diff --git a/icu4c/source/aclocal.m4 b/icu4c/source/aclocal.m4
index 1ef107ca330..3c9a0f3f313 100644
--- a/icu4c/source/aclocal.m4
+++ b/icu4c/source/aclocal.m4
@@ -218,6 +218,8 @@ AC_DEFUN(AC_CHECK_64BIT_LIBS,
                 if test "$ENABLE_64BIT_LIBS" = no; then
                     CPPFLAGS="${OLD_CPPFLAGS}"
                     LDFLAGS="${OLD_LDFLAGS}"
+                else
+                    ARFLAGS="${ARFLAGS} /MACHINE:AMD64"
                 fi
             fi
             ;;
diff --git a/icu4c/source/common/Makefile.in b/icu4c/source/common/Makefile.in
index f9e46e12db2..b5da7fe74e4 100644
--- a/icu4c/source/common/Makefile.in
+++ b/icu4c/source/common/Makefile.in
@@ -1,6 +1,6 @@
 #******************************************************************************
 #
-#   Copyright (C) 1999-2006, International Business Machines
+#   Copyright (C) 1999-2007, International Business Machines
 #   Corporation and others.  All Rights Reserved.
 #
 #******************************************************************************
@@ -178,7 +178,8 @@ unicode/platform.h: $(srcdir)/unicode/platform.h.in $(top_builddir)/config.statu
 	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
 
 ifneq ($(ENABLE_STATIC),)
-$(TARGET): $(TARGET)($(STATIC_OBJECTS))
+$(TARGET): $(STATIC_OBJECTS)
+	$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $^
 	$(RANLIB) $@
 endif
 
diff --git a/icu4c/source/config/mh-aix-gcc b/icu4c/source/config/mh-aix-gcc
index 79e68072a05..bee39676b5d 100644
--- a/icu4c/source/config/mh-aix-gcc
+++ b/icu4c/source/config/mh-aix-gcc
@@ -1,5 +1,5 @@
 ## -*-makefile-*-
-## Copyright (c) 2003-2006 IBM, Ken Foskey, and others. All rights reserved.
+## Copyright (c) 2003-2007 IBM, Ken Foskey, and others. All rights reserved.
 ##
 ## Aix-specific setup (for gcc)
 ##
@@ -19,8 +19,6 @@ LINK.cc=	$(AIX_PREDELETE) $(CXX) $(CXXFLAGS) $(LDFLAGS)
 ## Commands to make a shared library
 SHLIB.c=    $(AIX_PREDELETE) $(CC) $(CFLAGS) $(LDFLAGS) -shared -Wl,-bexpall
 SHLIB.cc=   $(AIX_PREDELETE) $(CXX) $(CXXFLAGS) $(LDFLAGS) -shared -Wl,-bexpall
-#SHLIB.c=	$(AIX_PREDELETE) $(AIX_SHLIB) -p 5000 $(LDFLAGS) -bexpall 
-#SHLIB.cc=	$(AIX_PREDELETE) $(AIX_SHLIB) -p 5000 $(LDFLAGS) -bexpall 
 
 ## Compiler switch to embed a runtime search path
 LD_RPATH=	-I
diff --git a/icu4c/source/config/mh-cygwin-msvc b/icu4c/source/config/mh-cygwin-msvc
index 2ebdb3b2a17..c006ad499bc 100644
--- a/icu4c/source/config/mh-cygwin-msvc
+++ b/icu4c/source/config/mh-cygwin-msvc
@@ -75,6 +75,12 @@ OUTOPT = /out:
 LIBSICU = $(STATIC_PREFIX)$(ICUPREFIX)
 A = lib
 
+# Cygwin's ar can't handle Win64 right now. So we use Microsoft's tool instead.
+AR = LIB.EXE
+ARFLAGS := /nologo $(ARFLAGS:r=)
+RANLIB = ls -s
+AR_OUTOPT = /OUT:
+
 ## An import library is needed for z/OS and MSVC
 IMPORT_LIB_EXT = .lib
 
@@ -88,7 +94,11 @@ I18N_STUBNAME = in
 LIBICU = $(STATIC_PREFIX_WHEN_USED)$(ICUPREFIX)
 
