Re: [CMake] how to link a test with library in build directory, not with installed version?
On Tue, May 28, 2019 at 1:24 PM Aaron Cohen wrote: > b) Arrange that AConfig.cmake is installed to > /usr/lib/cmake/A/AConfig.cmake, which also exports an A::A target. This is > the "installed" version of the library, for consumers. > I was originally writing a longer answer and forgot to remove this part. You don't actually need to create/install this file if you are just concerned with testing within your project. (It's good to do in general, it's just un-related to your question). -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake
Re: [CMake] how to link a test with library in build directory, not with installed version?
For "modern cmake", you should:
1) When building libA:
a) Create an alias to your library (add_library A::A ALIAS A). This will
ensure that users are explicitly linking against a _target_ and not a file
named "libA" which just happens to match the name of the target you are
attempting to use.
b) Arrange that AConfig.cmake is installed to
/usr/lib/cmake/A/AConfig.cmake, which also exports an A::A target. This is
the "installed" version of the library, for consumers.
2) In your test CmakeLists, link against A::A rather than just A.
I believe that will work the way you want.
--Aaron
On Mon, May 27, 2019 at 11:58 AM Joachim Wuttke
wrote:
> How to link a test with a library as obtained in the build directory,
> not with the installed version, which may be outdated?
>
> Disclosure: cross-posted from https://stackoverflow.com/questions/56328326
> .
>
> == Use case ==
>
> Suppose
>
>cmake; make; ctest; make install
>
> works fine:
> - generates libA,
> - runs testB,
> - installs libA to ${CMAKE_INSTALL_LIBDIR}.
>
> Now I modify libA, and rerun
>make; ctest.
> No reaction to my modifications:
>ldd testB
> shows that the installed version of libA is used.
> Which is plain nonsense for a test.
>
> The test should always use the local version of libA, never the installed
> one.
>
> == Towards a solution ==
>
> I saw a lot of advise that involves RPATH, but found no variant that helps.
>
> So I hard-coded the path by changing
>target_link_libraries(testB PRIVATE A)
> into
>target_link_libraries(testB PRIVATE ${CMAKE_BINARY_DIR}/lib/libA.so).
>
> This works, but is no longer platform independent.
> How to solve my problem in a way that also works under Windows?
>
> - Joachim
>
> --
>
> Powered by www.kitware.com
>
> Please keep messages on-topic and check the CMake FAQ at:
> http://www.cmake.org/Wiki/CMake_FAQ
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> information on each offering, please visit:
>
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--
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[CMake] how to link a test with library in build directory, not with installed version?
How to link a test with a library as obtained in the build directory,
not with the installed version, which may be outdated?
Disclosure: cross-posted from https://stackoverflow.com/questions/56328326.
== Use case ==
Suppose
cmake; make; ctest; make install
works fine:
- generates libA,
- runs testB,
- installs libA to ${CMAKE_INSTALL_LIBDIR}.
Now I modify libA, and rerun
make; ctest.
No reaction to my modifications:
ldd testB
shows that the installed version of libA is used.
Which is plain nonsense for a test.
The test should always use the local version of libA, never the installed one.
== Towards a solution ==
I saw a lot of advise that involves RPATH, but found no variant that helps.
So I hard-coded the path by changing
target_link_libraries(testB PRIVATE A)
into
target_link_libraries(testB PRIVATE ${CMAKE_BINARY_DIR}/lib/libA.so).
This works, but is no longer platform independent.
How to solve my problem in a way that also works under Windows?
- Joachim
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--
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