2013/12/13 JonY <[email protected]>
> On 12/13/2013 22:12, Ruben Van Boxem wrote:
> > Hi,
> >
> > I remember from a long time ago that we fixed this in the beginnings of
> GCC
> > posix threading, but it popped up again when I was working on a fresh set
> > of build scripts to replace the old cruft I wrote and used for a couple
> of
> > years.
> >
> > Basic steps is this:
> > 1. headers+binutils
> > 2. GCC C (no libgcc), --enable-threads=posix
> > 3. CRT
> > 4. winpthreads -> fails:
> > libtool: link: i686-w64-mingw32-gcc -shared
> > src/.libs/libwinpthread_la-barrier.o src/.libs/libwinpthread_la-cond.o
> > src/.libs/libwinpthread_la-misc.o src/.libs/libwinpthread_la-mutex.o
> > src/.libs/libwinpthread_la-rwlock.o src/.libs/libwinpthread_la-spinlock.o
> > src/.libs/libwinpthread_la-thread.o src/.libs/libwinpthread_la-ref.o
> > src/.libs/libwinpthread_la-sem.o src/.libs/libwinpthread_la-sched.o
> > src/.libs/libwinpthread_la-clock.o src/.libs/libwinpthread_la-nanosleep.o
> > src/.libs/version.o -L./fakelib -O2 -o .libs/libwinpthread-1.dll
> > -Wl,--enable-auto-image-base -Xlinker --out-implib -Xlinker
> > .libs/libwinpthread.dll.a
> >
> /home/ruben/cross/build/x86_64-unknown-linux-gnu/mingw32/mingw32/lib/gcc/i686-w64-mingw32/4.8.2/../../../../i686-w64-mingw32/bin/ld:
> > cannot find -lpthread
> > collect2: error: ld returned 1 exit status
> >
> > Versions used:
> > binutils 2.24
> > MinGW-w64 v3.0.0
> > GCC 4.8.2
> >
> > Winpthreads configured with:
> > --host=$target --build=$build --prefix=$prefix/$target --enable-shared
> > --enable-static
> >
> > It seems all the right executables are being called, but a -nodefaultlibs
> > is missing or something.
> >
> > Any ideas? Thanks!
> >
>
> pthread is linked in implicitly when using --enable-threads=posix, you
> can workaround this by introducing a dummy/empty libpthread.a before
> building winpthreads, this is a way to bootstrap out of the chicken and
> egg problem.
>
> Alternatively, you can build static pthreads first, but I don't
> recommend it if you want to use libgcc dll, since you will end up with
> multiple instances at runtime with static linking, not to mention,
> harder to update.
>
Hmm, I thought this should've worked. I'll just copy libuser32.a to
libpthread.a before building winpthreads.
Cheers,
Ruben
>
>
>
>
>
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