web2c: Compile-time options

 
 2.2 Compile-time options
 ========================
 
 In addition to the 'configure' options listed in the previous section,
 there are a few things that can be affected at compile-time with C
 definitions, rather than with 'configure'.  Using any of these is
 unusual.
 
    To specify extra compiler flags ('-DNAME' in this case), the simplest
 thing to do is:
      make XCFLAGS="CCOPTIONS"
 You can also set the 'CFLAGS' environment variable before running
 'configure'.  ⇒(kpathsea)configure environment.
 
    Anyway, here are the possibilities:
 
 '-DFIXPT'
 '-DNO_MF_ASM'
      Use the original WEB fixed-point routines for Metafont and MetaPost
      arithmetic calculations regarding fractions.  By default,
      assembly-language routines are used on x86 hardware with GNU C
      (unless 'NO_MF_ASM' is defined), and floating-point routines are
      used otherwise.
 
 '-DIPC_DEBUG'
      Report on various interprocess communication activities.  ⇒IPC
      and TeX IPC and TeX.