Library compiling correctly?

[Luke957]

How I get flann/eigen/boost/pcl/opencv/gtsam correctly built?

Thanks

[matlabbe]

See https://github.com/introlab/rtabmap/issues/74

[Luke957]

I can't find the instruction because I don't know how to find this
libraries and how to install them.
I tried

$export  ANDROID_NDK="Path to android ndk"
$export  ANDROID_NATIVE_API_LEVEL=android-17
$cd  rtabmap/build
$ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake_modules/android.toolchain.cmake -DBUILD_SHARED_LIBS=OFF -DBUILD_TOOLS=OFF -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=~/android_install ..
$ make
$ adb install -r app/android/bin/RTABMap-debug.apk


but it's not enough

[matlabbe]

Well, if you only do that, CMake would tell you that some libraries are missing. Until you fix them, the apk will never be built.

Cross-compilation is not easy, particularly for libraries not supporting it officially. However, most dependencies (those CMake complaining about) would have a cmake build system like rtabmap. So the make approach is similar.

To find the dependencies, look for them on Google, get the source and build them with the android toolchain (android.toolchain.cmake).

Android NDK: https://developer.android.com/ndk/downloads/index.html
FLANN: http://www.cs.ubc.ca/research/flann/ (cmake build)
EIGEN: http://eigen.tuxfamily.org/index.php?title=Main_Page (no cmake, just make install in ~/android_install)
BOOST: http://www.boost.org/ (see referred issue above to download a convenience cmake build file)
PCL: http://pointclouds.org/ (cmake build)

cheers

[Luke957]

Thank you very much!
That's what I was looking for and now is more clear than ever!

Thanks!