[ python-Bugs-1379984 ] HP-UX: Can't shl_load() a library containing Thread Local

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Bugs item #1379984, was opened at 2005-12-14 00:20
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Category: Threads
Group: Platform-specific
Status: Open
Resolution: None
Priority: 5
Submitted By: Blade (blade_doyle)
Assigned to: Nobody/Anonymous (nobody)
Summary: HP-UX: Can't shl_load() a library containing Thread Local

Initial Comment:
HP-UX runtime loader does not support dynamic load of
shared libraries that contain (TLS) thread local
storage.  As a result, when attempting to import
modules that contain TLS the following error is reported:

"/usr/lib/dld.sl: Can't shl_load() a library containing
Thread Local Storage"

This problem was discussed previously on the python.org
mail list:

http://mail.python.org/pipermail/python-list/2003-May/164024.html

There is another option:  Use LD_PRELOAD environment
variable to cuase the runtime loader to 'pre-load' the
pthreads library (and dependancies of the pthread
library).  See the dld.sl(5) man page for more info on
LD_PRELOAD.

But, I think a 5th option is ideal.  If libpthread.sl
(and the dependancies of libpthread) are linked into
the python executable at build time then all of these
problems are avoided.  I suggest that the HP-UX
(includes hp-ux on ia64) build process be modified so
that libpthead (and depends) are linked in.  Or, at
least, make a note of this problem/solution in the
HP-UX section of the README file distributed with
python source.

Here is the process I use to work around the TLS problem:

HP-UX:
bash$ BASECFLAGS="-DTHREAD_STACK_SIZE=0x50000"; export
BASECFLAGS
bash$ ./configure --without-gcc --enable-shared
--with-libs='-lpthread -lstd_v2 -lCsup_v2 -lcl'
bash$ **Edit the Makefile and remove -O from the OPT line.
bash$ make
bash$ make test
bash$ make install

HP-UX on ia64:
bash$ CC=cc; export CC
bash$ CXX=aCC; export CXX
bash$ BASECFLAGS="+DD64 -DTHREAD_STACK_SIZE=0x50000";
export BASECFLAGS
bash$ LDFLAGS="+DD64"; export LDFLAGS
bash$ ./configure --without-gcc --enable-shared
--with-libs="-lpthread -lCsup -lstd_v2 -lunwind"
bash$ unset CC
bash$ unset CXX
bash$ unset BASECFLAGS
bash$ unset LDFLAGS
bash$ **Edit the Makefile and remove -O from the OPT line.
bash$ make
bash$ make test
bash$ make install




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