> Can we just add “%(cc1_options)”, or is there a reason why it is missing?
It is not missing, reusing cc1_options is simply problematic because different FEs can have different needs. In particular, in Ada we need to echo the order of -g* and -m* switches (the "%{g*&m*}" thing) and cc1_options doesn't do it. That being said, there are enough common bits as to deserve a factorization. -- Eric Botcazou