Issue 6226 - Use mesonbuild as a build system

README.md

 libadblockplus
 ==============
 
 A C++ library offering the core functionality of Adblock Plus.
 
 Getting/updating the dependencies
 ---------------------------------
 
 libadblockplus has dependencies that aren't part of this repository. They are
 retrieved and updated during the build process, but you can also manually update
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 V8 doesn't support creating both from the same project files.
 * Open `build\ia32\libadblockplus.sln` or `build\x64\libadblockplus.sln` in
 Visual Studio and build the solution there. Alternatively you can use the
 `msbuild` command line tool, e.g. run `msbuild /m build\ia32\libadblockplus.sln`
 from the Visual Studio Developer Command Prompt to create a 32 bit debug build.
 
 Tested on Microsoft Visual Studio 2015 Community Edition.
 
 ### Building for Android
 
+#### Using Meson
+
+First set `ANDROID_NDK_ROOT` environment variable to your Android NDK directory.
+If you don't have one yet, do not worry.
+
+You need to initially run
+
+    ./cross-bootstrap.sh
+
+This will configure the cross files to the location of the NDK.
+If `ANDROID_NDK_ROOT` is not defined, then it will download it into
+`third_party` first.
+
+To configure a build
+
+    meson android-arm-build --cross-file cross/android-arm
+
+Then to build
+
+    ninja -C android-arm-build
+
+There are cross-files for android-x86 and android-arm64. You can use these
+to configure other targets.
+
+#### Using Make
+
 First set ANDROID_NDK_ROOT environment variable to your Android NDK directory.
 
 To build for *x86* arch run:
 
     make android_x86
 
 To build for *arm* or *arm64* arch run:
 
     make android_arm
 
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 Linting
 -------
 
 You can lint the code using [ESLint](http://eslint.org).
 
     npm run eslint
 
 In order to set up ESLint and
 [configuration eslint-config-eyeo](https://hg.adblockplus.org/codingtools/file/tip/eslint-config-eyeo) you need [Node.js 7 or higher](https://nodejs.org/) and once it is installed please run `npm install` in the repository directory.