popt, ELDK 2.0.2

popt, ELDK 2.0.2

[robdlg]

I was experimenting with the popt library in the ELDK 2.0.2, and I received
the following errors.  The same compiler invocation is successful when used
with gcc under Red Hat Linux 7.3.  The source code follows the error
messages.  How do I properly compile and link this file?

ppc_82xx-gcc -Wall -lpopt -o popt_test main.c
/tmp/ccMrZmW2.o: In function `main':
/tmp/ccMrZmW2.o(.text+0x60): undefined reference to `poptGetContext'
/tmp/ccMrZmW2.o(.text+0x60): relocation truncated to fit: R_PPC_REL24
poptGetContext
/tmp/ccMrZmW2.o(.text+0x70): undefined reference to `poptGetNextOpt'
/tmp/ccMrZmW2.o(.text+0x70): relocation truncated to fit: R_PPC_REL24
poptGetNextOpt
/tmp/ccMrZmW2.o(.text+0x94): undefined reference to `poptFreeContext'
/tmp/ccMrZmW2.o(.text+0x94): relocation truncated to fit: R_PPC_REL24
poptFreeContext
collect2: ld returned 1 exit status
make: *** [all] Error 1

#include <stdio.h>
#include <stdlib.h>
#include <popt.h>

int main(int argc, char *argv[])
{
	int rc;

	/* command-line arguments */
	struct poptOption options[] = {
		{ "help", 'h', POPT_ARG_NONE, NULL, 1 },
		{ NULL, 0, 0, NULL, 0 }
	};
	poptContext context;

	context = poptGetContext(NULL, argc, (const char **)argv, options,
0);
	rc = poptGetNextOpt( context );

	printf("%d\n", rc);

	poptFreeContext( context);

	return 0;
}

/* eof */

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Re: popt, ELDK 2.0.2

[Wolfgang Denk]

In message <200310061051.FAA10075@lists.linuxppc.org> you wrote:
>
> I was experimenting with the popt library in the ELDK 2.0.2, and I received
> the following errors.  The same compiler invocation is successful when used
> with gcc under Red Hat Linux 7.3.  The source code follows the error
> messages.  How do I properly compile and link this file?
>
> ppc_82xx-gcc -Wall -lpopt -o popt_test main.c

You must specify the linked objects in the correct order. This  means
(among  other  things)  that  you have to put the libraries AFTER the
object files that have references to symbols provided by these libs.

Try:

	ppc_82xx-gcc -Wall -o popt_test main.c -lpopt

And RTFM.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
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