Cannot run the code and get output

[Shakib1126]

when I try to run the makefile using the "make" command I get the following error. (I am only running pp1 that is the lexical analyzer / Scanner)

g++ -g -Wall -Wno-unused -Wno-sign-compare   -c -o lex.yy.o lex.yy.c 
 scanner.l: In function 'void InitScanner()':
scanner.l:166:5: error: 'yy_flex_debug' was not declared in this scope    yy_flex_debug = IsDebugOn("lex");                                                                                                                                                                                     make: *** [lex.yy.o] Error 1  

Can someone provide how do I run this code for scanner.