stdalign: relax _Alignof and tighten _Alignas test

[gnulib.git] / ChangeLog

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+2012-01-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+       stdalign: relax _Alignof and tighten _Alignas test
+       * m4/stdalign.m4 (gl_STDALIGN_H): Relax the _Alignof test,
+       as it was too strict: alignof must divide offsetof, but it need
+       not equal offsetof.  Inspired by Joseph S. Myers's comment
+       <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023#c10>.
+       Conversely, tighten the _Alignas test a bit, as the resulting
+       alignment must be exactly 8.
+
 2012-01-27  Bruno Haible  <bruno@clisp.org>
 
        stdalign: Document the last change.