kpathsea: Casefolding search
5.4 Casefolding search
======================
In Kpathsea version 6.3.0 (released with TeX Live 2018), a new fallback
search was implemented on Unix-like systems, including Macs: for each
path element in turn, if no match is found by the normal search, and the
path element allows for checking the filesystem, a second check is made
for a case-insensitive match.
This is enabled at compile-time on Unix systems, and enabled at
runtime by setting the configuration variable 'texmf_casefold_search',
to a true value, e.g., '1'; this is done by default in TeX Live.
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kpathsea: Path expansion
kpathsea: Path searching
kpathsea: Filename database