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QPluginLoader: use constexpr variables for detecting debug plugins

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For MSVC it's clear that the plugin and Qt must match, since they would
be linking to different runtime assemblies otherwise. For all other
systems, including MinGW on Windows, there's no such thing.

But we insist on MinGW debug-and-release builds matching.

Change-Id: I3eb1bd30e0124f89a052fffd16a6aa52c7f8b9c0
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
This commit is contained in:
Thiago Macieira 2021-09-20 16:06:27 -07:00
parent 57d08f6c09
commit b64d720b28
1 changed files with 14 additions and 10 deletions
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24
src/corelib/plugin/qlibrary.cpp
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@ -49,6 +49,7 @@
#include <qjsondocument.h>
#include <qmap.h>
#include <qmutex.h>
#include <qoperatingsystemversion.h>
#include <qstringlist.h>
#ifdef Q_OS_MAC
@ -65,17 +66,22 @@
QT_BEGIN_NAMESPACE
// On Unix systema and on Windows with MinGW, we can mix and match debug and
// release plugins without problems. (unless compiled in debug-and-release mode
// - why?)
static constexpr bool PluginMustMatchQtDebug =
QOperatingSystemVersion::currentType() == QOperatingSystemVersion::Windows
#if defined(Q_CC_MINGW)
&& QT_CONFIG(debug_and_release)
#endif
;
#ifdef QT_NO_DEBUG
# define QLIBRARY_AS_DEBUG false
static constexpr bool QtBuildIsDebug = false;
#else
# define QLIBRARY_AS_DEBUG true
static constexpr bool QtBuildIsDebug = true;
#endif
#if defined(Q_OS_UNIX) || (defined(Q_CC_MINGW) && !QT_CONFIG(debug_and_release))
// We don't use separate debug and release libs on UNIX, so we want
// to allow loading plugins, regardless of how they were built.
# define QT_NO_DEBUG_PLUGIN_CHECK
#endif
/*!
\class QLibrary
@ -783,12 +789,10 @@ void QLibraryPrivate::updatePluginState()
.arg((qt_version&0xff00) >> 8)
.arg(qt_version&0xff)
.arg(debug ? QLatin1String("debug") : QLatin1String("release"));
#ifndef QT_NO_DEBUG_PLUGIN_CHECK
} else if (debug != QLIBRARY_AS_DEBUG) {
} else if (PluginMustMatchQtDebug && debug != QtBuildIsDebug) {
//don't issue a qWarning since we will hopefully find a non-debug? --Sam
errorString = QLibrary::tr("The plugin '%1' uses incompatible Qt library."
" (Cannot mix debug and release libraries.)").arg(fileName);
#endif
} else {
pluginState = IsAPlugin;
}