RFE: configuration for compiling HotSpot with Clang

[Volker Simonis]

g++ 4.4.3 and 4.5.2 definitely don't find the bug.

I filed a bug report with a slightly more complex example than that
from the FAQ at:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47752

Regards,
Volker

On Fri, Feb 11, 2011 at 10:37 PM, Mark Wielaard <mark at klomp.org> wrote:
> On Fri, 2011-02-11 at 19:24 +0100, Volker Simonis wrote:
>> Notice that this patch contains one additional change compared to the
>> patch in the blog. While I did the tests for the blog with an slightly
>> outdated HS20b03 I synced a brand new version today to prepare the
>> patch. With this new version I found a true C++ bug in
>> "src/share/vm/utilities/hashtable.hpp" which was introduced recently
>> by the "6990754: Use native memory and reference counting to implement
>> SymbolTable" change and which has to do with name lookup of
>> nondependent names in dependent base classes (see
>> http://www.parashift.com/c++-faq-lite/templates.html#faq-35.19 for a
>> nice explanation). Wouldn't have happened with Clang:)
>
> I didn't try building HS20b03 yet, but g++ (at least version 4.1, 4.4
> and 4.5) should be able to detect this. Trying to compile the FAQ
> example gives:
>
> t.cpp: In member function ‘void D<T>::g()’:
> t.cpp:12:8: error: there are no arguments to ‘f’ that depend on a
> template parameter, so a declaration of ‘f’ must be available
> t.cpp:12:8: note: (if you use ‘-fpermissive’, G++ will accept your code,
> but allowing the use of an undeclared name is deprecated)
>
> If g++ didn't detect it in the hashtable.hpp case, could you file a bug
> report for it http://gcc.gnu.org/bugzilla
>
> Thanks,
>
> Mark
>
>