不知道如何为MinGW构建OpenCV [英] Not sure how to build OpenCV for MinGW

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问题描述

TL; DR;



我试图为MinGW构建OpenCV。 cmake 不断抱怨没有理智的CXX编译器，虽然我可以编译示例代码与g ++。



$ b


长版本



我尝试为MinGW ，但此操作无效。



我试图编译MinGW，但是失败，关于sh.exe在他的路径的一些错误。我很困惑，因为重命名文件系统上的目标文件没有解决问题。

  E：\work\opencv \mybuild> cmake -GMinGW Makefiles../sources 
 CMake错误在C：/ Program Files（x86）/ CMake 2.8 / share / cmake-2.8 / Modules / CMakeMin 
 GWFindMake.cmake：22 ）：
 sh.exe在您的PATH中找到，其中：
 
 
 C：/ Users / desuna / AppData / Local / GitHub / PortableGit_054f2e797ebafd44a30203088cd3d 
 58663c627ef / bin /sh.exe 
 
 
对于MinGW使正常工作sh.exe不能在您的路径中。 
 
从在PATH中没有sh.exe的shell运行cmake。 
 
如果要使用UNIX shell，请使用MSYS Makefiles。 
 
调用堆栈（最近调用）：
 CMakeLists.txt：56（project）
 
 
 CMake错误：CMake无法找到构建程序对应于MinGW Ma 
 kefiles。未设置CMAKE_MAKE_PROGRAM。你可能需要选择一个不同的
 nt构建工具。 
 CMake错误：CMake无法找到对应于MinGW Ma 
 kefiles的构建程序。未设置CMAKE_MAKE_PROGRAM。你可能需要选择一个不同的
 nt构建工具。 
 CMake错误：需要内部CMake变量未设置，cmake可能不是
正确构建。 
缺少变量是：
 CMAKE_CXX_COMPILER_ENV_VAR 
 CMake错误：需要内部CMake变量未设置，cmake可能不是
正确构建。 
缺少变量是：
 CMAKE_CXX_COMPILER 
 CMake错误：找不到cmake模块文件：E：/ work / opencv / mybuild / CMakeFiles 
 /2.8.12.2/CMakeCXXCompiler.cmake 
 CMake错误：需要内部CMake变量未设置错误，cmake可能不是
正确构建。 
缺少变量是：
 CMAKE_C_COMPILER_ENV_VAR 
 CMake错误：需要内部CMake变量未设置，cmake可能不是
正确构建。 
缺少变量是：
 CMAKE_C_COMPILER 
 CMake错误：找不到cmake模块文件：E：/ work / opencv / mybuild / CMakeFiles 
 /2.8.12.2/CMakeCCompiler.cmake 
 CMake错误：CMAKE_CXX_COMPILER未设置，在EnableLanguage后
 CMake错误：CMAKE_C_COMPILER未设置，在EnableLanguage后
  - 配置不完整，发生错误！

我后来被通知，MSYS的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。此外，我试着编译一个虚拟的test.cxx程序，它工作。

  E：\work\opencv\mybuild> ; cmake -GMSYS Makefiles../sources 
  -  CXX编译器标识是GNU 4.8.1 
  -  C编译器标识是GNU 4.8.1 
  - 检查工作CXX编译器：C：/ MinGW / bin / g ++。exe 
  - 检查工作CXX编译器：C：/ MinGW / bin / g ++。exe  -  broken 
 CMake错误在C：/ Program Files （x86）/ CMake 2.8 / share / cmake-2.8 / Modules / CMakeTes 
 tCXXCompiler.cmake：54（message）：
 C ++编译器C：/ MinGW / bin / g ++。exe能够编译一个简单的
测试程序。 
 
它失败，输出如下：
 
更改目录：E：/ work / opencv / mybuild / CMakeFiles / CMakeTmp

错误日志是：

 确定CXX编译器工作失败，输出如下：
更改Dir：E：/ work / opencv / mybuild / CMakeFiles / CMakeTmp 
 
运行构建命令：C：/ PROGRA〜2 / GnuWin32 / make.execmTryCompileExec1507552824 / fast
 C：/PROGRA~2/GnuWin32/bin/make.exe -f CMakeFiles / cmTryCompileExec1507552824.dir / build.make CMakeFiles / cmTryCompileExec1507552824.dir / build 
 
 make.exe [1]：进入目录`E：/ work / opencv / mybuild / CMakeFiles / CMakeTmp'
 
/ C / Program Files（x86）/ CMake 2.8 / bin / exe-E cmake_progress_report / E / work / opencv / mybuild / CMakeFiles / CMakeTmp / CMakeFiles 1 
 
