using _set_se_translator and compilation flags

Question

Documentation states that "You must use /EHa when using _set_se_translator.".
My question is: should /EHa be used for all files in project/ all files in project that catch exceptions or just in the file that calls _set_se_translator ?

Answer 1

You need it not just for functions that catch exceptions, but also functions that throw and propagate them. The actual call to _set_se_translator itself probably doesn't need to be compiled with /Eha, but why be inconsistent?