configure.ac: new libwrap autoconf test

configure.ac

@@ -205,7 +205,20 @@ dnl ##
 dnl misc libraries
 dnl ##
 
-AC_CHECK_LIBWRAP
+AC_ARG_ENABLE([libwrap],
+	AS_HELP_STRING([--enable-libwrap], [use libwrap]),,
+	[enable_libwrap=auto])
+
+if test x$enable_libwrap != xno; then
+	AC_CHECK_LIBWRAP(found_libwrap=yes, found_libwrap=no)
+	MPD_AUTO_RESULT(libwrap, libwrap, [libwrap not found])
+fi
+
+if test x$enable_libwrap = xyes; then
+	AC_SUBST(LIBWRAP_CFLAGS)
+	AC_SUBST(LIBWRAP_LDFLAGS)
+	AC_DEFINE(HAVE_LIBWRAP, 1, [define to enable libwrap library])
+fi
 
 AC_ARG_ENABLE(cue,
 	AS_HELP_STRING([--enable-cue],

m4/libwrap.m4

@@ -3,35 +3,12 @@ dnl Usage:
 dnl AC_CHECK_LIBWRAP([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
 dnl
 
-AC_DEFUN([AC_CHECK_LIBWRAP],
-         [dnl start
-
-    AC_ARG_ENABLE([libwrap],
-        [AS_HELP_STRING([--disable-libwrap],
-        [use libwrap (default enabled)])], ,
-        [
+AC_DEFUN([AC_CHECK_LIBWRAP],[
 	AC_CHECK_HEADERS([tcpd.h],
-                           [],
-                           [AC_MSG_ERROR([tpcd.h libwrap header not found])]
-                           $3)
-
-           AC_CHECK_LIB([wrap],
-                        [request_init],
-                        [],
-                        [AC_MSG_ERROR([libwrap not found !])]
-                        $3)
-
-           AC_DEFINE(HAVE_LIBWRAP, 1, [define to enable libwrap library])
-
-           LIBWRAP_CFLAGS=""
+		AC_CHECK_LIB([wrap], [request_init],
+			[LIBWRAP_CFLAGS=""
 			LIBWRAP_LDFLAGS="-lwrap"
-
-           AC_SUBST([LIBWRAP_CFLAGS])
-           AC_SUBST([LIBWRAP_LDFLAGS])
-
-           dnl ACTION-IF-FOUND
-           $2
-
-        ]) dnl AC_ARG_ENABLE
-
-]) dnl AC_DEFUN
+			$1],
+			$2),
+		$2)
+])