$NetBSD: patch-src_library_stats_src_Makefile.in,v 1.2 2016/07/26 04:53:33 wen Exp $

${R_INCLUDE_DIR} is used in the default compiler flags.

--- src/library/stats/src/Makefile.in.orig	2016-07-26 01:57:49.000000000 +0000
+++ src/library/stats/src/Makefile.in
@@ -10,6 +10,7 @@ top_srcdir = @top_srcdir@
 top_builddir = ../../../..
 subdir = src/library/$(pkg)/src
 R_HOME = $(top_builddir)
+R_INCLUDE_DIR = $(R_HOME)/include
 ## for $(R_HOME)/etc${R_ARCH}/Makeconf
 R_SHARE_DIR = $(R_HOME)/share
 R_INCLUDE_DIR = $(R_HOME)/include