[Bug testsuite/53028] add dg-pedantic

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53028

--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-04-18 18:25:46 UTC ---
(In reply to comment #2)
> I don't see much value in this.  The primary idea of the gcc testsuite is as a
> regression suite.  For a regression, there is just one bit of code that you're
> testing, with one set of options.

I don't understand this. Maybe I didn't explain myself properly. There are
already hundreds of testcases that are triplicated with the only difference of
not using -pedantic and testing that no warning is given, and using -pedantic
and testing for a warning and using -pedantic-errors and testing that an error
is given. Such testcases imply:

* a duplication of code, which is perhaps not very important nowadays.

* a duplication of creation effort, the developer has to create three testcases
and add the appropriate markers in all of them.

* a duplication of maintainer effort, if a testcase needs to be modified, one
has to check whether a warning/error was caused by -pedantic or not and update
the corresponding duplicated testcases.

Using dg-pedantic will solve the above issues.

This is not very different from the torture testcases that test the same code
with different optimization options or the c-c++-common testcases, but in this
case the meaning of dg-pedantic should change accordingly. Is it possible to
implement this in DejaGNU?