Modernize the "thread" feature

Add it to configure.json and replace all occurrences of QT_NO_THREAD
with QT_CONFIG(thread). Add conditions for other features that depend
on thread support. Remove conditions where we can use the QMutex and
QThreadStorage stubs.

Change-Id: I284e5d794fda9a4c6f4a1ab29e55aa686272a0eb
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

26 files changed, 105 insertions, 149 deletions

diff --git a/src/corelib/thread/qmutex.cpp b/src/corelib/thread/qmutex.cpp
index 63fb6f3efb..3881ac017e 100644
--- a/src/corelib/thread/qmutex.cpp
+++ b/src/corelib/thread/qmutex.cpp
@@ -42,8 +42,6 @@
 #include "qplatformdefs.h"
 #include "qmutex.h"
 #include <qdebug.h>
-
-#ifndef QT_NO_THREAD
 #include "qatomic.h"
 #include "qelapsedtimer.h"
 #include "qthread.h"
@@ -739,5 +737,3 @@ QT_END_NAMESPACE
 #else
 #  include "qmutex_unix.cpp"
 #endif
-
-#endif // QT_NO_THREAD
diff --git a/src/corelib/thread/qmutex.h b/src/corelib/thread/qmutex.h
index 7cda53db5f..837355a602 100644
--- a/src/corelib/thread/qmutex.h
+++ b/src/corelib/thread/qmutex.h
@@ -54,7 +54,7 @@ class tst_QMutex;
 QT_BEGIN_NAMESPACE
 
 
-#if !defined(QT_NO_THREAD) || defined(Q_CLANG_QDOC)
+#if QT_CONFIG(thread) || defined(Q_CLANG_QDOC)
 
 #ifdef Q_OS_LINUX
 # define QT_MUTEX_LOCK_NOEXCEPT Q_DECL_NOTHROW
@@ -250,7 +250,7 @@ private:
     quintptr val;
 };
 
-#else // QT_NO_THREAD && !Q_CLANG_QDOC
+#else // !QT_CONFIG(thread) && !Q_CLANG_QDOC
 
 class Q_CORE_EXPORT QMutex
 {
@@ -301,7 +301,7 @@ private:
 
 typedef QMutex QBasicMutex;
 
-#endif // QT_NO_THREAD && !Q_CLANG_QDOC
+#endif // !QT_CONFIG(thread) && !Q_CLANG_QDOC
 
 QT_END_NAMESPACE
 
diff --git a/src/corelib/thread/qmutex_linux.cpp b/src/corelib/thread/qmutex_linux.cpp
index d3d97ea108..507e72cb76 100644
--- a/src/corelib/thread/qmutex_linux.cpp
+++ b/src/corelib/thread/qmutex_linux.cpp
@@ -40,8 +40,6 @@
 
 #include "qplatformdefs.h"
 #include "qmutex.h"
-
-#ifndef QT_NO_THREAD
 #include "qatomic.h"
 #include "qmutex_p.h"
 #include "qfutex_p.h"
@@ -54,7 +52,6 @@
 #  define FUTEX_PRIVATE_FLAG    0
 #endif
 
-
 QT_BEGIN_NAMESPACE
 
 using namespace QtFutex;
@@ -183,5 +180,3 @@ void QBasicMutex::unlockInternal() Q_DECL_NOTHROW
 }
 
 QT_END_NAMESPACE
-
-#endif // QT_NO_THREAD
diff --git a/src/corelib/thread/qmutex_mac.cpp b/src/corelib/thread/qmutex_mac.cpp
index 67498611c9..9a8d9bc750 100644
--- a/src/corelib/thread/qmutex_mac.cpp
+++ b/src/corelib/thread/qmutex_mac.cpp
@@ -39,9 +39,6 @@
 
 #include "qplatformdefs.h"
 #include "qmutex.h"
-
-#if !defined(QT_NO_THREAD)
-
 #include "qmutex_p.h"
 
 #include <mach/mach.h>
@@ -89,5 +86,3 @@ void QMutexPrivate::wakeUp() Q_DECL_NOTHROW
 
