Building with CMake and ADT for Android

This file describes the steps to build OCCT libraries from a complete source package with following tools:

• Generation of eclipse project files
  • CMake v3.0+ http://www.cmake.org/cmake/resources/software.html
  • Cross-compilation toolchain for CMake https://github.com/taka-no-me/android-cmake
  • Android NDK rev.10+ https://developer.android.com/tools/sdk/ndk/index.html
  • Make: MinGW v4.82+ for Windows, GNU Make vXX for Linux. http://sourceforge.net/projects/mingw/files/
• Building eclipse project files of OCCT
  • Android Developer Tools (ADT) v22+ https://developer.android.com/sdk/index.html

Generation of eclipse project files

Run GUI tool provided by CMake: cmake-gui

Tools configuration

• Specify the root folder of OCCT ($CASROOT, which contains CMakelists.txt file) by clicking Browse Source.
• Specify the location (build folder) for Cmake generated project files by clicking Browse Build.

Click Configure button. It opens the window with a drop-down list of generators supported by CMake project. -

Select "Eclipse CDT4 - MinGW MakeFiles" item from the list

• Choose "Specify toolchain file for cross-compiling"
• Click "Next"
  
• Specify the Toolchain file at next dialog by android.toolchain.cmake is contained by cross-compilation toolchain for CMake
• Click "Finish"
  

Add cache entry ANDROID_NDK - path (entry type is PATH) to the NDK folder ("Add Entry" button)

if there is 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." Define CMAKE_MAKE_PROGRAM variable with the file path to mingw32-make executable.

OCCT Configuration

How to configure OCCT, see "OCCT Configuration" section of Building with CMake taking into account the specific configuration variables for android:

• ANDROID_ABI = armeabi-v7a
• ANDROID_NATIVE_API_LEVEL = 15
• ANDROID_NDK_LAYOUT is equal to BUILD_CONFIGURATION variable
• CMAKE_ECLIPSE_VERSION is equal to installed eclipse version (e.g., 4.2)

Configure parallel building:

• CMAKE_ECLIPSE_MAKE_ARGUMENTS = -jN where N = your numbers of CPU cores (threads)

Generation of eclipse projects files

Click Generate button and wait until the generation process is finished. Then the eclipse project files will appear in the build folder (e.g. D:/android-build-eclipse-api-15 ).

Building eclipse project files of OCCT

• Open eclipse (downloaded ADT bundle contains it)
  
• Import "Existing project into Workspace"
  

• Build ALL
  

When the building process has finished, libraries are located in <build folder>/out (e.g. D:/android-build-eclipse-api-15/out ).