Details
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Bug
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Resolution: Out of scope
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Not Evaluated
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None
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6.8.0
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None
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Windows
Description
When compiling version 6.8.0, I got this error message:
In file included from qt-build/include/QtCore/6.8.0/QtCore/private/qcore_unix_p.h:1, from qtbase-everywhere-src-6.8.0/src/corelib/global/qlogging.cpp:61: qtbase-everywhere-src-6.8.0/src/corelib/kernel/qcore_unix_p.h: In function ‘int qt_safe_pipe(int*, int)’: qtbase-everywhere-src-6.8.0/src/corelib/kernel/qcore_unix_p.h:233:14: error: ‘::pipe2’ has not been declared; did you mean ‘pipe’? 233 | return ::pipe2(pipefd, flags); // pipe2 is documented not to return EINTR | ^~~~~ | pipe
Actually, the error happens because pipe2() is available only when _GNU_SOURCE is defined:
https://man7.org/linux/man-pages/man2/pipe.2.html
CYGWIN doesn't define this macro by default, so this is reason because the error happens.
Unless it escaped to my attention, I have not found a way to define _GNU_SOURCE at configure time, so that macro probably just needs to be declared in the right source header, as it has been already done into other .h files.