armv6j (e.g. i.MX31) does not support ldrexb/strexb. (2013/01/27 6:46), Matt Thomas wrote:
On Jan 26, 2013, at 12:36 PM, Frank Zerangue wrote:Has anyone seen this warning on a NetBSD-6.0.1 build using an arm core arm1136jf-s? This is an armv6 architecture which deprecates the swp{b} instruction. It looks like gcc version 4.5.3 (NetBSD nb2 20111202) is incorrectly producing swp instructions for this cpu type, -mcpu=arm1136jf-s.It's deprecated but still works. There are changes in current which moves it to ldrexb/strexb. You can ignore it for now.