问题描述
我在项目上使用cmake，并在工具链文件中更改CMAKE_CXX_FLAGS的值，但更改未达到我的预期。这是我用来指定编译器，添加编译器标志和添加链接器标志的cmake工具链文件。
set(CMAKE_SYstem_NAME Windows)
set(CMAKE_SYstem_PROCESSOR AMD64)
set(compiler "C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.27.29110/bin/Hostx64/x64/cl.exe")
set(CMAKE_C_COMPILER ${compiler})
set(CMAKE_CXX_COMPILER ${compiler})
set(prgx86 "C:/Program Files (x86)")
set(winkit_include_root "${prgx86}/Windows Kits/10/Include/10.0.18326.0")
set(inc_a "/I/\"${prgx86}/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.27.29110/include\"")
set(inc_b "/I/\"${winkit_include_root}/um\"")
set(inc_c "/I/\"${winkit_include_root}/ucrt\"")
set(inc_d "/I/\"${winkit_include_root}/shared\"")
set(CMAKE_C_FLAGS "${inc_a} ${inc_b} ${inc_c} ${inc_d}")
set(CMAKE_CXX_FLAGS "${inc_a} ${inc_b} ${inc_c} ${inc_d}")
set(lib_a "/LIBPATH:\"${prgx86}/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.27.29110/lib/x64\"")
set(lib_b "/LIBPATH:\"${prgx86}/Windows Kits/10/Lib/10.0.18326/um/x64\"")
set(lib_c "/LIBPATH:\"${prgx86}/Windows Kits/10/Lib/10.0.18326/ucrt/x64\"")
set(CMAKE_EXE_LINKER_FLAGS "${lib_a} ${lib_b} ${lib_c}")
这里的问题是set(CMAKE_CXX_FLAGS "...")行。当我尝试使用此工具链文件时，cmake无法构建简单的测试程序。这是我在执行cmake之后在CMakeError.log中发现的怪兽。
Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" Failed.
Compiler: C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.27.29110/bin/Hostx64/x64/cl.exe
Build flags: /I/"C:/Program;Files;(x86)/Microsoft;Visual;Studio/2019/Community/VC/Tools/MSVC/14.27.29110/include";/I/"C:/Program;Files;(x86)/Windows;Kits/10/Include/10.0.18326.0/um";/I/"C:/Program;Files;(x86)/Windows;Kits/10/Include/10.0.18326.0/ucrt";/I/"C:/Program;Files;(x86)/Windows;Kits/10/Include/10.0.18326.0/shared"
Id flags:
The output was:
2
Microsoft (R) C/C++ Optimizing Compiler Version 19.27.29111 for x64
copyright (C) Microsoft Corporation. All rights reserved.
cl : Command line warning D9024 : unrecognized source file type 'Files',object file assumed
cl : Command line warning D9024 : unrecognized source file type '(x86)/Microsoft',object file assumed
cl : Command line warning D9024 : unrecognized source file type 'Visual',object file assumed
cl : Command line warning D9024 : unrecognized source file type 'Studio/2019/Community/VC/Tools/MSVC/14.27.29110/include"',object file assumed
cl : Command line warning D9024 : unrecognized source file type 'Files',object file assumed
cl : Command line warning D9024 : unrecognized source file type '(x86)/Windows',object file assumed
cl : Command line warning D9024 : unrecognized source file type 'Kits/10/Include/10.0.18326.0/um"',object file assumed
cl : Command line warning D9024 : unrecognized source file type 'Kits/10/Include/10.0.18326.0/ucrt"',object file assumed
cl : Command line warning D9024 : unrecognized source file type 'Kits/10/Include/10.0.18326.0/shared"',object file assumed
CMakeCXXCompilerId.cpp
Microsoft (R) Incremental Linker Version 14.27.29111.0
copyright (C) Microsoft Corporation. All rights reserved.
/out:Files.exe
Files
(x86)/Microsoft
Visual
Studio/2019/Community/VC/Tools/MSVC/14.27.29110/include\
Files
(x86)/Windows
Kits/10/Include/10.0.18326.0/um\
Files
(x86)/Windows
Kits/10/Include/10.0.18326.0/ucrt\
Files
(x86)/Windows
Kits/10/Include/10.0.18326.0/shared\
CMakeCXXCompilerId.obj
LINK : Fatal error LNK1181: cannot open input file 'Files.obj'
Detecting C compiler ABI info Failed to compile with the following output:
Change Dir: C:/Users/underdisc/home/tech/varkor/build/msvc64/CMakeFiles/CMakeTmp
当cmake实际上将每个空格解释为不同标志的分隔符时，它们实际上是单个标志的一部分，这似乎很明显。我尝试用反斜杠转义这些空格，结果是相同的。有没有办法按预期方式将这些标志传递给编译器？ cmake的版本是3.18.1。
小笔记
这与问题无关，但是与我在做什么有关，以防万一有人好奇他们在看什么。我正在尝试从Windows上的mintty-tmux终端设置中构建项目。我想避免使用Visual Studio附带的开发人员命令提示符。我过去和最近都尝试使用vcvars[32|64].bat文件，但是它们从未起作用。我认为这与我的cygwin设置有关，但我不知道确切的原因。我也只使用cygwin的一组有限的东西。例如，我使用的是cmake的本机Windows版本，而不是cygwin附带的版本。
解决方法
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