X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=Makefile;h=1ab3d9cce46d84d754060e2e207fa0a95a068f70;hp=f7ba81e7c7c12a188b43ba6dc3e57464fd79b033;hb=9cae3a759486e8dd608b5ff3c119b3a98f86ac6c;hpb=166c94e13ad09dd935e676e9dbc9a1e386417b8f

diff --git a/Makefile b/Makefile
index f7ba81e..1ab3d9c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,13 @@
 GTEST_DIR = /usr/src/gtest
 
+EIGEN_CXXFLAGS := $(shell pkg-config --cflags eigen3)
+ifeq ($(EIGEN_CXXFLAGS),)
+$(error Empty EIGEN_CXXFLAGS. You probably need to install Eigen3)
+endif
+
 CC=gcc
 CXX=g++
-CXXFLAGS=-Wall -g -I$(GTEST_DIR)/include $(shell pkg-config --cflags eigen3 )
+CXXFLAGS=-Wall -g -I$(GTEST_DIR)/include $(EIGEN_CXXFLAGS)
 LDFLAGS=-lSDL -lSDL_image -lGL -lrt -lpthread
 RANLIB=ranlib