[cfe-dev] compilling clang

[Eric Christopher]

On Tue, Jul 16, 2013 at 10:25 PM, Devchandra L Meetei
<dlmeetei at gmail.com> wrote:
> Thanks, Lost the warning msgs.
> clang can not finishes the clang compilation kin 4 or 5 hours, Seems
> horrible.
>
> is there any specific reason to prefer clang over gcc when clang is
> installed?
>

The installed clang is presumed to be a release build without asserts
enabled and should be faster on your platform than gcc. You should
check which clang is being used to build and make sure it isn't a
debug build which can often slow clang down up to 10x.

clang -v will provide the type of information you're looking for as
well as looking in config.log to see which clang it picked.

-eric

> Let me retried to get the warnings at weekend and open a Bug for it.
>
>
> On Tue, Jul 16, 2013 at 10:16 PM, Eli Friedman <eli.friedman at gmail.com>
> wrote:
>>
>> On Tue, Jul 16, 2013 at 5:19 AM, Devchandra L Meetei <dlmeetei at gmail.com>
>> wrote:
>> > Compilling LLVM/clang does  not finish compilling for 3 or 4 hours(which
>> > was
>> > not the case earlier). and saw following warning also. The warning
>> > format
>> > does not seem to be from
>> >> gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
>>
>> If clang is installed on your system, configure will automatically
>> prefer it over gcc.  You can override this by specifying CC and CXX.
>>
>> That said, please file a bug; building clang with clang should not
>> generate warnings.
>>
>> -Eli
>
>
>
>
> --
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> --Dev
> OpenPegasus Developer/Committer
>
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