ARMv7-M MPU.  Bad syntax will cause failure to write the correct value to the MPU_RASR register.  From Juha Niskanen

libc: stdio: Fix NULL pointer dereference in ungetc(). If 'stream' was NULL, 'stream->fs_oflags' was evaluated.  From Juha Niskanen

mq_timedsend():  Do check for time errors if the message queue is not full.  Noted by Freddie Chopin

SAMV7:  Update floating point and TCM configuration options.  Update TODO list.  Update comments.  Refresh a configuration