tree 8514ba2d4f5f1cfa155056fb3fb8eeb8b68ef486
parent e67b5519f6ec2d6b596b764917559a4b3e138428
author Wyatt Hepler <hepler@google.com> 1593621650 -0700
committer CQ Bot Account <commit-bot@chromium.org> 1593631312 +0000

pw_polyfill, pw_minimal_cpp_stdlib: Fix namespace

- Clang / libc++ require standard library names to be defined in a
  special namespace. If they are simply declared in namespace std,
  strange errors can occur. This caused problems with std::span. Update
  pw_polyfill to add a macro that provides the std namespace
  declaration.
- Update pw_polyfill and pw_minimal_cpp_stdlib to use the new std
  namespace macro.
- Fully isolate the pw_minimal_cpp_stdlib library tests from the rest of
  Pigweed, since Pigweed builds with the standard library. This prevents
  isolates potentially conflicting standard library defintions.

Change-Id: I1a095e8ac879757ffba6796239e70785cc328cd7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/13240
Reviewed-by: Rob Mohr <mohrr@google.com>
Reviewed-by: David Rogers <davidrogers@google.com>
Commit-Queue: Wyatt Hepler <hepler@google.com>