如何在MacOS上使用CMake设置多个RPATH目录

Question

我们如何在MacOS上的CMake中设置目标上的多个RPATH目录？在Linux上,我们可以使用以冒号分隔的列表:

set_target_properties(mytarget
    PROPERTIES
    INSTALL_RPATH "\$ORIGIN/../lib:\$ORIGIN/../thirdparty/lib"
)

在MacOS上,我们可以在技术上添加冒号分隔列表并otool -l显示它,但不搜索这些目录:

set_target_properties(mytarget
    PROPERTIES
    INSTALL_RPATH "@loader_path/../lib:@loader_path/../thirdparty/lib"
)

通常情况下,如果我要在MacOS上有多个RPATH目录,我会发送多个链接器标志,这些标志将单独显示otool -l.就像是:

g++-mp-4.7 mytarget.cpp -o mytarget -Wl,-rpath,@loader_path/../lib,-rpath,@loader_path/../thirdparty/lib

这使:

Load command 15
          cmd LC_RPATH
      cmdsize 32
         path @loader_path/../lib (offset 12)
Load command 16
          cmd LC_RPATH
      cmdsize 48
         path @loader_path/../thirdparty/lib (offset 12)

如何使用CMake重新创建此行为？

Answer 1

根据文档,路径不应该用冒号分隔,而是用分号分隔:

set_target_properties(mytarget
    PROPERTIES
    INSTALL_RPATH "@loader_path/../lib;@loader_path/../thirdparty/lib"
)

或者,使用命令set让CMake处理分隔符:

set(MY_INSTALL_RPATH
    "@loader_path/../lib"
    "@loader_path/../thirdparty/lib"
)
set_target_properties(mytarget
    PROPERTIES
    INSTALL_RPATH "${MY_INSTALL_RPATH}"
)

编辑:(感谢Tsyvarev的评论)

或者,使用set_property接受多值属性的命令:

set_property(
    TARGET mytarget
    PROPERTY INSTALL_RPATH
    "@loader_path/../lib"
    "@loader_path/../thirdparty/lib"
)