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ch-diff & ch-hist

Detect breaking changes in C libraries, using only their header files (no inspection of ELF binaries).

These tools help you identify changes that could break existing code before they cause issues in production. They also help you support multiple versions of a library in the case of breaking changes.

Tool Purpose
ch-diff Compare two header files and detect breaking changes.
ch-hist Analyze the history of a header file to track changes over time.

Usage

ch-diff: Compare Two Headers

ch-diff old_header.h new_header.h

Output: A detailed report of breaking changes between the two files.

ch-hist: Analyze the History of a Header

ch-hist -i header-versions-dir -o output-dir --whitelist whitelist.txt

Output: A timeline of changes, highlighting breaking modifications.