Don't override GTEST_DIR if it already is set.

diff --git a/Makefile b/Makefile
index c905c599393972fec0ce2b71046772967f2faf4c..83e6852a578d91203cc476017c700d8b83f1b92c 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-GTEST_DIR = /usr/src/gtest
+GTEST_DIR ?= /usr/src/gtest

 
 EIGEN_CXXFLAGS := $(shell pkg-config --cflags eigen3)
 ifeq ($(EIGEN_CXXFLAGS),)
 
 EIGEN_CXXFLAGS := $(shell pkg-config --cflags eigen3)
 ifeq ($(EIGEN_CXXFLAGS),)