bazel-3.3.0 fails to bootstrap on ppc64le

[ceseo]

Description of the problem / feature request:

While bootstrapping bazel-3.3.0 on ppc64le:

In file included from src/main/java/com/google/devtools/build/lib/syntax/cpu_profiler_posix.cc:20:0:
bazel-out/ppc-opt/bin/external/bazel_tools/tools/jdk/include/jni.h:45:10: fatal error: jni_md.h: No such file or directory
 #include "jni_md.h"
          ^~~~~~~~~~
compilation terminated.
Target //src:bazel_nojdk failed to build
INFO: Elapsed time: 173.915s, Critical Path: 19.09s
INFO: 735 processes: 735 local.
FAILED: Build did NOT complete successfully

This is probably because jni_md.h is in jdk/include/linux, not jdk/include. Looking at the JDK installation path on Ubuntu 18.04:

ubuntu@horus:~$ sudo find / -name jni_md.h
/usr/lib/jvm/java-8-openjdk-ppc64el/include/linux/jni_md.h
/usr/lib/jvm/java-11-openjdk-ppc64el/include/linux/jni_md.h

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Just try a bootstrap build on ppc64le.

What operating system are you running Bazel on?

Ubuntu 18.04.3

[redsigma]

I had this problem on a raspberry pi 4 b (Debian 10 buster).
I managed to build version 3.2.0 by doing the following edits:

1.cd {bazel_root}/tools/jdk
2.Open BUILD file
3.Edit the ares marked in bold:

# TODO(adonovan): add cases for //src/conditions:linux_{ppc,s390x} when released in Bazel.
# TODO(adonovan): why is there no //src/conditions target meaning "just linux"?
cc_library(
name = "jni",
hdrs = [":jni_header"] + select({
"//src/conditions:linux_x86_64": [":jni_md_header-linux"],
"//src/conditions:linux_aarch64": [":jni_md_header-linux"],
"//src/conditions:darwin": [":jni_md_header-darwin"],
"//src/conditions:freebsd": [":jni_md_header-freebsd"],
"//src/conditions:openbsd": [":jni_md_header-openbsd"],
"//src/conditions:windows": [":jni_md_header-windows"],
"//conditions:default": [],
}),
includes = ["include"] + select({
"//src/conditions:linux_x86_64": ["include/linux"],
"//src/conditions:linux_aarch64": ["include/linux"],
"//src/conditions:darwin": ["include/darwin"],
"//src/conditions:freebsd": ["include/freebsd"],
"//src/conditions:openbsd": ["include/openbsd"],
"//src/conditions:windows": ["include/win32"],
"//conditions:default": [],
}),
)

To the following:

# TODO(adonovan): add cases for //src/conditions:linux_{ppc,s390x} when released in Bazel.
# TODO(adonovan): why is there no //src/conditions target meaning "just linux"?
cc_library(
name = "jni",
hdrs = [":jni_header"] + select({
"//src/conditions:linux_x86_64": [":jni_md_header-linux"],
"//src/conditions:linux_aarch64": [":jni_md_header-linux"],
"//src/conditions:darwin": [":jni_md_header-darwin"],
"//src/conditions:freebsd": [":jni_md_header-freebsd"],
"//src/conditions:openbsd": [":jni_md_header-openbsd"],
"//src/conditions:windows": [":jni_md_header-windows"],
"//conditions:default": [":jni_md_header-linux"],
}),
includes = ["include"] + select({
"//src/conditions:linux_x86_64": ["include/linux"],
"//src/conditions:linux_aarch64": ["include/linux"],
"//src/conditions:darwin": ["include/darwin"],
"//src/conditions:freebsd": ["include/freebsd"],
"//src/conditions:openbsd": ["include/openbsd"],
"//src/conditions:windows": ["include/win32"],
"//conditions:default": ["include/linux"],
}),
)

4. (Optional) I also did the following commands to make sure the headers files are seen:
cd /usr/lib/jvm/java-11-openjdk-armhf/include
cp ./linux/* .
After that bazel compiled succesfully. Also i'm using g++ (Debian 9.3.0-14) 9.3.0

[ceseo]

@redsigma Thanks.

If the maintainers are interested, this fixes the build for both ppc64/ppc64le: ceseo@2c49a93

I already have a Google CLA signed for golang, so I think I'm clear.