using a makefile / gdb info

This is a discussion on using a makefile / gdb info within the C Programming forums, part of the General Programming Boards category; I've been writing my code in the Unix environment compiling with gcc and using gdb for debugging. I'm having problems ...

  1. #1
    Registered User dinjas's Avatar
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    using a makefile / gdb info

    I've been writing my code in the Unix environment compiling with gcc and using gdb for debugging. I'm having problems with the - g option with gcc when I'm using a makefile. Consider the following makefile:
    Code:
    rbtree:main.o insert.o delete.o
            gcc -lm -g -o rbtree main.o insert.o delete.o
    
    main.o:main.c
            gcc -c main.c -o main.o
    
    delete.o:delete.c
            gcc -c delete.c -o delete.o
    
    insert.o:insert.c
            gcc -c insert.c -o insert.o
    
    clean:
            rm -f core *.o rbtree
    My program compiles fine, but when I run gdb to debug, there is no line number information in the file. ??? I can compile from the command line and all is well, but I'd like to be able to use the makefile. Anybody see anything terribly wrong that I'm doing. (i realize that I don't need the
    Code:
     gcc -c delete.c -o delete.o
    for each target after rbtree, but is there anything else? Thanks,
    jason
    straight off the heap

  2. #2
    & the hat of GPL slaying Thantos's Avatar
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    You need to compile the source code with the -g option. Right now you only have it at the link stage. Put -g with every source file

  3. #3
    Registered User dinjas's Avatar
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    Thanks, that did the trick.
    straight off the heap

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