install a Debug version of library (Bug #260)

Forget to add the error:

...
[100%] Built target opencv_ffmpeg
Install the project...
-- Install configuration: "Release"
CMake Error at src/cxcore/cmake_install.cmake:49 (FILE):
file INSTALL cannot find
"C:/Libs/OpenCV/2.x/MinGW/debug/bin/libcxcore210.dll".
Call Stack (most recent call first):
src/cmake_install.cmake:32 (INCLUDE)
cmake_install.cmake:32 (INCLUDE)

mingw32-make: *** [INSTALL] Error 1

The BUILD_TYPE variable is set in a lot of files

Doing a:

I obtain, 

<pre>

3rdparty/include/png.h:#  define PNG_LIBPNG_BUILD_TYPE \
3rdparty/include/png.h:#    define PNG_LIBPNG_BUILD_TYPE \
3rdparty/include/png.h:#    define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
3rdparty/flann/CMakeLists.txt:#set(CMAKE_BUILD_TYPE Debug)
3rdparty/flann/.svn/text-base/CMakeLists.txt.svn-base:#set(CMAKE_BUILD_TYPE Debug)
CMakeLists.txt:# In case of Makefiles if the user does not setup CMAKE_BUILD_TYPE, assume it's Release:
CMakeLists.txt:    if("${CMAKE_BUILD_TYPE}" STREQUAL "")
CMakeLists.txt:        set(CMAKE_BUILD_TYPE Release)
[[OpenCVPCHSupport]].cmake:  STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name)
[[OpenCVPCHSupport]].cmake:  SET(_output "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch/${_targetName}_${CMAKE_BUILD_TYPE}.gch")
[[OpenCVPCHSupport]].cmake:  IF(NOT CMAKE_BUILD_TYPE)
[[OpenCVPCHSupport]].cmake:      "You must set CMAKE_BUILD_TYPE!" 
[[OpenCVPCHSupport]].cmake:  ENDIF(NOT CMAKE_BUILD_TYPE)
release/cxcore/cmake_install.cmake:  IF(BUILD_TYPE)
release/cxcore/cmake_install.cmake:           CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
release/cxcore/cmake_install.cmake:  ELSE(BUILD_TYPE)
release/cxcore/cmake_install.cmake:  ENDIF(BUILD_TYPE)
release/ml/cmake_install.cmake:  IF(BUILD_TYPE)
release/ml/cmake_install.cmake:           CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
release/ml/cmake_install.cmake:  ELSE(BUILD_TYPE)
release/ml/cmake_install.cmake:  ENDIF(BUILD_TYPE)
release/cv/cmake_install.cmake:  IF(BUILD_TYPE)
release/cv/cmake_install.cmake:           CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
release/cv/cmake_install.cmake:  ELSE(BUILD_TYPE)
release/cv/cmake_install.cmake:  ENDIF(BUILD_TYPE)
release/CMakeCache.txt:CMAKE_BUILD_TYPE:STRING=RELEASE
release/cvaux/cmake_install.cmake:  IF(BUILD_TYPE)
release/cvaux/cmake_install.cmake:           CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
release/cvaux/cmake_install.cmake:  ELSE(BUILD_TYPE)
release/cvaux/cmake_install.cmake:  ENDIF(BUILD_TYPE)
release/cmake_install.cmake:  IF(BUILD_TYPE)
release/cmake_install.cmake:           CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
release/cmake_install.cmake:  ELSE(BUILD_TYPE)
release/cmake_install.cmake:  ENDIF(BUILD_TYPE)
release/highgui/cmake_install.cmake:  IF(BUILD_TYPE)
release/highgui/cmake_install.cmake:           CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
release/highgui/cmake_install.cmake:  ELSE(BUILD_TYPE)
release/highgui/cmake_install.cmake:  ENDIF(BUILD_TYPE)
</pre>

The variable BUILD_TYPE is used but never defined. Therefore you can do two things:

 -# 1: Change all the BUILD_TYPE in CMAKE_BUILD_TYPE.
 -# 2: Create the variable BUILD_TYPE (set(BUILD_TYPE "${CMAKE_BUILD_TYPE}") in trunk/CMakeLists.txt)

i have the same problem. Basically, I use NMakefiles to build opencv, but nmake install only works for release builds. Even if I define CMAKE_BUILD_TYPE="Debug" on the cmake command line it still tries to install the release binaries, which it can't find, and fails.

D:\dev\opencv\debug>cmake -G "NMake Makefiles" -DCMAKE_INSTALL_PREFIX=..\ -DCMAKE_BUILD_TYPE=Debug -DBUILD_NEW_PYTHON_SUPPORT=OFF ..\
D:\dev\opencv\debug> nmake install
.
.
 [100%] Built target opencv_test_ml
Install the project...
-- Install configuration: "Release" 
CMake Error at modules/calib3d/cmake_install.cmake:44 (FILE):
  file INSTALL cannot find "D:/dev/opencv/debug/bin/opencv_calib3d211.dll".
Call Stack (most recent call first):
  modules/cmake_install.cmake:32 (INCLUDE)
  cmake_install.cmake:33 (INCLUDE)

NMAKE : fatal error U1077: 'D:\dev\cmake\bin\cmake.exe' : return code '0x1'
Stop.

Notice above how it reports installing the release version: "-- Install configuration: "Release"
despite that it had to be Debug. I tried to modify the toplevel CMakeLists.txt, but it appears the build type is reset somewhere else. I think this may be a cmake issue, as I have manually edited the generated cmake_install.cmake files to set the BUILD_TYPE to debug, which worked. Anyone has any additional information would be great to have this fixed.

First of all in Visual Studio (NMake) the CMAKE_BUILD_TYPE should not be touched, because all the type are defined in the same projects, then at compilation you can define which one to use (I don't know how to do this in NMAKE)

Then if you want to install debug you need to force the variable CMAKE_INSTALL_CONFIG_NAME="Debug" because the Cmake script will search by default the "Release" version, and as it can't find the installation failed.

as far as I know that you can't tell nmake which configuration at compile time. The way cmake generates Makefiles implies that all generated makefiles are of a single configuration type, either debug or release in the case of opencv.

After the Makefiles are generated you are supposed to use build targets to build (or install). So if you execute "nmake help" you only have a range of targets that allow you to build/install various things, but all these will be the same for the configuration.

For whatever reason the generated makefiles for the debug version revert the install target to Release, that's why I think is the problem. What you are suggesting with the CMAKE_INSTALL_CONFIG_NAME="Debug" does not work for me. Apparently, none of the suggestions above work.

I was able to overcome that by removing FORCE from

set(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "Configs" FORCE)

(CMakeLists.txt in the root directory) and then configuring with CMAKE_CONFIGURATION_TYPES="Debug". Don't know if it's the correct method...