cmake - cpack(创建 RPM)忽略 CMAKE_INSTALL_RPATH(将 RPATH 设置为空字符串 - 而不是显式值)

Question

我正在尝试使用 cpack 进行一个相当简单的实验。目的是使用一个简单的可执行文件创建一个 RPM 安装程序(使用 cpack)，该可执行文件使用外部第 3 方共享库(称为 libSomeSharedLib.so)。

我希望 RPM 安装的结构是

opt
|_cmakeFindPackageTest
  |_bin
    |_cmakeFindPackageTest (an executable)
  |_lib
    |_libSomeSharedLib.so (the shared library)

我希望可执行文件的 RPATH 为 /opt/cmakeFindPackageTest/lib (以确保它使用已安装的共享库)。

完整的 CMakeLists.txt 粘贴在底部，但请注意设置了以下属性

 15 SET(CMAKE_INSTALL_PREFIX "/opt/cmakeFindPackageTest")
 16 SET( INSTALL_DIR_BIN ${CMAKE_INSTALL_PREFIX}/bin )
 17 SET( INSTALL_DIR_LIB ${CMAKE_INSTALL_PREFIX}/lib )
 18 
 19 SET(CMAKE_INSTALL_RPATH "\${INSTALL_DIR_LIB}")
 20 SET(CMAKE_SKIP_BUILD_RPATH TRUE)
 21 SET(CMAKE_SKIP_INSTALL_RPATH FALSE)

据我了解，第 17,19,20 行应该导致 cpack 将可执行文件的 RPATH 设置为 /opt/cmakeFindPackageTest/lib

但是...

当我构建项目(从 clean 开始)并运行 cpack 来生成 RPM 时，我在输出中看到了这一点

bash-4.2$ cpack -V -G RPM
CPack: Enable Verbose
... irrelevant looking output ommitted ...
CPack Verbose: Set runtime path of "/local/bfarnham/workspace/OPC-UA/CMake_examples/cmakeFindPackageTest/build/_CPack_Packages/Linux/RPM/cmakeFindPackageTest-0.0.0-Linux/opt/cmakeFindPackageTest/bin/cmakeFindPackageTest" to ""

RPATH 被设置为空! 呃？用readelf检查过 - 果然如此

bash-4.2$ readelf -d ./_CPack_Packages/Linux/RPM/cmakeFindPackageTest-0.0.0-Linux/opt/cmakeFindPackageTest/bin/cmakeFindPackageTest | grep --context=1 -i RPATH
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x000000000000000f (RPATH)              Library rpath: []
 0x000000000000000c (INIT)               0x400848

最后，问题是:如何让 cpack 在 RPM 中设置此可执行文件的 RPATH？

================完整的CMakeLists.txt ================

  1 cmake_minimum_required( VERSION 3.0 )
  2 project( cmakeFindPackageTest CXX )
  3 set (CMAKE_CXX_STANDARD 11)
  4 
  5 list( INSERT CMAKE_MODULE_PATH 0 ${CMAKE_SOURCE_DIR}/cmake )
  6 message( STATUS "CMAKE_MODULE_PATH [${CMAKE_MODULE_PATH}]" )
  7 find_package( SomeSharedLib 1.0 REQUIRED MODULE )
  8 message( STATUS "SomeSharedLib_INCLUDE_DIR [${SomeSharedLib_INCLUDE_DIR}]  SomeSharedLib_LIBRARY [${SomeSharedLib_LIBRARY}]" )
  9 
 10 add_executable( cmakeFindPackageTest src/main.cpp )
 11 target_link_libraries( cmakeFindPackageTest SomeSharedLib::SomeSharedLib )
 12 
 13 # =============================== INSTALL DETAILS BELOW THIS POINT ==========================
 14 
 15 SET(CMAKE_INSTALL_PREFIX "/opt/cmakeFindPackageTest")
 16 SET( INSTALL_DIR_BIN ${CMAKE_INSTALL_PREFIX}/bin )
 17 SET( INSTALL_DIR_LIB ${CMAKE_INSTALL_PREFIX}/lib )
 18 
 19 SET(CMAKE_INSTALL_RPATH "\${INSTALL_DIR_LIB}")
 20 SET(CMAKE_SKIP_BUILD_RPATH TRUE)
 21 SET(CMAKE_SKIP_INSTALL_RPATH FALSE)
 22 SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH FALSE)
 23 
 24 SET(CPACK_PACKAGE_NAME cmakeFindPackageTest )
 25 SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "test")
 26 SET(CPACK_PACKAGE_VENDOR "TEST_VENDOR")
 27 SET(CPACK_PACKAGE_RELOCATABLE FALSE)
 28 SET(CPACK_PACKAGE_VERSION_MAJOR "0")
 29 SET(CPACK_PACKAGE_VERSION_MINOR "0")
 30 SET(CPACK_PACKAGE_VERSION_PATCH "0")
 31 
 32 install( TARGETS 
 33   cmakeFindPackageTest
 34   RUNTIME DESTINATION ${INSTALL_DIR_BIN} )
 35 
 36 install( FILES
 37   ${SomeSharedLib_LIBRARY}
 38   DESTINATION ${INSTALL_DIR_LIB} )
 39   
 40 include( CPack )

Answer 1

我通过显式设置可执行目标的 INSTALL_RPATH 属性值修复了此问题。因此，在调用 install

之后添加 set_target_properties 行

install( TARGETS 
  cmakeFindPackageTest
  RUNTIME DESTINATION ${INSTALL_DIR_BIN} )
set_target_properties( cmakeFindPackageTest PROPERTIES INSTALL_RPATH "/opt/cmakeFindPackageTest/lib" )

从 cmake/cpack 文档来看，设置 CMAKE_INSTALL_RPATH 变量似乎应该有效。 CMAKE_INSTALL_RPATH 文档读取

The rpath to use for installed targets.

A semicolon-separated list specifying the rpath to use in installed targets (for platforms that support it). This is used to initialize the target property INSTALL_RPATH for all targets.