On 21/12/06, Janis Johnson <[EMAIL PROTECTED]> wrote:
On Wed, Dec 20, 2006 at 03:06:34PM +0100, Jan Eissfeld wrote: > Hi, > > PR19978 reports that some overflow warnings are emitted multiple times. Like for example, > > test.c:6: warning: integer overflow in expression > test.c:6: warning: integer overflow in expression > test.c:6: warning: integer overflow in expression > > The current testsuite will match any number of those to a single { > dg-warning }. I don't know whether this is a known limitation, a bug > on the testsuite or it just needs some magic. > > How could I test that exactly one warning was emitted?See http://gcc.gnu.org/ml/gcc/2006-12/msg00000.html for an ugly solution, and the rest of the thread for problems with this approach. The check for getting the warning must be in a separate test from the check for multiple warnings. Janis
Or even better, see http://gcc.gnu.org/ml/gcc-patches/2006-12/msg00588.html which fixes that PR and adds testcases to prevent regressing on this. It is still awaiting for review, though. ;-)
