If the search paths for your installation differ from the standard
TeX directory structure (see section `Introduction' in A Directory Structure for TeX files), edit the file `kpathsea/texmf.cnf.in'
as desired, before running configure. For example, if you have
all your fonts or macros in one big directory.
You may also wish to edit the file `MakeTeXnames.cnf', either
before or after installation, to control various aspects of
MakeTeXPK and friends. See section `MakeTeX' configuration.
You do not need to edit `texmf.cnf.in' to change the default
top-level or other installation directories (only the paths).
You can and should do that when you run configure (next step).
You also do not need to edit `texmf.cnf.in' if you are willing to rely on `texmf.cnf' at runtime to define the paths, and let the compile-time default paths be incorrect. Usually there is no harm in doing this.
The section below explains default generation in more detail.
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