Some bugs that are preventing a successful build

When you try to build a GUI wallet on macOS according to the instructions (the CLI app works fine), it fails and the following is a snippet of the warnings and errors that are printed when building a GUI wallet:

qt/BGL.cpp:241:53: warning: 'QFlags' is deprecated: Use default constructor instead [-Wdeprecated-declarations]
SplashScreen *splash = new SplashScreen(m_node, nullptr, networkStyle);
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qflags.h:123:5: note: 'QFlags' has been explicitly marked deprecated here
QT_DEPRECATED_X("Use default constructor instead") Q_DECL_CONSTEXPR inline QFlags(Zero) noexcept : i(0) {}
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qglobal.h:294:33: note: expanded from macro 'QT_DEPRECATED_X'
# define QT_DEPRECATED_X(text) Q_DECL_DEPRECATED_X(text)
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qcompilerdetection.h:675:55: note: expanded from macro 'Q_DECL_DEPRECATED_X'
# define Q_DECL_DEPRECATED_X(text) __attribute__ ((__deprecated__(text)))
^
1 warning generated.
CXX qt/libBGLqt_a-BGLaddressvalidator.o
CXX qt/libBGLqt_a-BGLgui.o
qt/BGLgui.cpp:1267:29: warning: 'pixmap' is deprecated: Use the other overload which returns QPixmap by-value [-Wdeprecated-declarations]
if (labelProxyIcon->pixmap() == nullptr) {
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtWidgets.framework/Headers/qlabel.h:77:5: note: 'pixmap' has been explicitly marked deprecated here
QT_DEPRECATED_VERSION_X(5, 15, "Use the other overload which returns QPixmap by-value")
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qglobal.h:382:53: note: expanded from macro 'QT_DEPRECATED_VERSION_X'
#define QT_DEPRECATED_VERSION_X(major, minor, text) QT_DEPRECATED_VERSION_X_##major(minor, text)
^
:25:1: note: expanded from here
QT_DEPRECATED_VERSION_X_5
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qglobal.h:381:53: note: expanded from macro 'QT_DEPRECATED_VERSION_X_5'
#define QT_DEPRECATED_VERSION_X_5(minor, text) QT_DEPRECATED_VERSION_X_5_##minor(text)
^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qglobal.h:374:45: note: expanded from macro 'QT_DEPRECATED_VERSION_X_5_15'
# define QT_DEPRECATED_VERSION_X_5_15(text) QT_DEPRECATED_X(text)
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qglobal.h:294:33: note: expanded from macro 'QT_DEPRECATED_X'
# define QT_DEPRECATED_X(text) Q_DECL_DEPRECATED_X(text)
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qcompilerdetection.h:675:55: note: expanded from macro 'Q_DECL_DEPRECATED_X'
# define Q_DECL_DEPRECATED_X(text) __attribute__ ((__deprecated__(text)))
^
1 warning generated.
CXX qt/libBGLqt_a-clientmodel.o
CXX qt/libBGLqt_a-guiutil.o
qt/guiutil.cpp:81:22: warning: unused variable 'dummydata' [-Wunused-const-variable]
static const uint8_t dummydata[] = {0xeb,0x15,0x23,0x1d,0xfc,0xeb,0x60,0x92,0x58,0x86,0xb6,0x7d,0x06,0x52,0x99,0x92,0x59,0x15,0xae,0xb1,0x72,0xc0,0x66,0x47};
^
1 warning generated.
CXX qt/libBGLqt_a-intro.o
CXX qt/libBGLqt_a-modaloverlay.o
CXX qt/libBGLqt_a-notificator.o
CXX qt/libBGLqt_a-optionsdialog.o
CXX qt/libBGLqt_a-optionsmodel.o
qt/optionsmodel.cpp:221:59: warning: 'split' is deprecated: Use Qt::SplitBehavior variant instead [-Wdeprecated-declarations]
QStringList ip_port = settings.value(name).toString().split(":", QString::SkipEmptyParts);
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qstring.h:608:23: note: 'split' has been explicitly marked deprecated here
Q_REQUIRED_RESULT QT_DEPRECATED_VERSION_X_5_15("Use Qt::SplitBehavior variant instead")
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qglobal.h:374:45: note: expanded from macro 'QT_DEPRECATED_VERSION_X_5_15'
# define QT_DEPRECATED_VERSION_X_5_15(text) QT_DEPRECATED_X(text)
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qglobal.h:294:33: note: expanded from macro 'QT_DEPRECATED_X'
# define QT_DEPRECATED_X(text) Q_DECL_DEPRECATED_X(text)
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qcompilerdetection.h:675:55: note: expanded from macro 'Q_DECL_DEPRECATED_X'
# define Q_DECL_DEPRECATED_X(text) __attribute__ ((__deprecated__(text)))
^
1 warning generated.
CXX qt/libBGLqt_a-peertablemodel.o
CXX qt/libBGLqt_a-rpcconsole.o
CXX qt/libBGLqt_a-splashscreen.o
qt/splashscreen.cpp:43:9: warning: unused variable 'paddingTop' [-Wunused-variable]
int paddingTop = 490;
^
qt/splashscreen.cpp:45:9: warning: unused variable 'titleCopyrightVSpace' [-Wunused-variable]
int titleCopyrightVSpace = 22;
^
qt/splashscreen.cpp:42:9: warning: unused variable 'paddingRight' [-Wunused-variable]
int paddingRight = 14;
^
qt/splashscreen.cpp:44:9: warning: unused variable 'titleVersionVSpace' [-Wunused-variable]
int titleVersionVSpace = 17;
^
4 warnings generated.
CXX qt/libBGLqt_a-trafficgraphwidget.o
qt/trafficgraphwidget.cpp:55:13: error: member access into incomplete type 'QPainterPath'
path.moveTo(x, YMARGIN + h);
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
^
qt/trafficgraphwidget.cpp:59:17: error: member access into incomplete type 'QPainterPath'
path.lineTo(x, y);
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
^
qt/trafficgraphwidget.cpp:61:13: error: member access into incomplete type 'QPainterPath'
path.lineTo(x, YMARGIN + h);
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
^
qt/trafficgraphwidget.cpp:109:22: error: variable has incomplete type 'QPainterPath'
QPainterPath p;
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
^
qt/trafficgraphwidget.cpp:116:22: error: variable has incomplete type 'QPainterPath'
QPainterPath p;
^
/usr/local/Cellar/qt@5/5.15.2/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
^
5 errors generated.

Reproduce the GUI wallet build on macOS using the repository's build instructions, then inspect qt/trafficgraphwidget.cpp alongside the reported QPainterPath errors. Confirm the cause from the compiler output and verify that the GUI wallet build completes successfully without these errors.

Written by the indexing model from the issue text.