 
 QT_END_NAMESPACE
-
-#endif //QT_NO_THREAD
diff --git a/src/corelib/thread/qmutex_unix.cpp b/src/corelib/thread/qmutex_unix.cpp
index 91f02ba3ec..3ee24a292c 100644
--- a/src/corelib/thread/qmutex_unix.cpp
+++ b/src/corelib/thread/qmutex_unix.cpp
@@ -42,8 +42,6 @@
 #include "qmutex.h"
 #include "qstring.h"
 #include "qelapsedtimer.h"
-
-#ifndef QT_NO_THREAD
 #include "qatomic.h"
 #include "qmutex_p.h"
 #include <errno.h>
@@ -159,5 +157,3 @@ void QMutexPrivate::wakeUp() Q_DECL_NOTHROW
 #endif
 
 QT_END_NAMESPACE
-
-#endif // QT_NO_THREAD
diff --git a/src/corelib/thread/qmutexpool.cpp b/src/corelib/thread/qmutexpool.cpp
index 90b6989467..3f9e8da942 100644
--- a/src/corelib/thread/qmutexpool.cpp
+++ b/src/corelib/thread/qmutexpool.cpp
@@ -40,8 +40,6 @@
 #include "qatomic.h"
 #include "qmutexpool_p.h"
 
-#ifndef QT_NO_THREAD
-
 QT_BEGIN_NAMESPACE
 
 Q_GLOBAL_STATIC_WITH_ARGS(QMutexPool, globalMutexPool, (QMutex::Recursive))
@@ -148,5 +146,3 @@ QMutex *QMutexPool::globalInstanceGet(const void *address)
 }
 
 QT_END_NAMESPACE
-
-#endif // QT_NO_THREAD
diff --git a/src/corelib/thread/qmutexpool_p.h b/src/corelib/thread/qmutexpool_p.h
index 58d853b0e3..89d006ac29 100644
--- a/src/corelib/thread/qmutexpool_p.h
+++ b/src/corelib/thread/qmutexpool_p.h
@@ -56,7 +56,7 @@
 #include "QtCore/qmutex.h"
 #include "QtCore/qvarlengtharray.h"
 
-#ifndef QT_NO_THREAD
+QT_REQUIRE_CONFIG(thread);
 
 QT_BEGIN_NAMESPACE
 
@@ -85,6 +85,4 @@ private:
 
 QT_END_NAMESPACE
 
-#endif // QT_NO_THREAD
-
 #endif // QMUTEXPOOL_P_H
diff --git a/src/corelib/thread/qreadwritelock.cpp b/src/corelib/thread/qreadwritelock.cpp
index 42befc4b80..21835ff592 100644
--- a/src/corelib/thread/qreadwritelock.cpp
+++ b/src/corelib/thread/qreadwritelock.cpp
@@ -42,7 +42,6 @@
 #include "qplatformdefs.h"
 #include "qreadwritelock.h"
 
-#ifndef QT_NO_THREAD
 #include "qmutex.h"
 #include "qthread.h"
 #include "qwaitcondition.h"
@@ -781,5 +780,3 @@ void QReadWriteLockPrivate::release()
 */
 
 QT_END_NAMESPACE
-
-#endif // QT_NO_THREAD
diff --git a/src/corelib/thread/qreadwritelock.h b/src/corelib/thread/qreadwritelock.h
index ecdb98f2f5..65fa76fd6d 100644
--- a/src/corelib/thread/qreadwritelock.h
+++ b/src/corelib/thread/qreadwritelock.h
@@ -45,7 +45,7 @@
 QT_BEGIN_NAMESPACE
 
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 class QReadWriteLockPrivate;
 
@@ -174,7 +174,7 @@ inline QWriteLocker::QWriteLocker(QReadWriteLock *areadWriteLock)
 #pragma warning( pop )
 #endif
 
