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cmake: install pkg-config file relative to current_binary_dir

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When the testsuite is enabled, the "cmake_add_subdirectory" test
adds a second copy of the project into the build configuration, and the
project files are installed twice.

This becomes super problematic when it tries to install a file from
CMAKE_BINARY_DIR which is only available in CMAKE_CURRENT_BINARY_DIR
and bombs out with the following error message:

```
[...]
-- Installing: <DESTDIR>/usr/lib/cmake/nlohmann_json/nlohmann_jsonTargets.cmake
CMake Error at test/cmake_add_subdirectory/nlohmann_json/cmake_install.cmake:73 (file):
  file INSTALL cannot find
  "......./nlohmann-json/builddir/test/cmake_add_subdirectory/nlohmann_json.pc":
  No such file or directory.
Call Stack (most recent call first):
  test/cmake_add_subdirectory/cmake_install.cmake:47 (include)
  test/cmake_install.cmake:49 (include)
  cmake_install.cmake:94 (include)
```
This commit is contained in:
Eli Schwartz 2020-07-27 18:15:18 -04:00
parent d34771cafc
commit aa06a4761e
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GPG key ID: CEB167EFB5722BD6
1 changed files with 1 additions and 1 deletions
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2
CMakeLists.txt
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@ -157,7 +157,7 @@ endif()
DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR} DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
) )
install( install(
FILES "${CMAKE_BINARY_DIR}/${PROJECT_NAME}.pc" FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
DESTINATION lib/pkgconfig DESTINATION lib/pkgconfig
) )
endif() endif()