autotools - AC_HELP_STRING is obsolete in 2.70 #856
Merged
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Autoconf flagged AC_HELP_STRING as obsolete [1]
Replace with AS_HELP_STRING [2] which was introduced in 2.69 which is the current PREREQ.
[1] https://www.gnu.org/software/autoconf//manual/autoconf-2.69/html_node/Obsolete-Macros.html#Obsolete-Macros
[2] https://www.gnu.org/software/autoconf//manual/autoconf-2.69/html_node/Pretty-Help-Strings.html#AS%5fHELP%5fSTRING