-#else // QT_NO_THREAD
+#else // QT_CONFIG(thread)
 
 class Q_CORE_EXPORT QReadWriteLock
 {
@@ -225,7 +225,7 @@ private:
     Q_DISABLE_COPY(QWriteLocker)
 };
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 QT_END_NAMESPACE
 
diff --git a/src/corelib/thread/qreadwritelock_p.h b/src/corelib/thread/qreadwritelock_p.h
index a01d010043..31da2401c0 100644
--- a/src/corelib/thread/qreadwritelock_p.h
+++ b/src/corelib/thread/qreadwritelock_p.h
@@ -56,7 +56,7 @@
 #include <QtCore/qhash.h>
 #include <QtCore/qwaitcondition.h>
 
-#ifndef QT_NO_THREAD
+QT_REQUIRE_CONFIG(thread);
 
 QT_BEGIN_NAMESPACE
 
@@ -99,6 +99,4 @@ public:
 
 QT_END_NAMESPACE
 
-#endif // QT_NO_THREAD
-
 #endif // QREADWRITELOCK_P_H
diff --git a/src/corelib/thread/qsemaphore.cpp b/src/corelib/thread/qsemaphore.cpp
index 82d439a728..bb578ff617 100644
--- a/src/corelib/thread/qsemaphore.cpp
+++ b/src/corelib/thread/qsemaphore.cpp
@@ -39,8 +39,6 @@
 ****************************************************************************/
 
 #include "qsemaphore.h"
-
-#ifndef QT_NO_THREAD
 #include "qmutex.h"
 #include "qfutex_p.h"
 #include "qwaitcondition.h"
@@ -646,5 +644,3 @@ bool QSemaphore::tryAcquire(int n, int timeout)
 
 
 QT_END_NAMESPACE
-
-#endif // QT_NO_THREAD
diff --git a/src/corelib/thread/qsemaphore.h b/src/corelib/thread/qsemaphore.h
index 2639085e99..b830ff1bfd 100644
--- a/src/corelib/thread/qsemaphore.h
+++ b/src/corelib/thread/qsemaphore.h
@@ -42,10 +42,9 @@
 
 #include <QtCore/qglobal.h>
 
-QT_BEGIN_NAMESPACE
-
+QT_REQUIRE_CONFIG(thread);
 
-#ifndef QT_NO_THREAD
+QT_BEGIN_NAMESPACE
 
 class QSemaphorePrivate;
 
@@ -113,8 +112,6 @@ private:
     int m_n;
 };
 
-#endif // QT_NO_THREAD
-
 QT_END_NAMESPACE
 
 #endif // QSEMAPHORE_H
diff --git a/src/corelib/thread/qthread.cpp b/src/corelib/thread/qthread.cpp
index f784bf5cb6..a4101764bc 100644
--- a/src/corelib/thread/qthread.cpp
+++ b/src/corelib/thread/qthread.cpp
@@ -103,7 +103,7 @@ QThreadData::~QThreadData()
 
 void QThreadData::ref()
 {
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
     (void) _ref.ref();
     Q_ASSERT(_ref.load() != 0);
 #endif
@@ -111,7 +111,7 @@ void QThreadData::ref()
 
 void QThreadData::deref()
 {
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
     if (!_ref.deref())
         delete this;
 #endif
@@ -134,7 +134,7 @@ QAdoptedThread::QAdoptedThread(QThreadData *data)
 {
     // thread should be running and not finished for the lifetime
     // of the application (even if QCoreApplication goes away)
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
     d_func()->running = true;
     d_func()->finished = false;
     init();
@@ -148,7 +148,7 @@ QAdoptedThread::~QAdoptedThread()
     // fprintf(stderr, "~QAdoptedThread = %p\n", this);
 }
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 void QAdoptedThread::run()
 {
     // this function should never be called
@@ -756,7 +756,7 @@ int QThread::loopLevel() const
     return d->data->eventLoops.size();
 }
 
-#else // QT_NO_THREAD
+#else // QT_CONFIG(thread)
 
