Do not build if nothing to do
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parent
5d6083df7e
commit
fddb949002
37
Makefile
37
Makefile
@ -1,26 +1,33 @@
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PREFIX ?= /usr
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DESTDIR ?=
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BINDIR ?= $(PREFIX)/bin
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ifeq ($(shell go env GOOS),linux)
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ifeq ($(wildcard .git),)
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$(error Do not build this for Linux. Instead use the Linux kernel module. See wireguard.com/install/ for more info.)
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else
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$(shell printf 'package main\nconst UseTheKernelModuleInstead = 0xdeadbabe\n' > ireallywantobuildon_linux.go)
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endif
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endif
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export GOPATH ?= $(CURDIR)/.gopath
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all: wireguard-go
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default: generate-version-and-build
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version.go:
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ifeq ($(shell go env GOOS)|$(wildcard .git),linux|)
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$(error Do not build this for Linux. Instead use the Linux kernel module. See wireguard.com/install/ for more info.)
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else
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ireallywantobuildon_linux.go:
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@printf "WARNING: This software is meant for use on non-Linux\nsystems. For Linux, please use the kernel module\ninstead. See wireguard.com/install/ for more info.\n\n" >&2
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@printf 'package main\nconst UseTheKernelModuleInstead = 0xdeadbabe\n' > "$@"
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clean-ireallywantobuildon_linux.go:
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@rm -f ireallywantobuildon_linux.go
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.PHONY: clean-ireallywantobuildon_linux.go
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clean: clean-ireallywantobuildon_linux.go
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wireguard-go: ireallywantobuildon_linux.go
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endif
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MAKEFLAGS += --no-print-directory
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generate-version-and-build:
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@export GIT_CEILING_DIRECTORIES="$(realpath $(CURDIR)/..)" && \
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tag="$$(git describe --dirty 2>/dev/null)" && \
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ver="$$(printf 'package main\nconst WireGuardGoVersion = "%s"\n' "$$tag")" && \
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[ "$$(cat $@ 2>/dev/null)" != "$$ver" ] && \
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echo "$$ver" > $@ && \
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git update-index --assume-unchanged $@ || true
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[ "$$(cat version.go 2>/dev/null)" != "$$ver" ] && \
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echo "$$ver" > version.go && \
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git update-index --assume-unchanged version.go || true
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@$(MAKE) wireguard-go
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wireguard-go: $(wildcard *.go) $(wildcard */*.go)
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go build -v -o "$@"
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@ -31,4 +38,4 @@ install: wireguard-go
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clean:
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rm -f wireguard-go
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.PHONY: clean install version.go
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.PHONY: default clean install generate-version-and-build
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