Update build for macos M1 (#77)

jni/android/build.gradle.kts

@@ -27,6 +27,7 @@ android {
 
     externalNativeBuild {
         cmake {
+            version = "3.22.1"
             path("src/main/CMakeLists.txt")
         }
     }

jni/jvm/darwin/build.gradle.kts

@@ -12,8 +12,12 @@ dependencies {
 val copyJni by tasks.creating(Sync::class) {
     onlyIf { org.gradle.internal.os.OperatingSystem.current().isMacOsX }
     dependsOn(":jni:jvm:buildNativeHost")
+    val arch = when (System.getProperty("os.arch")) {
+        "aarch64" -> "aarch64"
+        else -> "x86_64"
+    }
     from(rootDir.resolve("jni/jvm/build/darwin/libsecp256k1-jni.dylib"))
-    into(buildDir.resolve("jniResources/fr/acinq/secp256k1/jni/native/darwin-x86_64"))
+    into(buildDir.resolve("jniResources/fr/acinq/secp256k1/jni/native/darwin-$arch"))
 }
 
 (tasks["processResources"] as ProcessResources).apply {

native/build.sh

@@ -16,7 +16,7 @@ if [ "$TARGET" == "mingw" ]; then
 elif [ "$TARGET" == "linux" ]; then
   CONF_OPTS="CFLAGS=-fPIC"
 elif [ "$TARGET" == "darwin" ]; then
-  CONF_OPTS="--host=x86_64-w64-darwin"
+  CONF_OPTS=""
 else
   echo "Unknown TARGET=$TARGET"
   exit 1

publishing/PUBLISHING.md

@@ -27,7 +27,9 @@ You must edit `secp256k1-kmp-staging-upload.sh` and add your sonatype credential
 ## Adding custom JNI bindings
 
 Github CI currently generates JNI bindings for Windows x64, Linux x64 and iOS x64. But it is possible to add custom bindings to JNI packages before 
-they are published to maven central. This is how we add linux arm64 bindings:
+they are published to maven central. 
+
+This is how we add linux arm64 bindings:
 - compile JNI bindings for Linux Arm64 (on a Linux Arm64 machine, cross-compilation is not supported)
   - git clone --recursive https://github.com/ACINQ/secp256k1-kmp.git
   - cd secp256k1-kmp 
@@ -37,6 +39,19 @@ they are published to maven central. This is how we add linux arm64 bindings:
   - JNI library is: jni/jvm/build/linux/libsecp256k1-jni.so
 - copy libsecp256k1-jni.so to fr/acinq/secp256k1/jni/native/linux-aarch64/libsecp256k1-jni.so
 - run `secp256k1-kmp-add-linuxarm64.sh` and specify either `release` or `snapshot` and the `VERSION` environment variable, for example:
-  - VERSION=0.6.4-SNAPSHOT ./secp256k1-kmp-add-linuxarm64.sh snapshot
-  - VERSION=0.6.3 ./secp256k1-kmp-add-linuxarm64.sh release
+  - VERSION=0.9.0-SNAPSHOT ./secp256k1-kmp-add-linuxarm64.sh snapshot
+  - VERSION=0.9.0 ./secp256k1-kmp-add-linuxarm64.sh release
+
+This is how we add macos arm64 (M1/M2) bindings:
+- compile JNI bindings for macos Arm64 (on a macos Arm64 machine, cross-compilation is not supported)
+  - git clone --recursive https://github.com/ACINQ/secp256k1-kmp.git
+  - cd secp256k1-kmp
+  - TARGET=darwin ./native/build.sh
+  - mkdir -p jni/jvm/build/darwin
+  - TARGET=darwin ./jni/jvm/build.sh
+  - JNI library is: jni/jvm/build/darwin/libsecp256k1-jni.dylib
+- copy libsecp256k1-jni.dylib to fr/acinq/secp256k1/jni/native/darwin-aarch64/libsecp256k1-jni.dylib
+- run `secp256k1-kmp-add-darwinaarch64.sh` and specify either `release` or `snapshot` and the `VERSION` environment variable, for example:
+  - VERSION=0.9.0-SNAPSHOT ./secp256k1-kmp-add-darwinaarch64.sh snapshot
+  - VERSION=0.9.0 ./secp256k1-kmp-add-darwinaarch64.sh release
 

publishing/secp256k1-kmp-add-darwinaarch64.sh

@@ -0,0 +1,17 @@
+#!/bin/bash -x
+
+if [ $# -eq 0 ]
+  then
+    echo "specify either snapshot or release"
+    exit 1
+fi
+
+# add aarch64 (ARM64) library to the darwin jar
+if [ -e fr/acinq/secp256k1/jni/native/darwin-aarch64/libsecp256k1-jni.dylib ]
+then
+    jar -uf $1/fr/acinq/secp256k1/secp256k1-kmp-jni-jvm-darwin/$VERSION/secp256k1-kmp-jni-jvm-darwin-$VERSION.jar fr || exit
+else
+    libsecp256k1-jni.dylib for arch64 is missing
+    exit 1
+fi
+

publishing/secp256k1-kmp-snapshot-deploy.sh

@@ -2,7 +2,7 @@
 
 GROUP_ID=fr.acinq.secp256k1
 ARTIFACT_ID_BASE=secp256k1-kmp
-VERSION=0.6.3-SNAPSHOT
+VERSION=0.9.0-SNAPSHOT
 
 cd snapshot
 pushd .