On Thu, Feb 9, 2017 at 10:00 AM, Daniel Walker <danie...@cisco.com> wrote: > > Hi, > > > It looks like -mcpu=common (on the powerpc architecture) was removed. My > group is struggling to find a way to compile generic binaries for PowerPC. > We have been getting an LWSYNC instruction included in the binaries, and > some of our processors are getting a trap when this instructions is > executed. The platforms we are using are all Freescale, they are p2020, > t1042, and 8540. > > Freescale support informed us that we should use -mcpu=common , which is > gone, we tried a number of other -mcpu setting including -mcpu=powerpc, but > none of them allow us to have generic binaries for all the platforms. > > I suppose this is either a bug report that we're getting lwsync when we > shouldn't be getting it, or just a question of what the typical tune is to > make generic binaries ?
Since you have two majorly different classes of PowerPC here, the answer is there is no way. Basically you have an e500 (8540) and an e500mc/e5500 (p2020 t1042). Note the e500 is not full compatible standard PowerPC but rather a book-e PowerPC. book-e PowerPC are funny and not fully compatible to the standard PowerPC spec; an example is lwsync; another example is the floating point unit (e500 has SPE while the e500mc is the standard PowerPC fp unit). Thanks, Andrew > > Thanks for any help, > > Daniel >
