如何使CMake使用环境变量LD_LIBRARY_PATH和C_INCLUDE_DIRS [英] How to make CMake use environment variable LD_LIBRARY_PATH and C_INCLUDE_DIRS

问题描述

是否有从cmake命令行传递C_INCLUDE_DIRS和LD_LIBRARY_PATH的方法，还是有办法设置env以便CMAKE可以找到并使用它们?

Is there a way to pass C_INCLUDE_DIRS and LD_LIBRARY_PATH from cmake command line or is there a way to set env so that CMAKE can find and use them?

推荐答案

目前尚不清楚您打算如何使用这些变量.这里有一些可能性:

It is not fully clear what you intend to do with these variables. Here are some possibilities:

1. 在CMake脚本中，您可以使用语法 $ ENV {< VARIABLE_NAME>} 读取环境变量.因此，在您的 CMakeLists.txt 中，您可以拥有类似

1. Inside a CMake script you can read environment variables using the syntax $ENV{<VARIABLE_NAME>}. So in your CMakeLists.txt you can have something like

message( "Found environment variable LD_LIBRARY_PATH=$ENV{LD_LIBRARY_PATH}" )

如果要添加此变量中包含的位置以供CMake目标可执行文件和库使用，则可以使用

或者，如果您有其他人的项目，并且想要指示CMake在某些其他目录中查找库，则可以使用 CMAKE_LIBRARY_PATH .例如，要在命令行中传递这些变量，您可以

Or if you have someone else's project and you want to instruct CMake to look for libraries in some additional directories you can use CMAKE_PREFIX_PATH or CMAKE_LIBRARY_PATH. For example to pass these variables in a command line you could do

cmake -D CMAKE_PREFIX_PATH=/path/to/custom/location

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