 ## Link commands to link to ICU libs
+ifeq ($(wildcard $(LIBDIR)/$(LIBICU)$(DATA_STUBNAME)$(ICULIBSUFFIX).lib),)
 LIBICUDT=	$(top_builddir)/stubdata/$(LIBICU)$(DATA_STUBNAME)$(ICULIBSUFFIX).lib
+else
+LIBICUDT=	$(LIBDIR)/$(LIBICU)$(DATA_STUBNAME)$(ICULIBSUFFIX).lib
+endif
 LIBICUUC=	$(LIBDIR)/$(LIBICU)$(COMMON_STUBNAME)$(ICULIBSUFFIX).lib $(LIBICUDT)
 LIBICUI18N=	$(LIBDIR)/$(LIBICU)$(I18N_STUBNAME)$(ICULIBSUFFIX).lib
 LIBICULE=	$(LIBDIR)/$(LIBICU)$(LAYOUT_STUBNAME)$(ICULIBSUFFIX).lib
diff --git a/icu4c/source/configure b/icu4c/source/configure
index 06a700cdd64..6e0837e779f 100755
--- a/icu4c/source/configure
+++ b/icu4c/source/configure
@@ -3121,6 +3121,8 @@ fi
                 if test "$ENABLE_64BIT_LIBS" = no; then
                     CPPFLAGS="${OLD_CPPFLAGS}"
                     LDFLAGS="${OLD_LDFLAGS}"
+                else
+                    ARFLAGS="${ARFLAGS} /MACHINE:AMD64"
                 fi
             fi
             ;;
diff --git a/icu4c/source/i18n/Makefile.in b/icu4c/source/i18n/Makefile.in
index 87f791c672d..5fe039ce3cc 100644
--- a/icu4c/source/i18n/Makefile.in
+++ b/icu4c/source/i18n/Makefile.in
@@ -1,6 +1,6 @@
 #******************************************************************************
 #
-#   Copyright (C) 1998-2006, International Business Machines
+#   Copyright (C) 1998-2007, International Business Machines
 #   Corporation and others.  All Rights Reserved.
 #
 #******************************************************************************
@@ -156,7 +156,8 @@ Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
 
 ifneq ($(ENABLE_STATIC),)
-$(TARGET): $(TARGET)($(STATIC_OBJECTS))
+$(TARGET): $(STATIC_OBJECTS)
+	$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $^
 	$(RANLIB) $@
 endif
 
diff --git a/icu4c/source/icudefs.mk.in b/icu4c/source/icudefs.mk.in
index edf8a8f37de..8b263a3a217 100644
--- a/icu4c/source/icudefs.mk.in
+++ b/icu4c/source/icudefs.mk.in
@@ -1,9 +1,8 @@
-
 # Make definitions that are shared by the different subprojects of ICU.
 #
 # Yves Arrouye.
 #
-# Copyright (C) 2000-2006, International Business Machines Corporation and others.
+# Copyright (C) 2000-2007, International Business Machines Corporation and others.
 # All Rights Reserved.
 
 #
@@ -99,9 +98,8 @@ ENABLE_RELEASE = @ENABLE_RELEASE@
 EXEEXT = @EXEEXT@
 CC = @CC@
 CXX = @CXX@
-AIX_SHLIB = @AIX_SHLIB@
 AR = @AR@
-ARFLAGS := @ARFLAGS@ $(ARFLAGS)
+ARFLAGS = @ARFLAGS@ r
 RANLIB = @RANLIB@
 COMPILE_LINK_ENVVAR = @COMPILE_LINK_ENVVAR@
 
@@ -129,6 +127,8 @@ LIB_M = @LIB_M@
 LIB_THREAD = @LIB_THREAD@
 # OUTOPT is for creating a specific output name
 OUTOPT = -o # The extra space after the argument is needed.
+# AR_OUTOPT is for creating a specific output name for static libraries.
+AR_OUTOPT =
 
 ENABLE_RPATH = @ENABLE_RPATH@
 ifeq ($(ENABLE_RPATH),YES)
diff --git a/icu4c/source/io/Makefile.in b/icu4c/source/io/Makefile.in
index 0d596b01074..dc1af8dca2d 100644
--- a/icu4c/source/io/Makefile.in
+++ b/icu4c/source/io/Makefile.in
@@ -1,6 +1,6 @@
 #******************************************************************************
 #
-#   Copyright (C) 1999-2006, International Business Machines
+#   Copyright (C) 1999-2007, International Business Machines
 #   Corporation and others.  All Rights Reserved.
 #
 #******************************************************************************
@@ -141,7 +141,8 @@ Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
 
 ifneq ($(ENABLE_STATIC),)
-$(TARGET): $(TARGET)($(STATIC_OBJECTS))
+$(TARGET): $(STATIC_OBJECTS)
+	$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $^
 	$(RANLIB) $@
 endif
 
