http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60336
--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to vagran from comment #9) > (In reply to Andrew Pinski from comment #7) > > (In reply to H.J. Lu from comment #4) > > > Is this test valid? BTW, clang works fine on x86. > > > > No this testcase is not valid at all. See > > http://gcc.gnu.org/onlinedocs/gcc-4.8.2/gcc/Empty-Structures.html#Empty- > > Structures where it is documented it is not valid. > > How it proves that the test case is invalid? I am not saying the original testcase (variable argument case) is invalid, just the testcase where you are passing an empty struct between C and C++ one is invalid.