uClibc compilation error with nommu

[Michael Unterkalmsteiner]

On Tuesday 10 March 2009 00.32.40 Khem Raj wrote:
> On Mon, Mar 9, 2009 at 4:01 PM, Michael Unterkalmsteiner <miciu at gmx.de> 
wrote:
> > Hi,
> > I'd like to build a toolchain for mips with nommu (using
> > buildroot-2009.02 and uClibc-0.9.30). I get the following error:
> >
> > [...]
> >  CC libc/stdio/tmpnam.o
> >  CC libc/stdio/tmpnam_r.o
> >  CC libc/stdio/popen.o
> > libc/stdio/popen.c:45: error: 'fork' undeclared here (not in a function)
> > libc/stdio/popen.c:45: warning: type defaults to 'int' in declaration of
> > 'fork'
> > libc/stdio/popen.c: In function 'popen':
> > libc/stdio/popen.c:100: error: called object 'fork' is not a function
> > [...]
> >
> > The problematic part in popen.c is:
> >
> > [...]
> > /* uClinux-2.0 has vfork, but Linux 2.0 doesn't */
>
> You should check if you are using right kernel headers while building
> uclibc.

Since I'm using buildroot I guess the kernel headers configured there are used:
BR2_KERNEL_HEADERS_2_6_28=y
BR2_DEFAULT_KERNEL_HEADERS="2.6.28.4"

Thanks,
Michael