------- Comment #1 from rguenth at gcc dot gnu dot org 2008-10-14 19:56 ------- You cannot touch the library part, but you certainly can align what the compiler does to the library part of the structure definition. Thus, if the behavior is wrong (as in wrong-code) at the moment, changing the "ABI" only in parts that affect the wrong-code bug certainly is ok.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37827