c++ - cmake 在 Windows 上生成错误，因为它使用\as escape seq

Question

我的 cmake 中有这样的东西:

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

但是当我运行 cmake 时，出现了这个错误:

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.

我阅读了这个操作系统答案 cmake parse error :Invalid escape sequence \o但是如何将宏(哪个宏!)更改为函数？

环境变量的值为

MyLib_DIR=D:\New\Development\Lib

Answer 1

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

您要做的是在 CMake 代码中处理之前将路径转换为 ​​CMake 的内部格式:

file(TO_CMAKE_PATH $ENV{MyLib_DIR} MyLib_DIR)

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