[Bug c/37064] missing warning on pure function with side-effects

[sebor at roguewave dot com]

------- Comment #1 from sebor at roguewave dot com  2008-08-08 19:47 -------
Similarly, functions declared with the const attribute such as f1() in the
test case below that violate the compiler's assumptions should be diagnosed:

$ cat -n t.C && g++ -c -O2 -Wall -W t.C
     1  extern int i;
     2  int f1 () __attribute ((const));
     3  int f1 ()
     4  {
     5      return i;
     6  }
     7


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37064