Issue 6226 - Use mesonbuild as a build system

meson.build

-project('libadblockplus', 'cpp', default_options : ['cpp_std=c++11'], meson_version: '>0.40.0')
+project('libadblockplus', 'cpp', default_options : ['cpp_std=c++14'], meson_version: '>0.40.0')
 
 V8_DIR=join_paths('third_party', 'v8')
 
 #
 # A quick note about the terms.
 # -HOST_MACHINE is the machine we build on.
 # -TARGET_MACHINE is the machine we build for (like the Android phone)
 #
 # However, meson use the GNU terms where build_machine is HOST_MACHINE,
 # host_machine is TARGET_MACHINE, and target_machine isn't relevant here
@@ skipping 187 matching lines @@
 
 js_sources = custom_target('js_sources',
     input: load_before_files + load_after_files + library_files,
     output: 'adblockplus.js.cpp',
     command: [ 'python', join_paths(meson.source_root(), 'convert_js.py'),
                '@OUTPUT@',
                '--before', load_before_files,
                '--convert', library_files,
                '--after', load_after_files ])
 
+CXX_FLAGS = [ '-std=c++14' ]
 LIBRARIES = []
 if target_os == 'windows'
   LIBRARIES = [ 'shlwapi.lib', 'winhttp.lib', 'winmm.lib' ]
+else
+  CXX_FLAGS += '-fPIC'
+endif
+LD_FLAGS = []
+if android_target
+  LD_FLAGS += '-Wl,--allow-multiple-definition'
 endif
 adblockplus = shared_library('adblockplus', sources, js_sources,
                              v8_snapshot, v8_libsampler, v8_libplatform,
                              include_directories: incdir,
-                             cpp_args: [ '-std=c++11' ],
+                             cpp_args: CXX_FLAGS,
+                             link_args: LD_FLAGS,
                              link_with: LIBRARIES,
                              dependencies: [ have_curl ])
 
 test_sources = files(
   'test/AsyncExecutor.cpp',
   'test/BaseJsTest.h',
   'test/BaseJsTest.cpp',
   'test/AppInfoJsObject.cpp',
   'test/ConsoleJsObject.cpp',
   'test/DefaultFileSystem.cpp',
@@ skipping 33 matching lines @@
                       link_args: LINK_PARAMS,
                       include_directories: [
                          incdir,
                          include_directories(join_paths(GTEST_DIR, 'include'))
                       ])
 
    # Adjust the timeout to run the test. Default value is 30sec.
    #
    test('tests', tests, timeout: 60)
 endif