Bazel build error: no such package '@com_github_golang_protobuf//proto'

[chenglinzhang]

I am using the following command line to build envoy on ppc64le Power 8:

bazel build --copt "-D __linux" @envoy//source/exe:envoy-static

with the same WORKSPACE

go_register_toolchains(go_version="host")

and the GO version is 1.10.3 from https://golang.org/dl/ for ppc64le, and the OS is Ubuntu 16.04.

Am I missing anything? Any hint to pinpoint the error will be appreciated.

ERROR details:

/cache/_bazel_root/b570b5ccd0454dc9af9f65ab1833764d/external/com_lyft_protoc_gen_validate/validate/BUILD:35:1: no such package '@com_github_golang_protobuf//proto': no such package '@io_bazel_rules_go_repository_tools//': failed to build gazelle: # github.com/bazelbuild/bazel-gazelle/cmd/gazelle
/cache/_bazel_root/b570b5ccd0454dc9af9f65ab1833764d/external/go_sdk/pkg/tool/linux_ppc64le/link: running gcc failed: exec: "gcc": executable file not found in $PATH

and referenced by '@com_lyft_protoc_gen_validate//validate:go_default_library'
ERROR: Analysis of target '//source/exe:envoy-static' failed; build aborted: no such package '@com_github_golang_protobuf//proto': no such package '@io_bazel_rules_go_repository_tools//': failed to build gazelle: # github.com/bazelbuild/bazel-gazelle/cmd/gazelle
/cache/_bazel_root/b570b5ccd0454dc9af9f65ab1833764d/external/go_sdk/pkg/tool/linux_ppc64le/link: running gcc failed: exec: "gcc": executable file not found in $PATH

[clnperez]

Sorry I didn't see these! i'll fix my mail notifications. There's a problem in the rules_go where the PATH needs to be fixed for non-x86 architectures. Here's the upstream patch: bazel-contrib/bazel-gazelle#242

However, for earlier versions of rules_go, that logic was in a different place. Here's the workaround for your sandbox in the meantime:

vim $(bazel info output_base)/external/io_bazel_rules_go/go/private/repository_tools.bzl

and patch the PATH like this:

diff --git a/go/private/repository_tools.bzl
b/go/private/repository_tools.bzl
index 4ef1d85..5900aea 100644
--- a/go/private/repository_tools.bzl
+++ b/go/private/repository_tools.bzl
@@ -58,6 +58,7 @@ def _go_repository_tools_impl(ctx):
   env = {
     'GOROOT': str(go_tool.dirname.dirname),
     'GOPATH': str(ctx.path('')),
+    'PATH'  : ctx.os.environ["PATH"],
   }

There's a PR open in the envoy community to get the new rules_go: envoyproxy/envoy#3949