drop -lfl flag

it is not useful anymore, as long as yyparse is either provided or
%option noyyparse is used

This is the case in our code base.

Makefile

@@ -36,7 +36,7 @@ ENABLE_Cxx14 ?= -std=c++17
 
 # External libraries
 FLEX-INCLUDE :=
-FLEX-LIB := -lfl
+FLEX-LIB := 
 
 GLIB-INCLUDE := $(shell pkg-config --silence-errors --cflags glib-2.0)
 GLIB-LIB := $(shell pkg-config --silence-errors --libs glib-2.0)
@@ -69,7 +69,7 @@ ifeq ($(UNAME_S),Darwin)
    MOTIF-INCLUDE := -I/usr/OpenMotif/include
    MOTIF-LIB := -L/usr/OpenMotif/lib
    UIL := /usr/OpenMotif/bin/uil
-   FLEX-LIB := -lfl -L/usr/local/opt/flex/lib
+   FLEX-LIB :=  -L/usr/local/opt/flex/lib
    OPENGL-LIB := -lgl -lglu -lglut
    CC := gcc -g -c -std=c99
    CPP := g++ -g -c -std=c++14 -Wno-unused-local-typedef

ODE-SDE/makefile

@@ -1,5 +1,5 @@
 
-OPTION = -O3 -std=c++11 -lfl  -lm
+OPTION = -O3 -std=c++11   -lm
 OPTIONW = -Wall
 
 CC = gcc

WN/SOURCE/DSRG/makefile

@@ -15,7 +15,7 @@ INCGREAT =../../INCLUDE/
 #commands
 COMP   = $(CC) -O3
 CFLAG  = -o 
-LFLAGS = -lgspnMCDSRG -lm -lfl -lglib-2.0  
+LFLAGS = -lgspnMCDSRG -lm  -lglib-2.0  
 LIBFLAG =-L$(LIB) 
 #-L$(GLIB) 
 # -L$(FLEXLIB)

WN/SOURCE/MDWN/CompilazioneRG2RRG.txt

@@ -1,6 +1,6 @@
 
-g++ -L../lib_header/ rg2rrg.cpp function.cpp -o RG2RRG -g -lgspnESRG -lm -lfl
+g++ -L../lib_header/ rg2rrg.cpp function.cpp -o RG2RRG -g -lgspnESRG -lm 
 
 
 X cluster
-g++  -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -m32  -L../lib_header/  rg2rrg.cpp function.cpp -o RG2RRG -O3  -lgspnESRG -lfl
+g++  -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -m32  -L../lib_header/  rg2rrg.cpp function.cpp -o RG2RRG -O3  -lgspnESRG 

WN/SOURCE/MDWN/Makefile.am

@@ -20,13 +20,13 @@ RG2RRG_SOURCES = rg2rrg.cpp function.cpp general.cpp
 # set the include path found by configure
 RG2RRG_LDFLAGS = $(all_libraries) -L../../../../../$(PATHL)/2bin/lib/
 
-RG2RRG_LDADD = -lgspnMCESRG -lm -lfl -lglpk
+RG2RRG_LDADD = -lgspnMCESRG -lm  -lglpk
 MDWN2WN_SOURCES = mdwn2wn.cpp functionmdwn.cpp general.cpp
 
 GDTMC_SOURCES = GenDTMC.cpp functionGenDTMC.cpp general.cpp
 GDTMC_LDFLAGS = $(all_libraries) -L../../../../../$(PATHL)/2bin/lib/ 
 
-GDTMC_LDADD = -lgspnMCESRG -lm -lfl -lglpk
+GDTMC_LDADD = -lgspnMCESRG -lm  -lglpk
 
 PARSER_SOURCES= parser.cpp general.cpp
 PARSER_LDFLAGS= $(all_libraries) 

WN/SOURCE/REACHAB/Makefile-ctmc

@@ -10,7 +10,7 @@ LIBSPOT= /root/SPOT/greatspn/i686_R2.4.21-0.13mdk/2bin/lib
 
 COMP   = $(CC) -g
 CFLAG  = -o
-LFLAGS = -lgspnSSP -lm -lfl 
+LFLAGS = -lgspnSSP -lm  
 YACC   = bison -v -p Prop
 YACFLAG= -d
 LEX    = flex -i -PProp

WN/SOURCE/RESRG/Makefile.am

@@ -9,7 +9,7 @@ INCLUDES= $(all_includes) -I../../../INCLUDE '-D"const.h"="const.h"' \
 
 # the library search path.
 ESRG_CTMC_LDFLAGS = $(all_libraries)  -L../../../../../$(PATHL)/2bin/lib/
-ESRG_CTMC_LDADD = -lgspnMCESRG -lm -lfl
+ESRG_CTMC_LDADD = -lgspnMCESRG -lm 
 ESRG_CTMC_CFLAGS= -Wall 
 noinst_HEADERS = class.h macro.h
 

WN/SOURCE/SOLVEXSRG/Makefile

@@ -16,8 +16,8 @@ COMP     = $(CC) -O3
 YACC     = byacc
 LEX      = flex
 CFLAG    = -o 
-LDFLAGS  = -lgspnMCDSRG -lm -lfl -lglib-2.0
-LEFLAGS  = -lgspnMCESRG -lm -lfl -lglib-2.0
+LDFLAGS  = -lgspnMCDSRG -lm  -lglib-2.0
+LEFLAGS  = -lgspnMCESRG -lm  -lglib-2.0
 LIBFLAG  = -L$(LIBGREAT)
 INCFLAG  = -I$(INCGREAT) $(GLIBINC) -I$(SRCDIR)/common/
 OBJDSRG  = $(OBJDIR)Gauss_Seidel.o $(OBJDIR)IndexDsrg.tab.o $(OBJDIR)IndexDsrg.o 

WN/SOURCE/SPOT/PROPS/Makefile

@@ -10,7 +10,7 @@ LIBSPOT= /root/SPOT/greatspn/i686_R2.4.21-0.13mdk/2bin/lib
 
 COMP   = $(CC) -g
 CFLAG  = -o
-LFLAGS = -lgspnSRG  -lm -lfl 
+LFLAGS = -lgspnSRG  -lm  
 YACC   = bison -v -p Prop
 YACFLAG= -d
 LEX    = flex -i -PProp