[goroyabu]

Summary

• read the upstream translator version from src/version.c in the selected and verified src.tgz
• export that value as F2C_UPSTREAM_VERSION while preserving the repository release version in F2C_VERSION_STRING
• verify parser failures and installed-package metadata, and document the version contract and upstream refresh procedure

Related Issue

Closes #63

Verification

• cmake -S . -B build -DNET_FETCH=ON -DBUILD_TESTING=ON
• cmake --build build --parallel
• ctest --test-dir build --output-on-failure — 67/67 passed
• strict offline configure/build/test with NET_FETCH=OFF and the pinned local archives — 67/67 passed
• staged installation followed by the examples/cmake downstream project — 2/2 passed in both normal and strict offline configurations
• focused parser tests cover valid metadata, a missing src/version.c, a malformed declaration, and duplicate declarations
• independent code review found no concrete issues

CMake 3.20.6 is not installed locally. The existing Ubuntu 22.04 CI job will exercise the minimum supported CMake version.

Impact

CMake consumers can inspect F2C_UPSTREAM_VERSION independently of F2C_VERSION_STRING. Package compatibility checks continue to use the repository release version. Internal LIBF77 and LIBI77 component dates are not exposed.

Documentation

The README documents the two public version variables. CONTRIBUTING documents the required consistency checks for an upstream archive refresh.

Checklist

• The change is focused on one coherent maintenance outcome.
• Relevant local verification has been run and reported above.
• User-facing workflows and supported behavior are documented when changed.
• No downloaded upstream archives, extracted vendor sources, build outputs, or generated files were committed unintentionally.