Github user dragon512 commented on the issue:
https://github.com/apache/trafficserver/pull/980
so I tried the latest and I get an error of
autoreconf -if
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, `build/_aux'.
libtoolize: copying file `build/_aux/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIR, `build'.
libtoolize: copying file `build/libtool.m4'
libtoolize: copying file `build/ltoptions.m4'
libtoolize: copying file `build/ltsugar.m4'
libtoolize: copying file `build/ltversion.m4'
libtoolize: copying file `build/lt~obsolete.m4'
configure:21883: error: possibly undefined macro: PKG_CHECK_EXISTS
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
autoreconf: /usr/bin/autoconf failed with exit status: 1
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