Consult BAZEL_LINKOPTS env variable when detecting linker flags in autogenerated cc toolchain

Relevant to #4031, fixes #4524.

Does not affect the osx + xcode toolchain that supports both C++ and ObjC!

RELNOTES: BAZEL_LINKOPTS is now consulted when autoconfiguring c++ toolchain

Now linker flags for the autogenerated C++ toolchain can be controlled by
BAZEL_LINKOPTS environment variable (using colon as a flag separator):

    BAZEL_LINKOPTS=-lc++ bazel build //...

The default value is "-lstdc++:-lm".

PiperOrigin-RevId: 187173297
2 files changed
tree: 8a81259559d86292c12c5e4f358403117901102d
  1. examples/
  2. scripts/
  3. site/
  4. src/
  5. third_party/
  6. tools/
  7. .gitattributes
  8. .gitignore
  9. AUTHORS
  10. BUILD
  11. CHANGELOG.md
  12. combine_distfiles.py
  13. combine_distfiles_to_tar.sh
  14. compile.sh
  15. CONTRIBUTING.md
  16. CONTRIBUTORS
  17. ISSUE_TEMPLATE.md
  18. LICENSE
  19. README.md
  20. WORKSPACE
README.md

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