 QThread::QThread(QObject *parent)
     : QObject(*(new QThreadPrivate), parent)
@@ -813,7 +813,7 @@ QThreadPrivate::~QThreadPrivate()
     delete data;
 }
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 /*!
     \since 5.0
@@ -850,7 +850,7 @@ void QThread::setEventDispatcher(QAbstractEventDispatcher *eventDispatcher)
     }
 }
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 /*!
     \reimp
@@ -1015,7 +1015,7 @@ QDaemonThread::~QDaemonThread()
 {
 }
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 QT_END_NAMESPACE
 
diff --git a/src/corelib/thread/qthread.h b/src/corelib/thread/qthread.h
index 83c3329cc0..d0ffd9f909 100644
--- a/src/corelib/thread/qthread.h
+++ b/src/corelib/thread/qthread.h
@@ -66,7 +66,7 @@ class QThreadData;
 class QThreadPrivate;
 class QAbstractEventDispatcher;
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 class Q_CORE_EXPORT QThread : public QObject
 {
     Q_OBJECT
@@ -239,7 +239,7 @@ QThread *QThread::create(Function &&f)
 
 #endif // QT_CONFIG(cxx11_future)
 
-#else // QT_NO_THREAD
+#else // QT_CONFIG(thread)
 
 class Q_CORE_EXPORT QThread : public QObject
 {
@@ -267,7 +267,7 @@ private:
     Q_DECLARE_PRIVATE(QThread)
 };
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 QT_END_NAMESPACE
 
diff --git a/src/corelib/thread/qthread_p.h b/src/corelib/thread/qthread_p.h
index 93f245ff6e..22a0669032 100644
--- a/src/corelib/thread/qthread_p.h
+++ b/src/corelib/thread/qthread_p.h
@@ -57,7 +57,9 @@
 #include "QtCore/qthread.h"
 #include "QtCore/qmutex.h"
 #include "QtCore/qstack.h"
+#if QT_CONFIG(thread)
 #include "QtCore/qwaitcondition.h"
+#endif
 #include "QtCore/qmap.h"
 #include "QtCore/qcoreapplication.h"
 #include "private/qobject_p.h"
@@ -141,7 +143,7 @@ private:
     using QVector<QPostEvent>::insert;
 };
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 class Q_CORE_EXPORT QDaemonThread : public QThread
 {
@@ -210,7 +212,7 @@ public:
     }
 };
 
-#else // QT_NO_THREAD
+#else // QT_CONFIG(thread)
 
 class QThreadPrivate : public QObjectPrivate
 {
@@ -231,7 +233,7 @@ public:
     Q_DECLARE_PUBLIC(QThread)
 };
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 class QThreadData
 {
@@ -327,7 +329,7 @@ public:
     void init();
 
 private:
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
     void run() override;
 #endif
 };
diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp
index 0b3c7ddf10..329caa02ba 100644
--- a/src/corelib/thread/qthread_unix.cpp
+++ b/src/corelib/thread/qthread_unix.cpp
@@ -103,7 +103,7 @@
 
 QT_BEGIN_NAMESPACE
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 Q_STATIC_ASSERT(sizeof(pthread_t) <= sizeof(Qt::HANDLE));
 
@@ -270,7 +270,7 @@ extern "C" {
 typedef void*(*QtThreadCallback)(void*);
 }
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 QAbstractEventDispatcher *QThreadPrivate::createEventDispatcher(QThreadData *data)
 {
@@ -295,7 +295,7 @@ QAbstractEventDispatcher *QThreadPrivate::createEventDispatcher(QThreadData *dat
 #endif
 }
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 #if (defined(Q_OS_LINUX) || defined(Q_OS_MAC) || defined(Q_OS_QNX))
 static void setCurrentThreadName(const char *name)
@@ -513,7 +513,7 @@ void QThread::yieldCurrentThread()
     sched_yield();
 }
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 static timespec makeTimespec(time_t secs, long nsecs)
 {
@@ -538,7 +538,7 @@ void QThread::usleep(unsigned long usecs)
     qt_nanosleep(makeTimespec(usecs / 1000 / 1000, usecs % (1000*1000) * 1000));
 }
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 #ifdef QT_HAS_THREAD_PRIORITY_SCHEDULING
 #if defined(Q_OS_QNX)
@@ -839,7 +839,7 @@ void QThreadPrivate::setPriority(QThread::Priority threadPriority)
 #endif
 }
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 QT_END_NAMESPACE
 
diff --git a/src/corelib/thread/qthread_win.cpp b/src/corelib/thread/qthread_win.cpp
index 83bcb7d751..57ae671897 100644
--- a/src/corelib/thread/qthread_win.cpp
+++ b/src/corelib/thread/qthread_win.cpp
@@ -63,7 +63,7 @@
 
