Try to address:

 warning: 'JSC::ARM64Assembler::LinkRecord::<anonymous union>::RealTypes::m_compareRegister'
          is too small to hold all values of
          'JSC::ARM64Assembler::RegisterID {aka enum JSC::ARM64Registers::RegisterID}'

warnings.  Suggestion from <jakllsch>.


Index: distinfo
===================================================================
RCS file: /cvsroot/pkgsrc/www/webkit-gtk/distinfo,v
retrieving revision 1.112
diff -u -p -r1.112 distinfo
--- distinfo	13 Dec 2018 22:50:27 -0000	1.112
+++ distinfo	23 Dec 2018 11:48:27 -0000
@@ -5,7 +5,7 @@ RMD160 (webkitgtk-2.22.5.tar.xz) = 6f251
 SHA512 (webkitgtk-2.22.5.tar.xz) = fcea9fab3d71869cc10e322b1b63864a9594624f6aa3e29efd8b47e5ca639145f8c2cdb299ecb51eadf3ac1238dac06b4b7ebe94969b2f61a21cea8b609007bc
 Size (webkitgtk-2.22.5.tar.xz) = 16774560 bytes
 SHA1 (patch-CMakeLists.txt) = 2f05f3682bda601c99544dafd8e79bd622dfc5a5
-SHA1 (patch-Source_JavaScriptCore_assembler_ARM64Assembler.h) = 7479e5933df6f8d1670e362ae68c253362eda9e9
+SHA1 (patch-Source_JavaScriptCore_assembler_ARM64Assembler.h) = ea420de629f9c7655f11e0ff1c1c6cba92071a61
 SHA1 (patch-Source_JavaScriptCore_assembler_ARMAssembler.h) = bae08310572c2e23c69cbf6aa9760a67345dcfe3
 SHA1 (patch-Source_JavaScriptCore_assembler_MacroAssemblerARM.cpp) = ab75ef8714e5071fcd094735717a2f5d0321c747
 SHA1 (patch-Source_JavaScriptCore_heap_MarkedSpace.cpp) = e6a23d5ef22bddd0a9606fb0e472960e4cf5673e
Index: patches/patch-Source_JavaScriptCore_assembler_ARM64Assembler.h
===================================================================
RCS file: /cvsroot/pkgsrc/www/webkit-gtk/patches/patch-Source_JavaScriptCore_assembler_ARM64Assembler.h,v
retrieving revision 1.1
diff -u -p -r1.1 patch-Source_JavaScriptCore_assembler_ARM64Assembler.h
--- patches/patch-Source_JavaScriptCore_assembler_ARM64Assembler.h	13 Nov 2018 20:11:38 -0000	1.1
+++ patches/patch-Source_JavaScriptCore_assembler_ARM64Assembler.h	23 Dec 2018 11:48:27 -0000
@@ -1,12 +1,21 @@
 $NetBSD: patch-Source_JavaScriptCore_assembler_ARM64Assembler.h,v 1.1 2018/11/13 20:11:38 leot Exp $
 
-Add support for FreeBSD and NetBSD.
+- Bump m_compareRegister to hold values of JSC::ARM64Assembler::RegisterID
+- Add support for FreeBSD and NetBSD.
+  Based on patch from FreeBSD ports but using __builtin___clear_cache()
+  instead of __clear_cache() (the former is also available in gcc).
 
-Based on patch from FreeBSD ports but using __builtin___clear_cache()
-instead of __clear_cache() (the former is also available in gcc).
-
---- Source/JavaScriptCore/assembler/ARM64Assembler.h.orig	2018-10-27 21:20:55.000000000 +0000
+--- Source/JavaScriptCore/assembler/ARM64Assembler.h.orig	2018-12-13 01:57:37.000000000 +0000
 +++ Source/JavaScriptCore/assembler/ARM64Assembler.h
+@@ -456,7 +456,7 @@ public:
+                 JumpLinkType m_linkType : 8;
+                 Condition m_condition : 4;
+                 unsigned m_bitNumber : 6;
+-                RegisterID m_compareRegister : 6;
++                RegisterID m_compareRegister : 7;
+                 bool m_is64Bit : 1;
+             } realTypes;
+             struct CopyTypes {
 @@ -2863,6 +2863,8 @@ public:
      {
  #if OS(IOS)