Re: [Qemu-devel] [PATCH 5/5] configure: disable a few Clang compiler warnings

[Blue Swirl <blauwirbel@gmail.com>]

On Mon, Jul 30, 2012 at 4:56 PM, Stefan Weil <sw@weilnetz.de> wrote:
> Am 30.07.2012 18:04, schrieb blauwirbel@gmail.com:
>
>> From: Blue Swirl <blauwirbel@gmail.com>
>>
>> Clang compiler warns about a few constructs in QEMU code. It's possible
>> to avoid those but that needs more work.
>>
>> Suppress some warnings for Clang compiler. -Wno-unused-value would
>> conflict with GCC.
>>
>> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
>> ---
>>   configure |    5 ++++-
>>   1 files changed, 4 insertions(+), 1 deletions(-)
>>
>> diff --git a/configure b/configure
>> index c65b5f6..e32f188 100755
>> --- a/configure
>> +++ b/configure
>> @@ -1154,17 +1154,20 @@ if test -z "$werror" ; then
>>       fi
>>   fi
>>   +# GCC flags
>>   gcc_flags="-Wold-style-declaration -Wold-style-definition -Wtype-limits"
>>   gcc_flags="-Wformat-security -Wformat-y2k -Winit-self
>> -Wignored-qualifiers $gcc_flags"
>>   gcc_flags="-Wmissing-include-dirs -Wempty-body -Wnested-externs
>> $gcc_flags"
>>   gcc_flags="-fstack-protector-all -Wendif-labels $gcc_flags"
>> +# Clang flags
>> +clang_flags="-Wno-initializer-overrides -Wno-self-assign
>> -Wno-constant-conversion"
>
>
> I'd prefer getting these warnings (and not having them disabled)
> for compilations without -Werror ("$werror" = "no").

On second thought the patch makes little sense, I'll drop it. I was
trying to get everything compiled with -Werror, but that's impossible
anyway with AREG0 conversion unfinished.

>
> Regards,
>
> Stefan W.
>
>
>
>>
>>   if test "$werror" = "yes" ; then
>>       gcc_flags="-Werror $gcc_flags"
>>   fi
>>   cat > $TMPC << EOF
>>   int main(void) { return 0; }
>>   EOF
>> -for flag in $gcc_flags; do
>> +for flag in $gcc_flags $clang_flags; do
>>       if compile_prog "-Werror $flag" "" ; then
>>         QEMU_CFLAGS="$QEMU_CFLAGS $flag"
>>       fi
>
>