From 2aab238c61044c01a0fbed438d1cf3cbb3f13d39 Mon Sep 17 00:00:00 2001
From: Xianyi Zhang <xianyi@iscas.ac.cn>
Date: Fri, 22 Apr 2011 22:14:06 +0800
Subject: [PATCH] Fixed #16. Print the user-friendly message when detecting CPU
 failed.

---
 Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Makefile b/Makefile
index 52f649f77..77dd3c2e7 100644
--- a/Makefile
+++ b/Makefile
@@ -96,6 +96,9 @@ endif
 endif
 
 libs :
+ifeq ($(CORE), UNKOWN)
+	$(error OpenBLAS: Detecting CPU failed. Please set TARGET explicitly, e.g. make TARGET=your_cpu_target. Please read README for the detail.)
+endif
 	-ln -fs $(LIBNAME) libopenblas.$(LIBSUFFIX)
 	for d in $(SUBDIRS) ; \
 	do if test -d $$d; then \