+The `/usr/lib32` refers to the path where the 32-bits shared objects are may
+differ depending on the actual Linux distribution.
+
+
+Android
+-------
+
+Additional requirements:
+
+* [Android NDK](http://developer.android.com/sdk/ndk/index.html)
+
+Build as:
+
+ export ANDROID_NDK=/path/to/your/ndk
+ cmake -DCMAKE_TOOLCHAIN_FILE=cmake/toolchain/android.toolchain.cmake -DANDROID_API_LEVEL=9 -H. -Bbuild
+ make -C build
+
+You can also choose a particular ABI by passing `ANDROID_ABI` variable to
+cmake, e.g., `-DANDROID_ABI=x86`.
+
+FirefoxOS
+---------
+
+Put Apitrace source tree into `B2GROOT/external/apitrace/` and the `Android.mk`
+file (`B2GROOT/external/apitrace/Android.mk`) will do the needful to compile
+and install apitrace appropriately into the system image as part of FirefoxOS
+build process. It expects a linaro-type of Android NDK to be present in
+`../../prebuilt/ndk/android-ndk-r7` (ie `B2GROOT/prebuilt/ndk/android-ndk-r7`).
+