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Re: Missing /include/sys/stropts.h? [gold star alert]

On Fri, Mar 12, 2004 at 05:19:35PM -0000, Dave Korn wrote:
>> -----Original Message-----
>> From: cygwin-owner On Behalf Of Shawn Legrand
>> Sent: 12 March 2004 16:08
>> Should the file stropts.h exist on CygWin? 
>  You already answered that one yourself:
>>  I checked and there is no such file there or in 
>> any directory off of root or in the CVS source tree.
>  Anyway, you also asked:
>> If not - could I 
>> copy it from a Unix system (such as a MAC BSD (OS X)) and put 
>> it in CygWin?
>  That kind of game almost never works.  Sure, the initial compilation will
>succeed, or at least it won't error out with a missing file, but since
>whatever library functions or OS features the header file describes don't
>actually exist on your system, it isn't going to help any: it'll probably
>all fall apart at the final link stage.
>  BTW and FYI, here's the generic recipe for figuring out the answer to
>these sorts of question:
>  stropts.h (a moment's googling shows me) is related to POSIX streams
>  By searching for the keyword streams in the Posix spec at
> I found a few of
>the functions involved were fattach, fdetach, putmsg, putpmsg.
>  By searching in the cygwin api reference at
> I couldn't find any of those
>  So my deduction is that the POSIX streams functionality isn't implemented
>by cygwin and therefore it's no surprise the header isn't there.  
>  This also means that the program you are trying to compile depends on OS
>functionality that cygwin doesn't provide, and so porting it to cygwin will
>never be a simple configure'n'make.

Can we get a gold star over here for exemplary use of reasoning powers?

Thank you, Dave, for explaining how to think about problems like this.


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