--- Makefile.orig	2017-09-28 13:44:12 UTC
+++ Makefile
@@ -110,13 +110,13 @@ MKDIR=mkdir -p
 PREFIX =
 SHELL       = /bin/sh
 #ARCH        = LINUX
-CC          = $(PREFIX)gcc
+CC          ?= $(PREFIX)gcc
 CLINKER     = $(CC)
-CXX         = $(PREFIX)g++
+CXX         ?= $(PREFIX)g++
 CCLINKER    = $(CXX)
 #OPTFLAGS    = -O2 -DGMPRATIONAL -DNDEBUG
 # Note that gcc produces wrong code with -O3
-OPTFLAGS    =  -DGMPRATIONAL -Wuninitialized -fno-omit-frame-pointer -O2	 #-O3 -fno-guess-branch-probability #-DNDEBUG
+#OPTFLAGS    =  -DGMPRATIONAL -Wuninitialized -fno-omit-frame-pointer -O2	 #-O3 -fno-guess-branch-probability #-DNDEBUG
 #OPTFLAGS    =  -DGMPRATIONAL -Wuninitialized -fno-omit-frame-pointer -O3 -mavx -msse2  -finline-limit=1000 -ffast-math -Wuninitialized # -fno-guess-branch-probability #-DNDEBUG -ftree-vectorizer-verbose=2
 #OPTFLAGS    =  -DGMPRATIONAL -Wuninitialized -fno-omit-frame-pointer -O1             -fno-guess-branch-probability
  #-DNDEBUG
@@ -125,9 +125,9 @@ OPTFLAGS    =  -DGMPRATIONAL -Wuninitialized -fno-omit
 #OPTFLAGS    =  -DGMPRATIONAL -Wuninitialized -fno-omit-frame-pointer -O3 -msse2 -ftree-vectorizer-verbose=2 -ffast-math #-DNDEBUG
 #OPTFLAGS    =  -DGMPRATIONAL -Wuninitialized -fno-omit-frame-pointer -O3 -mavx -msse2 -ftree-vectorizer-verbose=2 -ffast-math #-DNDEBUG
 
-CFLAGS	  = $(OPTFLAGS) $(GPROFFLAG) $(STACTDUMP_OPTIONS) $(ADDITIONALINCLUDEOPTIONS) -std=c++0x -g $(CDDDEFINE_PREFIX) #-pedantic
+CFLAGS	  += $(OPTFLAGS) $(GPROFFLAG) $(STACTDUMP_OPTIONS) $(ADDITIONALINCLUDEOPTIONS) -std=c++0x -g $(CDDDEFINE_PREFIX) #-pedantic
 #CFLAGS	  = $(OPTFLAGS) $(GPROFFLAG) $(STACTDUMP_OPTIONS) $(ADDITIONALINCLUDEOPTIONS) -D_GLIBCXX_DEBUG -std=c++0x -g $(CDDDEFINE_PREFIX) #-pedantic
-CCFLAGS	  = $(CFLAGS)
+CCFLAGS	  += $(CFLAGS)
 FFLAGS	  = $(OPTFLAGS)
 
 CATSOBJECTS =	lp_cdd.o \
@@ -394,7 +394,7 @@ EXECS	  = $(MAIN)
 # (compiling with gcc version 4.7.2 and running gfan _tropicaltraverse on a starting cone for Grassmann3_7)
 # Either this is a bug in the code or in the compiler. The bug disappears by compiling with -fno-guess-branch-probability
 src/symmetrictraversal.o: src/symmetrictraversal.cpp
-	$(CXX) $(CFLAGS) -fno-guess-branch-probability  -c src/symmetrictraversal.cpp -o src/symmetrictraversal.o
+	$(CXX) $(CFLAGS) -c src/symmetrictraversal.cpp -o src/symmetrictraversal.o
 # If compiling with clang, use the line below instead:
 #	$(CXX) $(CFLAGS) -c src/symmetrictraversal.cpp -o src/symmetrictraversal.o
 
@@ -420,7 +420,7 @@ default: $(OBJECTS) $(ADDITIONALOBJECTS) $(EXECS)
 
 $(MAIN): $(OBJECTS)
 #	$(CCLINKER) $(OBJECTS) $(ADDITIONALLINKOPTIONS) $(GPROFFLAG) -lpthread  -o $(MAIN)
-	$(CCLINKER) $(OBJECTS) $(ADDITIONALLINKOPTIONS) $(GPROFFLAG) -lpthread -rdynamic -o $(MAIN)
+	$(CCLINKER) $(OBJECTS) $(LDFLAGS) $(ADDITIONALLINKOPTIONS) $(GPROFFLAG) -lpthread -rdynamic -o $(MAIN)
 
 release:
 	rm -f -r $(RELEASEDIR)/*