[PATCH v2 0/4] gas/x86: .arch / -march= enhancements

[Jan Beulich]

The lack of being able to go back to certain known state has bothered
me for quite a while. As did the seemingly arbitrary set of ".no*"
options available to turn off certain features. Finally I did find
time to make an attempt at adding the missing functionality.

1: don't leak sub-architecture accumulated strings
2: permit "default" with .arch
3: generalize disabling of sub-architectures
4: introduce a state stack for .arch

Jan