Index: head/math/gfan/Makefile
===================================================================
--- head/math/gfan/Makefile	(revision 493818)
+++ head/math/gfan/Makefile	(revision 493819)
@@ -1,46 +1,46 @@
 # Created by: Lorenzo Salvadore
 # $FreeBSD$
 
 PORTNAME=	gfan
 DISTVERSION=	0.6.2
 CATEGORIES=	math
 MASTER_SITES=	http://home.math.au.dk/jensen/software/gfan/
 DISTNAME=	${PORTNAME}${DISTVERSION}
 
 MAINTAINER=	phascolarctos@protonmail.ch
 COMMENT=	Software for computing Groebner fans and tropical varieties
 
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libcddgmp.so:math/cddlib \
 		libgmp.so:math/gmp
 
-USES=		gmake
+USES=		compiler:c++11-lang gmake localbase
 
-CFLAGS+=	-I${LOCALBASE}/include -DGMPRATIONAL
+CFLAGS+=	-DGMPRATIONAL
 
 OPTIONS_DEFINE=	DOCS EXAMPLES
 
 post-patch:
 	@${REINPLACE_CMD} \
 		's,ADDITIONALLINKOPTIONS = ,ADDITIONALLINKOPTIONS = -L${LOCALBASE}/lib ,' \
 		${WRKSRC}/Makefile
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/gfan ${STAGEDIR}${PREFIX}/bin
 	cd ${STAGEDIR}${PREFIX}/bin && ./gfan installlinks
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_MAN} ${WRKSRC}/doc/manual.dvi ${STAGEDIR}${DOCSDIR}
 	${INSTALL_MAN} ${WRKSRC}/doc/*.eps ${STAGEDIR}${DOCSDIR}
 
 post-install-EXAMPLES-on:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	cd ${WRKSRC}/examples && ${COPYTREE_SHARE} . ${STAGEDIR}${EXAMPLESDIR}
 
 do-test:
 	cd ${WRKSRC} && ./gfan _test
 
 .include <bsd.port.mk>
Index: head/math/gfan/files/patch-Makefile
===================================================================
--- head/math/gfan/files/patch-Makefile	(revision 493818)
+++ head/math/gfan/files/patch-Makefile	(revision 493819)
@@ -1,40 +1,49 @@
 --- 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 -Wuninitial
+@@ -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)/*