Get arm64-windows builds working

Update various checks to include "ARM64" and "_M_ARM64".

Remove a /BASE flag which fixes an "ARM64 image cannot have base
address below 4GB" error and which arguably shouldn't be used in
modern times since it prevents using dynamic base addresses.

ticket: 9094 (new)

src/config/win-post.in

@@ -63,7 +63,7 @@ check-windows: check-recurse
 !endif # WINSUBDIRS
 
 # Use 64-bit LIBNAME and OBJFILE on 64-bit platforms, if defined.
-!if ("$(CPU)" == "IA64") || ("$(CPU)" == "AMD64") || ("$(CPU)" == "ALPHA64")
+!if ("$(CPU)" == "IA64") || ("$(CPU)" == "AMD64") || ("$(CPU)" == "ALPHA64") || ("$(CPU)" == "ARM64")
 !if defined(WIN64LIBNAME)
 LIBNAME=$(WIN64LIBNAME)
 !endif

src/config/win-pre.in

@@ -31,11 +31,11 @@ CPU=i386
 CPU=i386
 !endif # CPU == X86
 
-!if ( "$(CPU)" != "i386" ) && ( "$(CPU)" != "ALPHA" ) && ( "$(CPU)" != "ALPHA64" ) && ( "$(CPU)" != "IA64" ) && ( "$(CPU)" != "AMD64" )
+!if ( "$(CPU)" != "i386" ) && ( "$(CPU)" != "ALPHA" ) && ( "$(CPU)" != "ALPHA64" ) && ( "$(CPU)" != "IA64" ) && ( "$(CPU)" != "AMD64" ) && ( "$(CPU)" != "ARM64" )
 !error Must specify CPU environment variable ( CPU=i386, CPU=ALPHA, CPU=ALPHA64,CPU=IA64, CPU=AMD64)
 !endif
 
-!if  ("$(CPU)" == "IA64" ) || ("$(CPU)" == "AMD64" ) || ("$(CPU)" == "ALPHA64" )
+!if  ("$(CPU)" == "IA64" ) || ("$(CPU)" == "AMD64" ) || ("$(CPU)" == "ALPHA64" ) || ("$(CPU)" == "ARM64" )
 BITS=64
 !else
 BITS=32

src/lib/Makefile.in

@@ -59,7 +59,7 @@ clean-windows::
 ##WIN32##WINLIBS = kernel32.lib ws2_32.lib user32.lib shell32.lib oldnames.lib \
 ##WIN32##	version.lib secur32.lib advapi32.lib gdi32.lib delayimp.lib \
 ##WIN32##	$(WINCRTEXTRA)
-##WIN32##WINDLLFLAGS = $(DLL_LINKOPTS) -base:0x1c000000 /DELAYLOAD:secur32.dll \
+##WIN32##WINDLLFLAGS = $(DLL_LINKOPTS) /DELAYLOAD:secur32.dll \
 ##WIN32##	/DELAYLOAD:advapi32.dll /DELAY:UNLOAD /DELAY:NOBIND
 
 ##WIN32##S_GLUE=$(OUTPRE)support_glue.obj

src/lib/crypto/builtin/aes/brg_endian.h

@@ -119,7 +119,7 @@ Issue Date: 10/09/2018
       defined( __i386__ )  || defined( _M_I86 )  || defined( _M_IX86 )    || \
       defined( __OS2__ )   || defined( sun386 )  || defined( __TURBOC__ ) || \
       defined( vax )       || defined( vms )     || defined( VMS )        || \
-      defined( __VMS )     || defined( _M_X64 )
+      defined( __VMS )     || defined( _M_X64 )  || defined( _M_ARM64 )
 #  define PLATFORM_BYTE_ORDER IS_LITTLE_ENDIAN
 
 #elif defined( AMIGA )   || defined( applec )    || defined( __AS400__ )  || \