Please help I have a project with Lexical analysis

I$$m running Linux environment, WSL$,$ Ubuntu, Flex, Bison, VSC$.$

scanner.l file

$/*$ This file contains flex input file $*/$

$\%\{$

#include

#include

using namespace std;

#include "listing.h$"$

#include "tokens.h$"$

$\%\}$

$\%$option noyywrap

ws $[\backslash$t$\backslash$r$]+$

comment $"//".*$

line $[$

$]$

id $[$A$-$Za$-$z$]([$A$-$Za$-$z$0-9])*$

digit $[0-9]$

dec $\{$digit$\}+$

char $\text{'}.\text{'}$

punc $[\backslash (\backslash ),$:;$]$

$\%\%$

$\{$ws$\}\{$ ECHO; $\}$

$\{$comment$\}\{$ ECHO; nextLine$()$; $\}$

$\{$line$\}\{$ ECHO; nextLine$()$; $\}$

$"+"\{$ ECHO; return$($ADDOP$)$; $\}$

$"*"\{$ ECHO; return$($MULOP$)$; $\}$

$"$&$"\{$ ECHO; return$($ANDOP$)$; $\}$

$"<"\{$ ECHO; return$($RELOP$)$; $\}$

$"=>"\{$ ECHO; return$($ARROW$)$; $\}$

begin $\{$ ECHO; return$($BEGIN$\_)$; $\}$

case $\{$ ECHO; return$($CASE$)$; $\}$

character $\{$ ECHO; return$($CHARACTER$)$; $\}$

end $\{$ ECHO; return$($END$)$; $\}$

endswitch $\{$ ECHO; return$($ENDSWITCH$)$; $\}$

function $\{$ ECHO; return$($FUNCTION$)$; $\}$

integer $\{$ ECHO; return$($INTEGER$)$; $\}$

is $\{$ ECHO; return$($IS$)$; $\}$

list $\{$ ECHO; return$($LIST$)$; $\}$

of $\{$ ECHO; return$($OF$)$; $\}$

others $\{$ ECHO; return$($OTHERS$)$; $\}$

returns $\{$ ECHO; return$($RETURNS$)$; $\}$

switch $\{$ ECHO; return$($SWITCH$)$; $\}$

when $\{$ ECHO; return$($WHEN$)$; $\}$

$\{$id$\}\{$ ECHO; return$($IDENTIFIER$)$;$\}$

$\{$dec$\}\{$ ECHO; return$($INT$\_$LITERAL$)$; $\}$

$\{$char$\}\{$ ECHO; return$($CHAR$\_$LITERAL$)$; $\}$

$\{$punc$\}\{$ ECHO; return$($yytext$[0])$; $\}$

$.\{$ ECHO; appendError$($LEXICAL$,$ yytext$)$; $\}$

$\%\%$

int main$()\{$

firstLine$()$;

FILE $*$file $=$ fopen$("$lexemes$.$txt$","$wa$")$;

int token $=$ yylex$()$;

while $($token$)\{$

fprintf$($file$,"\%$d $\%$s

$",$ token, yytext$)$;

token $=$ yylex$()$;

$\}$

lastLine$()$;

fclose$($file$)$;

return $0$;

$\}$

Makefile

# Makefile for CMSC $430$ Project $1$

# Compiler and flags

CXX $=$ g$++$

CXXFLAGS $=-$std$=$c$++11-$Wall $-$g

# Source files

SOURCES $=$ scanner.l

OBJECTS $=$ lex.yy$.$o

# Output executable name

TARGET $=$ compile

# Default target

all: $$($TARGET$)$

# Rule to build the executable

$$($TARGET$)$: $$($OBJECTS$)$

$$($CXX$)$ $$($CXXFLAGS$)-$o $$($TARGET$)$ $$($OBJECTS$)$

# Rule for compiling lex.yy$.$c from scanner.l

lex.yy$.$c: scanner.l

flex scanner.l

# Rule for compiling $.$o files from $.$cc files

$\%.$o: $\%.$cc

$$($CXX$)$ $$($CXXFLAGS$)-$c $$<$

# Clean rule to remove generated files

clean:

rm $-$f $$($TARGET$)$ $$($OBJECTS$)$ lex.yy$.$c

# Phony targets

$.$PHONY: all clean

Output

jeannetteadorante@LAPTOP$-$CIB$2$C$03$C:~$ flex scanner.l

jeannetteadorante@LAPTOP$-$CIB$2$C$03$C:~$ g$++-$std$=$c$++11-$Wall $-$g $-$o compile lex.yy$.$c

lex.yy$.$c:$1274$:$17$: warning: $$void yyunput$($int$,$ char$*)$ defined but not used $[-$Wunused$-$function$]$

