[boost] ARM thumb support in spinlock_gcc_arm.hpp

Subject: [boost] ARM thumb support in spinlock_gcc_arm.hpp
From: Jerry Napoli (jnapoli_at_[hidden])
Date: 2008-09-05 13:43:30

Hi,

I'm trying to compile using boost 1_36_0 for ARMv6 Thumb for iPhone 
development.  The compiler used is gcc 4.0.x supplied with the iphone sdk.

I run into issues with the inline assembly inside 
boost/detail/spinlock_gcc_arm.hpp.  It generates a SWP instruction which 
(AFAIK) is not supported in thumb mode.  The gnu arm assembler gives me 
a 'bad instruction ...' error.  I'm able to work around it by modifying 
spinlock.hpp to include spinlock_sp.hpp instead.  But has anyone 
addressed spinlock support for armv6 thumb?

Thanks,
Jerry