Build Bazel(0.29.0) on Raspberry Pi 4

Bazel 0.26.0, 0.29.0のbuildです。

1．準備

sudo apt install openjdk-8-jdk

jdk は下記では８がサポート対象となっている
8にしないとエラーが発生する。このような対応不能なエラーが発生した。
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (g1ConcurrentMark.cpp:1666), pid=5210, tid=5234
#  fatal error: Overflow during reference processing, can not continue. Please increase MarkStackSizeMax (current value: 2097152) and restart.
#
# JRE version: OpenJDK Runtime Environment (11.0.3+7) (build 11.0.3+7-post-Raspbian-5)

https://docs.bazel.build/versions/master/install-compile-source.html

もし違う場合には、確認して変更またはインストールする
下の例は0だったので、2に変更した後に、再度確認した画面

sudo update-alternatives --config javac

There are 2 choices for the alternative javac (providing /usr/bin/javac).

  Selection    Path                                          Priority   Status

------------------------------------------------------------

  0            /usr/lib/jvm/java-11-openjdk-armhf/bin/javac   1111      auto mode

  1            /usr/lib/jvm/java-11-openjdk-armhf/bin/javac   1111      manual mode

* 2            /usr/lib/jvm/java-8-openjdk-armhf/bin/javac    1081      manual mode

Press <enter> to keep the current choice[*], or type selection number:

2. ソースのダウンロード

mkdir ~/prj/bazel;cd ~/prj/bazel
$ wget https://github.com/bazelbuild/bazel/releases/download/0.29.0/bazel-0.29.1-dist.zip
$ unzip bazel-0.29.0-dist.zip

3. build前の設定と変更

環境変数追加
$ EXTRA_BAZEL_ARGS="--host_javabase=@local_jdk//:jdk"

2つのファイルを変更
compile.sh
before
bazel_build "src:bazel_nojdk${EXE_EXT}" \
  --action_env=PATH \
  --host_platform=@bazel_tools//platforms:host_platform \
  --platforms=@bazel_tools//platforms:target_platform \
  || fail "Could not build Bazel"

after
bazel_build "src:bazel_nojdk${EXE_EXT}" \
  --host_javabase=@local_jdk//:jdk \
  --action_env=PATH \
  --host_platform=@bazel_tools//platforms:host_platform \
  --platforms=@bazel_tools//platforms:target_platform \
  || fail "Could not build Bazel"

scripts/bootstrap/compile.sh
before
  run "${JAVAC}" -classpath "${classpath}" -sourcepath "${sourcepath}" \
      -d "${output}/classes" -source "$JAVA_VERSION" -target "$JAVA_VERSION" \
      -encoding UTF-8 ${BAZEL_JAVAC_OPTS} "@${paramfile}"

after
  run "${JAVAC}" -classpath "${classpath}" -sourcepath "${sourcepath}" \
      -d "${output}/classes" -source "$JAVA_VERSION" -target "$JAVA_VERSION" \
      -encoding UTF-8 ${BAZEL_JAVAC_OPTS} "@${paramfile}" -J-Xmx1024M

で、Go!!!
time comple.sh

この文字列が出ればOK
Build successful! Binary is here: /home/pi/tmp/output/bazel

次にコピーして完了
sudo cp output/bazel /usr/local/bin

ｔころで、こんなエラーがでた。
これは、上記の一番目の変更をしなかったから。。。
ERROR: /tmp/bazel_SwJ5aUhR/out/external/bazel_tools/tools/jdk/BUILD:492:14: Configurable attribute "actual" doesn't match this configuration: Could not find a JDK for host execution environment, please explicitly provide one using `--host_javabase.`

Peace!!