feat: make multiarch

Makefile

@@ -60,6 +60,11 @@ export USAGE_OPTIONS
 build:
 	@$(MAKE) go.build
 
+## multiarch: Build binaries for multiple platforms. See option PLATFORMS.
+.PHONY: build-multiarch
+build-multiarch:
+	@$(MAKE) go.build.multiarch
+
 ## tidy: tidy go.mod
 .PHONY: tidy
 tidy:

script/make-rules/common.mk

@@ -150,8 +150,8 @@ define MAKEFILE_EXAMPLE
 # make linux.arm64                                               imctl is compiled on arm64 platform.
 # make verify-copyright                                          Verify the license headers for all files.
 # make install-deepcopy-gen                                      Install deepcopy-gen tools if the license is missing.
-# make build BINS=imctl V=1 DEBUG=1                             Build debug binaries for only imctl.
-# make multiarch PLATFORMS="linux_arm64 linux_amd64" V=1   Build binaries for both platforms.
+# make build BINS=imctl V=1 DEBUG=1                              Build debug binaries for only imctl.
+# make multiarch PLATFORMS="linux_arm64 linux_amd64" V=1         Build binaries for both platforms.
 endef
 export MAKEFILE_EXAMPLE