Issue 1465838: HP-UX11i: illegal combination of compilation and link flags (original) (raw)

Issue1465838

Created on 2006-04-06 16:53 by rwgk, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (7)
msg60899 - (view)	Author: Ralf W. Grosse-Kunstleve (rwgk)	Date: 2006-04-06 16:53
According to Boris Gubenko from the HP-UX compiler development team, it is illegal to link with -lpthread if the sources are not compiled with -mt. However, this is exactly what happens during Python installation, e.g.: cc -Ae -c -DNDEBUG -O -I. -I./Include -DPy_BUILD_CORE -o Python/compile.o Python/compile.c ... aCC -Wl,-E -Wl,+s -o python \ Modules/python.o \ libpython2.5.a -lnsl -lrt -ldld -ldl -lpthread -lm This illegal combination of compilation and link flags eventually results in obscure runtime failures (segfault, abort) while running Boost.Python C++ extensions. These failures go away if Python is installed with, e.g.: env CXX="aCC -mt" BASECFLAGS="-mt" ./configure --without-gcc I suggest changing the configure/make files to always include "-mt" if threading is enabled. BTW: The same issue already exists for Python 2.4. Cheers, Ralf
msg60900 - (view)	Author: Anthony Baxter (anthonybaxter)	Date: 2006-04-09 15:30
Logged In: YES user_id=29957 Hm. We need to detect if we're on HP/UX, of course. Is this option for all versions? And I assume it's only for the HP compiler, not gcc?
msg60901 - (view)	Author: Ralf W. Grosse-Kunstleve (rwgk)	Date: 2006-04-10 19:44
Logged In: YES user_id=71407 > Hm. We need to detect if we're on HP/UX, of course. Is > this option for all versions? I guess so since it seems very fundamental, but I am not sure. I alerted Boris Gubenko to this problem report. I hope he will help out. > And I assume it's only for the HP compiler, not gcc? I don't know. I imagine gcc has similar issues since it does link with the same -lpthread eventually. Note that the machine I used is publically accessible: http://www.testdrive.hp.com/ After you register on the web: telnet td176.testdrive.hp.com gcc 3.4.3 is installed.
msg60902 - (view)	Author: Ralf W. Grosse-Kunstleve (rwgk)	Date: 2006-04-10 23:58
Logged In: YES user_id=71407 Boris Gubenko from HP provides this information: Hi Ralf, the -mt option sets -lpthread link option and defines various macros related to multithreading, including _REENTRANT macro. It must be specified when compiling/linking a multithreaded application. The -mt option is supported in latest aCC compilers, including the aCC V6 compiler (available on IA64 only). I'm not sure if -mt is supported in old aCC V3 compiler available on PA-RISC only, but since Python cannot be compiled with this compiler, this question is, probably, moot. If configuration script wants to be selective about the aCC compiler version, it can check __HP_aCC macro predefined by the compiler and apply '-mt' if __HP_aCC >= 60000. As for the gnu compiler, I think, that the equivalent of '-mt' would be '-pthreads' (for cxx on Tru64, it would be '-pthread'). I don't know how to reply to the post on Python forum you've referred me to. I guess, I'd need to register for an account. I can do it if you want me to. Or you can just post it on my behalf. Thanks, Boris ----- Original Message ----- From: "Ralf W. Grosse-Kunstleve" <rwgk@yahoo.com> To: <Boris.Gubenko@hp.com> Cc: <rwgk@yahoo.com> Sent: Sunday, April 09, 2006 2:11 PM Subject: HP-UX Python configure Hi Boris, Could you please help out here? https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1465838&group_id=5470 Especially with this question: "Is this option for all versions?" Thank you in advance! Cheers, Ralf
msg114589 - (view)	Author: Georg Brandl (georg.brandl) *	Date: 2010-08-21 22:51
Is this still relevant?
msg114593 - (view)	Author: Ralf W. Grosse-Kunstleve (rwgk)	Date: 2010-08-21 22:58
I've no access to HP machines anymore. It's probably not worth anybody's time. Ralf
msg114597 - (view)	Author: Georg Brandl (georg.brandl) *	Date: 2010-08-21 23:05
OK, closing.