From 21504ec27ae246eecc0bdf65504dec82258d74ec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Fri, 15 Nov 2024 16:51:09 +0200
Subject: [PATCH] IPC: Add missing includes of errno.h

These files use errno constants such as EACCES, while relying on
this header to be included implicitly.

If building with the latest libc++ versions, configured with
_LIBCPP_REMOVE_TRANSITIVE_INCLUDES=1 (which removes unnecessary
transitive includes from the public headers), one runs into this
error, where errno.h no longer is implicitly included through
other headers.

Prior to 762017f03ca530937dfe24cc822065e08111f985, these functions
were in separate files that explicitly did include errno.h.

Change-Id: I7b02f2ffa35b86606f6c173bf6a6d2917dbdc151
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
(cherry picked from commit 9f429468326e3d857c84276c4acb86d2e8e83279)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/corelib/ipc/qsharedmemory.cpp    | 1 +
 src/corelib/ipc/qsystemsemaphore.cpp | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/corelib/ipc/qsharedmemory.cpp b/src/corelib/ipc/qsharedmemory.cpp
index 02761c0263..e1ce735f89 100644
--- a/src/corelib/ipc/qsharedmemory.cpp
+++ b/src/corelib/ipc/qsharedmemory.cpp
@@ -12,6 +12,7 @@
 #ifdef Q_OS_WIN
 #  include <qt_windows.h>
 #endif
+#include <errno.h>
 
 #ifndef MAX_PATH
 #  define MAX_PATH PATH_MAX
diff --git a/src/corelib/ipc/qsystemsemaphore.cpp b/src/corelib/ipc/qsystemsemaphore.cpp
index 4c24ef6043..24f4789f97 100644
--- a/src/corelib/ipc/qsystemsemaphore.cpp
+++ b/src/corelib/ipc/qsystemsemaphore.cpp
@@ -6,6 +6,7 @@
 
 #if QT_CONFIG(systemsemaphore)
 #include <QtCore/q20memory.h>
+#include <errno.h>
 
 QT_BEGIN_NAMESPACE