相关疑难解决方法(0)

我希望能够从已安装的库中导入目标，但是使用时：

install(TARGETS
        foobar
        EXPORT foobarLibTargets
        LIBRARY DESTINATION lib)

cmake生成一个包含绝对路径的foob​​arLibTargets.cmake：

set_target_properties(foobar PROPERTIES
        IMPORTED_LOCATION_NOCONFIG "/where/I/happened/to/build/libfoobar.so"
        IMPORTED_SONAME_NOCONFIG "libfoobar.so"
)

这样，使用从安装中导入的目标的构建将由于路径不存在而失败。

问：如何获取正确的相对位置？

这等效于：

set_target_properties(foobar PROPERTIES
                      IMPORTED_LOCATION_NOCONFIG "@PACKAGE_LIBRARY_INSTALL_DIR@/libfoobar.so")

如果我看另一个工作类似但可行的项目，它有：

set_target_properties(foobar PROPERTIES
         IMPORTED_LOCATION_RELEASE "${_IMPORT_PREFIX}/lib/libfoobar.so"
         IMPORTED_SONAME_RELEASE "libfoobar.so"
)

以下是一些重现此问题的示例文件：

CMakeLists.txt：

cmake_minimum_required(VERSION 3.7)
project(FOOBAR VERSION 1.2.3)
set(VERSION 1.2.3)

set(CMAKE_INSTALL_RPATH "$ORIGIN/../lib:$ORIGIN/")
set(CMAKE_INSTALL_PREFIX "/opt/foobar" CACHE PATH "Install path prefix" FORCE)

add_library(foobar SHARED
  foobar.cpp
)

set(CPACK_INCLUDE_TOPLEVEL_DIRECTORY 0)
set(CPACK_PACKAGE_NAME "foobar")

set(CPACK_PACKAGE_VERSION ${VERSION})
set(CPACK_PACKAGING_INSTALL_PREFIX ${CMAKE_INSTALL_PREFIX})
set(CPACK_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}")

include(CPack)

# Indicate the content of the distribution pakcages
install(FILES
  ${CMAKE_SOURCE_DIR}/foobar.h
  DESTINATION include
) …