 QT_BEGIN_NAMESPACE
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 #ifdef Q_OS_WINRT
 inline DWORD qWinRTTlsAlloc() {
@@ -330,7 +330,7 @@ void qt_set_thread_name(HANDLE threadId, LPCSTR threadName)
  ** QThreadPrivate
  *************************************************************************/
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 QAbstractEventDispatcher *QThreadPrivate::createEventDispatcher(QThreadData *data)
 {
@@ -342,7 +342,7 @@ QAbstractEventDispatcher *QThreadPrivate::createEventDispatcher(QThreadData *dat
 #endif
 }
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 unsigned int __stdcall QT_ENSURE_STACK_ALIGNED_FOR_SSE QThreadPrivate::start(void *arg) Q_DECL_NOEXCEPT
 {
@@ -444,7 +444,7 @@ void QThread::yieldCurrentThread()
 #endif
 }
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 void QThread::sleep(unsigned long secs)
 {
@@ -461,7 +461,7 @@ void QThread::usleep(unsigned long usecs)
     ::Sleep((usecs / 1000) + 1);
 }
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 void QThread::start(Priority priority)
 {
@@ -699,6 +699,6 @@ void QThreadPrivate::setPriority(QThread::Priority threadPriority)
     }
 }
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 QT_END_NAMESPACE
diff --git a/src/corelib/thread/qthreadpool.cpp b/src/corelib/thread/qthreadpool.cpp
index 157cbeaf4d..ea2c611082 100644
--- a/src/corelib/thread/qthreadpool.cpp
+++ b/src/corelib/thread/qthreadpool.cpp
@@ -43,8 +43,6 @@
 
 #include <algorithm>
 
-#ifndef QT_NO_THREAD
-
 QT_BEGIN_NAMESPACE
 
 Q_GLOBAL_STATIC(QThreadPool, theInstance)
@@ -730,5 +728,3 @@ void QThreadPool::cancel(QRunnable *runnable)
 QT_END_NAMESPACE
 
 #include "moc_qthreadpool.cpp"
-
-#endif
diff --git a/src/corelib/thread/qthreadpool.h b/src/corelib/thread/qthreadpool.h
index 606e192768..cd27b7c08a 100644
--- a/src/corelib/thread/qthreadpool.h
+++ b/src/corelib/thread/qthreadpool.h
@@ -45,7 +45,7 @@
 #include <QtCore/qthread.h>
 #include <QtCore/qrunnable.h>
 
-#ifndef QT_NO_THREAD
+QT_REQUIRE_CONFIG(thread);
 
 QT_BEGIN_NAMESPACE
 
@@ -97,6 +97,4 @@ public:
 
 QT_END_NAMESPACE
 
-#endif // QT_NO_THREAD
-
 #endif
diff --git a/src/corelib/thread/qthreadpool_p.h b/src/corelib/thread/qthreadpool_p.h
index d03ba9d77f..0e6a00d243 100644
--- a/src/corelib/thread/qthreadpool_p.h
+++ b/src/corelib/thread/qthreadpool_p.h
@@ -59,7 +59,7 @@
 #include "QtCore/qqueue.h"
 #include "private/qobject_p.h"
 
-#ifndef QT_NO_THREAD
+QT_REQUIRE_CONFIG(thread);
 
 QT_BEGIN_NAMESPACE
 
@@ -184,5 +184,4 @@ public:
 
