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AW: undefined reference to `__impure_ptr' during linking test
- From: "Neundorf, Alexander" <Alexander dot Neundorf at jenoptik dot com>
- To: "Marc Michalewicz" <marc dot michalewicz at pixy dot ch>, "ecos-devel" <ecos-devel at sources dot redhat dot com>
- Date: Wed, 1 Jun 2005 10:33:13 +0200
- Subject: AW: undefined reference to `__impure_ptr' during linking test
Hi,
> Von: ecos-devel-owner@sources.redhat.com
>
> Hello again !
>
> puhh, I am getting closer to my first kernel - i think and hope.
> So, now I succees in building a library, but when trying to link tests
> I am getting now strange messages about undefined refernence:
>
> "
> /usr/share/gnuh8300_v0501_elf-1/lib/gcc/h8300-elf/3.4-GNUH8_v0
> 501/../../../../h8300-elf/lib/h8300s/int32/libsupc++.a(vtermin
> ate.o)(.text+0xca): In function `.L2':
> : undefined reference to `__impure_ptr'
> "
>
> It is only this "impure_ptr", and only in "vterminate.o" nothing else
> which is not found.
>
> Did anybody experience this before and has a solution ?
I'm using gcc 3.4.1 and I think I had the same problem. Since then I compile and link the following reent.c, taken from newlib:
---------8<-----------8<---------------8<----------------
#if (__GNUC__ == 3) && (__GNUC_MINOR__ == 4)
#include <reent.h>
/* Note that there is a copy of this in sys/reent.h. */
#ifndef __ATTRIBUTE_IMPURE_PTR__
#define __ATTRIBUTE_IMPURE_PTR__
#endif
#ifndef __ATTRIBUTE_IMPURE_DATA__
#define __ATTRIBUTE_IMPURE_DATA__
#endif
static struct _reent __ATTRIBUTE_IMPURE_DATA__ impure_data = _REENT_INIT (impure_data);
struct _reent *__ATTRIBUTE_IMPURE_PTR__ _impure_ptr = &impure_data;
#endif
---------8<-----------8<---------------8<----------------
Seems to work.
Alex