在mips平台编译bazel源码

在mips平台编译bazel源码

描述：在mips上使用tensorflow，面临必须编译源码，编译之前不得不编译tensorflow依赖的编译器bazel.本人试过cmake编译bazel(但由于最终会用docker编译，无疑这方法行不通)，无赖之下只能执行 compile.sh文件进行编译，期间各种水坑，在探索编译了10天后，终于编译成功，记录此博客，方便更多只能使用源码编译的同路人。

本人的环境：

[xzy@localhost test]$ uname -aLinux localhost.localdomain 3.10.84-11.fc21.loongson.mips64el

#1 SMP PREEMPT Mon Dec 5 13:54:03 CST 2016 mips64 mips64 mips64 GNU/Linux

• 编译protoc

具体可以参看src/README.md文件To build protobuf from source, the following tools are needed:

* autoconf

* automake

* libtool

* curl (used to download gmock)

* make

* g++

* unzip

注意：非最新版本的protocbuf在执行autogen.sh可能会出现上不了google下载不了gmock，将本文件的curl处的修改如下即可

-  curl $curlopts -O https://googlemock.googlecode.com/files/gmock-1.7.0.zip
+  curl $curlopts  -L -o gmock-1.7.0.zip https://github.com/peter-wangxu/gMock/archive/1.7.0.zip

$git clone https://github.com/google/protobuf.git

$ ./autogen.sh

$ ./configure

$ make

$ make check

$ sudo make install

$ sudo ldconfig # refresh shared library cache.

• 下载源码

说明：如果你要源码编译bazel，不要使用git clone https://github.com/bazelbuild/bazel.git. 克隆的文件里少了protocbuf相关的文件，会报GRPC_JAVA_PLUGIN  PROC找不到的错误，编译GRPC_JAVA_PLUGIN 始终编译不过，浪费许多时间。最后问了[email protected] 才了解这个坑，一定一定一定要下载xxx-dist.zip包

$wget https://github.com/bazelbuild/bazel/releases/download/0.5.0/bazel-0.5.0-dist.zip

$mkdir bazel-0.5.0

$cp bazel-0.5.0-dist.zip

$cd bazel-0.5.0

$unzip bazel-0.5.0-dist.zip

• 开始编译

说明：由于篇幅原因，部分文件看本人的github链接

1. 设置环境变量，尤其是JAVA_HOME、PROTOC、GCC、TMPDIR(可以自定义)、JAVA_OPTS(大小自己调整)
2. 加入mips64架构支持，具体的patch参看本人githubbuild-bazel-build.patch
   
3. 执行bash -x compile.sh 进行编译
4. 出错的话，可以参看本人github bazel-build.log
5. 成功编译的终端输出可以参看本人github bazel-build-successful-output.txt

export PROTOC=/usr/local/bin/protoc

export JAVA_HOME="/opt/j2sdk-image"

export JRE_HOME=${JAVA_HOME}/jre

export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib

export PATH=${JAVA_HOME}/bin:/usr/local/bin/:$PATH

export JAVA_OPTS="-server -Xms2048m -Xmx2048m"

export TMPDIR=/home/xzy/bazel_tmp_output

• 验证

说明：出现build successful 字样，就说明编译成功。进一步，会在output下生成一个bazel二进制文件，可以执行output/bazel version验证

[root@localhost output]# ./bazel version

Extracting Bazel installation...

............................................

Build label: 0.5.0-2017-06-01 (@2e9fff0)

Build target: bazel-out/local-opt/bin/src/main/java/com/google/devtools/build/lib/bazel/BazelServer_deploy.jar

Build time: 星期四 六月 1 01:57:44 2017 (1496282264)

Build timestamp: 1496282264

Build timestamp as int: 1496282264

• 参考文献

https://svnweb.freebsd.org/ports/head/devel/bazel/files/patch-scripts_bootstrap_bootstrap.sh?revision=436446&view=markup

https://github.com/bazelbuild/bazel/issues/1955#issuecomment-305157094

https://github.com/bazelbuild/bazel/issues/3068

https://github.com/bazelbuild/bazel/issues/3017

https://github.com/bazelbuild/bazel/issues/1955

https://github.com/bazelbuild/bazel