Re: GCC switch to C11 causes many testsuite compiler diagnostics

[Andreas Arnez <arnez at linux dot vnet dot ibm dot com>]

On Sat, Oct 25 2014, Mark Kettenis wrote:

>> Date: Sat, 25 Oct 2014 11:03:34 -0600
>> From: Sandra Loosemore <sandra@codesourcery.com>
>> 
>> Comparing my latest nios2 test results (with Pedro's thread patch) with 
>> those from a checkout a couple weeks old, I noticed I had some new 
>> ERRORs due to apparent compilation failures.  I tracked this down to the 
>> recent change on GCC mainline (r216247) to make the default C dialect 
>> GNU11, which enables -Wimplicit-int and -Wimplicit-function-declaration 
>> by default.  I started working on a patch to fix the offending 
>> testcases, but realized that there are hundreds of them.  :-(
>> 
>> So, before I invest a lot more time on this, is updating the GDB 
>> testsuite to use a more modern C dialect the Right Thing To Do?  I'm 
>> also wondering if it's really necessary to support compilers that can't 
>> handle function prototypes in the testsuite (not defining PROTOTYPES 
>> seems to be the default, in fact).
>
> We've quite deliberately kept around a variety of C dialects and
> coding styles to make sure GDB works with whatever style people use.
> Having the majority of the tests use K&R style function declarations
> is probably not so useful anymore.  But there are some tests that
> deliberately use K&_R style code to test whether GDB handles them
> properly.  So blind conversion is probably not a good idea.

Do you know off hand which tests deliberately use K&R style code?  Maybe
you'd like to verify that none of them is deleted by this patch series:

  https://sourceware.org/ml/gdb-patches/2014-10/msg00802.html

--
Andreas