Thread: Makefile question

  1. 10-16-2008 #1
    -EquinoX-
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    Makefile question

    Ok, first of all here's my code:

    Code:
    CC = gcc
CFLAGS = -g

CFILES = main.c lex.yy.c y.tab.c util.c

OFILES = main.o lex.yy.o y.tab.o util.o

HFILES = y.tab.h globals.h util.h scan.h

compile: $(OFILES)
	$(CC) $(CFLAGS) $(OFILES) -lfl -o compile

y.tab.c : parse.y util.h scan.h
	yacc -v -d parse.y

lex.yy.c : scan.l y.tab.h globals.h
	flex scan.l

y.tab.h : parse.y util.h scan.h 
	yacc -v -d parse.y

clean:
	/bin/rm -f compile lex.yy.c y.tab.c y.tab.h *.BAK *.o
    I think there's something wrong as when I run make it can't found the function which is defined in util.c and global.h

    The file scan.l is using an extern variable which is defined in the globals.h file, and I've already included globals.h on the header of scan.l.


    Can you tell me what's wrong here?
    Last edited by -EquinoX-; 10-16-2008 at 11:48 AM.
  2. 10-16-2008 #2
    AvaGodess
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    Aww Equinox, sounds like a name from an Album of Eric Jordan, are u a fan?
  3. 10-16-2008 #3
    -EquinoX-
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    Quote Originally Posted by AvaGodess View Post
    Aww Equinox, sounds like a name from an Album of Eric Jordan, are u a fan?
    no I am not
  4. 10-16-2008 #4
    tabstop
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    If the function is in util.c, then you should probably compile util.c at some point along the way. (Including util.h as a requirement doesn't help -- you need util.o in your OFILES, I would guess.)
  5. 10-16-2008 #5
    Salem
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    I don't see util.c / util.o listed anywhere, so how would it know to compile and link them?
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
  6. 10-16-2008 #6
    -EquinoX-
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    okay, I already edited my first post and edited it also in my code, however it still fails.
  7. 10-16-2008 #7
    master5001
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    Are your getting a compiler error or a linker error? In otherwords, are you not putting prototypes, or are your prototypes (or lack thereof) mismatching what the file actually contains?
  8. 10-16-2008 #8
    Salem
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    Maybe post the log of make clean followed by make
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
  9. 10-16-2008 #9
    -EquinoX-
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    here's a part of the error, mostly it's a linker error I think

    Code:
    /home/-/<stdout>:692: multiple definition of `yyin'
lex.yy.o:/home/-/lex.yy.c:692: first defined here
scan.o: In function `yylex':
/home/-/<stdout>:692: multiple definition of `yyout'
lex.yy.o:/-/lex.yy.c:692: first defined here
scan.o:(.data+0x0): multiple definition of `yylineno'
lex.yy.o:(.data+0x0): first defined here
scan.o: In function `yylex':
/home/-/<stdout>:704: multiple definition of `yy_flex_debug'
lex.yy.o:/home/-/lex.yy.c:704: first defined here
scan.o: In function `yylex':
/home/-/<stdout>:692: multiple definition of `yylex'
lex.yy.o:/home/herlamba/cs453/ass3/C-/lex.yy.c:692: first defined here
scan.o: In function `yy_create_buffer':
/home/-/<stdout>:1516: multiple definition of `yy_create_buffer'
lex.yy.o:/-/lex.yy.c:1516: first defined here
scan.o: In function `yyrestart':
/home/-/<stdout>:1454: multiple definition of `yyrestart'
lex.yy.o:/home/-/lex.yy.c:1454: first defined here
scan.o: In function `yyrealloc':
  10. 10-16-2008 #10
    master5001
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    Code:
    make clean
make all
  11. 10-16-2008 #11
    -EquinoX-
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    I did make clean and make all, still the same thing
  12. 10-16-2008 #12
    -EquinoX-
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    some additional info:

    /home/-/parse.y:219: undefined reference to `newStmtNode'
    /home/-/parse.y:220: undefined reference to `newStmtNode'
    /home/-/parse.y:228: undefined reference to `newStmtNode'
    /home/-/parse.y:233: undefined reference to `newStmtNode'
    /home/-/parse.y:240: undefined reference to `newStmtNode'

    where newStmtNode is a function in util.c and I already include util.h on the header of parse.y, why can't it find that function saying it's an undefined reference
  13. 10-16-2008 #13
    master5001
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    Do your prototypes jive with how they are defined?
  14. 10-16-2008 #14
    -EquinoX-
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    Quote Originally Posted by master5001 View Post
    Do your prototypes jive with how they are defined?
    What do you mean by prototypes jive?
  15. 10-16-2008 #15
    -EquinoX-
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    here's the header of each file

    scan.l:

    Code:
    #include "globals.h"   
#include "util.h"   
#include "y.tab.h"
    util.c
    Code:
    #include "globals.h"   
#include "util.h"   
#include "y.tab.h"
    parser.y
    Code:
    #include "globals.h"   
#include "util.h"   
#include "scan.h"
    all the other .h file of course doesn't include anything
    Last edited by -EquinoX-; 10-16-2008 at 12:24 PM.
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