diff --git a/icu4c/source/layout/Makefile.in b/icu4c/source/layout/Makefile.in
index d77746aaf96..493e573ddf4 100644
--- a/icu4c/source/layout/Makefile.in
+++ b/icu4c/source/layout/Makefile.in
@@ -211,7 +211,8 @@ Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
 
 ifneq ($(ENABLE_STATIC),)
-$(TARGET): $(TARGET)($(STATIC_OBJECTS))
+$(TARGET): $(STATIC_OBJECTS)
+	$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $^
 	$(RANLIB) $@
 endif
 
diff --git a/icu4c/source/layoutex/Makefile.in b/icu4c/source/layoutex/Makefile.in
index 7eb4e949c16..d25d27d8d25 100644
--- a/icu4c/source/layoutex/Makefile.in
+++ b/icu4c/source/layoutex/Makefile.in
@@ -142,7 +142,8 @@ Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
 
 ifneq ($(ENABLE_STATIC),)
-$(TARGET): $(TARGET)($(STATIC_OBJECTS))
+$(TARGET): $(STATIC_OBJECTS)
+	$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $^
 	$(RANLIB) $@
 endif
 
diff --git a/icu4c/source/stubdata/Makefile.in b/icu4c/source/stubdata/Makefile.in
index 22b3dd4ab17..d54ce265636 100644
--- a/icu4c/source/stubdata/Makefile.in
+++ b/icu4c/source/stubdata/Makefile.in
@@ -1,6 +1,6 @@
 #******************************************************************************
 #
-#   Copyright (C) 1999-2005, International Business Machines
+#   Copyright (C) 1999-2007, International Business Machines
 #   Corporation and others.  All Rights Reserved.
 #
 #******************************************************************************
@@ -124,7 +124,8 @@ Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 	 && CONFIG_FILES=common/unicode/platform.h CONFIG_HEADERS= $(SHELL) ./config.status
 
 ifneq ($(ENABLE_STATIC),)
-$(TARGET): $(TARGET)($(STATIC_OBJECTS))
+$(TARGET): $(STATIC_OBJECTS)
+	$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $^
 	$(RANLIB) $@
 endif
 
diff --git a/icu4c/source/tools/ctestfw/Makefile.in b/icu4c/source/tools/ctestfw/Makefile.in
index 7ffe1c62139..4651a2fbd65 100644
--- a/icu4c/source/tools/ctestfw/Makefile.in
+++ b/icu4c/source/tools/ctestfw/Makefile.in
@@ -1,6 +1,6 @@
 #******************************************************************************
 #
-#   Copyright (C) 1999-2006, International Business Machines
+#   Copyright (C) 1999-2007, International Business Machines
 #   Corporation and others.  All Rights Reserved.
 #
 #******************************************************************************
@@ -96,7 +96,8 @@ Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
 
 ifneq ($(ENABLE_STATIC),)
-$(TARGET): $(TARGET)($(STATIC_OBJECTS))
+$(TARGET): $(STATIC_OBJECTS)
+	$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $^
 	$(RANLIB) $@
 endif
 
diff --git a/icu4c/source/tools/pkgdata/pkgtypes.h b/icu4c/source/tools/pkgdata/pkgtypes.h
index 8826cda543c..7c8d4349950 100644
--- a/icu4c/source/tools/pkgdata/pkgtypes.h
+++ b/icu4c/source/tools/pkgdata/pkgtypes.h
@@ -1,6 +1,6 @@
 /**************************************************************************
 *
-*   Copyright (C) 2000-2006, International Business Machines
+*   Copyright (C) 2000-2007, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ***************************************************************************
@@ -141,12 +141,12 @@ char * convertToNativePathSeparators(char *path);
 
 #ifdef U_WINDOWS
 # ifndef UDATA_SO_SUFFIX
-#  define UDATA_SO_SUFFIX ".DLL"
+#  define UDATA_SO_SUFFIX ".dll"
 # endif
 # define LIB_PREFIX ""
 # define LIB_STATIC_PREFIX ""
 # define OBJ_SUFFIX ".obj"
-# define UDATA_LIB_SUFFIX ".LIB"
+# define UDATA_LIB_SUFFIX ".lib"
 
