diff '--color=auto' -ur icu4c-71.1/source/config/mh-unknown icu4c-71.1.wasm/source/config/mh-unknown
--- icu4c-71.1/source/config/mh-unknown	2022-04-08 00:41:55.000000000 +0200
+++ icu4c-71.1.wasm/source/config/mh-unknown	2023-10-25 14:00:18.035718690 +0200
@@ -1,29 +1,87 @@
 ## -*-makefile-*-
 ## Copyright (C) 2016 and later: Unicode, Inc. and others.
 ## License & terms of use: http://www.unicode.org/copyright.html
-## Copyright (c) 2003, International Business Machines Corporation and
+## Linux-specific setup
+## Copyright (c) 1999-2013, International Business Machines Corporation and
 ## others. All Rights Reserved.
-##
 
-# Note, this is not a real mh- file. You got here because configure
-# (specifically, aclocal.m4) could not determine a suitable mh- file.
-#
-# Perhaps your platform wasn't detected- try changing aclocal.m4 and
-# re-running autoconf. 
-#
-# If your platform is truly new/different:
-# As a start, try copying mh-linux (which is fairly generic) over this
-# file, and re-run config.status.
-
-%.$(STATIC_O) %.o %.$(STATIC_O) %.o ../data/%.o %.d %.d %.$(SO).$(SO_TARGET_VERSION_MAJOR) %.$(SO):
-	@echo 
-	@echo 
-	@echo "*** ERROR - configure could not detect your platform"
-	@echo "*** see the readme.html"
-	@echo "*** or, try copying icu/source/config/mh-linux to mh-unknown"
-	@echo "***   and editing it."
-	@echo 
-	@echo 
-	exit 1
+## Commands to generate dependency files
+GEN_DEPS.c=  $(CC) -E -MM $(DEFS) $(CPPFLAGS)
+GEN_DEPS.cc= $(CXX) -E -MM $(DEFS) $(CPPFLAGS) $(CXXFLAGS)
 
+## Flags for position independent code
+SHAREDLIBCFLAGS = -fPIC
+SHAREDLIBCXXFLAGS = -fPIC
+SHAREDLIBCPPFLAGS = -DPIC
+
+## Additional flags when building libraries and with threads
+THREADSCPPFLAGS = -D_REENTRANT
+LIBCPPFLAGS =
+
+## Compiler switch to embed a runtime search path
+LD_RPATH= -Wl,-zorigin,-rpath,'$$'ORIGIN 
+LD_RPATH_PRE = -Wl,-rpath,
+
+## These are the library specific LDFLAGS
+LDFLAGSICUDT=-nodefaultlibs -nostdlib
+
+## Compiler switch to embed a library name
+# The initial tab in the next line is to prevent icu-config from reading it.
+	LD_SONAME = -Wl,-soname -Wl,$(notdir $(MIDDLE_SO_TARGET))
+#SH# # We can't depend on MIDDLE_SO_TARGET being set.
+#SH# LD_SONAME=
+
+## Shared library options
+LD_SOOPTIONS= -Wl,-Bsymbolic
+
+## Shared object suffix
+SO = so
+## Non-shared intermediate object suffix
+STATIC_O = ao
+
+## Compilation rules
+%.$(STATIC_O): $(srcdir)/%.c
+	$(call SILENT_COMPILE,$(strip $(COMPILE.c) $(STATICCPPFLAGS) $(STATICCFLAGS)) -o $@ $<)
+%.o: $(srcdir)/%.c
+	$(call SILENT_COMPILE,$(strip $(COMPILE.c) $(DYNAMICCPPFLAGS) $(DYNAMICCFLAGS)) -o $@ $<)
+
+%.$(STATIC_O): $(srcdir)/%.cpp
+	$(call SILENT_COMPILE,$(strip $(COMPILE.cc) $(STATICCPPFLAGS) $(STATICCXXFLAGS)) -o $@ $<)
+%.o: $(srcdir)/%.cpp
+	$(call SILENT_COMPILE,$(strip $(COMPILE.cc) $(DYNAMICCPPFLAGS) $(DYNAMICCXXFLAGS)) -o $@ $<)
+
+
+## Dependency rules
+%.d: $(srcdir)/%.c
+	$(call ICU_MSG,(deps)) $<
+	@$(SHELL) -ec '$(GEN_DEPS.c) $< \
+		| sed '\''s%\($*\)\.o[ :]*%\1.o $@ : %g'\'' > $@; \
+		[ -s $@ ] || rm -f $@'
+
+%.d: $(srcdir)/%.cpp
+	$(call ICU_MSG,(deps)) $<
+	@$(SHELL) -ec '$(GEN_DEPS.cc) $< \
+		| sed '\''s%\($*\)\.o[ :]*%\1.o $@ : %g'\'' > $@; \
+		[ -s $@ ] || rm -f $@'
+
+## Versioned libraries rules
+
+%.$(SO).$(SO_TARGET_VERSION_MAJOR): %.$(SO).$(SO_TARGET_VERSION)
+	$(RM) $@ && ln -s ${<F} $@
+%.$(SO): %.$(SO).$(SO_TARGET_VERSION_MAJOR)
+	$(RM) $@ && ln -s ${*F}.$(SO).$(SO_TARGET_VERSION) $@
+
+##  Bind internal references
+
+# LDflags that pkgdata will use
+BIR_LDFLAGS= -Wl,-Bsymbolic
+
+# Dependencies [i.e. map files] for the final library
+BIR_DEPS=
+
+## Remove shared library 's'
+STATIC_PREFIX_WHEN_USED = 
+STATIC_PREFIX = 
+
+## End Linux-specific setup
 
diff '--color=auto' -ur icu4c-71.1/source/config.sub icu4c-71.1.wasm/source/config.sub
--- icu4c-71.1/source/config.sub	2022-04-08 00:41:55.000000000 +0200
+++ icu4c-71.1.wasm/source/config.sub	2023-10-25 13:58:23.711645708 +0200
@@ -312,7 +312,7 @@
 	| ubicom32 \
 	| v850 | v850e | v850e1 | v850e2 | v850es | v850e2v3 \
 	| visium \
-	| wasm32 \
+	| wasm32 | wasm64 \
 	| x86 | xc16x | xstormy16 | xtensa \
 	| z8k | z80)
 		basic_machine=$basic_machine-unknown
@@ -443,7 +443,7 @@
 	| v850-* | v850e-* | v850e1-* | v850es-* | v850e2-* | v850e2v3-* \
 	| vax-* \
 	| visium-* \
-	| wasm32-* \
+	| wasm32-* | wasm64-* \
 	| we32k-* \
 	| x86-* | x86_64-* | xc16x-* | xps100-* \
 	| xstormy16-* | xtensa*-* \
@@ -1247,6 +1247,9 @@
 	wasm32)
 		basic_machine=wasm32-unknown
 		;;
+    wasm64)
+        basic_machine=wasm64-unknown
+        ;;
 	w65*)
 		basic_machine=w65-wdc
 		os=-none
@@ -1416,7 +1419,7 @@
 	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
 	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
 	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
-	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox*)
+	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -emscripten*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-qnx*)