Template redefinition problem

[lomat]

Hello,

While compiling a file, I get following error ....

=============== =============== ===
/usr/local/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/include/g++/type_traits.h:1 4
2: redefinition of `struct __type_traits<s hort int>'
/usr/local/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/include/g++/type_traits.h:1 0
2: previous definition here
=============== =============== ===


If I open file
/usr/local/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/include/g++/type_traits.h,
the source code looks like below,
=============== =============== ===
94 #ifndef __STL_NO_BOOL
95
96 __STL_TEMPLATE_ NULL struct __type_traits<b ool> {
97 typedef __true_type has_trivial_def ault_constructo r;
98 typedef __true_type has_trivial_cop y_constructor;
99 typedef __true_type has_trivial_ass ignment_operato r;
100 typedef __true_type has_trivial_des tructor;
101 typedef __true_type is_POD_type;
102 };
103
104 #endif /* __STL_NO_BOOL */
....
<snip>
....

142 __STL_TEMPLATE_ NULL struct __type_traits<s hort> {
143 typedef __true_type has_trivial_def ault_constructo r;
144 typedef __true_type has_trivial_cop y_constructor;
145 typedef __true_type has_trivial_ass ignment_operato r;
146 typedef __true_type has_trivial_des tructor;
147 typedef __true_type is_POD_type;
148 };
=============== =============== ===

The macro __STL_NO_BOOL is NOT defined in my environment.

If I pass the file through the precompiler (using command gcc -E <file name,
inc paths etc.>), output shows above two templates as .....
=============== =============== ===
template<> struct __type_traits< short > {
typedef __true_type has_trivial_def ault_constructo r;
typedef __true_type has_trivial_cop y_constructor;
typedef __true_type has_trivial_ass ignment_operato r;
typedef __true_type has_trivial_des tructor;
typedef __true_type is_POD_type;
};
....
<snip>
....
template<> struct __type_traits<s hort> {
typedef __true_type has_trivial_def ault_constructo r;
typedef __true_type has_trivial_cop y_constructor;
typedef __true_type has_trivial_ass ignment_operato r;
typedef __true_type has_trivial_des tructor;
typedef __true_type is_POD_type;
};
=============== =============== ===

These two templates are causing the redefinition problem and it is clear
that keyword "bool" is being resolved as "short".

I am using GCC 2.95.3 on RedHat 8.0 on Intel PIII.

- Can anyone give any directions regarding what could cause this problem?

- Secondly, though in my opinion bool is being resolved as short, the error
flagged by compiler says "redefiniti on of `struct __type_traits<s hort
int>'". As a result, I am not sure if what I think is incorrect or "short"
is same as "short int"?

Thanks,


Loma

[Gianni Mariani]

Re: Template redefinition problem

lomat wrote:
[color=blue]
>
> I am using GCC 2.95.3 on RedHat 8.0 on Intel PIII.
>
> - Can anyone give any directions regarding what could cause this problem?[/color]

Get a later version of the compiler. The latest (and best) version is
gcc 3.3.1 and is significantly better than 2.9x .

[Attila Feher]

Re: Template redefinition problem

lomat wrote:[color=blue]
> These two templates are causing the redefinition problem and it is
> clear that keyword "bool" is being resolved as "short".
>
> I am using GCC 2.95.3 on RedHat 8.0 on Intel PIII.
>
> - Can anyone give any directions regarding what could cause this
> problem?[/color]

Look for a header, included before that with "#define bool short".

--
Attila aka WW

[lomat]

Re: Template redefinition problem


"Gianni Mariani" <gi2nospam@mari ani.ws> wrote in message
news:bkn3qi$qef @dispatch.conce ntric.net...[color=blue]
> lomat wrote:
>[color=green]
> >
> > I am using GCC 2.95.3 on RedHat 8.0 on Intel PIII.
> >
> > - Can anyone give any directions regarding what could cause this[/color][/color]
problem?[color=blue]
>
> Get a later version of the compiler. The latest (and best) version is
> gcc 3.3.1 and is significantly better than 2.9x .
>[/color]

Thanks Gianni

I can't use the latest GCC version 3.3, as the name mangling sheme it uses
is different from the 2.95.x scheme.
I tried using 3.3 but then I get zillions of linkage errors as the symbols
from the libraries I use (which are built using 2.95.x) can't be resolved.
The libraries that I use are non-open source (third party) and I can't build
them using 3.3 as I don't have shource.
As a result, I must use 2.95.x. Any suggestions?

[Gianni Mariani]

Re: Template redefinition problem

lomat wrote:[color=blue]
> "Gianni Mariani" <gi2nospam@mari ani.ws> wrote in message
> news:bkn3qi$qef @dispatch.conce ntric.net...
>[color=green]
>>lomat wrote:
>>
>>[color=darkred]
>>>I am using GCC 2.95.3 on RedHat 8.0 on Intel PIII.
>>>
>>>- Can anyone give any directions regarding what could cause this[/color][/color]
>
> problem?
>[color=green]
>>Get a later version of the compiler. The latest (and best) version is
>>gcc 3.3.1 and is significantly better than 2.9x .
>>[/color]
>
>
> Thanks Gianni
>
> I can't use the latest GCC version 3.3, as the name mangling sheme it uses
> is different from the 2.95.x scheme.
> I tried using 3.3 but then I get zillions of linkage errors as the symbols
> from the libraries I use (which are built using 2.95.x) can't be resolved.
> The libraries that I use are non-open source (third party) and I can't build
> them using 3.3 as I don't have shource.
> As a result, I must use 2.95.x. Any suggestions?[/color]

No easy ones.

a) Time to go back to the supplier and get 3.3.1 binaries ?

b) Stick to a subset of C++ that 2.95.x is happy with.

c) Get the functionality from a different source that supplies 3.3.1
binaries.

[tom_usenet]

Re: Template redefinition problem

On Mon, 22 Sep 2003 21:05:23 +0530, "lomat" <atambe@ideas.c om> wrote:
[color=blue]
>
>"Gianni Mariani" <gi2nospam@mari ani.ws> wrote in message
>news:bkn3qi$qe f@dispatch.conc entric.net...[color=green]
>> lomat wrote:
>>[color=darkred]
>> >
>> > I am using GCC 2.95.3 on RedHat 8.0 on Intel PIII.
>> >
>> > - Can anyone give any directions regarding what could cause this[/color][/color]
>problem?[color=green]
>>
>> Get a later version of the compiler. The latest (and best) version is
>> gcc 3.3.1 and is significantly better than 2.9x .
>>[/color]
>
>Thanks Gianni
>
>I can't use the latest GCC version 3.3, as the name mangling sheme it uses
>is different from the 2.95.x scheme.
>I tried using 3.3 but then I get zillions of linkage errors as the symbols
>from the libraries I use (which are built using 2.95.x) can't be resolved.
>The libraries that I use are non-open source (third party) and I can't build
>them using 3.3 as I don't have shource.
>As a result, I must use 2.95.x. Any suggestions?[/color]

Try adding
#define __STL_NO_BOOL 1
to your project defines.

Tom