build: Don't use deprecated AM_PROG_MKDIR_P

AM_PROG_MKDIR_P is deprecated since:

configure.ac:26: warning: The 'AM_PROG_MKDIR_P' macro is deprecated, and will soon be removed.
configure.ac:26: You should use the Autoconf-provided 'AC_PROG_MKDIR_P' macro instead,
configure.ac:26: and use '$(MKDIR_P)' instead of '$(mkdir_p)'in your Makefile.am files.

We are already using $(MKDIR_P) so we just need to call the right macro.

diff --git a/configure.ac b/configure.ac
index dd9dfa4..47710bb 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -23,7 +23,7 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_CC_PIE
 AC_PROG_INSTALL
-AM_PROG_MKDIR_P
+AC_PROG_MKDIR_P
 
 m4_define([_LT_AC_TAGCONFIG], [])
 m4_ifdef([AC_LIBTOOL_TAGS], [AC_LIBTOOL_TAGS([])])