Messages in this thread |  | | Date | Mon, 23 Aug 2004 10:10:16 -0400 | | From | Lei Yang <> | | Subject | Re: Problems compiling kernel modules |
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Hi friends,
I've askeed questions about errors compiling kernel modules caused by including <stdio.h> and got some very helpful info here.
I changed those I/O stream and file operation in the code and get the module compiled, however, there would be warnings like
In file included from /home/lei/modules/test.c:49: /home/lei/modules/Kcomp.h:21: warning: function declaration isn't a prototype /home/lei/modules/Kcomp.h:27: warning: function declaration isn't a prototype /home/lei/modules/Kcomp.h:69: warning: function declaration isn't a prototype
And the no prototype fuction looks like
int preset() // with no arguments { p = &nodes[0][0]; return 0; }
So when I tried to install the module with insmod ./test.ko , there would be an error,
insmod: error inserting './test.ko': -1 Unknown symbol in module
Could anyone tell me what is wrong here? Is that because of the no prototype function declaration?
TIA Lei
Lee Revell wrote: > On Sat, 2004-08-21 at 16:46, Lei Yang wrote: > >>What about multi-file module? >> >>Say test.c doesn't include stdio.h, while there is some other .c file >>which is to be compiled and linked into test.ko, include stdio? >> >>Would that work? >> > > > Are you just trying to print from a kernel module? Use printk. > > The kernel does not really have its own standard input and standard > output - the kernel manages those things for processes. > > Lee > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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