Support linux/arm64 targets.

gradle.properties

@@ -21,8 +21,9 @@ remoteRoot=konan_tests
 kotlinCompilerRepo=https://teamcity.jetbrains.com/guestAuth/app/rest/builds/buildType:(id:Kotlin_dev_Compiler),number:1.3.40-dev-2068,branch:default:true,pinned:true/artifacts/content/maven
 kotlinVersion=1.3.40-dev-2068
 testKotlinVersion=1.3.40-dev-2068
-sharedRepo=https://teamcity.jetbrains.com/guestAuth/app/rest/builds/buildType:(id:Kotlin_KotlinNativeShared_BuildAndTest),number:1.0-dev-28,branch:default:true,pinned:true/artifacts/content/maven
-sharedVersion=1.0-dev-28
+# See https://teamcity.jetbrains.com/project.html?projectId=Kotlin_KotlinNativeShared&tab=projectOverview
+sharedRepo=https://teamcity.jetbrains.com/guestAuth/app/rest/builds/buildType:(id:Kotlin_KotlinNativeShared_BuildAndTest),number:1.0-dev-46,branch:default:true,pinned:true/artifacts/content/maven
+sharedVersion=1.0-dev-46
 konanVersion=1.3.0
 org.gradle.jvmargs='-Dfile.encoding=UTF-8'
 org.gradle.workers.max=4

konan/konan.properties

@@ -224,6 +224,48 @@ abiSpecificLibraries.linux_arm32_hfp = \
     lib/arm-linux-gnueabihf \
     usr/lib/arm-linux-gnueabihf
 
+# Linux arm64
+targetToolchain.linux_x64-linux_arm64 = target-gcc-toolchain-3-linux-x86-64/x86_64-unknown-linux-gnu
+targetToolchain.mingw_x64-linux_arm64 = msys2-mingw-w64-x86_64-gcc-7.3.0-clang-llvm-lld-6.0.1
+targetToolchain.macos_x64-linux_arm64 = clang-llvm-6.0.1-darwin-macos
+dependencies.linux_x64-linux_arm64 = \
+    clang-llvm-6.0.1-linux-x86-64 \
+    target-gcc-toolchain-3-linux-x86-64 \
+    target-sysroot-1-linux-glibc-arm64 \
+    libffi-3.2.1-2-linux-x86-64
+dependencies.mingw_x64-linux_arm64 = \
+    msys2-mingw-w64-x86_64-gcc-7.3.0-clang-llvm-lld-6.0.1 \
+    libffi-3.2.1-mingw-w64-x86-64 \
+    target-gcc-toolchain-3-linux-x86-64 \
+    target-sysroot-1-linux-glibc-arm64
+dependencies.macos_x64-linux_arm64 = \
+    clang-llvm-6.0.1-darwin-macos \
+    libffi-3.2.1-3-darwin-macos \
+    target-gcc-toolchain-3-linux-x86-64 \
+    target-sysroot-1-linux-glibc-arm64
+
+quadruple.linux_arm64 = aarch64-unknown-linux-gnu
+entrySelector.linux_arm64 = --defsym main=Konan_main
+linkerNoDebugFlags.linux_arm64 = -S
+linkerDynamicFlags.linux_arm64 = -shared
+linkerOptimizationFlags.linux_arm64 = --gc-sections
+# From https://releases.linaro.org/components/toolchain/binaries/latest-7/aarch64-linux-gnu/.
+targetSysRoot.linux_arm64 = target-sysroot-1-linux-glibc-arm64
+# We could reuse host toolchain here.
+linkerKonanFlags.linux_arm64 = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread \
+  --defsym __cxa_demangle=Konan_cxa_demangle
+# targetSysroot-relative.
+libGcc.linux_arm64 = usr/lib
+llvmLtoFlags.linux_arm64 = -mcpu=cortex-a57
+llvmLtoOptFlags.linux_arm64 = -O3 -function-sections
+llvmLtoNooptFlags.linux_arm64 = -O1
+llvmLtoDynamicFlags.linux_arm64 = -relocation-model=pic
+dynamicLinker.linux_arm64 = /lib/ld-linux-aarch64.so.1
+# targetSysRoot relative
+abiSpecificLibraries.linux_arm64 = \
+    lib \
+    usr/lib
+
 # MIPS
 targetToolchain.linux_x64-linux_mips32 = target-gcc-toolchain-2-linux-mips/x86_64-unknown-linux-gnu
 dependencies.linux_x64-linux_mips32 = \