Here are the patches against the current source tree. I have run the

regression test on a FreeBSD box with both non-MULTIBYTE and
MULTIBYTE-enabled, and confirmed that the results are same.

However I do not tested on PCs(I don't have access to win). Please let
me know if the patches break anything on PCs.

Also please note that the patch for varchar.c is a fix for a nasty bug
of char(n) types that I introduced and I believe at least this should
be applied.

Tatsuo Ishii

src/interfaces/libpq/win32.mak

@@ -33,7 +33,7 @@ CLEAN :
 	-@erase "$(OUTDIR)\libpq.lib"
 	-@erase "$(OUTDIR)\libpq.dll"
 	-@erase "$(OUTDIR)\libpq.res"
-	-@erase "$(OUTDIR)\vc*.*"
+	-@erase "vc50.pch"
 	-@erase "$(OUTDIR)\libpq.pch"
 	-@erase "$(OUTDIR)\libpqdll.exp"
 	-@erase "$(OUTDIR)\libpqdll.lib"
@@ -44,6 +44,14 @@ CLEAN :
 CPP_PROJ=/nologo /ML /W3 /GX /O2 /I "..\..\include" /D "NDEBUG" /D\
  "WIN32" /D "_WINDOWS" /Fp"$(INTDIR)\libpq.pch" /YX\
  /Fo"$(INTDIR)\\" /Fd"$(INTDIR)\\" /FD /c 
+
+!IFDEF MULTIBYTE
+!IFNDEF	MBFLAGS
+MBFLAGS="-DMULTIBYTE=$(MULTIBYTE)"
+!ENDIF
+CPP_PROJ = $(CPP_PROJ) $(MBFLAGS)
+!ENDIF
+
 CPP_OBJS=.\Release/
 CPP_SBRS=.
 	
@@ -58,6 +66,10 @@ LIB32_OBJS= \
 	"$(INTDIR)\fe-misc.obj" \
 	"$(INTDIR)\fe-print.obj"
 
+!IFDEF MULTIBYTE
+LIB32_OBJS = $(LIB32_OBJS) $(INTDIR)\common.obj $(INTDIR)\wchar.obj $(INTDIR)\conv.obj
+!ENDIF
+
 RSC_PROJ=/l 0x409 /fo"$(INTDIR)\libpq.res"
 
 LINK32=link.exe