Give a makefile (doesn't have to be a separate file - just what the contents would be) that would generate the application described below. Be sure each generated file has its own rule.
The first tool is flex, which takes a file called spec.l and generates a file called lex.yy.c. Another tool called bison expects a file calledspec.y and will generate the file spec.tab.c. If bison is called using the directives -vd, it will also generate a file called spec.tab.h (which is needed when compiling lex.yy.c). The two C files can be compiled into object files and then linked together with the yacc (-ly) and lex (-ll) libraries to generate the compiler (a.out.
The makefile you describe must generate the following commands if you were starting just with spec.l and spec.y:
bison -vd spec.y
gcc -c lex.yy.c
gcc -c spec.tab.c
gcc spec.tab.o lex.yy.o -ly -ll