C++ CMake 3.8.0在makefiles中生成错误的链接命令 问题：

在我运行cmake生成一个带有静态库的项目并成功完成后，ninja和mingw32都未能实现链接的目标。对于共享库或可执行文件，同样的设置效果很好。我在“忍者”和“MinGW Makefiles”生成器中都尝试过：

忍者输出：

[2/2] Linking CXX static library hello_wsl.lib
FAILED: hello_wsl.lib
cmd.exe /C "cd . && "C:\Program Files\CMake\bin\cmake.exe" -E remove hello_wsl.lib && "" qc hello_wsl.lib  CMakeFiles/hello_wsl.dir/lib_hello_world.cpp.obj && cd ."
"""" no se reconoce como un comando interno o externo,
programa o archivo por lotes ejecutable.
ninja: build stopped: subcommand failed.

mingw32生成输出：

Scanning dependencies of target hello_wsl
[ 50%] Building CXX object CMakeFiles/hello_wsl.dir/lib_hello_world.cpp.obj
[100%] Linking CXX static library hello_wsl.lib
Error running link command: El parámetro no es correcto
CMakeFiles\hello_wsl.dir\build.make:93: recipe for target 'hello_wsl.lib' failed
mingw32-make.exe[2]: *** [hello_wsl.lib] Error 2
CMakeFiles\Makefile2:66: recipe for target 'CMakeFiles/hello_wsl.dir/all' failed
mingw32-make.exe[1]: *** [CMakeFiles/hello_wsl.dir/all] Error 2
Makefile:82: recipe for target 'all' failed
mingw32-make.exe: *** [all] Error 2

还可以查看由“MinGW Makefiles”生成的“project\u root\build\CMakeFiles\hello\u wsl.dir\link.txt”：

---

分步骤复制“MinGW makefile”问题的示例项目：

• 安装CMake 3.8.0
• 安装MinGWx64 6.3 windows二进制文件（）
• 为这个项目创建一个根文件夹，在这个示例中我将它称为project\u root
• 在内部创建以下子文件夹：
• 项目\u根目录\build
• 项目\u根目录\include
• 项目\u root\include\lib\u hello\u world
• 创建以下文件：

• project\u root\include\lib\u hello\u world\lib\u hello\u world.cpp：

• project\u root\toolchain.cmake：

• project\u root\configure.bat：

• project\u root\build.bat：

• 最后，打开CMD并运行以下命令：

  project_root\configure.bat
  project_root\build.bat
  

---

这是我发现的一个粗略的修复/解决方法：

• 创建此文件： project\u root\fix.bat：

• 再现错误后，打开CMD并运行：

  project_root\fix.bat
  project_root\configure.bat
  project_root\build.bat
  

• 修复后的忍者输出（成功链接）：

• mingw32修复后生成（已成功链接）：

---

我做了几件事试图解决这个问题：

• 在应用修复程序并重新运行configure and build之前，我备份了CMakeCache.txt（CMakeCache.txt.before\u fix）。在重新配置并成功构建项目后，修复之前的CMakeCache.txt文件与CMakeCache.txt文件之间没有差异

• 我还备份了“rules.ninja”，然后将它们与FC进行了比较。这是FC“project\u root\rules.ninja.before\u fix”“project\u root\build\rules.ninja”的输出：

• 对“MinGW Makefiles”也是如此。这是FC“project\u root\link.txt.before\u fix”“project\u root\build\cmakfiles\lib\u hello\u world.dir\link.txt”的输出：

---

关于CMAKE_AR和CMAKE_RUNLIB变量有一些特定的定义：根据这些定义，它们应该声明为缓存的：

SET(CMAKE_AR      "$ENV{MINGW_W64_BIN_DIR}/ar.exe" CACHE FILEPATH "Arhiver")
SET(CMAKE_RANLIB  "$ENV{MINGW_W64_BIN_DIR}/ranlib.exe" CACHE FILEPATH "Runlib")

---

CMake不知道变量CMake_链接器。请参阅关于设置链接器。@Tsyvarev如果我在“project_root\toolchain.CMAKE”（最后一行）中定义它，它怎么会不知道CMAKE_链接器？“#链接器集（CMAKE_链接器“$ENV{MINGW_W64_BIN_DIR}/ld.bfd.exe”）？我应该能够在工具链文件中指定链接器，对吗？我的意思是，CMake在内部不使用CMake_链接器变量：该名称并不表示CMake有任何特殊之处。再次，请参阅我之前关于设置链接器的评论中提到的问题。链接器不用于构建静态库，因此它可能与您的问题无关。我刚刚指出，为了将来的工具链使用。非常感谢，你做到了！