构建CXX对象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，...）失败。 
 
 make（e = 2）：系统找不到指定的文件。 
 
 
 make.exe [1]：*** [CMakeFiles / cmTryCompileExec1507552824.dir / testCXXCompiler.cxx.obj]错误2 
 
 make.exe [1 ]：离开目录`E：/ work / opencv / mybuild / CMakeFiles / CMakeTmp'
 
 make.exe：*** [cmTryCompileExec1507552824 / fast]错误2

我的目标是在Windows 7下针对C ++中的一个小应用程序进行一步式构建，该程序链接到onecv_core，opencv_highgui等等。为此，似乎我需要从源代码构建OpenCV与gcc下mingw。请指出正确的方法。





编辑：



我试过 barek 的答案，错误与MSYS target相同 - 没有理智的c ++编译器。我接下来尝试了 cmake-gui ，指定了编译器。此外，我确保MinGW / bin在我的路径。按照错误消息：

  CMake错误：CMake无法找到与MinGW Makefiles对应的构建程序。未设置CMAKE_MAKE_PROGRAM。您可能需要选择一个不同的构建工具。 
 CMake错误：CMake无法找到对应于MinGW Makefiles的构建程序。未设置CMAKE_MAKE_PROGRAM。您可能需要选择一个不同的构建工具。 
 CMake错误：需要内部CMake变量未设置，需要CMake可能无法正确构建。 
缺少变量是：
 CMAKE_CXX_COMPILER_ENV_VAR 
 CMake错误：找不到cmake模块文件：E：/work/opencv/mybuild/CMakeFiles/2.8.12.2/CMakeCXXCompiler.cmake 
 CMake错误：需要内部CMake变量未设置，需要CMake可能无法正确构建。 
缺少变量是：
 CMAKE_C_COMPILER_ENV_VAR 
 CMake错误：找不到cmake模块文件：E：/work/opencv/mybuild/CMakeFiles/2.8.12.2/CMakeCCompiler.cmake 
配置不完整，错误发生！

我怀疑问题在于somethign真的很愚蠢，像CMAKE不能改变目录，



这里可以找到讨论，但我：




  • 检查MinGW / bin是否在我的路径

  • 在 cmake-gui
    • 中手动指定C和C ++编译器路径
  • 使用安装程序安装MinGW来自SourceForge并选择了勾选框Alter PATH。


解决方案


  1. 清理！删除所有以前的构建尝试， CmakeFile.cache 等。


  2. li>

  3. cmake -GMinGW Makefiles-D CMAKE_CXX_COMPILER = mingw32-g ++。exe -D CMAKE_MAKE_PROGRAM = mingw32-make.exe ..


  4. mingw32-make


  5. mingw32-make install



TL;DR;

I am trying to build OpenCV for MinGW. cmake keeps complaining about no sane CXX compiler, although I can compile sample code with g++.exe.

Long version

I tried finding a binary for MinGW, but this didn't work.

I tried compiling for MinGW, but that fails with some error about sh.exe being in he path. I am puzzled, as renaming the target file on the filesystem did not resolve the issue.

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!

I was advised later, that MSYS makefiles do not have this requirement. Now there was an error about the C++ compiler. However, the C++ compiler is correctly identified. Also, I tried compiling a dummy test.cxx program and it worked.

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

The error log is:

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

My aim is to have one-step build under Windows 7 for a small application in C++, that links against onecv_core, opencv_highgui and several more. For this, it appears that I need to build OpenCV from source with gcc under mingw. Please advise what is the correct approach to that.

EDIT:

I tried barek's answer, and the error is the same as with MSYS target - no sane c++ compiler. I next tried cmake-gui, specifying compilers. Also, I made sure that MinGW/bin is in my path. Follows the error message:

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!

I suspect the problem lies in somethign really stupid, like CMAKE not being able to change directories, due to impropper MinGW isntallation.

Here a discussion can be found, but I:

  • Checked that MinGW/bin is in my path
  • Also specified the C and C++ compiler paths manually in cmake-gui
  • Installed MinGW with the installer from SourceForge and selected the tickbox "Alter PATH".

解决方案

  1. cleanup! delete all previous build attempts, CmakeFile.cache, etc.

  2. have MingW/bin on the path

  3. make a folder within the opencv dir, called build_mingw, cd there

  4. cmake -G "MinGW Makefiles" -D CMAKE_CXX_COMPILER=mingw32-g++.exe -D CMAKE_MAKE_PROGRAM=mingw32-make.exe .. # <-- note the dots at the end

  5. mingw32-make

  6. mingw32-make install

这篇关于不知道如何为MinGW构建OpenCV的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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