--- description: Compatibility notes and live compatibility reports for Jawk against POSIX, BWK, and gawk test suites. date_published: 2026-05-13 date_modified: 2026-05-13 canonical_url: https://jawk.io/compatibility.html --- # Compatibility and Compliance On this Page - [POSIX](#posix) - [One True Awk (BWK)](#one-true-awk-28bwk-29) - [GNU Awk (gawk)](#gnu-awk-28gawk-29) - [See Also](#see-also) Jawk is checked during `mvn verify` against 3 upstream compatibility families: [POSIX awk specifications](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/awk.html)[1], [One True Awk](https://github.com/onetrueawk/awk)[2], [GNU Awk](https://www.gnu.org/software/gawk/)[3]. This page summarizes what currently passes, fails, errors, or remains intentionally skipped. ## [POSIX](#posix) Specification-focused coverage transcribed from the [POSIX awk utility requirements](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/awk.html)[1]. 95 / 95 Passed Failed Error Skipped 100% [Open the Failsafe report](failsafe.html#io-jawk-posix)[4] for per-test details, stack traces, and grouped results. ## [One True Awk (BWK)](#one-true-awk-bwk) Compatibility coverage derived from the original [One True Awk](https://github.com/onetrueawk/awk)[2] test collection. 220 / 225 Passed Failed Error Skipped 97% [Open the Failsafe report](failsafe.html#io-jawk-onetrueawk)[5] for per-test details, stack traces, and grouped results. ## [GNU Awk (gawk)](#gnu-awk-gawk) [GNU Awk](https://www.gnu.org/software/gawk/)[3] compatibility gathered from explicit Java integration suites that mirror the main gawk test families: core behavior, extensions, locale-sensitive behavior, and optional features. 151 / 619 Passed Failed Error Skipped 24% [Open the Failsafe report](failsafe.html#io-jawk-gawk)[6] for per-test details, stack traces, and grouped results. ## [See Also](#see-also) - [CLI options and tuple workflows](cli-reference.html)[7] - [Java compilation and reuse APIs](java-compile.html)[8]