cmake在Windows上生成错误，因为它使用uses作为转义序列 [英] cmake generate error on windows as it uses \ as escape seq

问题描述

我的cmake中有这样的东西：

I have something such as this in my cmake:

set(MyLib_SRC $ENV{MyLib_DIR}/MyLib.cpp)
add_library(MyLibrary STATIC ${MyLib_SRC})

但是当我运行cmake时，我正在收到此错误：

but when I ran the cmake, I am getting this error:

CMake Warning (dev) at CMakeLists.txt:97 (add_library):
Syntax error in cmake code when parsing string

D:\New\Development\Lib/myLib.cpp

Invalid escape sequence \N

Policy CMP0010 is not set: Bad variable reference syntax is an error.  Run
"cmake --help-policy CMP0010" for policy details.  Use the cmake_policy
command to set the policy and suppress this warning.
This warning is for project developers.  Use -Wno-dev to suppress it.

我阅读了此操作系统答案 cmake解析错误：无效的转义序列，但是如何将宏（哪个宏！）更改为函数？

I read this OS answer cmake parse error :Invalid escape sequence \o but How can I chang the macro (which macro!) to a function?

env变量的值是

MyLib_DIR=D:\New\Development\Lib

推荐答案

问题是 $ ENV {MyLib_DIR} 逐字扩展环境变量，包括用作路径分隔符的反斜杠。然后，这些可以重新解释为转义序列。

The problem is that $ENV{MyLib_DIR} expands the environment variable verbatim, including the backslashes used as path separators. These can then get re-interpreted as escape sequences.

您要做的是在使用CMake代码处理之前，将路径转换为CMake的内部格式：

What you want to do is convert the path to CMake's internal format before handling it in CMake code:

file(TO_CMAKE_PATH $ENV{MyLib_DIR} MyLib_DIR)

set(MyLib_SRC ${MyLib_DIR}/MyLib.cpp)
add_library(MyLibrary STATIC ${MyLib_SRC})

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