Fix INSTALL_INTERFACE for Boost versioned-layout installs on Windows

[sgerbino]

boost_install's __boost_install_update_include_directory expects either a raw path or $<BUILD_INTERFACE:path> to replace with the correct $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>. When INSTALL_INTERFACE was already set, the pattern match failed and the versioned include path (include/boost-X_Y) was never applied.

Summary by CodeRabbit

• Chores
  • Updated build configuration to properly expose library headers during installation for standalone builds while maintaining compatibility with superproject builds.

[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 f363cce and 1f95e8a.

📒 Files selected for processing (1)

• CMakeLists.txt

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📝 Walkthrough

Walkthrough

The CMakeLists.txt was modified to reorganize how include directory interfaces are configured for the boost_capy target. The INSTALL_INTERFACE directive was removed from the common setup function and added separately in the standalone (non-superproject) installation branch.

Changes

Cohort / File(s)	Summary
CMake Include Directory Interface CMakeLists.txt	Refactored target_include_directories configuration by removing INSTALL_INTERFACE from boost_capy_setup_properties function and adding it as a separate public declaration in the standalone install path, ensuring proper include directory resolution for both build and install scenarios.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

• Support FetchContent, add_subdirectory, and standalone install #182: Directly related as both PRs modify boost_capy's target_include_directories to adjust BUILD_INTERFACE/INSTALL_INTERFACE usage and configure standalone install/export behavior.
• why-not-tmc #128: Related through modifications to CMake properties for the boost_capy public target, though this PR focuses on include directory interfaces while the other addresses optimization settings.

Poem

🐰 Hopping through CMake with glee,
Build and install paths now set free,
Include dirs sorted, just right,
Standalone installs now in sight! ✨

🚥 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 directly addresses the main change: fixing INSTALL_INTERFACE handling for Boost versioned-layout installs on Windows, which is the core issue described in the PR objectives.

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[cppalliance-bot]

An automated preview of the documentation is available at https://183.capy.prtest3.cppalliance.org/index.html

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

2026-02-23 23:00:51 UTC

[cppalliance-bot]

GCOVR code coverage report https://183.capy.prtest3.cppalliance.org/gcovr/index.html
LCOV code coverage report https://183.capy.prtest3.cppalliance.org/genhtml/index.html
Coverage Diff Report https://183.capy.prtest3.cppalliance.org/diff-report/index.html

Build time: 2026-02-23 23:15:56 UTC