Backport Qt patch for fixing font weights on macOS mojave

patches/fix_mojave_font_weights_in_qt_5.6.patch

@@ -0,0 +1,15 @@
+--- ./qtbase/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm.orig	2018-10-18 10:36:55.016457121 +0530
++++ ./qtbase/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm	2018-10-18 10:37:26.469615885 +0530
+@@ -300,9 +300,9 @@ static void getFontDescription(CTFontDes
+
+     if (styles) {
+         if (CFNumberRef weightValue = (CFNumberRef) CFDictionaryGetValue(styles, kCTFontWeightTrait)) {
+-            float normalizedWeight;
+-            if (CFNumberGetValue(weightValue, kCFNumberFloatType, &normalizedWeight))
+-                fd->weight = QCoreTextFontEngine::qtWeightFromCFWeight(normalizedWeight);
++            double normalizedWeight;
++            if (CFNumberGetValue(weightValue, kCFNumberFloat64Type, &normalizedWeight))
++                fd->weight = QCoreTextFontEngine::qtWeightFromCFWeight(float(normalizedWeight));
+         }
+         if (CFNumberRef italic = (CFNumberRef) CFDictionaryGetValue(styles, kCTFontSlantTrait)) {
+             double d;

scripts/pkgs/qt.py

@@ -8,7 +8,7 @@
 import shutil
 
 from .constants import CFLAGS, LDFLAGS, MAKEOPTS, build_dir, isosx, islinux, LIBDIR, iswindows, PREFIX
-from .utils import run, run_shell, replace_in_file, ModifiedEnv, current_env
+from .utils import apply_patch, run, run_shell, replace_in_file, ModifiedEnv, current_env
 
 
 def main(args):
@@ -29,6 +29,7 @@ def main(args):
             r'''searchOrder << (QFileInfo(qAppFileName()).path().replace(QLatin1Char('/'), QLatin1Char('\\')) + QString::fromLatin1("\\app\\DLLs\\"));''')
     cflags, ldflags = CFLAGS, LDFLAGS
     if isosx:
+        apply_patch('fix_mojave_font_weights_in_qt_5.6.patch')
         ldflags = '-L' + LIBDIR
         # The following is needed as without it the Qt build system does not add the
         # necessary -stdlib=libc++ when linking. Probably, you can get rid of