Bugfix: Default -uiplatform is not actually the platform this build was compiled on

src/qt/bitcoin.cpp

@@ -311,14 +311,8 @@ BitcoinApplication::BitcoinApplication(int &argc, char **argv):
     // UI per-platform customization
     // This must be done inside the BitcoinApplication constructor, or after it, because
     // PlatformStyle::instantiate requires a QApplication
-#if defined(Q_OS_MAC)
+    std::string platformName;
-    std::string platformName = "macosx";
+    platformName = GetArg("-uiplatform", BitcoinGUI::DEFAULT_UIPLATFORM);
-#elif defined(Q_OS_WIN)
-    std::string platformName = "windows";
-#else
-    std::string platformName = "other";
-#endif
-    platformName = GetArg("-uiplatform", platformName);
     platformStyle = PlatformStyle::instantiate(QString::fromStdString(platformName));
     if (!platformStyle) // Fall back to "other" if specified name not found
         platformStyle = PlatformStyle::instantiate("other");

src/qt/bitcoingui.cpp

@@ -59,6 +59,16 @@
 #include <QUrlQuery>
 #endif
 
+const std::string BitcoinGUI::DEFAULT_UIPLATFORM =
+#if defined(Q_OS_MAC)
+        "macosx"
+#elif defined(Q_OS_WIN)
+        "windows"
+#else
+        "other"
+#endif
+        ;
+
 const QString BitcoinGUI::DEFAULT_WALLET = "~Default";
 
 BitcoinGUI::BitcoinGUI(const PlatformStyle *platformStyle, const NetworkStyle *networkStyle, QWidget *parent) :

src/qt/bitcoingui.h

@@ -48,6 +48,7 @@ class BitcoinGUI : public QMainWindow
 
 public:
     static const QString DEFAULT_WALLET;
+    static const std::string DEFAULT_UIPLATFORM;
 
     explicit BitcoinGUI(const PlatformStyle *platformStyle, const NetworkStyle *networkStyle, QWidget *parent = 0);
     ~BitcoinGUI();

src/qt/utilitydialog.cpp

@@ -86,7 +86,7 @@ HelpMessageDialog::HelpMessageDialog(QWidget *parent, bool about) :
         strUsage += HelpMessageOpt("-splash", strprintf(_("Show splash screen on startup (default: %u)"), DEFAULT_SPLASHSCREEN));
         strUsage += HelpMessageOpt("-resetguisettings", _("Reset all settings changes made over the GUI"));
         if (showDebug) {
-            strUsage += HelpMessageOpt("-uiplatform", "Select platform to customize UI for (one of windows, macosx, other; default: platform compiled on)");
+            strUsage += HelpMessageOpt("-uiplatform", strprintf("Select platform to customize UI for (one of windows, macosx, other; default: %s)", BitcoinGUI::DEFAULT_UIPLATFORM));
         }
         QString coreOptions = QString::fromStdString(strUsage);
         text = version + "\n" + header + "\n" + coreOptions;