$1274|$ static void yyunput $($int c$,$ char $*$ yy$\_$bp $)$

$|^$~~~~~~

$/$usr$/$bin$/$ld: $/$tmp$/$ccPtvBLB$.$o: in function $`$yylex$()\text{'}$:

$/$home$/$jeannetteadorante$/$scanner$.$l:$32$:$(.$text$+0$x$341)$: undefined reference to $`$nextLine$()\text{'}$

$/$usr$/$bin$/$ld: $/$home$/$jeannetteadorante$/$scanner$.$l:$33$:$(.$text$+0$x$375)$: undefined reference to $`$nextLine$()\text{'}$

$/$usr$/$bin$/$ld: $/$home$/$jeannetteadorante$/$scanner$.$l:$58$:$(.$text$+0$x$88$d$)$: undefined reference to $`$appendError$($ErrorCategories$,$ std::$\_\_$cxx$11$::basic$\_$string, std::allocator $>)\text{'}$

$/$usr$/$bin$/$ld: $/$tmp$/$ccPtvBLB$.$o: in function $`$main$\text{'}$:

$/$home$/$jeannetteadorante$/$scanner$.$l:$62$:$(.$text$+0$x$23$fa$)$: undefined reference to $`$firstLine$()\text{'}$

$/$usr$/$bin$/$ld: $/$home$/$jeannetteadorante$/$scanner$.$l:$70$:$(.$text$+0$x$2456)$: undefined reference to $`$lastLine$()\text{'}$

collect$2$: error: ld returned $1$ exit status

jeannetteadorante@LAPTOP$-$CIB$2$C$03$C:~$ flex scanner.l

jeannetteadorante@LAPTOP$-$CIB$2$C$03$C:~$ g$++-$std$=$c$++11-$Wall $-$g $-$o compile lex.yy$.$c

lex.yy$.$c:$1274$:$17$: warning: $$void yyunput$($int$,$ char$*)$ defined but not used $[-$Wunused$-$function$]$

$1274|$ static void yyunput $($int c$,$ char $*$ yy$\_$bp $)$

$|^$~~~~~~

$/$usr$/$bin$/$ld: $/$tmp$/$ccV$5$zBuq.o: in function $`$yylex$()\text{'}$:

$/$home$/$jeannetteadorante$/$scanner$.$l:$32$:$(.$text$+0$x$341)$: undefined reference to $`$nextLine$()\text{'}$

$/$usr$/$bin$/$ld: $/$home$/$jeannetteadorante$/$scanner$.$l:$33$:$(.$text$+0$x$375)$: undefined reference to $`$nextLine$()\text{'}$

$/$usr$/$bin$/$ld: $/$home$/$jeannetteadorante$/$scanner$.$l:$58$:$(.$text$+0$x$88$d$)$: undefined reference to $`$appendError$($ErrorCategories$,$ std::$\_\_$cxx$11$::basic$\_$string, std::allocator $>)\text{'}$

$/$usr$/$bin$/$ld: $/$tmp$/$ccV$5$zBuq.o: in function $`$main$\text{'}$:

$/$home$/$jeannetteadorante$/$scanner$.$l:$62$:$(.$text$+0$x$23$fa$)$: undefined reference to $`$firstLine$()\text{'}$

$/$usr$/$bin$/$ld: $/$home$/$jeannetteadorante$/$scanner$.$l:$70$:$(.$text$+0$x$2456)$: undefined reference to $`$lastLine$()\text{'}$

collect$2$: error: ld returned $1$ exit status

jeannetteadorante@LAPTOP$-$CIB$2$C$03$C:~$ $--$config gcc

$--$config: command not found