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acfac7ae4a
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
15 lines
307 B
PkgConfig
15 lines
307 B
PkgConfig
#libevent pkg-config source file
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prefix=@prefix@
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exec_prefix=@exec_prefix@
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libdir=@libdir@
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includedir=@includedir@
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Name: libevent_extra
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Description: libevent_extra
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Version: @VERSION@
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Requires: libevent_core
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Libs: -L${libdir} -levent_extra@CMAKE_DEBUG_POSTFIX@
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Libs.private: @LIBS@
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Cflags: -I${includedir}
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