Android implementation

native/build-android.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+set -e
+
+ANDROID_NDK=/Users/salomonbrys/Library/Android/sdk/ndk/21.3.6528147
+TOOLCHAIN=darwin-x86_64
+
+[[ -z "$ANDROID_NDK" ]] && echo "Please set the ANDROID_NDK variable" && exit 1
+[[ -z "$ARCH" ]] && echo "Please set the ARCH variable" && exit 1
+[[ -z "$TOOLCHAIN" ]] && echo "Please set the TOOLCHAIN variable" && exit 1
+
+if [ "$ARCH" == "x86_64" ]; then
+  SYS=x86_64
+elif [ "$ARCH" == "x86" ]; then
+  SYS=i686
+elif [ "$ARCH" == "arm64-v8a" ]; then
+  SYS=aarch64
+elif [ "$ARCH" == "armeabi-v7a" ]; then
+  SYS=armv7a
+else
+  echo "Unsupported ARCH: $ARCH"
+  exit 1
+fi
+
+TARGET=$SYS-linux-android
+TOOLTARGET=$TARGET
+if [ "$SYS" == "armv7a" ]; then
+  TARGET=armv7a-linux-androideabi
+  TOOLTARGET=arm-linux-androideabi
+fi
+
+export CC=$ANDROID_NDK/toolchains/llvm/prebuilt/$TOOLCHAIN/bin/${TARGET}21-clang
+export LD=$ANDROID_NDK/toolchains/llvm/prebuilt/$TOOLCHAIN/bin/$TOOLTARGET-ld
+export AR=$ANDROID_NDK/toolchains/llvm/prebuilt/$TOOLCHAIN/bin/$TOOLTARGET-ar
+export AS=$ANDROID_NDK/toolchains/llvm/prebuilt/$TOOLCHAIN/bin/$TOOLTARGET-as
+export RANLIB=$ANDROID_NDK/toolchains/llvm/prebuilt/$TOOLCHAIN/bin/$TOOLTARGET-ranlib
+export STRIP=$ANDROID_NDK/toolchains/llvm/prebuilt/$TOOLCHAIN/bin/$TOOLTARGET-strip
+
+cd secp256k1
+
+./autogen.sh
+./configure CFLAGS=-fpic --host=$TARGET --enable-experimental --enable-module_ecdh --enable-module-recovery --enable-benchmark=no --enable-shared=no --enable-exhaustive-tests=no --enable-tests=no
+make clean
+make
+
+cd ..
+
+mkdir -p build/android/$ARCH
+cp -v secp256k1/.libs/libsecp256k1.a build/android/$ARCH