What do you need help with? V. 3.0

[Richy13]

Does anyone know if i can build stuff in cygwen (with linux makefiles) and then use it in MinGW?
I have a couple of libraries that only include makefiles :/

Also is it possible to create a single makefile that would build both static and dynamic release and debug files with CMAKE?

[Map in a box]

[QUOTE=Richy19;31366159]Does anyone know if i can build stuff in cygwen (with linux makefiles) and then use it in MinGW?
I have a couple of libraries that only include makefiles :/[/QUOTE]
Do you mean Cygwin? I'm sure IDEs do that automaticly.

[editline]27th July 2011[/editline]

I'm PRETTY sure*

[Richy13]

[QUOTE=Map in a box;31366170]Do you mean Cygwin? I'm sure IDEs do that automaticly.[/QUOTE]

Yea Cygwin, the problem is I only have linux makefiles, so I cant build it in anything else

[Map in a box]

What do you mean? What are you trying to compile?

[Richy13]

well glew for example only has makefiles and VC6 project, I tried importing the vc6 into codeblocks but it didnt seem to work

[Map in a box]

Mmm, I don't use codeblocks so I won't beable to help you. Good luck, though.
Since the people at stack exchange are being super helpful, I'll ask here.
How would I make a bootloader in the Eclipse IDE?

[Wyzard]

[QUOTE=ROBO_DONUT;31361710]If you're writing a codec or running some sort of feedback loop, you probably can't afford that overhead.[/QUOTE]
Smart pointers don't incur [i]that[/i] much overhead. And if you're writing a real-time application where any unplanned delay is problematic, C++ is a poor choice anyway.

[Map in a box]

[QUOTE=Wyzard;31367004]Smart pointers don't incur [i]that[/i] much overhead. And if you're writing a real-time application where any unplanned delay is problematic, C++ is a poor choice anyway.[/QUOTE]
Why would pointers have any delay in the first place?(compared to normal variable getting)

[esalaka]

[QUOTE=Map in a box;31367022]Why would pointers have any delay in the first place?(compared to normal variable getting)[/QUOTE]

[I]Smart[/I] pointers. The kind that automatically get rid of the object they point to when they get out of scope, etc.

[Map in a box]

[QUOTE=esalaka;31367145][I]Smart[/I] pointers. The kind that automatically get rid of the object they point to when they get out of scope, etc.[/QUOTE]
Didn't think about smart pointers. But still, not much overhead.

[Richy13]

[QUOTE=Richy19;31366159]Does anyone know if i can build stuff in cygwen (with linux makefiles) and then use it in MinGW?
I have a couple of libraries that only include makefiles :/

Also is it possible to create a single makefile that would build both static and dynamic release and debug files with CMAKE?[/QUOTE]

It seems MSYS is what I was looking for

[esalaka]

MSYS is nice

[q3k]

[QUOTE=Richy19;31366159]Does anyone know if i can build stuff in cygwen (with linux makefiles) and then use it in MinGW?[/QUOTE]
Yes, but you'll need to ship your stuff with cygwin1.dll and other stuff.

[Ziks]

How can I change the mouse cursor type (eg to the hand) in .NET when I'm not developing a Windows Forms app?

[ROBO_DONUT]

[QUOTE=Map in a box;31367166]Didn't think about smart pointers. But still, not much overhead.[/QUOTE]
It's actually a buttload of overhead. Simple reference counting generally doesn't suffice, as you can have a reference loop and the memory will never be de-allocated. You either need some sort of loop detection heuristic or you need a full garbage collection system. Garbage collection, of course, means that your program will have to stop every so often to iterate through [i]each and every object[/i], mark, and sweep. Depending on the implementation, it could mean that your program comes to a complete grinding halt while the GC runs, or it could be distributed over a period of time (but still the same amount of net work).

[Night-Eagle]

Linking problem:
I'm trying to build a project that uses Gwen for Windows using MINGW on Linux. (Cross compile from Linux -> Windows)
Unfortunately, I must have missed a linker option and/or header file since some of the wide string functions aren't declared.

The first function not declared is _wtof.

include/Gwen/Controls/TextBoxNumeric.cpp: In member function ‘virtual float Gwen::Controls::TextBoxNumeric::GetFloatFromText()’:
include/Gwen/Controls/TextBoxNumeric.cpp:73: error: ‘_wtof’ was not declared in this scope

I thought _wtof would be in <stdio.h>, but it isn't there?

It is worth noting that the project builds fine for Linux natively.

[b]Update:[/b]

Is there a way to link with MSVCRT when cross compiling like this? I think that is where all these functions are defined.

[esalaka]

[QUOTE=Night-Eagle;31373291]I thought _wtof would be in <stdio.h>, but it isn't there?[/QUOTE]

It's in <stdlib.h>

[editline]28th July 2011[/editline]

It just might be that on Linux header shuffle causes something weird to happen.

Although on Windows the procedure to use wide characters is hilariously complicated. Waitaminute.

[editline]28th July 2011[/editline]

[url]http://en.wikibooks.org/wiki/Windows_Programming/Unicode[/url]

I know they meant good with that, but

I mean

damn

[Night-Eagle]

esalaka: MINGW supplies its own stdlib.h, so let me take a second look at that...

shane@s:/usr/i586-mingw32msvc/include$ grep "_wtof" *.h
shane@s:/usr/i586-mingw32msvc/include$ grep "_wtol" *.h
stdlib.h:_CRTIMP long __cdecl __MINGW_NOTHROW _wtol (const wchar_t *);
tchar.h:#define	_ttol		_wtol
shane@s:/usr/i586-mingw32msvc/include$ 

No luck. I've somehow convinced myself that the missing functions are in the MSVCRT dlls, however.

