Enforce minimum autoconf version (currently 2.68).

jasone · jasone · commit 2b31cf5bd272 · 2017-06-29T16:23:35.000-07:00
This resolves jemalloc#912.
diff --git a/configure.ac b/configure.ac
@@ -1,4 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
+AC_PREREQ(2.68)
 AC_INIT([Makefile.in])
 
 AC_CONFIG_AUX_DIR([build-aux])

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`dnl Process this file with autoconf to produce a configure script.`
	`2`	`+AC_PREREQ(2.68)`
`2`	`3`	`AC_INIT([Makefile.in])`
`3`	`4`
`4`	`5`	`AC_CONFIG_AUX_DIR([build-aux])`