id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
77	config needed for AIX - gcc	cpqlvc	John Maddock	"{{{
It looks like Boost.Threads is not configured 
for the platform / compiler combination AIX / gcc.  
I'm trying to compile Boost.Threads on a RS/6000 box 
running AIX 4.3 under gcc 2.95.3.  On my first attempt 
to compile condition.cpp, I got the following error 
message:

(27_0/libs/thread/src)$ g++ -g -Wall -W -c -I../../.. 
condition.cpp
In file included from ../../../boost/limits.hpp:15,
                 from condition.cpp:16:
../../../boost/detail/limits.hpp:55: #error The file 
boost/detail/limits.hpp needs to be set up for your 
CPU type.
(27_0/libs/thread/src)$ 

Above the #error is a #ifndef that tests for 
the definition of several macros.  Under g++ 
__powerpc__ is not defined, but _POWER is; so, I added 
a defined(_POWER) to the list of conditions.

The next problem that I ran into is that 
select_platform_config.hpp only includes aix.hpp if 
__IBMCPP__ is defined.  This macro is not defined 
under g++.  As a temporary hack I defined this macro 
on the command line.  Fortunately the series of #elif 
in select_compiler_config.hpp selected gcc.hpp, so I 
got the right platform (aix.hpp) and compiler 
(gcc.hpp).

aix.hh #define's BOOST_HAS_PTHREAD_YIELD.  In 
thread.cpp thread::yield() this causes  pthread_yield
() to be invoked.  Unfortunately (for 
me) /usr/include/pthread.h looks like 

#ifdef _AIX_PTHREADS_D7
extern void
pthread_yield __((void));
#endif

and _AIX_PTHREADS_D7 is not defined.  To workaround 
this problem I defined BOOST_HAS_SCHED_YIELD on the 
command line.

I don't know whether my little workarounds / command 
line hacks are correct.  By documenting this problem 
I'm hoping that Boost.Threads will be updated to 
support AIX / gcc.

Thanks,

Doug

}}}"	Bugs	closed		config	None		Fixed