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Document optional PCRE2 JIT and macOS default. #366

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atomicturtle merged 1 commit into from
Aug 5, 2026
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Document optional PCRE2 JIT and macOS default. #366

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9 changes: 9 additions & 0 deletions docs/manual/installation/installation-requirements.rst
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Expand Up @@ -44,6 +44,15 @@ To use the system's PCRE2, set the `PCRE2_SYSTEM` variable to yes:
# cd ossec-hids-*
# PCRE2_SYSTEM=yes ./install.sh

PCRE2 JIT (``USE_PCRE2_JIT``) is an optional speedup. Matching always goes
through ``pcre2_match``, which uses JIT when it is available and otherwise
falls back to interpreted matching. Builds no longer treat a JIT compile
failure as a fatal ``decoder.xml`` error (macOS and some system packages
often ship libpcre2 without usable JIT). macOS defaults to
``USE_PCRE2_JIT=no``. To force a non-JIT build explicitly::

# USE_PCRE2_JIT=no ./install.sh

zlib
----

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