Cross-Compiling C++ OpenCV project on Ubuntu 12.04 for Windows 7

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I am new to cross compiling and have a problem with compiling a C++ project using OpenCV 2.4.9 on Ubuntu 12.04 for Windows 7. Unfortunately I did not find an appropriate solution here or elsewhere on the web.

Here are some more details:

• I use cmake to create the makefiles


• Compilation works fine for Ubuntu


• I installed mingw32


• I had to add some symbolic links to /usr/local/include/opencv2/ in the /usr/i586-mingw32msvc/include/ folder to resolve dependencies.

My Toolchain-mingw32.cmake looks like this:

SET(CMAKE_SYSTEM_NAME Windows)

SET(CMAKE_C_COMPILER i586-mingw32msvc-gcc)
SET(CMAKE_RC_COMPILER i586-mingw32msvc-windres)
SET(CMAKE_CXX_COMPILER i586-mingw32msvc-g++)

SET(CMAKE_FIND_ROOT_PATH /usr/i586-mingw32msvc)

SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

My CMakeLists.txt looks like this:

cmake_minimum_required(VERSION 2.8.3)
project(process)

find_package(OpenCV REQUIRED)
if(OPENMP_FOUND)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
endif()

set(CMAKE_BUILD_TYPE Release)

add_executable(process process.cpp <more .cpp-files>)

target_link_libraries(process ${OpenCV_LIBS} ${OpenMP_LIBS})

When I run cmake in the build folder (build/x86/windows/release)

cmake -DCMAKE_TOOLCHAIN_FILE=../../../../src/Toolchain-mingw32.cmake 
   ../../../../src/

I get the following result:

-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/i586-mingw32msvc-gcc
-- Check for working C compiler: /usr/bin/i586-mingw32msvc-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/i586-mingw32msvc-g++
-- Check for working CXX compiler: /usr/bin/i586-mingw32msvc-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: build/x86/windows/release

Then I make and get the following error:

make

Scanning dependencies of target process
[  6%] Building CXX object CMakeFiles/http://ift.tt/1r1igHs
...
[100%] Building CXX object CMakeFiles/http://ift.tt/1nifFnP
make[2]: *** No rule to make target `opencv_videostab-NOTFOUND', needed by `process.exe'.  Stop.
make[1]: *** [CMakeFiles/process.dir/all] Error 2
make: *** [all] Error 2

Cross compiling without special dependencies works. Any help is appreciated!

asked 44 secs ago

manselm

16

Cross-Compiling C++ OpenCV project on Ubuntu 12.04 for Windows 7