handling

[CHEVRIER, Marc]

Ok. I see the problem. Thanks for your investigation.
I will work on that and submit a patch to solve this problem.

Marc





On 10/12/15 14:42, "Brad King" <brad.king at kitware.com> wrote:

>On 12/10/2015 04:03 AM, CHEVRIER, Marc wrote:
>> I identify the root of the problem: if I specify version 3.4 in
>> cmake_minimum_required, generated link command (stored in file link.txt)
>> for an executable does not contains value specified in variable
>> CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS. Specifying 3.3 fix the problem.
>> So this is a regression introduced in 3.4.
>
>It is not technically a backward incompatibility because project code
>that worked in 3.3 will still work the same way in 3.4.  Only after
>modifying the code to require 3.4 does the behavior change, but the
>new behavior is a regression.  This is policy CMP0065:
>
> https://cmake.org/cmake/help/v3.4/policy/CMP0065.html
>
>introduced here:
>
> CMP0065: Restrict the use of CMAKE_SHARED_LIBRARY_LINK_<LANG>_FLAGS
> https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=9784af1b
>
>The bug is that CMAKE_SHARED_LIBRARY_LINK_<LANG>_FLAGS is intended
>to be equivalent to "-rdynamic" on Linux, but the AIX platform file
>is using it for other flags too:
>
>> set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-Wl,-brtl,-bnoipath,-bexpall")
>
>This should be just
>
> set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-Wl,-bexpall")
>
>and the `-Wl,-brtl,-bnoipath` flags should move elsewhere.  One could
>add them directly to the CMAKE_${lang}_LINK_EXECUTABLE command line,
>for example.
>
>Thanks,
>-Brad
>