Subject: Re: GCC3 problems with C++ fstream
From: "Gerrit P. Haase" <[email-masked]>
To: [email-masked]
Date: Mon, 12 Aug 2002 19:31:05 +0200

Hallo Ney,

Am Montag, 12. August 2002 um 19:12 schriebst du:

> Gerrit P. Haase wrote:

>> #include <fstream>
>> void main() //the program starts here

> main() must return 'int'

>> {
>> ofstream SaveFile("cygwin.txt");

> ofstream lives in the 'std' namespace

>> SaveFile << "Hello World, this works with gcc-2 but not with gcc-3!";
>> SaveFile.close();
>> }

> Try this corrected version:

> #include <fstream>

> int main()
> {
>   using namespace std;

>   ofstream saveFile("test.txt");
>   saveFile << "Hello World, this works with gcc-2 but not with gcc-3!";
>   saveFile.close();

>   return 0;
> }

> Hope this helps,

Partially:
==========
$ g++ -o fstream fstream.cpp
In file included from /usr/include/g++-3/streambuf.h:36,
                 from /usr/include/g++-3/iostream.h:31,
                 from /usr/include/g++-3/fstream.h:30,
                 from /usr/include/g++-3/fstream:6,
                 from fstream.cpp:16:
/usr/include/g++-3/libio.h:30:23: _G_config.h: No such file or directory
In file included from /usr/include/g++-3/streambuf.h:36,
                 from /usr/include/g++-3/iostream.h:31,
                 from /usr/include/g++-3/fstream.h:30,
                 from /usr/include/g++-3/fstream:6,
                 from fstream.cpp:16:
/usr/include/g++-3/libio.h:239: '_G_off_t' is used as a type, but is not 
   defined as a type.
/usr/include/g++-3/libio.h:279: `read' was not declared in this scope
[...]

Still /usr/include/g++-3/fstream included instead of
/usr/include/c++/3.1.1/fstream and still getting the same errors,
and why does it work with g++-2 when compiling my original code?

However, your version works if gcc-2 is uninstalled, but shouldn't
it work with gcc-3 too, even if gcc-2 is also installed?

Gerrit
-- 
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