undefined reference to 'nanosleep'

[Ralf Corsepius]

On Wed, 2007-09-12 at 14:26 +0100, André Neves wrote:
> First of all sorry for forgetting the subject.
> Bah, not helpful. >_<
> 
> On Wed, September 12, 2007 13:48, Ralf Corsepius wrote:
> > On Wed, 2007-09-12 at 12:20 +0100, André Neves wrote:
> >> Hi all.
> >>
> >> I cave in and admit that the system outsmarted me.
> >> Here goes newbie question. :)
> >> Compiling RTEMS for a LEON2 simulator in a Linux (Ubuntu 7.04) machine.
> >> autoconf 2.61, automake 1.10, gcc 4,1,2.
> >>
> >> I'm in the last step of the compilation described in the wiki's Quick
> >> Start:
> >> > cd rtems
> >> > export PATH=/opt/rtems-4.8/bin:$PATH
> >> > ./bootstrap
> >> > cd ..
> >> > mkdir b-sis
> >> > cd b-sis
> >> > ../rtems/configure
> >
> >> --target=sparc-rtems
> >            ^^^^^^^^^^^
> > This must match with the target you used to build your toolchain.
> >
> >>  --enable-rtemsbsp=sis
> >> --enable-tests=samples --disable-posix --disable-itron
> >> > make
> >>
> >> Doing 'make all'.
> >> > (...)
> >> > Making all in capture
> >> > make[5]: Entering directory
> >> `/home/ac-neves/workdir/sparc-rtems/c/leon2/testsuites/samples/capture'
> >> > sparc-rtems-gcc -B../../../../../leon2/lib/ -specs bsp_specs -qrtems
> > ^^^^^^ ^^^^^^^^^^^^
> >
> > OK, so you, for reason being incomprehensible to me used
> > --target=sparc-rtems
> 
> The wiki Quick Start page said to use
> --target=sparc-rtems4.8
> 
> It was making some part of my compilation fail, and my internship tutor
> had a look at it and said that probably dropping the "4.8" would make it
> work.
He is wrong.

>  So i used
> --target=sparc-rtems
> instead, to see if that would solve the problem.
It doesn't. All that matters is always using an identical --target and
the same --prefix, in all configurations, binutils, gcc+newlib and RTEMS
itself.

The official recommendation is "sparc-rtems4.8".

> It did, and so i went and edited the wiki accordingly.
Which wiki did you edit?

> If i did wrong, please edit it back into the correct option·
> 
> (Low) personal experience says the right option is the one I used, expert
> says what I used makes no sense.
> Hmm... I don't know what should be there. I know no other option. :)
> 
> >
> >> -mcpu=cypress -msoft-float -O2 -g      -o capture.exe init.o test1.o
> >> > ../../../../../leon2/lib/librtemscpu.a(libposix_a-usleep.o): In
> >> function
> >> `usleep':
> >> > /home/ac-neves/workdir/sparc-rtems/c/leon2/cpukit/posix/../../../../../../rtems-leon2/c/src/../../cpukit/posix/src/usleep.c:29:
> >> undefined reference to `nanosleep'
> >> > collect2: ld returned 1 exit status
> >> > make[5]: *** [capture.exe] Error 1
> >> > make[5]: Leaving directory
> >> `/home/ac-neves/workdir/sparc-rtems/c/leon2/testsuites/samples/capture'
> >> > (...)
> >>
> >> I've been trying to fix it myself, but failed to understand how
> >> everything
> >> is well except for nanosleep.
> >> Can something not have been included properly?
> > Have you build newlib?

> Hmm... libnewlib-dev was missing.
Where would this come from? There is no libnewlib-dev which would be
relevant for RTEMS.

You need to build sparc-rtems4.8-newlib when building
sparc-rtems4.8-gcc.

> (Like libc-dev was missing, and manpages-dev was missing. o_O I'm starting
> to dislike this Kubuntu.)
Switch to fedora and you can use the pre-packaged binaries ;) [1]

Ralf

[1] OK, this remark wasn't quite fair, I am biased ;)