build: replace FreeType back-compat sed with a patch in qt package

depends/packages/qt.mk

@@ -11,6 +11,7 @@ $(package)_qt_libs=corelib network widgets gui plugins testlib
 $(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch
 $(package)_patches+= fix_rcc_determinism.patch fix_riscv64_arch.patch xkb-default.patch no-xlib.patch
 $(package)_patches+= fix_android_qmake_conf.patch fix_android_jni_static.patch dont_hardcode_pwd.patch
+$(package)_patches+= freetype_back_compat.patch
 
 # Update OSX_QT_TRANSLATIONS when this is updated
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
@@ -192,7 +193,7 @@ define $(package)_extract_cmds
 endef
 
 define $(package)_preprocess_cmds
-  sed -i.old "s|FT_Get_Font_Format|FT_Get_X11_Font_Format|" qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp && \
+  patch -p1 -i $($(package)_patch_dir)/freetype_back_compat.patch && \
   sed -i.old "s|updateqm.commands = \$$$$\$$$$LRELEASE|updateqm.commands = $($(package)_extract_dir)/qttools/bin/lrelease|" qttranslations/translations/translations.pro && \
   sed -i.old "/updateqm.depends =/d" qttranslations/translations/translations.pro && \
   patch -p1 -i $($(package)_patch_dir)/dont_hardcode_pwd.patch &&\

depends/patches/qt/freetype_back_compat.patch

@@ -0,0 +1,28 @@
+commit 14bc77db61bf9d56f9b6c8b84aa02573605c19c6
+Author: fanquake <fanquake@gmail.com>
+Date:   Tue Aug 18 15:15:08 2020 +0800
+
+    Fix backwards compatibility with older Freetype versions at runtime
+
+    A few years ago, libfreetype introduced FT_Get_Font_Format() as an alias
+    for FT_Get_X11_Font_Format(), but FT_Get_X11_Font_Format() was kept for abi
+    backwards-compatibility.
+
+    Qt 5.9 introduced a call to FT_Get_Font_Format(). Replace it with FT_Get_X11_Font_Format()
+    in order to remain compatibile with older freetype, which is still used by e.g. Ubuntu Trusty.
+
+    See #14348.
+
+diff --git a/qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp b/qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
+index 3f543755..8ecc1c8c 100644
+--- a/qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
++++ b/qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
+@@ -898,7 +898,7 @@ bool QFontEngineFT::init(FaceId faceId, bool antialias, GlyphFormat format,
+         }
+     }
+ #if defined(FT_FONT_FORMATS_H)
+-    const char *fmt = FT_Get_Font_Format(face);
++    const char *fmt = FT_Get_X11_Font_Format(face);
+     if (fmt && qstrncmp(fmt, "CFF", 4) == 0) {
+         FT_Bool no_stem_darkening = true;
+         FT_Error err = FT_Property_Get(qt_getFreetype(), "cff", "no-stem-darkening", &no_stem_darkening);