# Target system (cross compile)
set(CMAKE_SYSTEM_NAME WindowsStore)
set(CMAKE_SYSTEM_VERSION 10.0)

# BIN utils
SET(CMAKE_AR      "$ENV{MINGW_W64_BIN_DIR}/ar.exe")
SET(CMAKE_OBJCOPY "$ENV{MINGW_W64_BIN_DIR}/objcopy.exe")
SET(CMAKE_OBJDUMP "$ENV{MINGW_W64_BIN_DIR}/objdump.exe")
SET(CMAKE_RANLIB  "$ENV{MINGW_W64_BIN_DIR}/ranlib.exe")
SET(CMAKE_NM      "$ENV{MINGW_W64_BIN_DIR}/nm.exe")
SET(CMAKE_STRIP   "$ENV{MINGW_W64_BIN_DIR}/strip.exe")

# C compiler
SET(CMAKE_C_COMPILER "$ENV{MINGW_W64_BIN_DIR}/gcc.exe")

# CXX compiler
SET(CMAKE_CXX_COMPILER "$ENV{MINGW_W64_BIN_DIR}/g++.exe")

# LINKER
SET(CMAKE_LINKER "$ENV{MINGW_W64_BIN_DIR}/ld.bfd.exe")

@ECHO OFF
SETLOCAL
@ECHO OFF
REM Change these variables to the corresponding paths on your own system
SET "CMAKE_EXECUTABLE=C:\Program Files\CMake\bin\cmake.exe"
SET "MINGW_W64_BIN_DIR=C:/Program Files/MinGWx64/bin"
CD "%~dp0\build"
CALL "%CMAKE_EXECUTABLE%" "-DCMAKE_EXPORT_COMPILE_COMMANDS=ON" "-DCMAKE_BUILD_TYPE=Debug" -G "MinGW Makefiles" "-DCMAKE_MAKE_PROGRAM='%MINGW_W64_BIN_DIR%/mingw32-make.exe'" "-DCMAKE_TOOLCHAIN_FILE='%~dp0/toolchain.cmake'" "%~dp0/include/lib_hello_world"
ENDLOCAL

@ECHO OFF
SETLOCAL
@ECHO OFF
REM Change this variable to the corresponding path on your own system
SET "MINGW_W64_BIN_DIR=C:/Program Files/MinGWx64/bin"
CD "%~dp0\build"
CALL "%MINGW_W64_BIN_DIR%/mingw32-make.exe"
ENDLOCAL

project_root\configure.bat
project_root\build.bat

@ECHO OFF
SETLOCAL
@ECHO OFF

MOVE "%~dp0\build\CMakeCache.txt" ".\"
RMDIR "%~dp0\build" /S /Q
MKDIR "%~dp0\build"
MOVE "%~dp0\CMakeCache.txt" ".\build\"

ENDLOCAL

project_root\fix.bat
project_root\configure.bat
project_root\build.bat

[2/2] Linking CXX static library hello_wsl.lib

Scanning dependencies of target hello_wsl
[ 50%] Building CXX object CMakeFiles/hello_wsl.dir/lib_hello_world.cpp.obj
[100%] Linking CXX static library hello_wsl.lib
[100%] Built target hello_wsl

Comparando archivos .\rules.ninja.before_fix y .\BUILD\RULES.NINJA
***** .\rules.ninja.before_fix
rule CXX_STATIC_LIBRARY_LINKER__lib_hello_world
command = cmd.exe /C "$PRE_LINK && "C:\Program Files\CMake\bin\cmake.exe" -E remove $TARGET_FILE && "" qc $TARGET_FILE $LINK_
FLAGS $in && $POST_BUILD"
description = Linking CXX static library $TARGET_FILE
***** .\BUILD\RULES.NINJA
rule CXX_STATIC_LIBRARY_LINKER__lib_hello_world
command = cmd.exe /C "$PRE_LINK && "C:\Program Files\CMake\bin\cmake.exe" -E remove $TARGET_FILE && C:\PROGRA~1\MinGWx64\bin\
ar.exe qc $TARGET_FILE $LINK_FLAGS $in && C:\PROGRA~1\MinGWx64\bin\ranlib.exe $TARGET_FILE && $POST_BUILD"
description = Linking CXX static library $TARGET_FILE
*****

Comparando archivos .\link.txt.before_fix y .\BUILD\CMAKEFILES\LIB_HELLO_WORLD.DIR\LINK.TXT
***** .\link.txt.before_fix
"" qc hello_wsl.lib  CMakeFiles/hello_wsl.dir/lib_hello_world.cpp.obj
***** .\BUILD\CMAKEFILES\LIB_HELLO_WORLD.DIR\LINK.TXT
C:\PROGRA~1\MinGWx64\bin\ar.exe qc lib_hello_world.lib  CMakeFiles/lib_hello_world.dir/lib_hello_world.cpp.obj
C:\PROGRA~1\MinGWx64\bin\ranlib.exe lib_hello_world.lib
*****

SET(CMAKE_AR      "$ENV{MINGW_W64_BIN_DIR}/ar.exe" CACHE FILEPATH "Arhiver")
SET(CMAKE_RANLIB  "$ENV{MINGW_W64_BIN_DIR}/ranlib.exe" CACHE FILEPATH "Runlib")