build: update Makefile to support fat binary

build a binary that is both x86_64 and arm64 on macos

Author: Ash Cripps

Makefile

@@ -982,12 +982,26 @@ $(PKG): release-only
 			| sed -E "s/\\{npmversion\\}/$(NPMVERSION)/g"  \
 		>$(MACOSOUTDIR)/installer/productbuild/Resources/$$lang/conclusion.html ; \
 	done
+	CC_host="cc -arch x86_64" CXX_host="c++ -arch x86_64"  \
+	CC_target="cc -arch x86_64" CXX_target="c++ -arch x86_64" \
+	CC="cc -arch x86_64" CXX="c++ -arch x86_64" $(PYTHON) ./configure \
+		--dest-cpu=x86_64 \
+		--tag=$(TAG) \
+		--release-urlbase=$(RELEASE_URLBASE) \
+		$(CONFIG_FLAGS) $(BUILD_RELEASE_FLAGS)
+	arch -x86_64 $(MAKE) install V=$(V) DESTDIR=$(MACOSOUTDIR)/dist/x64/node
+	SIGN="$(CODESIGN_CERT)" PKGDIR="$(MACOSOUTDIR)/dist/node/usr/local" sh \
+		tools/osx-codesign.sh
 	$(PYTHON) ./configure \
-		--dest-cpu=x64 \
+		--dest-cpu=arm64 \
 		--tag=$(TAG) \
 		--release-urlbase=$(RELEASE_URLBASE) \
 		$(CONFIG_FLAGS) $(BUILD_RELEASE_FLAGS)
-	$(MAKE) install V=$(V) DESTDIR=$(MACOSOUTDIR)/dist/node
+	$(MAKE) install V=$(V) DESTDIR=$(MACOSOUTDIR)/dist/arm64/node
+	lipo $(MACOSOUTDIR)/dist/x64/node/usr/local/bin/node \
+		$(MACOSOUTDIR)/dist/arm64/node/usr/local/bin/node \
+		-output $(MACOSOUTDIR)/dist/node \
+		-create
 	SIGN="$(CODESIGN_CERT)" PKGDIR="$(MACOSOUTDIR)/dist/node/usr/local" sh \
 		tools/osx-codesign.sh
 	mkdir -p $(MACOSOUTDIR)/dist/npm/usr/local/lib/node_modules