msvc: use :X86-64 feature keyword when make a 64bit build

msvc/Makefile

@@ -101,7 +101,7 @@ MKNSI   = makensis.exe
 !if "$(ECL_WIN64)" != ""
 GMP_BITS=64
 GC_CPU=AMD64
-ARCHITECTURE=AMD64
+ARCHITECTURE=X86-64
 VCREDIST=vcredist_x64.exe
 !else
 GMP_BITS=32
@@ -134,7 +134,7 @@ GCFLAGS = nodebug=1
 CLIBS = $(CLIBS) DbgHelp.lib
 !endif
 
-CFLAGS  = /EHsc /DGC_DLL /DGC_BUILD /nologo /D_CRT_SECURE_NO_DEPRECATE $(CFLAGS_CONFIG)
+CFLAGS  = /EHsc /DGC_DLL /DGC_BUILD /nologo /wd4068 /wd4715 /wd4716 /D_CRT_SECURE_NO_DEPRECATE $(CFLAGS_CONFIG)
 LDFLAGS	= /link /incremental:no /nologo $(LDFLAGS_CONFIG) /STACK:$(ECL_DEFAULT_C_STACK_SIZE)
 
 
@@ -353,6 +353,7 @@ eclmin.lib: eclgmp.lib eclgc.lib lsp/config.lsp
 	        ECL_THREADS=$(ECL_THREADS) ECL_UNICODE=$(ECL_UNICODE) \
 		ECL_SSE=$(ECL_SSE) ECL_WIN64=$(ECL_WIN64) \
 		ECL_USE_DBGHELP=$(ECL_USE_DBGHELP) \
+		ECL_ARCHITECTURE=$(ARCHITECTURE) \
 		"ECL_CFLAGS=$(CFLAGS) -DGC_BUILD"
 	cd ..
 eclgc.lib:

msvc/c/Makefile

@@ -183,6 +183,7 @@ $(HFILES): ../ecl/config.h.msvc6 ../ecl/config-internal.h.msvc6 Makefile
 		"@ECL_UNICODE@" "$(ECL_UNICODE_FLAG)" \
 		"@ECL_SSE2@" "$(ECL_SSE_FLAG)" \
 		"@ECL_USE_DBGHELP@" "$(ECL_USE_DBGHELP_FLAG)" \
+		"@ARCHITECTURE@" "$(ECL_ARCHITECTURE)" \
 	        < ..\ecl\config-internal.h.msvc6 > ..\ecl\config-internal.h
 	xcopy /SYI $(top_srcdir)\h\*.h ..\ecl
 	-mkdir ..\ecl\atomic_ops

msvc/ecl/config-internal.h.msvc6

@@ -163,7 +163,7 @@
 #  define PATH_SEPARATOR	':'
 #endif
 
-#define ECL_ARCHITECTURE "PENTIUM4"
+#define ECL_ARCHITECTURE "@ARCHITECTURE@"
 
 #ifdef ECL_AVOID_FPE_H
 # define ecl_detect_fpe()