[c++] PR 30551 -pedantic does not include -Wmain, but -pedantic-errors does make -Wmain cause error messages

[Manuel López-Ibáñez]

2008/8/12 Joseph S. Myers <joseph@codesourcery.com>:
> On Thu, 7 Aug 2008, Manuel López-Ibáñez wrote:
>
>> 2008-08-04  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
>>
>>   PR 30551
>>   * c-decl.c (start_decl): warn_main is only 0 or 1.
>>   (start_function): Likewise. Fix formatting.
>>   (finish_function): Delete redundant warning.
>>   * c.opt (Wmain): Add Var(warn_main) and Init(-1).
>>   * c-opts (c_common_handle_option): -Wall only has effect if
>> warn_main is uninitialized.
>>   OPT_Wmain is automatically handled. -pedantic also enables Wmain.
>>   (c_common_post_options): Handle all logic for Wmain here.
>>   * c-common.c (warn_main): Delete.
>>   (check_main_parameter_types): Make pedwarns conditional on OPT_Wmain.
>>   * c-common.h (warn_main): Delete.
>
>> testsuite/
>>   * doc/invoke.texi (Wmain): Update.
>>   * gcc.dg/pr30551.c: New.
>>   * gcc.dg/pr30551-2.c: New.
>>   * gcc.dg/pr30551-3.c: New.
>>   * gcc.dg/pr30551-4.c: New.
>>   * gcc.dg/pr30551-5.c: New.
>>   * gcc.dg/pr30551-6.c: New.
>>   * gcc.dg/tree-ssa/reassoc-3.c: Don't compile with -pedantic-errors.
>
> The C parts of the patch (those with log entries above) are OK.
>

PING: http://gcc.gnu.org/ml/gcc-patches/2008-08/msg00435.html

The following changes still need review from C++ maintainer:

cp/
 * decl.c (grokfndecl): Call check_main_parameters_type only if -Wmain.

testsuite/
 * g++.dg/warn/pr30551.C: New.
 * g++.dg/warn/pr30551-2.C: New.
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