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# SPDX-License-Identifier: Apache-2.0
#
# Copyright © 2017-2023 WireGuard LLC. All Rights Reserved.
BUILDDIR ?= $(CURDIR)/build
DESTDIR ?= $(CURDIR)/out
NDK_GO_ARCH_MAP_x86 := 386
NDK_GO_ARCH_MAP_x86_64 := amd64
NDK_GO_ARCH_MAP_arm := arm
NDK_GO_ARCH_MAP_arm64 := arm64
NDK_GO_ARCH_MAP_mips := mipsx
NDK_GO_ARCH_MAP_mips64 := mips64x
comma := ,
CLANG_FLAGS := --target=$(TARGET) --sysroot=$(SYSROOT)
export CGO_CFLAGS := $(CLANG_FLAGS) $(subst -mthumb,-marm,$(CFLAGS))
export CGO_LDFLAGS := $(CLANG_FLAGS) $(patsubst -Wl$(comma)--build-id=%,-Wl$(comma)--build-id=none,$(LDFLAGS)) -Wl,-soname=libwg-go.so
export GOARCH := $(NDK_GO_ARCH_MAP_$(ANDROID_ARCH_NAME))
export GOOS := android
export CGO_ENABLED := 1
GO_VERSION := 1.21.3
GO_PLATFORM := $(shell uname -s | tr '[:upper:]' '[:lower:]')-$(NDK_GO_ARCH_MAP_$(shell uname -m))
GO_TARBALL := go$(GO_VERSION).$(GO_PLATFORM).tar.gz
GO_HASH_darwin-amd64 := 27014fc69e301d7588a169ca239b3cc609f0aa1abf38528bf0d20d3b259211eb
GO_HASH_darwin-arm64 := 65302a7a9f7a4834932b3a7a14cb8be51beddda757b567a2f9e0cbd0d7b5a6ab
GO_HASH_linux-amd64 := 1241381b2843fae5a9707eec1f8fb2ef94d827990582c7c7c32f5bdfbfd420c8
default: $(DESTDIR)/libwg-go.so
$(GRADLE_USER_HOME)/caches/golang/$(GO_TARBALL):
mkdir -p "$(dir $@)"
flock "$@.lock" -c ' \
[ -f "$@" ] && exit 0; \
curl -o "$@.tmp" "https://dl.google.com/go/$(GO_TARBALL)" && \
echo "$(GO_HASH_$(GO_PLATFORM)) $@.tmp" | sha256sum -c && \
mv "$@.tmp" "$@"'
$(BUILDDIR)/go-$(GO_VERSION)/.prepared: $(GRADLE_USER_HOME)/caches/golang/$(GO_TARBALL)
mkdir -p "$(dir $@)"
flock "$@.lock" -c ' \
[ -f "$@" ] && exit 0; \
tar -C "$(dir $@)" --strip-components=1 -xzf "$^" && \
patch -p1 -f -N -r- -d "$(dir $@)" < goruntime-boottime-over-monotonic.diff && \
touch "$@"'
$(DESTDIR)/libwg-go.so: export PATH := $(BUILDDIR)/go-$(GO_VERSION)/bin/:$(PATH)
$(DESTDIR)/libwg-go.so: $(BUILDDIR)/go-$(GO_VERSION)/.prepared go.mod
go build -tags linux -ldflags="-X golang.zx2c4.com/wireguard/ipc.socketDirectory=/data/data/$(ANDROID_PACKAGE_NAME)/cache/wireguard -buildid=" -v -trimpath -buildvcs=false -o "$@" -buildmode c-shared
.DELETE_ON_ERROR:
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