instance method Kernel#with_werror

with_werror(opt, opts = nil) {|opt| ... } -> object[permalink][rdoc] [added by mkmf]
with_werror(opt, opts = nil) {|opt, opts| ... } -> object [added by mkmf]

[TODO] 内部用?

???

[PARAM] opt:
????
[PARAM] opts:
????
[RETURN]
ブロックを評価した結果を返します。