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lilypond-usage: Environment variables

 
 Environment variables
 ---------------------
 
 ‘lilypond’ recognizes the following environment variables:
 ‘LILYPOND_DATADIR’
      This specifies a directory where locale messages and data files
      will be looked up by default.  The directory should contain
      subdirectories called ‘ly/’, ‘ps/’, ‘tex/’, etc.
 
 ‘LANG’
      This selects the language for the warning messages.
 
 ‘LILYPOND_LOGLEVEL’
      The default loglevel.  If LilyPond is called without an explicit
      loglevel (i.e.  no ‘--loglevel’ command line option), this value is
      used.
 
 ‘LILYPOND_GC_YIELD’
      A variable, as a percentage, that tunes memory management behavior.
      A higher values means the program uses more memory, a smaller value
      means more CPU time is used.  The default value is ‘70’.
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