invalid conversion from const char** to char**

invalid conversion from const char** to char**

[Dhiraj.Nilange]

Hi,

I am using g++ 4.1.1. on Linux (AMD-64-bit).

In a C++ code  I have a function whose prototype is given below:-

void fun(const char *var[]);

And I am passing the variable to this function defined as:-

const char **vname;

so the call goes as:-    fun(vname);

But I get compile time error for this:-

invalid conversion from const char** to char**

this code perfectly worked on other platforms using different conmpilers
(Windows,HP-UX,AIX etc). Only with Linux/g++ combination I get this
issue.

Please suggest some solution.

Thanks & Regards,
-Dhiraj

Re: invalid conversion from const char** to char**

[me22]

On 15/06/07, Dhiraj.Nilange@iflexsolutions.com
<Dhiraj.Nilange@iflexsolutions.com> wrote:
> void fun(const char *var[]);
> const char **vname;
>
> so the call goes as:-    fun(vname);
>
> But I get compile time error for this:-
> invalid conversion from const char** to char**
>
I don't think we can solve this one without more information.

void fun(char const *var[]) {}
int main() {
    char const **vname;
    fun(vname);
}

Compiles cleanly with -ansi -pedantic.

Make sure nothing is defining away const, or something similar.

~ Scott

Re: invalid conversion from const char** to char**

[Tim Prince]

me22 wrote:
> On 15/06/07, Dhiraj.Nilange@iflexsolutions.com
> <Dhiraj.Nilange@iflexsolutions.com> wrote:
>> void fun(const char *var[]);
>> const char **vname;
>>
>> so the call goes as:-    fun(vname);
>>
>> But I get compile time error for this:-
>> invalid conversion from const char** to char**
>>
> I don't think we can solve this one without more information.
>
But OP could use the full information which was withheld to find the 
incorrect header or similar problem which leads to the complaint.  This 
is a common problem with legacy code, which was not diagnosed by gcc 
until recently (at least not by default).