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
 them by running the following:
 
     ./ensure_dependencies.py
 
 Building
 --------
 
 ### Supported target platforms and prerequisites
 
 You need a C++11 compatible compiler to build libadblockplus.
 
 Win32:
 * At least v140 Visual C++ toolset (available in Microsoft Visual Studio 2015).
 
 Linux:
 * g++ 5.2
+If building using meson:
+* meson 0.40.0
 
 Mac:
 * clang 3.6 for OS X/macOS (Xcode should be installed and its developer tools should be "selected").
 
 Android:
 * The host system should be Linux or OS X
 * android-ndk-r12b Here are the links for downloading
   [OS X](https://dl.google.com/android/repository/android-ndk-r12b-darwin-x86_64.zip), 
   [Linux 64](https://dl.google.com/android/repository/android-ndk-r12b-linux-x86_64.zip).
 * g++ multilib
 
 If you have a compilation issue with another compiler please [create an issue](https://issues.adblockplus.org/).
 
 You also need Python 2.7 and ensure that `python.exe` is in your `PATH`.
 
 ### Unix
 
-Using Make:
+You can use either `meson` or `make`.
+
+#### Using Meson:
+
+    meson build
+
+Then
+
+    ninja -C build
+
+To build and run the tests
+
+    ninja -C build test
+
+#### Using Make:
 
     make
 
 The default target architecture is the architecture of a host. In order to build for a different architecture pass `ARCH` to `make`, e.g. run:
 
     make ARCH=ia32
 
 supported values are `ia32` and `x64`.
-    
+
 
 To build and run the tests:
 
     make test
 
 Likewise, use the following with `ARCH`:
 
     make test ARCH=ia32
 
 To run specific tests, you can specify a filter:
 
     make test FILTER=*.Matches
 
 ### Windows
 
 * Execute `createsolution.bat` to generate project files, this will create
 `build\ia32\libadblockplus.sln` (solution for the 32 bit build) and
 `build\x64\libadblockplus.sln` (solution for the 64 bit build). Unfortunately,
 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
 
@@ skipping 182 matching lines @@
 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.