--- rxvt-unicode/aclocal.m4	2011/05/30 21:24:40	1.7
+++ rxvt-unicode/aclocal.m4	2015/06/16 11:56:37	1.8
@@ -1,2 +1,17 @@
 m4_include([libptytty/ptytty.m4])
 
+dnl maybe import pkg.m4 and use PKG_CHECK_MODULES in place of this macro
+AC_DEFUN([RXVT_CHECK_MODULES],
+[
+  AC_MSG_CHECKING(for $2)
+  if test $PKG_CONFIG != no && $PKG_CONFIG --exists $2; then
+    $1[]_CFLAGS="`$PKG_CONFIG --cflags $2`"
+    $1[]_LIBS="`$PKG_CONFIG --libs $2`"
+
+    AC_MSG_RESULT(ok)
+    $3
+  else
+    AC_MSG_RESULT(no)
+    $4
+  fi
+])