Add linux arm64 target

.github/workflows/release.yml

@@ -110,7 +110,7 @@ jobs:
       - name: Publish Linux
         if: matrix.os == 'ubuntu-latest'
         shell: bash
-        run: ./gradlew publishAndroidPublicationToMavenLocal publishLinuxX64PublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal
+        run: ./gradlew publishAndroidPublicationToMavenLocal publishLinuxArm64PublicationToMavenLocal publishLinuxX64PublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal
       - name: Publish Windows
         if: matrix.os == 'windows-latest'
         shell: msys2 {0}

.github/workflows/snapshot.yml

@@ -31,6 +31,9 @@ jobs:
           echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
           sudo udevadm control --reload-rules
           sudo udevadm trigger --name-match=kvm
+      - name: Install cross compiler
+        if: matrix.os == 'ubuntu-latest'
+        run: sudo apt install g++-aarch64-linux-gnu binutils-aarch64-linux-gnu
       - name: Cached Konan
         uses: actions/cache@v4
         with:
@@ -119,7 +122,7 @@ jobs:
       - name: Publish Linux
         if: matrix.os == 'ubuntu-latest'
         shell: bash
-        run: ./gradlew publishAndroidPublicationToMavenLocal publishLinuxX64PublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
+        run: ./gradlew publishAndroidPublicationToMavenLocal publishLinuxArm64PublicationToMavenLocal publishLinuxX64PublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
       - name: Publish Windows
         if: matrix.os == 'windows-latest'
         shell: msys2 {0}

build.gradle.kts

@@ -23,7 +23,7 @@ buildscript {
 
 allprojects {
     group = "fr.acinq.secp256k1"
-    version = "0.17.1"
+    version = "0.17.2-SNAPSHOT"
 
     repositories {
         google()
@@ -59,6 +59,10 @@ kotlin {
         secp256k1CInterop("host")
     }
 
+    linuxArm64 {
+        secp256k1CInterop("linuxArm64")
+    }
+
     macosX64 {
         secp256k1CInterop("host")
     }
@@ -91,9 +95,9 @@ allprojects {
             val currentOs = OperatingSystem.current()
             val targets = when {
                 currentOs.isLinux -> listOf()
-                currentOs.isMacOsX -> listOf("linuxX64")
-                currentOs.isWindows -> listOf("linuxX64")
-                else -> listOf("linuxX64")
+                currentOs.isMacOsX -> listOf("linuxX64", "linuxArm64")
+                currentOs.isWindows -> listOf("linuxX64", "linuxArm64")
+                else -> listOf("linuxX64", "linuxArm64")
             }.mapNotNull { kotlin.targets.findByName(it) as? KotlinNativeTarget }
 
             configure(targets) {

native/build.gradle.kts

@@ -30,6 +30,21 @@ val buildSecp256k1Host by tasks.creating(Exec::class) {
     commandLine(bash, "-l", "build.sh")
 }
 
+// specific build task for linux arm64, which is cross-compiled on a linux x64 host
+val buildSecp256k1LinuxArm64 by tasks.creating(Exec::class) {
+    group = "build"
+    buildSecp256k1.dependsOn(this)
+
+    val target = "linuxArm64"
+
+    inputs.files(projectDir.resolve("build.sh"))
+    outputs.dir(projectDir.resolve("build/$target"))
+
+    workingDir = projectDir
+    environment("TARGET", target)
+    commandLine(bash, "-l", "build.sh")
+}
+
 val buildSecp256k1Ios by tasks.creating(Exec::class) {
     group = "build"
     buildSecp256k1.dependsOn(this)

native/build.sh

@@ -16,6 +16,9 @@ if [ "$TARGET" == "mingw" ]; then
   CONF_OPTS=" --host=x86_64-w64-mingw32"
 elif [ "$TARGET" == "linux" ]; then
   CFLAGS="-fPIC"
+elif [ "$TARGET" == "linuxArm64" ]; then
+  CFLAGS="-fPIC"
+  CONF_OPTS="--host=aarch64-linux-gnu"
 elif [ "$TARGET" == "darwin" ]; then
   CFLAGS="-arch arm64 -arch x86_64"
   LDFLAGS="-arch arm64 -arch x86_64"

