client: optionally use libwrap

m4/libwrap.m4

@@ -0,0 +1,37 @@
+dnl
+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_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=""
+           LIBWRAP_LDFLAGS="-lwrap"
+
+           AC_SUBST([LIBWRAP_CFLAGS])
+           AC_SUBST([LIBWRAP_LDFLAGS])
+
+           dnl ACTION-IF-FOUND
+           $2
+
+        ]) dnl AC_ARG_ENABLE
+
+]) dnl AC_DEFUN