 QT_END_NAMESPACE
 
-#endif // QT_NO_THREAD
 #endif
diff --git a/src/corelib/thread/qthreadstorage.cpp b/src/corelib/thread/qthreadstorage.cpp
index c0b523a431..8b82118a5c 100644
--- a/src/corelib/thread/qthreadstorage.cpp
+++ b/src/corelib/thread/qthreadstorage.cpp
@@ -39,7 +39,6 @@
 
 #include "qthreadstorage.h"
 
-#ifndef QT_NO_THREAD
 #include "qthread.h"
 #include "qthread_p.h"
 #include "qmutex.h"
@@ -323,6 +322,4 @@ void QThreadStorageData::finish(void **p)
     \sa localData(), hasLocalData()
 */
 
-#endif // QT_NO_THREAD
-
 QT_END_NAMESPACE
diff --git a/src/corelib/thread/qthreadstorage.h b/src/corelib/thread/qthreadstorage.h
index 9a91883de8..d556e33c57 100644
--- a/src/corelib/thread/qthreadstorage.h
+++ b/src/corelib/thread/qthreadstorage.h
@@ -42,7 +42,7 @@
 
 #include <QtCore/qglobal.h>
 
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 QT_BEGIN_NAMESPACE
 
@@ -152,7 +152,7 @@ public:
 
 QT_END_NAMESPACE
 
-#else // !QT_NO_THREAD
+#else // !QT_CONFIG(thread)
 
 #include <qscopedpointer.h>
 
@@ -227,6 +227,6 @@ public:
     }
 };
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 #endif // QTHREADSTORAGE_H
diff --git a/src/corelib/thread/qwaitcondition.h b/src/corelib/thread/qwaitcondition.h
index e42efbdfca..11520e4cfe 100644
--- a/src/corelib/thread/qwaitcondition.h
+++ b/src/corelib/thread/qwaitcondition.h
@@ -46,8 +46,7 @@
 
 QT_BEGIN_NAMESPACE
 
-
-#ifndef QT_NO_THREAD
+#if QT_CONFIG(thread)
 
 class QDeadlineTimer;
 class QWaitConditionPrivate;
@@ -98,7 +97,7 @@ public:
     void wakeAll() {}
 };
 
-#endif // QT_NO_THREAD
+#endif // QT_CONFIG(thread)
 
 QT_END_NAMESPACE
 
diff --git a/src/corelib/thread/qwaitcondition_unix.cpp b/src/corelib/thread/qwaitcondition_unix.cpp
index 9706be1504..c93328b4bc 100644
--- a/src/corelib/thread/qwaitcondition_unix.cpp
+++ b/src/corelib/thread/qwaitcondition_unix.cpp
@@ -56,8 +56,6 @@
 #include <sys/time.h>
 #include <time.h>
 
-#ifndef QT_NO_THREAD
-
 QT_BEGIN_NAMESPACE
 
 #ifdef Q_OS_ANDROID
@@ -264,5 +262,3 @@ bool QWaitCondition::wait(QReadWriteLock *readWriteLock, QDeadlineTimer deadline
 }
 
 QT_END_NAMESPACE
-
-#endif // QT_NO_THREAD
diff --git a/src/corelib/thread/qwaitcondition_win.cpp b/src/corelib/thread/qwaitcondition_win.cpp
index 61e4c2bcb1..534456a935 100644
--- a/src/corelib/thread/qwaitcondition_win.cpp
+++ b/src/corelib/thread/qwaitcondition_win.cpp
@@ -45,8 +45,6 @@
 #include "qlist.h"
 #include "qalgorithms.h"
 
-#ifndef QT_NO_THREAD
-
 #define Q_MUTEX_T void*
 #include <private/qmutex_p.h>
 #include <private/qreadwritelock_p.h>
@@ -247,4 +245,3 @@ void QWaitCondition::wakeAll()
 }
 
 QT_END_NAMESPACE
-#endif // QT_NO_THREAD
diff --git a/src/corelib/thread/thread.pri b/src/corelib/thread/thread.pri
index dae72564b4..22f0de0523 100644
--- a/src/corelib/thread/thread.pri
+++ b/src/corelib/thread/thread.pri
@@ -1,38 +1,66 @@
 # Qt core thread module
 
