【发布时间】：2014-06-12 21:05:34
【问题描述】：
TL;DR;
我正在尝试为 MinGW 构建 OpenCV。 cmake 一直抱怨没有健全的 CXX 编译器，尽管我可以使用 g++.exe 编译示例代码。
加长版
我尝试为 MinGW 找到一个二进制文件，but this didn't work。
我尝试为 MinGW 进行编译，但由于 sh.exe 不在 $PATH 中的一些错误而失败。我很困惑，因为重命名文件系统上的目标文件并没有解决问题。
E:\work\opencv\mybuild> cmake -G "MinGW Makefiles" ../sources
CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeMin
GWFindMake.cmake:22 (message):
sh.exe was found in your PATH, here:
C:/Users/desuna/AppData/Local/GitHub/PortableGit_054f2e797ebafd44a30203088cd3d
58663c627ef/bin/sh.exe
For MinGW make to work correctly sh.exe must NOT be in your path.
Run cmake from a shell that does not have sh.exe in your PATH.
If you want to use a UNIX shell, then use MSYS Makefiles.
Call Stack (most recent call first):
CMakeLists.txt:56 (project)
CMake Error: CMake was unable to find a build program corresponding to "MinGW Ma
kefiles". CMAKE_MAKE_PROGRAM is not set. You probably need to select a differe
nt build tool.
CMake Error: CMake was unable to find a build program corresponding to "MinGW Ma
kefiles". CMAKE_MAKE_PROGRAM is not set. You probably need to select a differe
nt build tool.
CMake Error: Error required internal CMake variable not set, cmake may be not be
built correctly.
Missing variable is:
CMAKE_CXX_COMPILER_ENV_VAR
CMake Error: Error required internal CMake variable not set, cmake may be not be
built correctly.
Missing variable is:
CMAKE_CXX_COMPILER
CMake Error: Could not find cmake module file: E:/work/opencv/mybuild/CMakeFiles
/2.8.12.2/CMakeCXXCompiler.cmake
CMake Error: Error required internal CMake variable not set, cmake may be not be
built correctly.
Missing variable is:
CMAKE_C_COMPILER_ENV_VAR
CMake Error: Error required internal CMake variable not set, cmake may be not be
built correctly.
Missing variable is:
CMAKE_C_COMPILER
CMake Error: Could not find cmake module file: E:/work/opencv/mybuild/CMakeFiles
/2.8.12.2/CMakeCCompiler.cmake
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!
后来有人告诉我，MSYS makefile 没有这个要求。现在有一个关于 C++ 编译器的错误。但是，正确识别了 C++ 编译器。另外，我尝试编译一个虚拟的 test.cxx 程序，它可以工作。
E:\work\opencv\mybuild> cmake -G "MSYS Makefiles" ../sources
-- The CXX compiler identification is GNU 4.8.1
-- The C compiler identification is GNU 4.8.1
-- Check for working CXX compiler: C:/MinGW/bin/g++.exe
-- Check for working CXX compiler: C:/MinGW/bin/g++.exe -- broken
CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeTes
tCXXCompiler.cmake:54 (message):
The C++ compiler "C:/MinGW/bin/g++.exe" is not able to compile a simple
test program.
It fails with the following output:
Change Dir: E:/work/opencv/mybuild/CMakeFiles/CMakeTmp
错误日志是：
Determining if the CXX compiler works failed with the following output:
Change Dir: E:/work/opencv/mybuild/CMakeFiles/CMakeTmp
Run Build Command:C:/PROGRA~2/GnuWin32/bin/make.exe "cmTryCompileExec1507552824/fast"
C:/PROGRA~2/GnuWin32/bin/make.exe -f CMakeFiles/cmTryCompileExec1507552824.dir/build.make CMakeFiles/cmTryCompileExec1507552824.dir/build
make.exe[1]: Entering directory `E:/work/opencv/mybuild/CMakeFiles/CMakeTmp'
"/C/Program Files (x86)/CMake 2.8/bin/cmake.exe" -E cmake_progress_report /E/work/opencv/mybuild/CMakeFiles/CMakeTmp/CMakeFiles 1
Building CXX object CMakeFiles/cmTryCompileExec1507552824.dir/testCXXCompiler.cxx.obj
/C/MinGW/bin/g++.exe -o CMakeFiles/cmTryCompileExec1507552824.dir/testCXXCompiler.cxx.obj -c /E/work/opencv/mybuild/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
process_begin: CreateProcess(NULL, /C/MinGW/bin/g++.exe -o CMakeFiles/cmTryCompileExec1507552824.dir/testCXXCompiler.cxx.obj -c /E/work/opencv/mybuild/CMakeFiles/CMakeTmp/testCXXCompiler.cxx, ...) failed.
make (e=2): The system cannot find the file specified.
make.exe[1]: *** [CMakeFiles/cmTryCompileExec1507552824.dir/testCXXCompiler.cxx.obj] Error 2
make.exe[1]: Leaving directory `E:/work/opencv/mybuild/CMakeFiles/CMakeTmp'
make.exe: *** [cmTryCompileExec1507552824/fast] Error 2
我的目标是在 Windows 7 下为 C++ 中的一个小型应用程序进行一步构建，该应用程序与 onecv_core、opencv_highgui 等链接。为此，看来我需要在 mingw 下使用 gcc 从源代码构建 OpenCV。请告知正确的方法是什么。
编辑：
我尝试了 barek 的答案，错误与 MSYS 目标相同 - 没有健全的 c++ 编译器。接下来我尝试了cmake-gui，指定了编译器。另外，我确保 MinGW/bin 在我的路径中。遵循错误消息：
CMake Error: CMake was unable to find a build program corresponding to "MinGW Makefiles". CMAKE_MAKE_PROGRAM is not set. You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "MinGW Makefiles". CMAKE_MAKE_PROGRAM is not set. You probably need to select a different build tool.
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_CXX_COMPILER_ENV_VAR
CMake Error: Could not find cmake module file: E:/work/opencv/mybuild/CMakeFiles/2.8.12.2/CMakeCXXCompiler.cmake
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_C_COMPILER_ENV_VAR
CMake Error: Could not find cmake module file: E:/work/opencv/mybuild/CMakeFiles/2.8.12.2/CMakeCCompiler.cmake
Configuring incomplete, errors occurred!
我怀疑问题出在一些非常愚蠢的地方，比如 CMAKE 无法更改目录，因为 MinGW 安装不当。
Here可以找到讨论，但是我：
- 检查 MinGW/bin 在我的路径中
- 还在
cmake-gui中手动指定了 C 和 C++ 编译器路径 - 使用 SourceForge 的安装程序安装 MinGW，并选中“Alter PATH”复选框。
【问题讨论】：
-
避免使用 msys，因为它会弄乱路径，只需使用常规 cmd.exe 运行 cmake，并构建常规 MinGW Makefile。在 PATH 上也有 mingw bin，因为它想运行 mingw32-make 而不是 make then
-
@berak，感谢您的提示。您对如何应对
For MinGW make to work correctly sh.exe must NOT be in your path.有什么建议吗？我绑定重命名文件，然后使用cmd.exe，但没有任何变化。