从 CMakeLists.txt 文件设置 CMAKE_INSTALL_PREFIX [英] Setting CMAKE_INSTALL_PREFIX from CMakeLists.txt file

问题描述

如何在我的根 CMakeLists.txt 文件中设置 CMAKE_INSTALL_PREFIX?

How do I set CMAKE_INSTALL_PREFIX in my root CMakeLists.txt file?

我一直在做

cmake_minimum_required(VERSION 2.8)
project(MyProject)

# Set default install prefix
set(CMAKE_INSTALL_PREFIX ${CMAKE_SOURCE_DIR})

希望通过安装将注定到源代码树中的文件夹.也就是说，

with the hopes that by installations would be destined to folders in the source tree. That is,

install(TARGETS my_exe DESTINATION bin/)

将安装到 ${CMAKE_SOURCE_DIR}/bin/.相反，它不断尝试写入 /usr/local/bin(Ubuntu 14.04 的默认设置).

would install to ${CMAKE_SOURCE_DIR}/bin/. Instead, it keeps trying to write to /usr/local/bin (the default for Ubuntu 14.04).

我尝试了这个问题的答案，但我仍然得到当我检查 CMakeCache.txt 时，标准 usr/local/ 作为我的 CMAKE_INSTALL_PREFIX.

I tried the answers to this question, but I still get the standard usr/local/ as my CMAKE_INSTALL_PREFIX when I check CMakeCache.txt.

我唯一可行的解​​决方案是做

The only working solution I have is to do

install(TARGETS my_exe DESTINATION "${CMAKE_SOURCE_DIR}/bin/")

但这会消除用户指定要安装的 bin 目录位置的能力.

but this then removes the user's ability to specify where the bin directory to install is.

tl;dr 我希望 make install 默认自动安装到 ${CMAKE_SOURCE_DIR}，而不是 /usr/local/.

tl;dr I would like make install to automatically install to ${CMAKE_SOURCE_DIR} by default, rather than /usr/local/.

推荐答案

CMake 开发人员 建议 使用给定的模式更改 CMAKE_INSTALL_PREFIX 中 CMakeLists.txt 的默认值:

CMake developers suggest to use given pattern for change default value of CMAKE_INSTALL_PREFIX inside CMakeLists.txt:

# Use this snippet *after* PROJECT(xxx):
IF(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
  SET(CMAKE_INSTALL_PREFIX <path> CACHE PATH <comment> FORCE)
ENDIF(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)

<小时>

使用这种方法

---

Using that approach

# Use this snippet *before* PROJECT(xxx):
SET(CMAKE_INSTALL_PREFIX <path> CACHE PATH <comment>)

不推荐:

.. 解决方案取决于 PROJECT 命令的实现细节，并且非常脆弱，因为它在某些版本的 CMake 中意外"工作.我根本不认为这是一种选择.

.. solution depends on the implementation details of the PROJECT command and is very fragile since it works "accidentally" for some versions of CMake. I don't consider it to be an option at all.

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