Cygwin for chess

[jarkkop]

Remember to install MS SDK that includes header files, like windows.h

[brianr]

Also, both VC++ express and gcc/Cygwin only produce 32 bit code.

Visual Studio 2008 Express does generate 64 bit code if the SDK has also been installed,
and a few menu options are properly set. See:

http://64.68.157.89/forum/viewtopic.php ... =&start=10

[Aleks Peshkov]

Beware that Cygwin is problematic for releasing non-GPL code. I suggest to use MinGW alternative.

[oysteijo]

As some other responders have said: You should use MinGW.

The difference of Cygwin compiled executables and and MinGW executables is that Cygwin will link to a dynamic library cygwin1.dll (or something like that). Cygwin emulates a full (?) POSIX layer and all those things are inside this this dll.

MinGW executables link to msvcrt.dll.

-Øystein

[beachknight]

As some other responders have said: You should use MinGW.

The difference of Cygwin compiled executables and and MinGW executables is that Cygwin will link to a dynamic library cygwin1.dll (or something like that). Cygwin emulates a full (?) POSIX layer and all those things are inside this this dll.

MinGW executables link to msvcrt.dll.

-Øystein

and perhaps a question for general interest:

Where to find latest cygwin1.dll & msvcrt.dll files
for w32 and x64 OSs, ie XP & Vista?

Best,

[Eizenhammer]

Where to find latest cygwin1.dll & msvcrt.dll files
for w32 and x64 OSs, ie XP & Vista?

Best,

The homepage of the cygwin project is here:
http://www.cygwin.com/

and the msvcrt should be part of your Windows.

[Dann Corbit]

As some other responders have said: You should use MinGW.

The difference of Cygwin compiled executables and and MinGW executables is that Cygwin will link to a dynamic library cygwin1.dll (or something like that). Cygwin emulates a full (?) POSIX layer and all those things are inside this this dll.

MinGW executables link to msvcrt.dll.

-Øystein

It is important to note that Cygwin has capabilities that Mingw lacks. For instance, fork() is not present in Mingw but it is in Cygwin.

[beachknight]

Where to find latest cygwin1.dll & msvcrt.dll files
for w32 and x64 OSs, ie XP & Vista?

Best,

The homepage of the cygwin project is here:
http://www.cygwin.com/

and the msvcrt should be part of your Windows.

Thanks for general answer.

To find cygwin1.dll in http://www.cygwin.com/ for layman is not easy.

I may therefore give a direct link to Arena website:

http://www.playwitharena.com/

MS VC/VCpp rt libs are being updated frequently.
Perhaps, a download file which includes all 50, 60,
70, 71, 80, 90 etc files would be very useful.

Best,

[Onno Garms]

My own code does not contain any such things. I do not know about include-library headers, of course, but apart from reading the clock and standard i/o (from which my engine refrains during search), I do not call any routines I did not write myself.

To query the timer you will have to know your OS:
- Either you query the Windows timer and compile with -mno-cygwin or with Visual Studio
- or you query the Unix timer and compile without -mno-cygwin.

To read input during search, you would have to probe for input without blocking or use threads. Both require OS access in the end.

I thought the -mno-cygwin compile would just link as subroutines in the executable what otherwise would be in the DLL.

To my knowledge, -mno-cygwin does not link against cygwin1 (.lib?) statically. (Btw. - unless you buy a commercial Cygwin lincense - this would make your executable depend on the GPL like it does when compling without -mno-cygwin.) -mno-cygwin makes the executable not to use cygwin1.dll at all.

-mno-cygwin has heavy implications on how your code must be written. With -mno-cygwin, you access Windows directly. Without, you feel like in a Unix environment. Maybe you didn't notice because you access the OS only for timing.

[Onno Garms]

Also, both VC++ express and gcc/Cygwin only produce 32 bit code.

Visual Studio 2008 Express does generate 64 bit code if the SDK has also been installed,
and a few menu options are properly set. See:

http://64.68.157.89/forum/viewtopic.php ... =&start=10

Cool, thanks a lot for that hint.