Build of Hello World Failed on Darwin (MacOS)

[DennisFaucher]

$ bazel build -c opt mediapipe/examples/desktop/hello_world:hello_world
Starting local Bazel server and connecting to it...
DEBUG: Rule 'build_bazel_rules_apple' indicated that a canonical reproducible form can be obtained by modifying arguments commit = "6c9fcae7a3597aabd43f28be89466afe0eab18de", shallow_since = "1565379803 -0700" and dropping ["tag"]
DEBUG: Call stack for the definition of repository 'build_bazel_rules_apple' which is a git_repository (rule definition at /private/var/tmp/_bazel_faucherd/3a6923036fc899f82029b0fb9d70b802/external/bazel_tools/tools/build_defs/repo/git.bzl:181:18):

• /Users/faucherd/Documents/Personal/Machine_Learning/Google/mediapipe/WORKSPACE:251:1
  ERROR: /private/var/tmp/_bazel_faucherd/3a6923036fc899f82029b0fb9d70b802/external/local_config_cc/BUILD:46:1: in cc_toolchain_suite rule @local_config_cc//:toolchain: cc_toolchain_suite '@local_config_cc//:toolchain' does not contain a toolchain for cpu 'darwin_x86_64'
  ERROR: Analysis of target '//mediapipe/examples/desktop/hello_world:hello_world' failed; build aborted: Analysis of target '@local_config_cc//:toolchain' failed; build aborted
  INFO: Elapsed time: 58.077s
  INFO: 0 processes.
  FAILED: Build did NOT complete successfully (53 packages loaded, 1164 targets configured)

[jiuqiant]

The error could mean that Bazel can't find an appropriate c++ compiler on your mac.
Did you install Xcode in your /Applications folder (that's where Bazel will look for it), and are the Xcode command line tools also installed?
Please see the "Installing on macOS" section in install.md for more details.
If you still have the issue, let me know the version number of the OS, Bazel, XCode you have.

[DennisFaucher]

Thank you @jiuqiant. I did not have Xcode installed. I installed Xcode and got closer but still received a (different) error.

$ bazel run --verbose_failures --define MEDIAPIPE_DISABLE_GPU=1 mediapipe/examples/desktop/hello_world:hello_world
DEBUG: Rule 'build_bazel_rules_apple' indicated that a canonical reproducible form can be obtained by modifying arguments commit = "6c9fcae7a3597aabd43f28be89466afe0eab18de", shallow_since = "1565379803 -0700" and dropping ["tag"]
DEBUG: Call stack for the definition of repository 'build_bazel_rules_apple' which is a git_repository (rule definition at /private/var/tmp/_bazel_faucherd/3a6923036fc899f82029b0fb9d70b802/external/bazel_tools/tools/build_defs/repo/git.bzl:181:18):

• /Users/faucherd/Documents/Personal/Machine_Learning/Google/mediapipe/WORKSPACE:251:1
  INFO: Analyzed target //mediapipe/examples/desktop/hello_world:hello_world (0 packages loaded, 0 targets configured).
  INFO: Found 1 target...
  ERROR: /private/var/tmp/_bazel_faucherd/3a6923036fc899f82029b0fb9d70b802/external/zlib_archive/BUILD.bazel:5:1: undeclared inclusion(s) in rule '@zlib_archive//:zlib':
  this rule is missing dependency declarations for the following files included by 'external/zlib_archive/uncompr.c':

[jiuqiant]

I am wondering if you need to uninstall and install bazel again after your get Xcode and its command line tools. Also, please do bazel clean --expunge to make sure you have a clean start.

It seems like the error message is truncated, I would like to see more error message if possible. Moreover, can you report the version number of your OS, Bazel, clang, and XCode?

Here are some links that may help:

• https://stackoverflow.com/questions/43230143/tensorflow-build-issue-with-bazel#comment73708719_43230143
• Bad incremental build after APT update: undeclared inclusions bazelbuild/bazel#9213

[DennisFaucher]

Thank you again @jiuqiant. --expunge did the trick

Target //mediapipe/examples/desktop/hello_world:hello_world up-to-date:
bazel-bin/mediapipe/examples/desktop/hello_world/hello_world
INFO: Elapsed time: 212.890s, Critical Path: 149.52s
INFO: 539 processes: 539 darwin-sandbox.
INFO: Build completed successfully, 548 total actions
INFO: Build completed successfully, 548 total actions
I0820 16:49:42.129235 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.129977 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.130002 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.130019 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.130035 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.130053 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.130074 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.130100 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.130112 210040256 hello_world.cc:56] Hello World!
I0820 16:49:42.130125 210040256 hello_world.cc:56] Hello World!