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Re: DejaGNU test case assistance please?
On Fri, Oct 07, 2005 at 12:06:32PM -0700, Kean Johnston wrote:
> >You're in luck! dg-warning and similar directives can be skipped or
> >xfailed for particular targets, but those don't take options into
> >account. There is, however, an effective-target keyword for fpic.
> Ok I'll give that a whirl. But what if I needed to skip the test
> based on some other command line option? Intuitively, I would want
> to use dg-skip-if or dg-xfail-if, which provide a more generalized
> approach to command line checking and doesnt rely on that special
> target.
Sorry, that's not supported.
> >The directives used in the GCC testsuite, along with effective-target
> >keywords and target/xfail selectors, are documented at
> >http://gcc.gnu.org/onlinedocs/gccint/Test-Directives.html.
>
> I read that carefully before asking the question, and it is very
> unclear (to me, a non-DG head) what the scope of some of those
> directives are. For example, dh-skip-if seems to apply to the
> entire test case, whereas things line dg-warning can appear on
> a line-by-line basis. Or perhaps I'm just assuming that, and they
> can in fact be used on a line-by-line test basis.
What would make it more clear? I could add a paragraph before the
list of directives saying that dg-error, dg-warning, and dg-bogus
apply to a single line and that others apply to the entire test,
or could list them separately, preceded by text that they apply to
a single line. This stuff is confusing and it would be nice for
the documentation to make it less so.
> This is purely for my education's sake (the fpic target you
> mentioned will suffice for the specific case I care about), but
> if I wanted to, say xfail the test if -mfoo was specified on the
> command line: Could I have something like:
>
> foo(); /* dg-warning "regexp" { ! dg-skip-if { "" { i?86-*-* } { "-mfoo"
> } { "" } } */
>
> The tcl syntax makes my head hurt so if thats wrong and you can
> show me a generalized way to do this type of thing I would be
> very grateful. Thank you Janis!
No, there's no way to do that. It took lots of fighting with TCL and
DejaGnu (and a tiny recursive-descent parser in TCL!) to get the
target/xfail selectors to work, and it would be difficult to support
the option lists for dg-warning and friends since those are defined
within DejaGnu. If there's enough demand for it, though, anything is
possible.
Janis