[CMake] RPATH for pkg-config

Thu Jan 4 11:47:19 EST 2018

Are you still doing this at the end?  You are overwriting here, not adding.

IF("${isSystemDir}" STREQUAL "-1")
   SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
ENDIF("${isSystemDir}" STREQUAL "-1")

Also, do not use ':', use ';' instead as a separator.  Or use 'list(APPEND
...), to add to a list.

On Thu, Jan 4, 2018 at 8:34 AM, Franck Houssen <franck.houssen at inria.fr>
wrote:

> nope !... :D
>
> ------------------------------
>
> *De: *"Don Hinton" <hintonda at gmail.com>
> *À: *"Franck Houssen" <franck.houssen at inria.fr>
> *Cc: *"Andreas Naumann" <Andreas-Naumann at gmx.net>, cmake at cmake.org
> *Envoyé: *Jeudi 4 Janvier 2018 16:52:53
> *Objet: *Re: [CMake] RPATH for pkg-config
>
>
> On Thu, Jan 4, 2018 at 3:57 AM Franck Houssen <franck.houssen at inria.fr>
> wrote:
>
>> ------------------------------
>>
>> *De: *"Don Hinton" <hintonda at gmail.com>
>> *À: *"Franck Houssen" <franck.houssen at inria.fr>
>> *Cc: *"Andreas Naumann" <Andreas-Naumann at gmx.net>, cmake at cmake.org
>> *Envoyé: *Jeudi 4 Janvier 2018 10:43:28
>>
>>
>> *Objet: *Re: [CMake] RPATH for pkg-config
>>
>> The cmake rpath settings handle build/install directories more or less
>> automatically, but you need to add a completely different path.
>>
>>
>> Yes. That's the problem: I need to add a completely different path.
>>
>>
>> Try adding the additional path (pretty much every -L you added) to
>> CMAKE_INSTALL_RPATH, and set CMAKE_BUILD_WITH_INSTALL_RPATH=TRUE.
>>
>>
>> See does not work
>>
>> >> more ../CMakeLists.txt
>> ...
>>
>> foreach(dir ${PETSc_LIBRARY_DIRS})
>>   link_directories(main PUBLIC ${dir})
>>   message("link_directories - dir is ${dir}")
>>   set(CMAKE_INSTALL_RPATH "${dir}:${CMAKE_INSTALL_RPATH}")
>> endforeach(dir)
>>
>
> s/:/;/
>
>
>> You need to use a semicolon instead is a colon as a cmake list separator.
>
>
>
> I wish it could have worked. Don't understand.
>
> I added a message
>
> >> cmake ..; make VERBOSE=1
> ...
> target_link_libraries - lib is -L/home/fghoussen/Documents/
> INRIA/petsc/local/lib
> target_link_libraries - lib is -lpetsc
> link_directories - dir is /home/fghoussen/Documents/INRIA/petsc/local/lib
> CMAKE_INSTALL_RPATH: /home/fghoussen/Documents/INRIA/petsc/local/lib;/usr/
> local/lib;/usr/local/lib;
> ...
> >> ldd main
>     linux-vdso.so.1 (0x00007ffdec8e8000)
>     libmpi_cxx.so.20 => /usr/lib/x86_64-linux-gnu/libmpi_cxx.so.20
> (0x00007f429a28a000)
>     libmpi.so.20 => /usr/lib/x86_64-linux-gnu/libmpi.so.20
> (0x00007f4299f94000)
>     libpetsc.so.3.8 => not found
>
>
>
>> ...
>> SET(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
>> ...
>>
>> >> cmake ..; make VERBOSE=1
>> ...
>> target_link_libraries - lib is -L/home/fghoussen/Documents/
>> INRIA/petsc/local/lib
>> target_link_libraries - lib is -lpetsc
>> link_directories - dir is /home/fghoussen/Documents/INRIA/petsc/local/lib
>> ...
>> [ 50%] Building CXX object CMakeFiles/main.dir/main.cpp.o
>> /usr/bin/c++   -I/usr/lib/x86_64-linux-gnu/openmpi/include/openmpi
>> -I/usr/lib/x86_64-linux-gnu/openmpi/include/openmpi/opal/
>> mca/event/libevent2022/libevent -I/usr/lib/x86_64-linux-gnu/
>> openmpi/include/openmpi/opal/mca/event/libevent2022/libevent/include
>> -I/usr/lib/x86_64-linux-gnu/openmpi/include -I/home/fghoussen/Documents/INRIA/petsc/local/include
>> -o CMakeFiles/main.dir/main.cpp.o -c /home/fghoussen/Downloads/
>> cmake/rpath-pkgconfig/main.cpp
>> [100%] Linking CXX executable main
>> /usr/bin/cmake -E cmake_link_script CMakeFiles/main.dir/link.txt
>> --verbose=1
>> /usr/bin/c++     CMakeFiles/main.dir/main.cpp.o  -o main
>> -Wl,-rpath,/usr/lib/x86_64-linux-gnu/openmpi/lib
>> /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so
>> /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi.so
>> -L/home/fghoussen/Documents/INRIA/petsc/local/lib -lpetsc
>> make[2]: Leaving directory '/home/fghoussen/Downloads/
>> cmake/rpath-pkgconfig/BUILD'
