[harfbuzz] Use vcpkg Features for UCDN & Glib (#3560)

* [harfbuzz] Use Features for UCDN & Glib

Permit configuration of UCDN and Glib Unicode callback support via features.

* [harfbuzz][pango] Merge conflicts. Pango depends on harfbuzz[glib]

ports/harfbuzz/CONTROL

@@ -1,8 +1,16 @@
 Source: harfbuzz
-Version: 1.8.2
+Version: 1.8.2-2
 Description: HarfBuzz OpenType text shaping engine
-Build-Depends: freetype, ragel, glib (windows)
+Build-Depends: freetype, ragel
+Default-Features: ucdn
 
 Feature: icu
 Build-Depends: icu
 Description: icu support for harfbuzz
+
+Feature: ucdn
+Description: Builtin (UCDN) Unicode callbacks support
+
+Feature: glib
+Build-Depends: glib
+Description: Glib Unicode callbacks support

ports/harfbuzz/portfile.cmake

@@ -20,12 +20,23 @@ if("icu" IN_LIST FEATURES)
     SET(HB_HAVE_ICU "ON")
 endif()
 
-if(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm" OR VCPKG_CMAKE_SYSTEM_NAME)
-    SET(HAVE_GLIB "OFF")
-    SET(BUILTIN_UCDN "ON")
-else()
-    SET(HAVE_GLIB "ON")
-    SET(BUILTIN_UCDN "OFF")
+## Unicode callbacks
+
+# Builtin (UCDN)
+set(BUILTIN_UCDN OFF)
+if("ucdn" IN_LIST FEATURES)
+    set(BUILTIN_UCDN ON)
+endif()
+
+# Glib
+set(HAVE_GLIB OFF)
+if("glib" IN_LIST FEATURES)
+    set(HAVE_GLIB ON)
+endif()
+
+# At least one Unicode callback must be specified, or harfbuzz compilation fails
+if(NOT (BUILTIN_UCDN OR HAVE_GLIB))
+    message(FATAL_ERROR "Error: At least one Unicode callback must be specified (ucdn, glib).")
 endif()
 
 vcpkg_configure_cmake(
@@ -33,9 +44,9 @@ vcpkg_configure_cmake(
     PREFER_NINJA
     OPTIONS
         -DHB_HAVE_FREETYPE=ON
-        -DHB_HAVE_GLIB=${HAVE_GLIB}
         -DHB_BUILTIN_UCDN=${BUILTIN_UCDN}
         -DHB_HAVE_ICU=${HB_HAVE_ICU}
+        -DHB_HAVE_GLIB=${HAVE_GLIB}
     OPTIONS_DEBUG
         -DSKIP_INSTALL_HEADERS=ON
 )

ports/pango/CONTROL

@@ -1,4 +1,4 @@
 Source: pango
 Version: 1.40.11-1
 Description: Text and font handling library.
-Build-Depends: glib, gettext, cairo, fontconfig, freetype, harfbuzz
+Build-Depends: glib, gettext, cairo, fontconfig, freetype, harfbuzz[glib] (!windows-static)