Re: [Dev-C++] A few more questions

[Michal M. <mol...@se...>]

Dne 2.4.2013 11:52, Leslaw Bieniasz napsal(a):> Hi,
>
> I am beginning to work with DevC++ and MInGW compiler, and I have a few
> questions:
>
> 1) I notice that the method name() of the type_info object returned by
> the operator typeid() does not return the exact class name (when called
> for a class object), but the class name preceded by some digits. Is this
> a normal behaviour or some bug in the compiler?

C++ standard does not define what exactly it should return, so basically
everything is OK. c++filt.exe in the bin directory should be able to
demangle it.

> 3) I notice that the size of the executables (for console type
> applications) exceeds several times the size that I have previously
> obtained by using Borland C++ Builder. Is there any way (compiler
> options?) to reduce this size, and what is generally the reason
> for this behaviour?

Turn off generating of debugging information and enable stripping
of executable when Linking. It should be somewhere in the Project Options,
Compiler settings, Linker. GCC has also -Os setting for optimization for
size. But the biggest difference should do the striping. You can also strip
already build executable using the strip.exe from the bin directory.

> 5) I wonder if anybody has experiences with creating DLLs that
> cooperate with MS C++ Visual Studio - produced GUIs?
> This is something that I need to do, because I need long double
> variables offered by MInGW and DevCPP, but Visual Studio should
> be better for making a GUI, although it does not provide
> support for long doubles. Will such a combination work?

You will have problems in passing the long double value to/from gui, you would
have to either pass it as string or just double or something like that. Also
note that the free Visual C++ Express does not support MFC, only .Net framework
GUI libraries which uses completely non-standard C++ dialect.
If I were you I would use wxWidgets library for GUI, it's something like MFC,
there are some tools which help with layouting of forms, eg. wxDev-C++, although
the quality of these tools vary and none of them of course equals to MFC support
in full version of Visual Studio.

Regards,
Michal Molhanec