Features and improvements for S-CORE Release 0.8

[nradakovic]

Summary

Track the feature work, fixes, validation, and release-readiness updates needed in bazel_cpp_toolchains for the S-CORE 0.8 release.

This epic covers the module extension, package metadata, generated toolchain configuration, example validation workspace, and documentation required to deliver a stable and usable toolchain configuration layer for Linux and QNX targets.

Goals

• deliver a release-ready bazel_cpp_toolchains version aligned with S-CORE 0.8
• improve toolchain usability for supported Linux and QNX platforms
• keep package metadata and default version mappings current
• strengthen validation coverage through the example workspace
• document the supported release surface and known limitations

Scope

This epic includes:

• Linux toolchain improvements for supported host and cross-compilation scenarios
• QNX toolchain improvements, including SDP package/version handling
• updates to package metadata, URLs, checksums, and version mappings
• generated toolchain configuration and template updates
• validation updates in the example workspace
• release-facing documentation and usage examples

This epic does not include:

• shipping compiler binaries directly in this repository
• full platform integration beyond the supported validation scope
• exhaustive compiler correctness testing

Candidate Work Items

• update default package mappings where release-approved toolchain packages changed
• improve Linux and QNX toolchain configuration behavior
• close gaps in coverage, linking, sysroot, include path, or platform constraint handling
• validate supported example configurations for Linux and QNX
• review and update templates used to generate toolchain repositories
• refresh docs for supported versions, setup flow, and known limitations
• prepare release notes and final release tag

Suggested Child Issues

• update default QNX SDP package mappings for the 0.8 release baseline
• review Linux package metadata and runtime-specific variants
• improve generated QNX toolchain behavior and feature support
• validate the example workspace smoke-test matrix for release 0.8
• update documentation for release 0.8
• prepare release notes and publication checklist

Acceptance Criteria (DoD)

• release-targeted Linux and QNX toolchain configurations are implemented and validated
• package metadata and default version mappings are updated for the intended release surface
• generated repositories work for the supported toolchain scenarios
• example workspace smoke tests pass for the targeted release matrix
• documentation reflects the final supported configurations and known limitations
• a release candidate/tag can be cut for S-CORE 0.8

Validation

• verify module extension-based toolchain declaration works as expected
• verify package resolution and generated repository contents for affected toolchains
• verify compilation/linking in the example workspace for targeted configurations
• verify QNX-specific flows as far as allowed by package availability and licensing constraints

Tracking Checklist

• Confirm the target release version/tag for bazel_cpp_toolchains
• Create and link child issues
• Update package metadata and version mappings
• Implement required feature and configuration improvements
• Validate the release matrix in the example workspace
• Update documentation
• Prepare release notes
• Publish release for S-CORE 0.8

Notes

This epic is intended to coordinate the repository-side release work. Individual implementation details should be tracked in linked child issues so release scope, risk, and validation status remain visible.