Fix compilation without sharedmemory

We have to enable qt_safe_ftok with either sharedmemory or
systemsemaphore. In order to make the resulting QT_CONFIG work with the
bootstrap library we switch the features off for bootstrapping. Some
tests and examples have to be excluded when sharedmemory is not
available.

Change-Id: I3fc3926d160202b378be2293fba40201a4bf50c5
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

examples/corelib/ipc/ipc.pro

@@ -1,6 +1,6 @@
 requires(qtHaveModule(widgets))
 
 TEMPLATE      = subdirs
-# no QSharedMemory
-!vxworks:!integrity: SUBDIRS = sharedmemory
+
+qtConfig(sharedmemory): SUBDIRS = sharedmemory
 qtHaveModule(network): SUBDIRS += localfortuneserver localfortuneclient

src/corelib/global/qconfig-bootstrapped.h

@@ -83,6 +83,8 @@
 #define QT_NO_TRANSLATION
 #define QT_FEATURE_translation -1
 #define QT_NO_GEOM_VARIANT
+#define QT_FEATURE_sharedmemory -1
+#define QT_FEATURE_systemsemaphore -1
 
 #ifdef QT_BUILD_QMAKE
 #define QT_FEATURE_commandlineparser -1

src/corelib/kernel/qcore_unix_p.h

@@ -370,7 +370,7 @@ union qt_semun {
 };
 
 #ifndef QT_POSIX_IPC
-#ifndef QT_NO_SHAREDMEMORY
+#if QT_CONFIG(sharedmemory) || QT_CONFIG(systemsemaphore)
 #ifndef Q_OS_ANDROID
 static inline key_t qt_safe_ftok(const QByteArray &filename, int proj_id)
 {
@@ -379,7 +379,7 @@ static inline key_t qt_safe_ftok(const QByteArray &filename, int proj_id)
     return ::ftok(filename.constData(), qHash(filename, proj_id));
 }
 #endif // !Q_OS_ANDROID
-#endif // !QT_NO_SHAREDMEMORY
+#endif // QT_CONFIG(sharedmemory) || QT_CONFIG(systemsemaphore)
 #endif // !QT_POSIX_IPC
 
 QT_END_NAMESPACE

tests/auto/corelib/kernel/qsharedmemory/qsharedmemory.pro

@@ -1,5 +1,6 @@
 TEMPLATE = subdirs
 
-!winrt: SUBDIRS = sharedmemoryhelper
-
-SUBDIRS += test
+qtConfig(sharedmemory) {
+    !winrt: SUBDIRS = sharedmemoryhelper
+    SUBDIRS += test
+}