>> [100%] Built target main
>> make[1]: Leaving directory '/home/fghoussen/Downloads/
>> cmake/rpath-pkgconfig/BUILD'
>> /usr/bin/cmake -E cmake_progress_start /home/fghoussen/Downloads/
>> cmake/rpath-pkgconfig/BUILD/CMakeFiles 0
>>
>> >> ldd main
>>     linux-vdso.so.1 (0x00007ffcd876b000)
>>     libmpi_cxx.so.20 => /usr/lib/x86_64-linux-gnu/libmpi_cxx.so.20
>> (0x00007f9eaba1f000)
>>     libmpi.so.20 => /usr/lib/x86_64-linux-gnu/libmpi.so.20
>> (0x00007f9eab729000)
>>     libpetsc.so.3.8 => not found
>>
>>
>> Then run cmake with the ‘-v’ option and look at the link command to
>> verify rpath was passed correctly.
>>
>> You can also examine it in a library or executable with ‘objdump-x’.
>>
>> You may want to customize this for your project, but this should get you
>> started.
>>
>> hth...
>> don
>>
>> On Thu, Jan 4, 2018 at 1:25 AM Franck Houssen <franck.houssen at inria.fr>
>> wrote:
>>
>>> My understanding is that you need a local copy of FindPETSc.cmake: if
>>> this changes, you don't know it.
>>> That's why I tried to go with the pc file.
>>>
>>> ----- Mail original -----
>>> > De: "Andreas Naumann" <Andreas-Naumann at gmx.net>
>>> > À: cmake at cmake.org
>>> > Envoyé: Mercredi 3 Janvier 2018 21:41:51
>>> > Objet: Re: [CMake] RPATH for pkg-config
>>> >
>>> > What about using a FindPETSC-Module? Some hints are
>>> >      *http://jacobmerson.com/2016/01/17/cmake-petsc2.html
>>> >      *http://www.mcs.anl.gov/petsc/documentation/faq.html#cmake
>>> >
>>> > Regards,
>>> > Andreas
>>> >
>>> > Am 03.01.2018 um 21:35 schrieb Alexander Neundorf:
>>> > > On 2018 M01 3, Wed 10:08:09 CET Franck Houssen wrote:
>>> > >> Hello,
>>> > >>
>>> > >> How to ask cmake to add a library path (coming from pc file) to
>>> rpath ?
>>> > >>
>>> > >> I checked this https://cmake.org/Wiki/CMake_RPATH_handling, but
>>> still not
>>> > >> working. Can somebody help ?
>>> > >>>> more main.cpp
>>> > >> #include <petsc.h>
>>> > >>
>>> > >> int main(int argc, char ** argv) {
>>> > >> PetscInitialize(&argc, &argv, NULL, "");
>>> > >> PetscFinalize();
>>> > >> return 0;
>>> > >> }
>>> > >>
>>> > >>>> more CMakeLists.txt
>>> > >> cmake_minimum_required(VERSION 3.7)
>>> > >> enable_language(CXX)
>>> > >>
>>> > >> find_package(MPI REQUIRED)
>>> > >> find_package(PkgConfig REQUIRED) # Get pkg_check_modules.
>>> > >> pkg_check_modules(PETSc REQUIRED PETSc)
>>> > >>
>>> > >> project(main)
>>> > >> add_executable(main main.cpp)
>>> > >>
>>> > >> target_include_directories(main PUBLIC ${MPI_CXX_INCLUDE_PATH})
>>> > >> target_link_libraries(main PUBLIC ${MPI_CXX_LIBRARIES})
>>> > >>
>>> > >> target_include_directories(main PUBLIC ${PETSc_INCLUDE_DIRS})
>>> > >> foreach(lib ${PETSc_LDFLAGS})
>>> > >> target_link_libraries(main PUBLIC ${lib})
>>> > >> endforeach(lib)
>>> > > How does each ${lib} look like ?
>>> > > Is it "-lpetsc" or does it have the full path to the libraries ?
>>> > > You should use the full path to the libraries, otherwise cmake
>>> doesn't know
>>> > > where they are and the RPATH computation will not work.
>>> > >
>>> > >> foreach(dir ${PETSc_LIBRARY_DIRS})
>>> > >> link_directories(main PUBLIC ${dir}) # Not sure: is this needed ?
>>> > >> endforeach(dir)
>>> > > no, link_directories() in general should not be used.
>>> > >
>>> > >> # use, i.e. don't skip the full RPATH for the build tree
>>> > >> SET(CMAKE_SKIP_BUILD_RPATH FALSE)
>>> > >> # when building, don't use the install RPATH already
>>> > >> # (but later on when installing)
>>> > >> SET(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
>>> > >> SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
>>> > > If the automatic computation fails, you could add the petsc lib dir
>>> here as
>>> > > INSTALL_RPATH
>>> > >
>>> > > Alex
>>> > >
>>> >
>>> > --
>>> >
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>>> >
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>>
>>
>
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