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Subject:	Re: I cannot understand popen/_popen absence
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Date:	Sun, 29 Jan 2017 13:12:57 +0100
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Am 29.01.2017 um 02:16 schrieb Пётр Б.:
> I am trying to build Qt under Cygwin.

What keeps you from using the existing build? Or from at least looking 
at its source package to see how it was managed?

 > For some mysterious reason
> Cygwin compiler does not expose popen with std=c++11 which is required
> for Qt

I rather much doubt that this particular setting is required.  Nor is 
there much mystery about this: std=c++11 is an option that explicitly 
requires the compiler to disable _all_ extensions beyond ISO standard 
C++.  popen is part of the POSIX extensions, so it will be disabled.

> BUT
> at the same time the MinGW compiler installed from Cygwin repository
> does expose popen with same standard flag.

That might be a bug in MinGW, but more likely you overlooked another 
flag that re-enabled some extensions.


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