--- Makefile.orig	2020-04-15 01:43:44 UTC
+++ Makefile
@@ -6,21 +6,27 @@
 # ---------------------------------------------------------------------
 
 # Directory of the target
-OUTPUT = gcta64
+OUTPUT = gcta
 
 # Compiler
-CXX = g++
+CXX ?= g++
 
 # EIGEN library
-EIGEN_PATH = ../../../Lib/eigen
+EIGEN_PATH ?= ../../../Lib/eigen
 
 # Intel MKL library
-MKL_PATH = /opt/intel/mkl
+MKL_PATH ?= /opt/intel/mkl
 
 # Compiler flags
-CXXFLAGS = -w -O3 -m64 -static -fopenmp -I $(EIGEN_PATH) -DEIGEN_NO_DEBUG -I $(MKL_PATH)/include
-LIB += -static -lz -Wl,--start-group  $(MKL_PATH)/lib/intel64/libmkl_intel_lp64.a $(MKL_PATH)/lib/intel64/libmkl_gnu_thread.a $(MKL_PATH)/lib/intel64/libmkl_core.a -Wl,--end-group -lpthread -lm -ldl
+CXXFLAGS ?= -w -O3 -m64 -static -fopenmp -I $(EIGEN_PATH) -DEIGEN_NO_DEBUG -I $(MKL_PATH)/include
+LDFLAGS += -lz -Wl,--start-group -lpthread -lm -ldl
 
+MKDIR ?=	mkdir
+DESTDIR ?=	.
+PREFIX ?=	/usr/local
+INSTALL ?=	install
+STRIP ?=	strip
+
 HDR += CommFunc.h \
            cdflib.h \
            dcdflib.h \
@@ -58,7 +64,7 @@ OBJ = $(SRC:.cpp=.o)
 all : $(OUTPUT) 
 
 $(OUTPUT) :
-	$(CXX) $(CXXFLAGS) -o $(OUTPUT) $(OBJ) $(LIB) 
+	$(CXX) $(CXXFLAGS) -o $(OUTPUT) $(OBJ) $(LDFLAGS) 
 
 $(OBJ) : $(HDR)
 
@@ -69,6 +75,13 @@ $(OBJ) : $(HDR)
 $(OUTPUT) : $(OBJ)
 
 FORCE:
+
+install:
+	${MKDIR} -p ${DESTDIR}${PREFIX}/bin
+	${INSTALL} -c ${OUTPUT} ${DESTDIR}${PREFIX}/bin
+
+install-strip: install
+	${STRIP} ${DESTDIR}${PREFIX}/bin/${OUTPUT}
 
 clean: 
 	rm -f *.o