I want to install LoRDEC using the following tutorial (https://biosphere.france-bioinformatique.fr/wikia2/index.php/Lordec). I am not able to install it in my linux system. Actually the 4th point of this installation tutorial is quite confusing. I am not able to change the variables in make file .

Please see the make file of tool.

# external resources
GATB_VER=1.1.0
GATB=gatb-core-$(GATB_VER)-Linux

# FLAGS
CPPFLAGS =        -I$(GATB)/include/ -std=c++0x -O2 # -g # -O3 -DOLD_GATB # put pre-processor settings (-I, -D, etc) here
CXXFLAGS =gcc-5.4.0
 #-Wall  # put compiler settings here
# put linker settings here
LDFLAGS =         -L$(GATB)/lib/ -lgatbcore -lhdf5 -ldl -lz -lpthread -std=c++0x
#CXX    = g++ # $(CXXFLAGS)
RM      = rm -f
MV    = mv

CFILES_CORRECT = lordec-correct.cpp
CFILES_STATS = lordec-stat.cpp
CFILES_TRIM = lordec-trim.cpp
CFILES_TRIM_SPLIT = lordec-trim-split.cpp
CFILES_GRAPH = lordec-build-SR-graph.cpp

OBJS_CORRECT    = $(CFILES_CORRECT:.cpp=.o)
OBJS_STATS    = $(CFILES_STATS:.cpp=.o)
OBJS_TRIM    = $(CFILES_TRIM:.cpp=.o)
OBJS_TRIM_SPLIT    = $(CFILES_TRIM_SPLIT:.cpp=.o)

PROG        = LoRDEC
PROG_CORRECT    = lordec-correct
PROG_STATS    = lordec-stat
PROG_TRIM    = lordec-trim
PROG_TRIM_SPLIT    = lordec-trim-split
PROG_GRAPH    = lordec-build-SR-graph

# History of versions
VERSION=0.4.1
VERSION=0.5

LICENSE=../LICENSE/Licence_CeCILL_V2.1-en.txt

# for testing
DATA=./DATA
RES=./RES
TEST_SCRIPT=test-lordec.sh

# These also need to be included in distribution package
HPPFILES=lordec-gen.hpp

all:        $(PROG_CORRECT) $(PROG_STATS) $(PROG_TRIM) $(PROG_TRIM_SPLIT) $(PROG_GRAPH)

$(PROG_CORRECT):    $(OBJS_CORRECT)
            $(CXX) $(OBJS_CORRECT) $(LDFLAGS) -o $@

$(PROG_STATS):        $(OBJS_STATS)
            $(CXX) $(OBJS_STATS) $(LDFLAGS) -o $@

$(PROG_TRIM):        $(OBJS_TRIM)
            $(CXX) $(OBJS_TRIM) $(LDFLAGS) -o $@

$(PROG_TRIM_SPLIT):    $(OBJS_TRIM_SPLIT)
            $(CXX) $(OBJS_TRIM_SPLIT) $(LDFLAGS) -o $@

$(PROG_GRAPH):        $(CFILES_GRAPH)
            $(CXX)  $@.cpp -o $@ $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS)


$(OBJS_CORRECT):    %.o: %.cpp
            $(CXX) $< $(CPPFLAGS) -c

$(OBJS_STATS):        %.o: %.cpp
            $(CXX) $< $(CPPFLAGS) -c

$(OBJS_TRIM):        %.o: %.cpp
            $(CXX) $< $(CPPFLAGS) -c

$(OBJS_TRIM_SPLIT):    %.o: %.cpp
            $(CXX) $< $(CPPFLAGS) -c

install_dep:
        wget http://gatb-core.gforge.inria.fr/versions/bin/gatb-core-$(GATB_VER)-Linux.tar.gz && \
        tar -axf gatb-core-$(GATB_VER)-Linux.tar.gz

bin:        
        mkdir bin

instbin:
        $(MV) $(PROG_CORRECT) $(PROG_STATS) $(PROG_TRIM) $(PROG_TRIM_SPLIT) $(PROG_GRAPH) bin

clean:
        $(RM) $(OBJS_CORRECT) $(OBJS_STATS) $(OBJS_TRIM) $(OBJS_TRIM_SPLIT) $(RES)/*

purge:        clean
        $(RM) $(PROG_CORRECT) $(PROG_STATS) $(PROG_TRIM) $(PROG_TRIM_SPLIT) $(PROG_GRAPH)

test:        
        ./$(TEST_SCRIPT)