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-rw-r--r--configure.ac2
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index c6f12d6..3c977a4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,8 +25,10 @@
# autoconf requirements and initialization
AC_INIT([the fast lexical analyser generator],[2.6.4],[flex-help@lists.sourceforge.net],[flex])
+AC_PREREQ([2.60])
AC_CONFIG_SRCDIR([src/scan.l])
AC_CONFIG_AUX_DIR([build-aux])
+AC_USE_SYSTEM_EXTENSIONS
LT_INIT
AM_INIT_AUTOMAKE([1.15 -Wno-portability foreign std-options dist-lzip parallel-tests subdir-objects])
AC_CONFIG_HEADER([src/config.h])