10.4 only
version the build deps
rename old autoconf to autoconf2.13, new autoconf 2.60, got rid of autoconf2.5 (since now it would need to be autoconf2.60, and there is no reason to keep autoconf2.5 around... Also new m4 version
use -D__STDC_CONSTANT_MACROS to enable building
import from 10.4-transitional
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