Re: How to write testcase with two warnings on one line?

["Joseph S. Myers" <joseph at codesourcery dot com>]

On Tue, 21 Jun 2005, Feng Wang wrote:

> Hi,
> 
> I want to write a testcase. The compiler gives two separated warnings on one
> statement. How to write this with Dejagnu? 
> 
> I tried:
>  { dg-warning "Warning1" "Warning2" }
> and
> { dg-warning "Warning1" 8}
> { dg-warning "Warning2" 8}
> 8 is the line number of the statment.

The correct way of writing warning tests with a line number is

{ dg-warning "warning" } (on original line, no number needed)
{ dg-warning "warning 2" "description" { target *-*-* } 8 } (for each 
other warning)

The description is needed and needs to be nonempty and distinct for the 
second and subsequent warnings on a given line, because it is used to form 
the distinct test assertion names which appear after PASS or FAIL in the 
.sum files - having multiple tests with the same name causes ambiguity for 
regression testers.

Listing the warnings separately like this is preferable to using a regular 
expression which matches both warnings because this way you detect if just 
one of the warnings disappears.

-- 
Joseph S. Myers               http://www.srcf.ucam.org/~jsm28/gcc/
    jsm@polyomino.org.uk (personal mail)
    joseph@codesourcery.com (CodeSourcery mail)
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