 #elif defined(U_CYGWIN)
 # define LIB_PREFIX "cyg"
diff --git a/icu4c/source/tools/pkgdata/sttcmode.c b/icu4c/source/tools/pkgdata/sttcmode.c
index 568dec7b618..ba44541291f 100644
--- a/icu4c/source/tools/pkgdata/sttcmode.c
+++ b/icu4c/source/tools/pkgdata/sttcmode.c
@@ -1,6 +1,6 @@
 /******************************************************************************
 *
-*   Copyright (C) 2002-2006, International Business Machines
+*   Copyright (C) 2002-2007, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 *******************************************************************************
@@ -32,17 +32,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-/** set if AR is NOT to be called implicitly by gnumake 
- ** (i.e. if  the form   libblah.a($(OBJECTS) doesnt work) 
- **/
-#if !defined(NO_IMPLICIT_AR)
-#if defined(OS400) || defined(OS390)
-#    define NO_IMPLICIT_AR  1
-#else
-#    define NO_IMPLICIT_AR  0
-#endif
-#endif
-
 void pkg_sttc_writeReadme(struct UPKGOptions_ *o, const char *libName, UErrorCode *status)
 {
   char tmp[1024];
@@ -242,14 +231,9 @@ void pkg_mode_static(UPKGOptions *o, FileStream *makefile, UErrorCode *status)
 
     T_FileStream_writeLine(makefile,"$(TEMP_PATH)%.$(STATIC_O): $(TEMP_PATH)%.c\n\t  $(COMPILE.c) -o $@ $<\n\n");
 
-#if NO_IMPLICIT_AR
-    T_FileStream_writeLine(makefile, "$(TARG_PATH)$(LIB_TARGET):$(TARG_PATH)$(LIB_TARGET) $(OBJECTS) $(LISTFILES)\n"
-                           "\t$(AR) $(ARFLAGS) $(TARG_PATH)$(LIB_TARGET) $(OBJECTS)\n"
+    T_FileStream_writeLine(makefile, "$(TARG_PATH)$(LIB_TARGET): $(OBJECTS) $(LISTFILES)\n"
+                            "\t$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $(OBJECTS)\n"
                             "\t$(RANLIB) $@\n\n");
-#else
-    T_FileStream_writeLine(makefile, "$(TARG_PATH)$(LIB_TARGET):$(TARG_PATH)$(LIB_TARGET)($(OBJECTS)) $(LISTFILES)\n"
-                            "\t$(RANLIB) $@\n\n");
-#endif
 
 
     T_FileStream_writeLine(makefile, "CLEANFILES= $(CMNLIST) $(OBJECTS) $(TARG_PATH)$(LIB_TARGET) $(TARG_PATH)$(MIDDLE_STATIC_LIB_TARGET) $(TARG_PATH)$(TARGET)\n\nclean:\n\t-$(RMV) $(CLEANFILES) $(MAKEFILE)");
diff --git a/icu4c/source/tools/pkgdata/winmode.c b/icu4c/source/tools/pkgdata/winmode.c
index 5afc3a6c431..460ae12ca7b 100644
--- a/icu4c/source/tools/pkgdata/winmode.c
+++ b/icu4c/source/tools/pkgdata/winmode.c
@@ -1,6 +1,6 @@
 /******************************************************************************
 *
-*   Copyright (C) 2000-2006, International Business Machines
+*   Copyright (C) 2000-2007, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 *******************************************************************************
@@ -167,8 +167,7 @@ void pkg_mode_windows(UPKGOptions *o, FileStream *makefile, UErrorCode *status)
 
         sprintf(tmp2,
             "LINK32 = LIB.exe\n"
-            "LINK32_FLAGS = /nologo /out:\"$(TARGETDIR)\\$(DLLTARGET)\" /EXPORT:\"%s\"\n",
-            o->libName
+            "LINK32_FLAGS = /nologo /out:\"$(TARGETDIR)\\$(DLLTARGET)\"\n"
             );
         T_FileStream_writeLine(makefile, tmp2);
 
diff --git a/icu4c/source/tools/toolutil/Makefile.in b/icu4c/source/tools/toolutil/Makefile.in
index c9e202841f1..bb42469e7c2 100644
--- a/icu4c/source/tools/toolutil/Makefile.in
+++ b/icu4c/source/tools/toolutil/Makefile.in
@@ -1,6 +1,6 @@
 #******************************************************************************
 #
-#   Copyright (C) 1999-2005, International Business Machines
+#   Copyright (C) 1999-2007, International Business Machines
 #   Corporation and others.  All Rights Reserved.
 #
 #******************************************************************************
@@ -112,7 +112,8 @@ Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
 
 ifneq ($(ENABLE_STATIC),)
-$(TARGET): $(TARGET)($(STATIC_OBJECTS))
+$(TARGET): $(STATIC_OBJECTS)
+	$(AR) $(ARFLAGS) $(AR_OUTOPT)$@ $^
 	$(RANLIB) $@
 endif