When cross-compiling to Android, the code ```cmake include_directories(${CMAKE_SYSROOT_COMPILE}/usr/include) ``` causes the `-isystem /path/to/sysroot/usr/include` argument that CMake adds to move too early in the command line. This directory is listed in `CMAKE_${lang}_STANDARD_INCLUDE_DIRECTORIES` and therefore should be added only at the end of the command line. It should be filtered out of user-specified directories because it is an implicit include directory. This was discovered by discussion in [Android NDK issue 452](https://github.com/android-ndk/ndk/issues/452).