[CMake] INSTALL(EXPORT) does not honor LINK_INTERFACE_LIBRARIES?

[Michael Hertling]

On 03/30/2011 03:14 PM, Rolf Eike Beer wrote:
>> On 03/30/2011 02:02 PM, Rolf Eike Beer wrote:
>>
>>>> However, I still don't understand the relation of that transitive
>>>> linking and its avoidance, respectively, to your initial complaint
>>>> about CMake's error message due to the missing library in another
>>>> library's export set. Unless I'm mistaken, you've a shared library
>>>> target "publiclib" which is linked explicitly against another target
>>>> "privatelib" via TARGET_LINK_LIBRARIES().
>>>
>>> Yes.
>>>
>>>> This means you can't place
>>>> publiclib in an export set without privatelib since the former could
>>>> not be set up properly w.r.t. its diverse IMPORTED properties if the
>>>> latter is not installed, too, i.e. INSTALL(EXPORT) could not generate
>>>> a valid export file.
>>>
>>> Yes, and that's basically the problem I have.
>>>
>>> Ok, I went and put every thing in the same export set. Which itself is a
>>> bit weird as I now have to INSTALL static libraries that were linked by
>>> the shared ones only to be able to specify that they are in the export
>>> set. And at the end all those libraries of course show up in the export.
>>> And I still see IMPORTED_LINK_DEPENDENT_LIBRARIES_DEBUG of the library
>>> that this is all about set to it's dependencies.
>>
>> W.r.t. *static* libraries, that's not necessary: If a shared library is
>> linked against a static one and the former prevents transitive linking
>> for the latter by setting LINK_INTERRFACE_LIBRARIES appropriately, the
>> static library does not need to be put in the shared one's export set:
>>
>> CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR)
>> PROJECT(PRIVATE C)
>> SET(CMAKE_VERBOSE_MAKEFILE ON)
>> FILE(WRITE ${CMAKE_BINARY_DIR}/f.c "void f(void){}\n")
>> ADD_LIBRARY(f STATIC f.c)
>> FILE(WRITE ${CMAKE_BINARY_DIR}/g.c "void g(void){f();}\n")
>> ADD_LIBRARY(g SHARED g.c)
>> TARGET_LINK_LIBRARIES(g f)
>> SET_TARGET_PROPERTIES(g PROPERTIES LINK_INTERFACE_LIBRARIES "")
>> INSTALL(TARGETS g EXPORT public LIBRARY DESTINATION lib)
>> INSTALL(EXPORT public DESTINATION share)
>>
>> In the export file, the static f isn't mentioned at all, and that's
>> perfect. Without LINK_INTERFACE_LIBRARIES set or with a *shared* f,
>> this does not work, of course.
> 
> What CMake version are you using? [...]

2.8.4

> [...] For me CMake is complaining that the
> public library depends on some private libraries that are not exported and
> they are static. [...]

Does the above-noted example fail with your version of CMake?

> [...] Only adding
> 
> INSTALL(TARGETS privstatic EXPORT myexport DESTINATION trash)
> 
> made CMake complete successfully, resulting in the static stuff showing up
> in the export, too.

Could you provide a minimal but complete example with that issue?

Regards,

Michael