This is the mail archive of the
gcc-help@gcc.gnu.org
mailing list for the GCC project.
multiple function definition (was: RE: Use +z or +Z to recompile...)
[ please start a new thread with an appropriate subject line instead
of replying to other random messages ]
>>>>> "Nagu" == Nagu <thogiti@usc.edu> writes:
Nagu> Hi all, I have this problem of linking error using gcc, I
Nagu> have 4 simple files first.c (where main function is
Nagu> defined), and myfunc1, myfunc2 and incl.h (which defines
Nagu> another function called basefunc). When I compile, I get
Nagu> fatal error saying that multiply defined "basefunc". How to
Nagu> get rid of this? Thanks Best nagu
This question is not really a GCC question - it's more a C programming
question. Anyway, you just shouldn't define functions in header files
(except for inline functions). The usual modus operandi is something
like this:
,----[ foo.h ]
| #ifndef FOO_H
| #define FOO_H
|
| int bar (int);
|
| #endif /* FOO_H */
`----
,----[ foo.c ]
| #include "foo.h"
|
| int bar (int x) {
| return (x * x);
| }
`----
,----[ main.cc ]
| #include "foo.h"
|
| int main () {
| bar (3);
| return 0;
| }
`----
I suggest that you read a good book about programming. Have a look at
http://www.advancedlinuxprogramming.com/. Don't be afraid reading a
book titled "advanced" programming, it just starts with the basics and
is not only applicable for linux.
HTH
--
Claudio Bley ASCII ribbon campaign (")
Debian GNU/Linux advocate - against HTML email X
http://www.cs.uni-magdeburg.de/~bley/ & vCards / \