Building bazel from source on IBM power8

问题

I have access to a large IBM Power8 machine (running Ubuntu), and would like to build Bazel on it. However, when I try to do it as their installation instructions suggest, I get:

me@machine:~/bazel-0.1.5$ ./compile.sh
INFO: You can skip this first step by providing a path to the bazel binary as second argument:
INFO:    ./compile.sh compile /path/to/bazel
🍃  Building Bazel from scratch.
Compiling Java stubs for protocol buffers...
third_party/protobuf/protoc-linux-x86_32.exe -Isrc/main/protobuf/ --java_out=/tmp/bazel.T9C83cNa/src src/main/protobuf/android_studio_ide_info.proto
scripts/bootstrap/buildenv.sh: line 63: third_party/protobuf/protoc-linux-x86_32.exe: cannot execute binary file: Exec format error
pv@sardonis:~/bazel-0.1.5$ ^C

Clearly, part of the problem is the compiler trying the 32-bit compiler. I tried the following things to no avail.

• Replacing the third_party/protobuf/protoc-linux-x86_32.exe by a copy of third_party/protobuf/protoc-linux-x86_64.exe. This gave the same error.
• Replacing third_party/protobuf/protoc-linux-x86_32.exe by a symbolic link to /usr/local/bin/protoc, which came with my distribution (this is version libprotoc 3.0.0 according to protoc --version). However, this gave a large amount of errors: http://pastebin.com/HN0MQiC4
• Following the instructions on http://www.cnblogs.com/rodenpark/p/5007744.html to compile Protobuf from source and then building Bazel with the modifications on http://www.cnblogs.com/rodenpark/p/5007846.html but this resulted in a similar large amount of errors: http://pastebin.com/KjkseaGx for reference.

So, I'm out of inspiration. How can I compile Bazel on the IBM Power8 machines?

(PS: I've posted this as a part of resolving installing TensorFlow on the IBM power8, so it's not a duplicate question, just one aspect in order to solve it stepwise.)

回答1:

The version of protobuf you're using must match the protobuf runtime that is checked in. In this case, that's protobuf-java-3.0.0-beta-1.jar [1], so you have to use the compiler version 3.0.0-beta-1.

(I work on Bazel.)

[1] https://github.com/bazelbuild/bazel/tree/master/third_party/protobuf

来源：https://stackoverflow.com/questions/35381648/building-bazel-from-source-on-ibm-power8