Thread: Getting started (n00b)

  1. #16
    TsunUntan
    Guest
    What LynuxPenguin was refering to was the fact that on Linux systems in the /usr/include directory, the gcc compiler includes all the standard header files into the program by default so if you miss a header file or find an undeclared function gcc checks the directory for the header file you wished to include, otherwise you need to include it directly or tell gcc where it is ex:

    gcc -lcrypt myencryption.c
    or
    #include <crypt.h>

    should work, although im not sure, but I read this somewhere, let me know ok?

  2. #17
    End Of Line Hammer's Avatar
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    If you miss a header file, your compiler should warn you by saying something like:
    >implicit declaration of function ...

    Generally, it isn't good practive to work like this though.
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  3. #18
    Registered User
    Join Date
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    Originally posted by Hammer
    If you miss a header file, your compiler should warn you by saying something like:
    >implicit declaration of function ...

    Generally, it isn't good practive to work like this though.
    That's what I thought, but I doubted it would even compile. Just installed RH8.0 so I have had a chance to see if gcc 3 does. Doesn't seem like a real good idea though.

  4. #19
    LynuxPenguin
    Guest
    in my opnion you should always include the headers you want to use.

    Less work for the compiler, though I could be wrong oh also
    I ususally like to do
    gcc -o myname -Wall myprog.c
    so you can see a more definite error listing when it compiles

  5. #20
    Comment your source code! Lynux-Penguin's Avatar
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    oops forgot the - in my name

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