build: update configure.ac

Some constructs in there are old-fashioned. Replace them by their
modern counterparts.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

1 files changed, 2 insertions, 5 deletions

diff --git a/autogen.sh b/autogen.sh
index 189e2f4..36b2a2a 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,7 +1,4 @@
 #!/bin/sh
 
-aclocal
-autoheader
-libtoolize -c --force 
-automake -c --add-missing
-autoconf
+autoreconf -fi;
+rm -Rf autom4te.cache;