[esalaka]

MinGW is supposed to be header-compatible with VC so MSDN info should apply to it.

[Night-Eagle]

Anyone else cross compile Gwen for Windows from Linux? What libraries did you link to, and what version of MINGW are you using?

[Richy13]

[QUOTE=Night-Eagle;31374580]Anyone else cross compile Gwen for Windows from Linux? What libraries did you link to, and what version of MINGW are you using?[/QUOTE]

Cant you just commpile it on windows?

[Jookia]

Not all of us really want to use Windows.

[Night-Eagle]

[QUOTE=Richy19;31374951]Cant you just commpile it on windows?[/QUOTE]
I'd waste more time doing that than if I just rolled my own GUI.

I've already gotten Bullet Physics, glew, and FreeImage cross compiling.

[editline]27th July 2011[/editline]

I think I need to generate a .def or .h file for libmsvcr90.a using dlltool or something...

[larikang]

The following Ruby code works just fine:

f = File.new(ARGV.shift)
i = 0
f.each_byte {printf("%08X\n", i - 1) if (i += 1) % 16 == 1}
f.close

But this code doesn't. It has the exact same output as the above, however it doesn't exit. It does the each_byte loop and then hangs, using 100% CPU, until you kill the process.

f = File.new(ARGV.shift)
i = 0
f.each_byte {printf("%08X\n", f.pos - 1) if (i += 1) % 16 == 1}
f.close

The only difference is that the second, rather than using the variable i, uses the pos function, which returns the position of the file pointer.

WHY!?

[agnl]

How do I use a boolean operator in a class function definition?

[editline]27th July 2011[/editline]

Also, why am I getting this message? " [Linker error] undefined reference to `fraction::fraction(int, long)' "
Header:
[cpp]
class fraction
{
public:
void fraction();
fraction (int, long);
fraction AddedTo(fraction) const;
fraction Subtract(fraction) const;
fraction MultipliedBy(fraction) const;
fraction DividedBy(fraction) const;
bool isGreaterThan(fraction otherfraction) const;
bool isEqualTo(fraction otherfraction) const;
void print() const;
private:
int num;
long denom;
};
[/cpp]
Specification
[cpp]
#include <iostream>
#include "fraction.h"
using namespace std;

fraction::fraction()
{
num = 0;
denom = 1;
}

fraction fraction::AddedTo(fraction otherfraction) const
// Pre: Both operands have been initialized.
// Post: value + self is returned.
{
fraction result;
result.denom = denom * otherfraction.denom;
result.num = num * otherfraction.num;
return result;
}

void fraction::print() const
{
cout << num << "/" << denom;
}
[/cpp]
Initialization
[cpp]
#include <cstdlib>
#include <iostream>
#include "fraction.h"

using namespace std;

int main(int argc, char *argv[])
{
fraction f1(9,8);
fraction f2(2,3);
fraction result;

cout << "The sum of ";
f1.print();
cout << " and ";
f2.print();
cout << " is ";
result = f1.AddedTo(f2); //a class binary operation - function
result.print();
cout << endl;

system("PAUSE");
return EXIT_SUCCESS;
}
[/cpp]

[Jookia]

You define a method, line 5 of the first file. You don't implement it.

Also, you may want to try to overload operator+, that way instead of f1.AddedTo(f2), you can use f1 + f2.

[agnl]

[QUOTE=Jookia;31376518]You define a method, line 5 of the first file. You don't implement it.[/quote]
Explain what you mean by this?
[QUOTE=Jookia;31376518]
Also, you may want to try to overload operator+, that way instead of f1.AddedTo(f2), you can use f1 + f2.[/QUOTE]
Cant, the assignment forces me to use classes.

[Wyzard]

[QUOTE=ROBO_DONUT;31370263]Simple reference counting generally doesn't suffice, as you can have a reference loop and the memory will never be de-allocated. You either need some sort of loop detection heuristic or you need a full garbage collection system. Garbage collection, of course, means that your program will have to stop every so often to iterate through [i]each and every object[/i], mark, and sweep. Depending on the implementation, it could mean that your program comes to a complete grinding halt while the GC runs, or it could be distributed over a period of time (but still the same amount of net work).[/QUOTE]
What mark-and-sweep garbage-collecting smart pointer did you have in mind? My suggestions to Chrispy_645 were shared_ptr (which uses reference counting) and auto_ptr (which does even less).

[editline]27th July 2011[/editline]

[QUOTE=agnl;31376616]Cant, the assignment forces me to use classes.[/QUOTE]
You're still using classes, you're just naming the function "operator+" instead of "AddedTo".

[Jookia]

[QUOTE=agnl;31376616]Explain what you mean by this?[/QUOTE]

Line 5 of the first file you posted. Your class has a method, but it doesn't exist in the other files.

[Rìki]

Can someone help here please?
[url]http://stackoverflow.com/questions/6854461/serializing-xna-rectangle-with-json-net[/url]

It's about Json.NET
Why can't it serialize / deserialize rectangles correctly ?