Edit meson scripts to compile for Android

meson.build

@@ -17,6 +17,8 @@ pymod = import('python')
 python = pymod.find_installation('python3', required: true)
 
 cc = meson.get_compiler('cpp')
+lib_dir = meson.current_source_dir() / 'thirdparty/lib' / host_machine.system() / host_machine.cpu()
+inc_dir = 'thirdparty/include' / host_machine.system()
 
 global_cpp_defs = [
   '-DSPLIT_SAVES',
@@ -28,13 +30,21 @@ global_cpp_defs = [
   '-DDEBUG',
 ]
 
-if host_machine.system() == 'linux'
+if host_machine.system() == 'linux' or host_machine.system() == 'android'
   global_cpp_defs += ['-Dlinux', '-D__linux', '-D__linux__']
 endif
 
+if host_machine.system() == 'android'
+  global_cpp_defs += ['-D__android__']
+endif
+
 if get_option('renderer') == 'gles'
   global_cpp_defs += ['-DGLES']
-  gl_dep = dependency('glesv2', required: true)
+  if host_machine.system() == 'android'
+    gl_dep = cc.find_library('GLESv3', required: true )
+  else
+    gl_dep = dependency('glesv2', required: true)
+  endif
   glu_dep = dependency('', required: false)
 else
   gl_dep = dependency('gl', required: true)
@@ -69,10 +79,21 @@ global_cpp_args = [
 ]
 add_project_arguments(global_cpp_args, language: 'cpp')
 
-sdl2_dep = dependency('sdl2')
+if host_machine.system() == 'android'
+  sdl2_dep = declare_dependency(
+    dependencies: cc.find_library('SDL2', dirs: lib_dir, required: true ), 
+    include_directories: inc_dir)
+else
+  sdl2_dep = dependency('sdl2')
+endif
 thread_dep = dependency('threads')
 dl_dep = cc.find_library('dl', required: true)
-glm_dep = dependency('glm')
+
+if host_machine.system() == 'android'
+  glm_dep  = declare_dependency(include_directories: inc_dir)
+else
+  glm_dep = dependency('glm')
+endif
 
 stb = subproject('stb').get_variable('stb_inc')
 stb_dep = declare_dependency(include_directories: stb)

scripts/android.txt

@@ -0,0 +1,23 @@
+[constants]
+ndk_home = 'set_path_to_you_ndk'
+ndk_api = 'set_api_ndk'
+
+[properties]
+skip_sanity_check = true
+
+[binaries]
+c = ndk_home / 'toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android' + ndk_api + '-clang'
+cpp = ndk_home / 'toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android' + ndk_api + '-clang++'
+ar = ndk_home / 'toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-ar'
+strip = ndk_home / 'toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip'
+sys_root = ndk_home / 'toolchains/llvm/prebuilt/linux-x86_64/sysroot'
+as      = ndk_home / 'toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-as'
+ranlib  = ndk_home / 'toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-ranlib'
+ld      = ndk_home / 'toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-ld'
+pkg_config = 'false'
+
+[host_machine]
+system = 'android'
+cpu_family = 'arm'
+cpu = 'aarch64'
+endian = 'little'

targets/app/meson.build

@@ -29,7 +29,7 @@ platform_sources = run_command(
 ).stdout().strip().split('\n')
 
 # linux-specific files
-if host_machine.system() == 'linux'
+if host_machine.system() == 'linux' or host_machine.system() == 'android'
   platform_sources += run_command(
     'sh',
     '-c', 'find "'

targets/minecraft/meson.build

@@ -64,8 +64,16 @@ lib_minecraft = static_library('minecraft',
   cpp_args : global_cpp_args + global_cpp_defs,
 )
 
+_inc_dir = '../../' / inc_dir
+
 zlib_dep = dependency('zlib')
-crypto_dep = dependency('libcrypto')  # for MD5 in Hasher.cpp on Linux
+if host_machine.system() == 'android'
+  crypto_dep = declare_dependency(
+    dependencies: cc.find_library('crypto', dirs: lib_dir, required: true ),
+    include_directories: _inc_dir)
+else
+ crypto_dep = dependency('libcrypto')  # for MD5 in Hasher.cpp on Linux
+endif
 
 minecraft_dep = declare_dependency(
   link_with : lib_minecraft,

targets/platform/meson.build

@@ -1,4 +1,5 @@
 platform_inc = include_directories('.')
+_inc_dir = '../../' / inc_dir
 _threads = dependency('threads')
 
 lib_platform_core = static_library('platform_core',
@@ -14,16 +15,39 @@ platform_dep = declare_dependency(
 )
 
 # SDL2-based platform implementations (formerly 4J.* modules)
-_sdl2 = dependency('sdl2')
+if host_machine.system() == 'android'
+  _sdl2 = declare_dependency(
+  dependencies: cc.find_library('SDL2', dirs: lib_dir, required: true ), 
+  include_directories: _inc_dir)
+else
+  _sdl2 = dependency('sdl2')
+endif
 _defs = []
 
 if get_option('renderer') == 'gles'
-  _gl = dependency('glesv2', required: true)
+  if host_machine.system() == 'android'
+    _gl = cc.find_library('GLESv3', required: true )
+    _egl  = cc.find_library('EGL', required: true )
+  else
+    _gl = dependency('glesv2', required: true)
+  endif
   _defs += ['-DGLES']
 else
   _gl = dependency('gl', required: true)
 endif
 
+deps = [
+  _sdl2, 
+  _gl, 
+  _threads, 
+  glm_dep,
+  stb_dep,
+]
+
+if host_machine.system() == 'android'
+  deps += _egl
+endif
+
 sdl2_sources = files(
   'sdl2/Input.cpp',
   'sdl2/Profile.cpp',
@@ -35,7 +59,7 @@ sdl2_sources = files(
 lib_platform_sdl2 = static_library('platform_sdl2',
   sdl2_sources,
   include_directories: [platform_inc, include_directories('sdl2')],
-  dependencies: [_sdl2, _gl, _threads, glm_dep, stb_dep],
+  dependencies: deps,
   cpp_args: _defs + global_cpp_args + global_cpp_defs,
 )
 
@@ -44,7 +68,7 @@ lib_platform_sdl2 = static_library('platform_sdl2',
 render_dep = declare_dependency(
   link_with: lib_platform_sdl2,
   include_directories: [platform_inc, include_directories('sdl2')],
-  dependencies: [_sdl2, _gl, _threads, glm_dep],
+  dependencies: deps,
 )
 input_dep = render_dep
 profile_dep = render_dep