Use LT_INIT instead of obsolete AM_PROG_LIBTOOL.
From Michal Vyskocil.
diff --git a/configure.ac b/configure.ac
index ff521d7..2bb9f9a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_PREREQ(2.57)
+AC_PREREQ([2.60])
AC_INIT([libzip],[0.11.1a],[libzip@nih.at])
AC_CONFIG_SRCDIR([lib/zip_add.c])
AC_CONFIG_HEADERS([config.h])
@@ -40,7 +40,7 @@
AC_EXEEXT
-AM_PROG_LIBTOOL
+LT_INIT
AC_CHECK_FUNCS([_close _dup _fdopen _fileno _open _snprintf _strdup _stricmp fseeko ftello getopt open snprintf strcasecmp strdup])
AC_CHECK_FUNCS([mkstemp], [], [AC_LIBOBJ(mkstemp)])