Re: linuxx8664icc: Problem with rootcint when generating dictionary files for a template class which Streamer function is user-defined

Yes I have compiled ROOT from the exact same sources, that is why I was assuming that it had something to do with the compiler (like a compiler-dependent preprocessing macro in CINT). I am recompiling ROOT from trunk right now and I will see if it fixes the problem...

Thanks!

Axel Naumann wrote:
> Hi,
>
> the name mangling is done by CINT, independently of the compiler used to build
> the dictionary. So my first assumption would be that you are using a version of
> ROOT that failed to mangle the template, and that we have fixed it in a later
> version.
>
> If that isn't it we have to find out whether ICC miscompiled CINT. Looking at
> the diff
>
> < &TestlEintgR_Dictionary, isa_proxy, 1,
> ---
>
>> &TestlEintgR_Dictionary, isa_proxy, 0,
>>
>
> and
> < G__tagtable_setup(...,94464,...
> ---
>
>> G__tagtable_setup(...,28928,...
>>
>
> it seems like CINT does not remember that the Linkdef statement ends with a
> "-". On the other hand you are saying that the Streamer() function does get
> suppressed in the generated dictionary file, so CINT must have noticed it. I
> also checked with valgrind but it didn't report anything.
>
> I don't have ICC 10.0 20070426; I'll try to hunt it down once you have
> confirmed that you use the same ROOT version for ICC and GCC.
>
> Cheers, Axel.
>
> On 2008-10-04 0:31, Pierre-Luc Drouin wrote:
>
>> Hi,
>>
>> I am trying to compile a template class with user-defined Streamer
>> function with ROOT linuxx8664icc and it seems that rootcint is
>> generating the wrong code.
>>
>> Here is a dummy template class that allows to reproduce the problem:
>>
>> #include <cstdio>
>> #include "Rtypes.h"
>>
>> template <typename U> class Test: public TObject
>> {
>> public:
>> Test(){printf("Hello World!\n");}
>> private:
>>
>> ClassDef(Test,1)
>> };
>>
>> template <typename U> void Test<U>::Streamer(TBuffer &R__b)
>> {
>> }
>>
>> The LinkDef file is the following:
>> #ifdef __CINT__
>>
>> #pragma link C++ class Test<Int_t>-;
>>
>> #endif
>>
>> I generate the dictionary file using the following command:
>> rootcint Test_Dict.cxx -c -I./ Test.h Test_LinkDef.h
>>
>> Here is the command I use to generate the object file and the error from
>> icc:
>> icc -c -o Test_Dict.o -xT -O3 -ipo -fPIC -wd1476
>> -I/data/data023/pldrouin/softwares/x86_64_icc/root/include -wd1572 -fPIC
>> Test_Dict.cxx
>> Test_Dict.cxx(51): error: namespace "ROOT::Shadow" has no member "Test"
>> R__ASSERT(sizeof(::Test<int>) == sizeof(::ROOT::Shadow::Test<int>));
>> ^
>>
>> Test_Dict.cxx(51): error: type name is not allowed
>> R__ASSERT(sizeof(::Test<int>) == sizeof(::ROOT::Shadow::Test<int>));
>> ^
>>
>> Test_Dict.cxx(51): error: expected an expression
>> R__ASSERT(sizeof(::Test<int>) == sizeof(::ROOT::Shadow::Test<int>));
>> ^
>>
>> Test_Dict.cxx(119): error: qualified name is not allowed
>> typedef ::ROOT::Shadow::Test<int> ShadowClass;
>> ^
>>
>> Test_Dict.cxx(119): error: expected a ";"
>> typedef ::ROOT::Shadow::Test<int> ShadowClass;
>> ^
>>
>> Test_Dict.cxx(120): error: identifier "ShadowClass" is undefined
>> ShadowClass *sobj = (ShadowClass*)obj;
>> ^
>>
>> Test_Dict.cxx(120): error: identifier "sobj" is undefined
>> ShadowClass *sobj = (ShadowClass*)obj;
>> ^
>>
>> Test_Dict.cxx(120): error: expected an expression
>> ShadowClass *sobj = (ShadowClass*)obj;
>> ^
>>
>> Test_Dict.cxx(120): error: expected a ";"
>> ShadowClass *sobj = (ShadowClass*)obj;
>> ^
>>
>> compilation aborted for Test_Dict.cxx (code 2)
>> gmake: *** [Test_Dict.o] Error 2
>>
>>
>> I am using icc 10.0 20070426. Please note that this problem does not
>> occur with linuxx86gcc, with a non-template class or with a template
>> class with an auto-generated Streamer function. The problem seems to be
>> related to name mangling for the class. Here is a diff of the generated
>> dictionary files with and without user-defined Streamer functions
>> (removing the diff due to the implementation of the Streamer function in
>> the dictionary file in the case where it is not user-defined):
>> 33a34,44
>>
>>> #if !(defined(R__ACCESS_IN_SYMBOL) || defined(R__USE_SHADOW_CLASS))
>>> typedef ::Test< int > TestlEintgR;
>>> #else
>>> class TestlEintgR : public ::TObject {
>>> public:
>>> //friend XX;
>>> // To force the creation of a virtual table, throw just in case.
>>> virtual ~TestlEintgR() throw() {};
>>> };
>>> #endif
>>>
>>>
>> 51c62
>> < R__ASSERT(sizeof(::Test<int>) ==
>> sizeof(::ROOT::Shadow::Test<int>));
>> ---
>>
>>> R__ASSERT(sizeof(::Test<int>) ==
>>>
>> sizeof(::ROOT::Shadow::TestlEintgR));
>> 57c68
>> < &TestlEintgR_Dictionary, isa_proxy, 1,
>> ---
>>
>>> &TestlEintgR_Dictionary, isa_proxy, 0,
>>>
>> 119c147
>> < typedef ::ROOT::Shadow::Test<int> ShadowClass;
>> ---
>>
>>> typedef ::ROOT::Shadow::TestlEintgR ShadowClass;
>>>
>> 527c555
>> <
>> G__tagtable_setup(G__get_linked_tagnum(&G__Test_DictLN_TestlEintgR),sizeof(Test<int>),-1,94464,(char*)NULL,G__setup_memvarTestlEintgR,G__setup_memfuncTestlEintgR);
>>
>> ---
>>
>>>
>>>
>> G__tagtable_setup(G__get_linked_tagnum(&G__Test_DictLN_TestlEintgR),sizeof(Test<int>),-1,28928,(char*)NULL,G__setup_memvarTestlEintgR,G__setup_memfuncTestlEintgR);
>>
>>
>> Thank you!
>> Pierre-Luc Drouin
>>
>>
>>
>
>
Received on Mon Oct 06 2008 - 18:17:08 CEST