编译 建议使用容器编译，否则建议 clone 进 GOPATH 里
clone 1 2 git clone https://github.com/hashicorp/consul.git cd consul
线上使用的是 v1.8 版本，这里我以 v1.8.14 (2021/07/19 发布的)搞的。
准备工作 拉取需要的镜像。貌似 golang 1.16 更好的支持 mips64 了，所以条件允许的话，这里可以下改下 golang 的版本试试
1 2 3 4 $ head -n2 build-support/docker/Build-Go.dockerfile ARG GOLANG_VERSION=1.14.11 FROM golang:${GOLANG_VERSION} $ docker pull golang:1.14.11
开始编译 相关变量可以查看 GNUmakefile ，实际会在容器里运行 build-support/functions/20-build.sh 里的 function build_consul ：
1 2 3 4 5 6 7 local container_id=$(docker create -it \ ${volume_mount} \ -e CGO_ENABLED=0 \ -e GOLDFLAGS="${GOLDFLAGS}" \ -e GOTAGS="${GOTAGS}" \ ${image_name} \ ./build-support/scripts/build-local.sh -o "${XC_OS}" -a "${XC_ARCH}")
而在容器里执行build-support/scripts/build-local.sh -o "${XC_OS}" -a "${XC_ARCH}" 会执行 build-support/functions/20-build.sh 里的 function build_consul_local，主要编译是下面的这行：
1 debug_run env CGO_ENABLED=0 GOOS=${os} GOARCH=${arch} go install -ldflags "${GOLDFLAGS}" -tags "${GOTAGS}" && cp "${MAIN_GOPATH}/bin/${GOBIN_EXTRA}${binname}" "${outdir}/${binname}"
开始编译
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 export DOCKER_BUILD_QUIET=0 export XC_OS=linux XC_ARCH=mips64le make consul-docker ==> Building Consul - OSes: linux, Architectures: mips64le Building sequentially with go install ---> linux/mips64le # github.com/boltdb/bolt /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/bolt_unix.go:62:15: undefined: maxMapSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/bucket.go:135:15: undefined: brokenUnaligned /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/db.go:101:13: undefined: maxMapSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/db.go:317:12: undefined: maxMapSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/db.go:335:10: undefined: maxMapSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/db.go:336:8: undefined: maxMapSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/freelist.go:169:19: undefined: maxAllocSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/freelist.go:176:14: undefined: maxAllocSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/freelist.go:204:17: undefined: maxAllocSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/freelist.go:207:7: undefined: maxAllocSize /go/pkg/mod/github.com/boltdb/bolt@v1.3.1/freelist.go:207:7: too many errors ERROR: Failed to build Consul for linux/mips64le make: *** [consul-docker] Error 1
编译报错，是因为 boltdb 的库现在 archive 了。而且相关文件用 golang 的 build tag 区分架构了，没有预置 mips64le 的，搜了几个 issue 后搞了下编译还是失败了，仔细看上面的 path，没有读取 vendor 目录，得改编译容器里的 mod 目录下的 boltdb 文件。所以得 hack 下。
hack 先产生临时文件/tmp/hack_consul.sh
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 cat > /tmp/hack_consul.sh << 'consul_eof' if [ $arch == "mips64le" ];then cat > $(go env GOPATH)/pkg/mod/github.com/boltdb/bolt@v1.3.1/bolt_mips64x.go <<'EOF' // +build mips64 mips64le package bolt // maxMapSize represents the largest mmap size supported by Bolt. const maxMapSize = 0x8000000000 // 512GB // maxAllocSize is the size used when creating array pointers. const maxAllocSize = 0x7FFFFFFF // Are unaligned load/stores broken on this arch ? var brokenUnaligned = false EOF cat > $(go env GOPATH)/pkg/mod/github.com/boltdb/bolt@v1.3.1/bolt_mips.go <<'EOF' // +build mips mipsle package bolt // maxMapSize represents the largest mmap size supported by Bolt. const maxMapSize = 0x40000000 // 1GB // maxAllocSize is the size used when creating array pointers. const maxAllocSize = 0xFFFFFFF // Are unaligned load/stores broken on this arch ? var brokenUnaligned = false EOF fi consul_eof
取 go install 命令的行数，在前面一行插入 hack 的脚本
1 2 3 4 5 CONSUL_HACK_NUM=$(grep -Pn 'debug_run.+?go install' build-support/functions/20-build.sh | cut -d: -f 1) sed -i "$[CONSUL_HACK_NUM-1]r /tmp/hack_consul.sh" build-support/functions/20-build.sh
继续编译 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 $ make consul-docker Building Golang build container Sending build context to Docker daemon 2.048kB Step 1/5 : ARG GOLANG_VERSION=1.14.11 Step 2/5 : FROM golang:${GOLANG_VERSION} ---> f93db70cba35 Step 3/5 : ARG GOTOOLS="github.com/elazarl/go-bindata-assetfs/... github.com/hashicorp/go-bindata/... golang.org/x/tools/cmd/cover golang.org/x/tools/cmd/stringer github.com/axw/gocov/gocov gopkg.in/matm/v1/gocov-html" ---> Using cache ---> e0979c09e72f Step 4/5 : RUN GO111MODULE=on go get -v ${GOTOOLS} && mkdir -p /consul ---> Using cache ---> 9cb7abf49b86 Step 5/5 : WORKDIR /consul ---> Using cache ---> fb1467e4623c Successfully built fb1467e4623c Successfully tagged consul-build-go:latest ==> Building Consul Ensuring Go modules are up to date Creating the Go Build Container with image: consul-build-go Copying the source from '/root/go/src/github.com/hashicorp/consul' to /consul Running build in container ==> Building Consul - OSes: linux, Architectures: mips64le Building sequentially with go install ---> linux/mips64le Copying back artifacts $ ls -l pkg/bin/linux_mips64le/ total 112192 -rwxr-xr-x 1 root root 114881061 Jul 16 12:34 consul
测试 拷贝到龙芯机器上测试下可否运行
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 $ lscpu Architecture: mips64el Byte Order: Little Endian CPU(s): 8 On-line CPU(s) list: 0-7 Thread(s) per core: 1 Core(s) per socket: 4 座： 2 NUMA 节点： 2 型号名称： Loongson-3A R4 (Loongson-3B4000) CPU max MHz: 1800.0000 CPU min MHz: 900.0000 BogoMIPS： 3594.02 L1d 缓存： 64K L1i 缓存： 64K L2 缓存： 256K L3 缓存： 2048K NUMA 节点0 CPU： 0-3 NUMA 节点1 CPU： 4-7 $ /tmp/consul --version Consul v1.8.14 Revision 94c1bdd3b+CHANGES Protocol 2 spoken by default, understands 2 to 3 (agent will automatically use protocol >2 when speaking to compatible agents)
参考
