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(web2c.info)Compile-time options

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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'.  Note: 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.  Note:
     IPC and TeX.