Makefile: modify the manpages and docsy targets to only run when building a native limactl.

Signed-off-by: Norio Nomura <[email protected]>

Author: norio-nomura

Makefile

@@ -338,6 +338,13 @@ else
 	cp -aL $< $@
 endif
 
+################################################################################
+# returns difference between GOOS GOARCH and GOHOSTOS GOHOSTARCH.
+cross_compiling = $(call diff,$(GOOS) $(GOARCH),$(GOHOSTOS) $(GOHOSTARCH))
+# returns true if cross_compiling is empty.
+native_compiling = $(if $(cross_compiling),,true)
+
+################################################################################
 # _output/share/man/man1
 .PHONY: manpages
 # Set limactl.1 as explicit dependency. 
@@ -346,8 +353,11 @@ endif
 manpages: _output/share/man/man1/limactl.1
 _output/share/man/man1/limactl.1: _output/bin/limactl$(exe)
 	@mkdir -p _output/share/man/man1
+ifeq ($(native_compiling),true)
+# The manpages are generated by limactl, so the limactl binary must be native.
 	$< generate-doc _output/share/man/man1 \
 		--output _output --prefix $(PREFIX)
+endif
 
 ################################################################################
 .PHONY: docsy
@@ -357,8 +367,11 @@ _output/share/man/man1/limactl.1: _output/bin/limactl$(exe)
 docsy: website/_output/docsy/limactl.md
 website/_output/docsy/limactl.md: _output/bin/limactl$(exe)
 	@mkdir -p website/_output/docsy
+ifeq ($(native_compiling),true)
+# The docs are generated by limactl, so the limactl binary must be native.
 	$< generate-doc --type docsy website/_output/docsy \
 		--output _output --prefix $(PREFIX)
+endif
 
 ################################################################################
 .PHONY: diagrams