Re: python2.2 and pthreads

[James A. Morrison]

On Fri, 2003-04-25 at 06:53, Michael Banck wrote:
> Hi,
> 
> I am trying to build python2.2 with pthreads. There are two problems:

 I think you need to alter configure.ac .
 
> 1. configure does not find pthreads and selects cthreads:

 I believe this is because python checks for cthreads first,
then checks for pthreads, switch the order and see how it works.

Jim

I might be wrong, this is just from memory.
 
> /* Define if you have POSIX threads */
> /* #undef _POSIX_THREADS */
> [...]
> /* Define if you have the Mach cthreads package */
> #define C_THREADS 1
> 
> It seems the configure-test code is:
> 
>     # According to the POSIX spec, a pthreads implementation must
>     # define _POSIX_THREADS in unistd.h. Some apparently don't (which
>     # ones?)
>     echo $ac_n "checking for _POSIX_THREADS in unistd.h""... $ac_c" 1>&6
> echo "configure:3731: checking for _POSIX_THREADS in unistd.h" >&5
>     cat > conftest.$ac_ext <<EOF
> #line 3733 "configure"
> #include "confdefs.h"
> #include <unistd.h>
> #ifdef _POSIX_THREADS
> yes
> #endif
> 
> Is this our problem or python's? This test succeeds on Linux. 
> 
> When I override pyconfig.h manually and add -lpthread to $LIBS, python
> compiles fine, but:
> 
> 2. There is an assertion failure when trying to run the python
> executable:
> 
> hurd:~/build/python2.2-2.2.2/builddir.old$ ./python
> python: ../../libpthread/pthread/pt-self.c:28: pthread_self: Assertion
>       `__pthread_threads' failed.
> Aborted
> hurd:~/build/python2.2-2.2.2/builddir.old$
> 
> (gdb) r -E ../setup.py build
> Starting program: /var/lib/buildd/build/mbanck/python2.2-2.2.2/builddir/ \
>       /python -E ../setup.py build
> 
> Breakpoint 2, PyThread_get_thread_ident () at ../Python/thread_pthread.h:237
> 237             if (!initialized)
> (gdb) n
> 240             threadid = pthread_self();
> (gdb) n
> python: ../../libpthread/pthread/pt-self.c:28: pthread_self: Assertion 
>       `__pthread_threads' failed.
> 
> Program received signal SIGABRT, Aborted.
> 0x011288dc in evc_wait () from /lib/libc.so.0.3
> (gdb) bt
> #0  0x011288dc in evc_wait () from /lib/libc.so.0.3
> #1  0x01128f39 in mach_msg () from /lib/libc.so.0.3
> #2  0x01297501 in msg_sig_post () from /lib/libhurduser.so.0.3
> #3  0x0115dbbc in sigprocmask () from /lib/libc.so.0.3
> #4  0x0115dd22 in sigprocmask () from /lib/libc.so.0.3
> #5  0x0115e020 in kill () from /lib/libc.so.0.3
> #6  0x0115d4ce in raise () from /lib/libc.so.0.3
> #7  0x0115f5f7 in abort () from /lib/libc.so.0.3
> #8  0x01156dc4 in __assert_perror_fail () from /lib/libc.so.0.3
> #9  0x010318ab in pthread_self () from /lib/libpthread.so.0.3
> #10 0x0809f93b in PyThread_get_thread_ident () at 
>       ../Python/thread_pthread.h:240
> #11 0x08093119 in PyImport_Import (module_name=0x8112c68) at 
>       ../Python/import.c:155
> #12 0x08093666 in PyImport_ImportModule (name=0x80e24c0 "__builtin__") at 
>       ../Python/import.c:1619
> #13 0x08072289 in _PyExc_Init () at ../Python/exceptions.c:1096
> #14 0x0809ae9f in Py_Initialize () at ../Python/pythonrun.c:163
> #15 0x08053031 in Py_Main (argc=4, argv=0x12bff2c) at ../Modules/main.c:322
> #16 0x08052ceb in main (argc=4, argv=0x12bff2c) at ../Modules/python.c:10
> #17 0x0114b5bf in __libc_start_main () from /lib/libc.so.0.3
> 
> 
> Michael
> 
> 
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