[frameworks-kcoreaddons] [Bug 469078] New: KCoreAddons does not build on macOS

[Mikaela Szekely]

https://bugs.kde.org/show_bug.cgi?id=469078

            Bug ID: 469078
           Summary: KCoreAddons does not build on macOS
    Classification: Frameworks and Libraries
           Product: frameworks-kcoreaddons
           Version: 5.105.0
          Platform: Compiled Sources
                OS: macOS
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: mpyne at kde.org
          Reporter: mikaela.szekely at qyriad.me
                CC: kdelibs-bugs at kde.org
  Target Milestone: ---

Created attachment 158498
  --> https://bugs.kde.org/attachment.cgi?id=158498&action=edit
The full output of `cmake -B build && cmake --build build` on my macOS system

SUMMARY

KCoreAddons uses the `SOCK_CLOEXEC` flag, which is Linux-specific and not
available on macOS, causing compilation for macOS to fail with `use of
undeclared identifier: 'SOCK_CLOEXEC'` in src/lib/util/ksignalhandler.cpp.


STEPS TO REPRODUCE
1. Clone https://invent.kde.org/frameworks/kcoreaddons
2. Run `cmake -B build`
3. Run `cmake --build build`

OBSERVED RESULT
Build fails with:
/Users/qyriad/code/builds/kcoreaddons/src/lib/util/ksignalhandler.cpp:37:45:
error: use of undeclared identifier 'SOCK_CLOEXEC'
    if (::socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0,
KSignalHandlerPrivate::signalFd)) {



EXPECTED RESULT
Build completes successfully without error.

SOFTWARE/OS VERSIONS
macOS: 13.3.1 (x86_64)
KDE Frameworks Version: master, or 5.105.0
Qt Version: Qt6 and Qt5 both have the same result

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