GNU m4 is the GNU version of the m4 macro preprocessor. It is designed to avoid many kinds of limits found in traditional m4s: limits like maximum line lengths, maximum size of a macro, number of macros, etc.
The GNU Autoconf package makes extensive use of the features of GNU m4.
GNU m4 is currently maintained (albeit intermittently) by René Seindal.
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... in the world, the PRC separated from the CRC in the 1920s in a schism over the issue of common grace.
Reformed Church in the United States[?] (German Reformed)
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