publishing/secp256k1-kmp-snapshot-deploy.sh

@@ -21,7 +21,7 @@ mvn deploy:deploy-file -DrepositoryId=ossrh -Durl=https://oss.sonatype.org/conte
   -Djavadoc=$ARTIFACT_ID_BASE-$VERSION-javadoc.jar
 popd
 pushd .
-for i in iosarm64 iossimulatorarm64 iosx64 macosarm64 macosx64 jni-android jni-common jni-jvm-darwin jni-jvm-extract jni-jvm-linux jni-jvm-mingw jni-jvm jvm linuxx64; do
+for i in iosarm64 iossimulatorarm64 iosx64 macosarm64 macosx64 jni-android jni-common jni-jvm-darwin jni-jvm-extract jni-jvm-linux jni-jvm-mingw jni-jvm jvm linuxarm64 linuxx64; do
   cd fr/acinq/secp256k1/secp256k1-kmp-$i/$VERSION
 
   case $i in
@@ -35,7 +35,7 @@ for i in iosarm64 iossimulatorarm64 iosx64 macosarm64 macosx64 jni-android jni-c
             -Dsources=$ARTIFACT_ID_BASE-$i-$VERSION-sources.jar \
             -Djavadoc=$ARTIFACT_ID_BASE-$i-$VERSION-javadoc.jar
           ;;
-    linuxx64)
+    linuxx64 | linuxarm64)
       mvn deploy:deploy-file -DrepositoryId=ossrh -Durl=https://oss.sonatype.org/content/repositories/snapshots/ \
         -DpomFile=$ARTIFACT_ID_BASE-$i-$VERSION.pom \
         -Dfile=$ARTIFACT_ID_BASE-$i-$VERSION.klib \

publishing/secp256k1-kmp-staging-upload.sh

@@ -28,7 +28,10 @@ for i in 	secp256k1-kmp \
 		secp256k1-kmp-jni-jvm-linux \
 		secp256k1-kmp-jni-jvm-mingw \
 		secp256k1-kmp-jvm \
-		secp256k1-kmp-linuxx64
+		secp256k1-kmp-linuxarm64 \
+		secp256k1-kmp-linuxx64 \
+		secp256k1-kmp-macosarm64 \
+		secp256k1-kmp-macosx64
 do
 	pushd .
 	cd release/fr/acinq/secp256k1/$i/$VERSION

src/nativeInterop/cinterop/libsecp256k1.def

@@ -3,9 +3,13 @@ package = secp256k1
 headers = secp256k1.h secp256k1_ecdh.h secp256k1_recovery.h secp256k1_extrakeys.h secp256k1_schnorrsig.h secp256k1_musig.h
 headerFilter = secp256k1/** secp256k1_ecdh.h secp256k1_recovery.h secp256k1_extrakeys.h secp256k1_schnorrsig.h secp256k1_musig.h secp256k1.h
 
-staticLibraries.linux = libsecp256k1.a
-libraryPaths.linux = c/secp256k1/build/linux/ native/build/linux/ native/build/darwin/
-linkerOpts.linux = -L/usr/lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/local/lib
+staticLibraries.linux_x64 = libsecp256k1.a
+libraryPaths.linux_x64 = c/secp256k1/build/linux/ native/build/linux/
+linkerOpts.linux_x64 = -L/usr/lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/local/lib
+
+staticLibraries.linux_arm64 = libsecp256k1.a
+libraryPaths.linux_arm64 = c/secp256k1/build/linuxArm65/ native/build/linuxArm64/
+linkerOpts.linux_arm64 = -L/usr/aarch64-linux-gnu/lib
 
 staticLibraries.macos_x64 = libsecp256k1.a
 libraryPaths.macos_x64 = c/secp256k1/build/darwin/ native/build/darwin/