[Boost-bugs] [Boost C++ Libraries] #2263: On PA-RISC with GCC 4.3.1, thread primitives are misdetected

Subject: [Boost-bugs] [Boost C++ Libraries] #2263: On PA-RISC with GCC 4.3.1, thread primitives are misdetected
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2008-08-27 09:42:09

#2263: On PA-RISC with GCC 4.3.1, thread primitives are misdetected
---------------------------------+------------------------------------------
 Reporter:  river_at_[hidden]  |        Type:  Bugs        
   Status:  new                  |   Milestone:  Boost 1.37.0
Component:  None                 |     Version:  Boost 1.36.0
 Severity:  Problem              |    Keywords:              
---------------------------------+------------------------------------------
 In at least two places (boost/detail/spinlock.hpp and
 boost/detail/atomic_count.hpp), Boost assumes that if the following
 condition is true:

 defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 )

 then GCC sync primitives (e.g. __sync_lock_test_and_set,
 __sync_fetch_and_add) are available.  This is not correct; GCC 4.3.1 on
 PA-RISC does not provide these operations.  The following link error
 results:

 /usr/ccs/bin/ld: Unsatisfied symbols:
    __sync_add_and_fetch_4 (first referenced in main.o) (code)

 The test can be fixed like this:

 defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) &&
 !defined(__hppa)

 However, it seems like it would be more resiliant to list the platforms
 which do support these primitves (e.g. Itanium, i386...) rather than
 excepting specific platforms.

 (Tested on HP-UX 11.11 using HP GCC 4.3.1 on a PA-8200 CPU.)

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/2263>
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