kc3-lang/libevent/libevent_pthreads.pc.in
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Hash : acfac7ae
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Date : 2022-12-01T18:39:52
Make dependency paths relocatable The generated configurations for both CMake and pkg-config included absolute paths to dependencies (OpenSSL, MbedTLS). This is contrary to the general CMake advise to create relocatable packages [1]. Additionally, when building both mbedtls and libevent via CMake's FetchContent in the same project, loading the project would fail with INTERFACE_INCLUDE_DIRECTORIES property contains path: "/home/user/project/cmake-build/_deps/mbedtls-build/include" which is prefixed in the source directory. The required changes include: - Adding the outer includes only to the BUILD_INTERFACE solves the makes the CMake paths relocatable and thus solves the FetchContent problem. - Updates to libevent_*.pc.in fixes the relocatable issues for pkg-config and properly declares currently missing dependencies. - Using components for linking to OpenSSL (requiring CMake 3.4) and MbedTLS. The new MbedTLS target names now match the component names of the MbedTLS' CMake project. - Use the Threads CMake library reference instead of a direct reference to support both built-in pthread and -lpthread. v2 (azat): get back CMAKE_REQUIRED_LIBRARIES [1] https://cmake.org/cmake/help/v3.25/manual/cmake-packages.7.html#creating-relocatable-packages
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libevent_pthreads.pc.in
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#libevent pkg-config source file prefix=@prefix@ exec_prefix=@exec_prefix@ libdir=@libdir@ includedir=@includedir@ Name: libevent_pthreads Description: libevent_pthreads adds pthreads-based threading support to libevent Version: @VERSION@ Requires: libevent_core Libs: -L${libdir} -levent_pthreads@CMAKE_DEBUG_POSTFIX@ Libs.private: @CMAKE_THREAD_LIBS_INIT@ @LIBS@ Cflags: -I${includedir}