On Mon, Nov 20, 2006 at 11:50:44AM +0100, Thomas Schwinge wrote: > There is a problem when building glibc for GNU/Hurd with GCC 4.1, see > <http://savannah.gnu.org/bugs/?17647>. This is due to a change in the > behavior of `__builtin_frame_address' in GCC 4.1:
The example you give is a test that the argc argument to main lives in the third 32-bit word of the frame as returned by __builtin_frame_address; evidently (according to your test) this is true for 3.3, 3.4, and 4.0 but not 4.1. But there is no standard that specifies this position for argc. I did a little looking and found http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8335 since the fix is a change to __builtin_frame_address behavior that appeared in 4.1. I wonder if you are relying on undocumented behavior that turned out to be a bug that has since been fixed. _______________________________________________ Bug-hurd mailing list Bug-hurd@gnu.org http://lists.gnu.org/mailman/listinfo/bug-hurd
