[Bug rtl-optimization/52785] Compile with -O fails in gcc 4.7

[sergio at serjux dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52785

--- Comment #3 from Sérgio Basto <sergio at serjux dot com> 2012-03-30 02:13:44 
UTC ---
Created attachment 27041
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27041
preprocessed source with -O1

/usr/include/xorg/os.h:496:55: error: expected identifier or ‘(’ before
‘__extension__’

line 496 is:
extern _X_EXPORT char * strndup(const char *str, size_t n);

we have just 3 strndup in teste.i

don't see anything wrong