build for all supported platforms when testing

fixes #4427

License: MIT
Signed-off-by: Steven Allen <steven@stebalien.com>

cmd/ipfs/Rules.mk

@@ -2,6 +2,7 @@ include mk/header.mk
 IPFS_BIN_$(d) := $(call go-curr-pkg-tgt)
 
 TGT_BIN += $(IPFS_BIN_$(d))
+TEST += $(d)-try-build
 CLEAN += $(IPFS_BIN_$(d))
 
 PATH := $(realpath $(d)):$(PATH)
@@ -14,12 +15,22 @@ PATH := $(realpath $(d)):$(PATH)
 
 $(d)_flags =-ldflags="-X "github.com/ipfs/go-ipfs/repo/config".CurrentCommit=$(shell git rev-parse --short HEAD)" 
 
-$(IPFS_BIN_$(d)): GOFLAGS += $(cmd/ipfs_flags)
+$(d)-try-build $(IPFS_BIN_$(d)): GOFLAGS += $(cmd/ipfs_flags)
 
 # uses second expansion to collect all $(DEPS_GO)
 $(IPFS_BIN_$(d)): $(d) $$(DEPS_GO) ALWAYS #| $(DEPS_OO_$(d))
 	$(go-build)
 
+TRY_BUILD_$(d)=$(addprefix $(d)-try-build-,$(SUPPORTED_PLATFORMS))
+$(d)-try-build: $(TRY_BUILD_$(d))
+.PHONY: $(d)-try-build
+
+$(TRY_BUILD_$(d)): private PLATFORM = $(subst -, ,$(patsubst $<-try-build-%,%,$@))
+$(TRY_BUILD_$(d)): private GOOS = $(word 1,$(PLATFORM))
+$(TRY_BUILD_$(d)): private GOARCH = $(word 2,$(PLATFORM))
+$(TRY_BUILD_$(d)): $(d) $$(DEPS_GO) ALWAYS
+	GOOS=$(GOOS) GOARCH=$(GOARCH) $(go-try-build)
+.PHONY: $(TRY_BUILD_$(d))
 
 $(d)-install: GOFLAGS += $(cmd/ipfs_flags)
 $(d)-install: $(d) $$(DEPS_GO) ALWAYS 

mk/golang.mk

@@ -23,6 +23,10 @@ define go-build
 $(GOCC) build -i $(go-flags-with-tags) -o "$@" "$(call go-pkg-name,$<)"
 endef
 
+define go-try-build
+$(GOCC) build $(go-flags-with-tags) -o /dev/null "$(call go-pkg-name,$<)"
+endef
+
 test_go_short: GOTFLAGS += -test.short
 test_go_short: test_go_expensive
 .PHONY: test_go_short

mk/util.mk

@@ -9,6 +9,17 @@ else
 	PATH_SEP :=:
 endif
 
+# SUPPORTED_PLATFORM += windows/386 FIXME: #4438 (badger bug)
+SUPPORTED_PLATFORMS += windows-amd64
+
+SUPPORTED_PLATFORMS += linux-arm
+SUPPORTED_PLATFORMS += linux-arm64
+SUPPORTED_PLATFORMS += linux-386
+SUPPORTED_PLATFORMS += linux-amd64
+
+SUPPORTED_PLATFORMS += darwin-386
+SUPPORTED_PLATFORMS += darwin-amd64
+
 space:=
 space+=
 comma:=,