Add support for linux arm64 target (ACINQ#157)

The binary must be built **on x86** with:
```
./gradlew linuxArm64DistZip
```

Fixes ACINQ#137.

---------

Co-Authored-By: pm47 <[email protected]>

Author: 2 people

README.md

@@ -6,7 +6,7 @@
 # phoenixd
 
 **phoenixd** is the server equivalent of the popular [phoenix wallet](https://github.com/ACINQ/phoenix) for mobile.
-It is written in [Kotlin Multiplatform](https://kotlinlang.org/docs/multiplatform.html) and runs natively on Linux, MacOS (x86 and ARM), and Windows (WSL).
+It is written in [Kotlin Multiplatform](https://kotlinlang.org/docs/multiplatform.html) and runs natively on Linux (x86 and ARM), MacOS (x86 and ARM), and Windows (WSL).
 
 ## Build
 
@@ -20,6 +20,12 @@ It is written in [Kotlin Multiplatform](https://kotlinlang.org/docs/multiplatfor
 ./gradlew linuxX64DistZip
 ```
 
+### Native Linux arm64
+
+```shell
+./gradlew linuxArm64DistZip
+```
+
 ### Native MacOS x64
 ```shell
 ./gradlew macosX64DistZip

build.gradle.kts

@@ -1,7 +1,7 @@
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat
 import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
-import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTargetWithHostTests
+import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
 import org.jetbrains.kotlin.gradle.targets.native.tasks.KotlinNativeTest
 import java.io.ByteArrayOutputStream
 
@@ -75,7 +75,7 @@ kotlin {
         }
     }
 
-    fun KotlinNativeTargetWithHostTests.phoenixBinaries() {
+    fun KotlinNativeTarget.phoenixBinaries() {
         binaries {
             executable("phoenixd") {
                 entryPoint = "fr.acinq.phoenixd.main"
@@ -99,6 +99,14 @@ kotlin {
             }
             phoenixBinaries()
         }
+        linuxArm64 {
+            compilations["main"].cinterops.create("sqlite") {
+                // use sqlite3 amalgamation on linux tests to prevent linking issues on new linux distros with dependency libraries which are to recent (for example glibc)
+                // see: https://github.com/touchlab/SQLiter/pull/38#issuecomment-867171789
+                definitionFile.set(File("$rootDir/src/nativeInterop/cinterop/sqlite3.def"))
+            }
+            phoenixBinaries()
+        }
     }
 
     if (currentOs.isMacOsX) {
@@ -191,6 +199,9 @@ distributions {
         create("linuxX64") {
             configureNativeDistribution("linuxX64Binaries", "linuxX64", "linux-x64")
         }
+        create("linuxArm64") {
+            configureNativeDistribution("linuxArm64Binaries", "linuxArm64", "linux-arm64")
+        }
     }
     if (currentOs.isMacOsX) {
         create("macosX64") {

gradle.properties

@@ -9,4 +9,5 @@ kotlin.incremental.multiplatform=true
 kotlin.mpp.stability.nowarn=true
 kotlin.mpp.enableCInteropCommonization=true
 kotlin.native.ignoreDisabledTargets=true
-kotlin.native.cacheKind.linuxX64=none
+kotlin.native.cacheKind.linuxX64=none
+kotlin.native.cacheKind.linuxArm64=none

settings.gradle.kts

@@ -1,7 +1,6 @@
 pluginManagement {
     repositories {
         gradlePluginPortal()
-        maven("https://dl.bintray.com/kotlin/kotlin-eap")
     }
 }