[ppc64le] Build failed on ppc64le for envoy-openssl

[Swapnali911]

Hi All,

We are facing build failures when building envoy-openssl branch v1.28 on RHEL9.2. Error is as follows
Can someone assist me in resolving this issue.

# bazel build -c opt --config=libc++ envoy --config=clang --define=wasm=disabled --cxxopt=-fpermissive
ERROR: /home/envoy/check_openssl/envoy-openssl/source/exe/BUILD:35:17: Illegal ambiguous match on configurable attribute "deps" in //source/exe:envoy_common_lib:
//bazel:linux_ppc
//bazel:disable_http3
Multiple matches are not allowed unless one is unambiguously more specialized or they resolve to the same value. See https://bazel.build/reference/be/functions#select.
INFO: Repository build_bazel_rules_swift instantiated at:
  /home/envoy/check_openssl/envoy-openssl/WORKSPACE:30:25: in <toplevel>
  /home/envoy/check_openssl/envoy-openssl/bazel/dependency_imports.bzl:32:29: in envoy_dependency_imports
  /root/.cache/bazel/_bazel_root/0cab9e149d5530907041b1f9089d77ad/external/build_bazel_rules_apple/apple/repositories.bzl:124:15: in apple_rules_dependencies
  /root/.cache/bazel/_bazel_root/0cab9e149d5530907041b1f9089d77ad/external/build_bazel_rules_apple/apple/repositories.bzl:86:14: in _maybe
Repository rule http_archive defined at:
  /root/.cache/bazel/_bazel_root/0cab9e149d5530907041b1f9089d77ad/external/bazel_tools/tools/build_defs/repo/http.bzl:372:31: in <toplevel>
ERROR: Analysis of target '//:envoy' failed; build aborted:
INFO: Elapsed time: 5.565s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (238 packages loaded, 819 targets configured)
    currently loading: @com_github_grpc_grpc//
    Fetching repository @com_google_absl; starting
    Fetching ...0cab9e149d5530907041b1f9089d77ad/external/com_google_absl; Extracting c8b33b0191a2db8364cacf94b267ea8a3f20ad83.tar.gz
    Fetching repository @com_github_gperftools_gperftools; starting
    Fetching ...el_root/0cab9e149d5530907041b1f9089d77ad/external/com_github_gperftools_gperftools; Extracting gperftools-2.10.tar.gz
    Fetching repository @com_github_gabime_spdlog; starting
    Fetching ...cache/bazel/_bazel_root/0cab9e149d5530907041b1f9089d77ad/external/com_github_gabime_spdlog; Extracting v1.12.0.tar.gz
    Fetching repository @com_googlesource_code_re2; starting
    Fetching ...ot/0cab9e149d5530907041b1f9089d77ad/external/com_googlesource_code_re2; Extracting 2023-09-01.tar.gz ... (11 fetches)

cc @NishikantThorat

[tedjpoole]

The problem here (in source/exe/BUILD and test/config_test/BUILD) is the use of a single select() over the two orthogonal concerns of platform & http3 support. This can lead to multiple matches (//bazel:linux_ppc and //bazel:disable_http3 in this case) which is ambiguous and therefore an error.

We need to somehow split the platform and http3 selection into separate select()s

[tedjpoole]

I've created envoyproxy/envoy#34482 because this really should be discussed & fixed further upstream if possible

[Swapnali911]

Resolved by envoyproxy/envoy#34483