-# public headers
-HEADERS += thread/qmutex.h \
-           thread/qrunnable.h \
-           thread/qreadwritelock.h \
-           thread/qsemaphore.h \
-           thread/qthread.h \
-           thread/qthreadpool.h \
-           thread/qthreadstorage.h \
-           thread/qwaitcondition.h \
-           thread/qatomic.h \
-           thread/qatomic_bootstrap.h \
-           thread/qatomic_cxx11.h \
-           thread/qbasicatomic.h \
-           thread/qgenericatomic.h
+HEADERS += \
+    thread/qmutex.h \
+    thread/qreadwritelock.h \
+    thread/qrunnable.h \
+    thread/qthread.h \
+    thread/qthreadstorage.h \
+    thread/qwaitcondition.h
 
-# private headers
-HEADERS += thread/qmutex_p.h \
-           thread/qmutexpool_p.h \
-           thread/qfutex_p.h \
-           thread/qorderedmutexlocker_p.h \
-           thread/qreadwritelock_p.h \
-           thread/qthread_p.h \
-           thread/qthreadpool_p.h
+SOURCES += \
+    thread/qrunnable.cpp \
+    thread/qthread.cpp
 
-SOURCES += thread/qatomic.cpp \
-           thread/qmutex.cpp \
-           thread/qreadwritelock.cpp \
-           thread/qrunnable.cpp \
-           thread/qmutexpool.cpp \
-           thread/qsemaphore.cpp \
-           thread/qthread.cpp \
-           thread/qthreadpool.cpp \
-           thread/qthreadstorage.cpp
+win32 {
+    HEADERS += thread/qatomic_msvc.h
+
+    SOURCES += thread/qthread_win.cpp
+} else {
+    SOURCES += thread/qthread_unix.cpp
+}
+
+qtConfig(thread) {
+    HEADERS += \
+        thread/qatomic.h \
+        thread/qatomic_bootstrap.h \
+        thread/qatomic_cxx11.h \
+        thread/qbasicatomic.h \
+        thread/qfutex_p.h \
+        thread/qgenericatomic.h \
+        thread/qmutexpool_p.h \
+        thread/qmutex_p.h \
+        thread/qorderedmutexlocker_p.h \
+        thread/qreadwritelock_p.h \
+        thread/qsemaphore.h \
+        thread/qthreadpool.h \
+        thread/qthreadpool_p.h \
+        thread/qthread_p.h
+
+    SOURCES += \
+       thread/qatomic.cpp \
+       thread/qmutex.cpp \
+       thread/qmutexpool.cpp \
+       thread/qreadwritelock.cpp \
+       thread/qsemaphore.cpp \
+       thread/qthreadpool.cpp \
+       thread/qthreadstorage.cpp
+
+    win32 {
+        SOURCES += \
+            thread/qmutex_win.cpp \
+            thread/qwaitcondition_win.cpp
+    } else {
+        darwin {
+            SOURCES += thread/qmutex_mac.cpp
+        } else: linux {
+            SOURCES += thread/qmutex_linux.cpp
+        } else {
+            SOURCES += thread/qmutex_unix.cpp
+        }
+        SOURCES += thread/qwaitcondition_unix.cpp
+    }
+}
 
 qtConfig(future) {
     HEADERS += \
@@ -52,24 +80,4 @@ qtConfig(future) {
         thread/qresultstore.cpp
 }
 
-win32 {
-    HEADERS += thread/qatomic_msvc.h
-
-    SOURCES += \
-        thread/qmutex_win.cpp \
-        thread/qthread_win.cpp \
-        thread/qwaitcondition_win.cpp
-} else {
-    darwin {
-        SOURCES += thread/qmutex_mac.cpp
-    } else: linux {
-        SOURCES += thread/qmutex_linux.cpp
-    } else {
-        SOURCES += thread/qmutex_unix.cpp
-    }
-    SOURCES += \
-        thread/qthread_unix.cpp \
-        thread/qwaitcondition_unix.cpp
-}
-
 qtConfig(std-atomic64): QMAKE_USE += libatomic