Remove -fcoroutines and -fexperimental-library flags

[sgerbino]

Capy now propagates these as PUBLIC compile options, making local flag-setting redundant for downstream consumers.

Summary by CodeRabbit

• Chores
  • Simplified build configurations by removing unnecessary compiler flags from continuous integration workflows and CMake build scripts across macOS, Linux, and FreeBSD platforms.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 21875c3 and 7da26fb.

⛔ Files ignored due to path filters (3)

• build/Jamfile is excluded by !**/build/**
• perf/bench/CMakeLists.txt is excluded by !**/bench/**
• test/unit/Jamfile is excluded by !**/test/**

📒 Files selected for processing (4)

• .github/workflows/ci.yml
• .github/workflows/code-coverage.yml
• CMakeLists.txt
• cmake/CorosioBuild.cmake

💤 Files with no reviewable changes (2)

• cmake/CorosioBuild.cmake
• CMakeLists.txt

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📝 Walkthrough

Walkthrough

The pull request removes experimental and unsupported compiler flags from build configurations across CI/CD workflows and CMake files. Specifically, -fexperimental-library is eliminated from macOS and Linux build configurations in GitHub Actions workflows, while -fcoroutines GNU-specific flags are removed from CMake build system definitions.

Changes

Cohort / File(s)	Summary
CI Workflows .github/workflows/ci.yml, .github/workflows/code-coverage.yml	Removed -fexperimental-library flag from macOS Apple-Clang compiler configurations and coverage-related build steps across multiple configurations, simplifying cxxflags to use --coverage alone where applicable.
CMake Build System CMakeLists.txt, cmake/CorosioBuild.cmake	Removed GNU-specific -fcoroutines compile option from boost_corosio target and corosio_add_tls_library function, eliminating compiler-specific coroutine handling.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related issues

• Remove -fexperimental-library and -fcoroutines flags after capy #187 #179: Directly addresses the removal of -fexperimental-library and -fcoroutines flags that were problematic in the build configurations.

Possibly related PRs

• Pr/win mac coverage #165: Modifies .github/workflows/code-coverage.yml macOS cxxflags, introducing the same flags that this PR now removes.
• Bench/CMake #177: Removes GNU-specific -fcoroutines CMake compile options from the same locations as this PR.
• Add macOS and Windows code coverage builds #164: Updates code-coverage workflow macOS coverage build configuration that is directly affected by flag removals in this PR.

Poem

🐰 Experimental flags, we bid thee farewell,
No coroutines forced, our builds run so well!
Simplified configurations, clean and serene,
The cleanest CI workflows we've ever seen! ✨

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: removing two specific compiler flags (-fcoroutines and -fexperimental-library) from the configuration files.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.22%. Comparing base (21875c3) to head (7da26fb).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #181   +/-   ##
========================================
  Coverage    76.22%   76.22%           
========================================
  Files           98       98           
  Lines        10467    10467           
  Branches      2383     2383           
========================================
  Hits          7978     7978           
  Misses        1762     1762           
  Partials       727      727           

Flag	Coverage Δ
windows	69.48% <ø> (ø)

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[cppalliance-bot]

An automated preview of the documentation is available at https://181.corosio.prtest3.cppalliance.org/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2026-02-27 14:56:12 UTC

[cppalliance-bot]

GCOVR code coverage report https://181.corosio.prtest3.cppalliance.org/gcovr/index.html
LCOV code coverage report https://181.corosio.prtest3.cppalliance.org/genhtml/index.html
Coverage Diff Report https://181.corosio.prtest3.cppalliance.org/diff-report/index.html

Build time: 2026-02-27 15:03:12 UTC