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

[CHEVRIER, Marc]

Hi,

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.

Problem can be reproduced using this very simple CMakeLists.txt:
cmake_minimum_required (VERSION 3.4)

project (TEST LANGUAGES CXX)

file (WRITE test.cpp "// empty\n")

add_executable (test_exe test.cpp)

This problem occurs on all platforms (tested on AIX and Linux).

Marc




On 09/12/15 15:41, "cmake-developers on behalf of CHEVRIER, Marc" <cmake-developers-bounces at cmake.org on behalf of marc.chevrier at sap.com> wrote:

>
>Oops !
>You are right, on a simple example, all is OK. So the problem seems on my side.
>I will investigate this curious behaviour…
>
>Sorry for the noise.
>
>Marc
>
>
>
>
>On 09/12/15 15:15, "Brad King" <brad.king at kitware.com> wrote:
>
>>On 12/09/2015 09:09 AM, CHEVRIER, Marc wrote:
>>> You are right. I missed this capability.
>>> My first idea was to apply to exec the same approach as for shared lib but I didn’t found appropriate variable: something like CMAKE_EXE_CREATE_<LANG>_FLAGS
>>> Or may be CMAKE_EXE_LINKER_FLAGS_INIT can be used but I am not sure of the usage of the *_INIT variables.
>>
>>Actually the old code has it in two places:
>>
>>> - set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-G -Wl,-bnoipath") # -shared
>>> - set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-Wl,-brtl,-bnoipath,-bexpall") # +s, flag for exe link to use shared lib
>>
>>The CREATE_ value is used when linking a shared library itself.
>>The LINK_ value is used to link executables.  Both should already
>>be getting the flag with no changes.
>>
>>-Brad
>>
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