Add support for building android-arm64

The Android support was limited to x64 in the build files. This
adds arm64 support.

Note that build/pre_build.py argument --android has been replaced
with two arguments:
   --androidx64
   --androidarm64

Author: jcortell68

build/cmake_modules/common.cmake

@@ -57,10 +57,16 @@ if(NOT WIN32)
         set(CMAKE_C_COMPILER gcc)
         set(CMAKE_CXX_COMPILER g++)
     endif()
+endif()
 
 if(NOT APPLE)
     set(GPA_COMMON_LINK_ARCHIVE_FLAG -Wl,--whole-archive)
     set(GPA_COMMON_LINK_NO_ARCHIVE_FLAG -Wl,--no-whole-archive)
 endif()
-    add_compile_options(-Wno-unknown-pragmas -Wno-strict-aliasing -Wno-non-virtual-dtor -Wno-unused-value -msse -fvisibility=hidden)
+
+add_compile_options(-Wno-unknown-pragmas -Wno-strict-aliasing -Wno-non-virtual-dtor -Wno-unused-value -fvisibility=hidden)
+
+# Don't add -msse if building for Android ARM. Arg is not relevant for ARM and -Werror,-Wunused-command-line-argument makes that an error
+if(NOT ((ANDROID) AND (ANDROID_ABI STREQUAL "arm64-v8a")))
+    add_compile_options(-msse)
 endif()

build/pre_build.py

@@ -33,8 +33,10 @@ def pre_build(build_args):
 
     build_dir_name = "cmake_bld"
 
-    if build_args.android == True:
-        build_dir_name = "cmake_bld_android"
+    if build_args.androidx64 == True:
+        build_dir_name = "cmake_bld_android_x64"
+    elif build_args.androidarm64 == True:
+        build_dir_name = "cmake_bld_android_arm64"
 
     cmake_additional_args = PreBuildCMakeCommon.parse_cmake_arguments(build_args)
 
@@ -43,14 +45,13 @@ def pre_build(build_args):
     else:
         cmake_additional_args.append("-Dbuild=0")
 
-    if build_args.android == True:
+    if build_args.androidx64 == True or build_args.androidarm64 == True:
         PreBuildCMakeCommon.cmake_generator_platforms.remove('x86')
         android_ndk=os.environ["ANDROID_NDK"]
         if android_ndk == "":
             print("Android environment variable is not defined. Exiting.")
             exit(1)
         cmake_additional_args.append("-DBUILD_ANDROID=ON")
-        cmake_additional_args.append("-DANDROID_ABI=x86_64")
         cmake_additional_args.append("-DANDROID_PLATFORM=24")
         cmake_additional_args.append("-DANDROID_NATIVE_API_LEVEL=24")
         cmake_additional_args.append("-DANDROID_STL=c++_static")
@@ -59,6 +60,11 @@ def pre_build(build_args):
         cmake_additional_args.append("-Dskiptests=ON")
         cmake_additional_args.append("-Dbuild-32bit=OFF")
 
+    if build_args.androidx64 == True:
+        cmake_additional_args.append("-DANDROID_ABI=x86_64")
+    elif build_args.androidarm64 == True:
+        cmake_additional_args.append("-DANDROID_ABI=arm64-v8a")
+
     print(PreBuildCMakeCommon.cmake_generator)
     if sys.platform == "win32":
         for platform in PreBuildCMakeCommon.cmake_generator_platforms: