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authorJason A. Donenfeld <Jason@zx2c4.com>2018-10-12 01:12:00 +0200
committerJason A. Donenfeld <Jason@zx2c4.com>2018-10-12 01:12:56 +0200
commitfddb9490025c4c9b5fb1b77028a54fc92fa39c45 (patch)
treeb7cd70c89395028fdaa951d5fe56f700058a605f /Makefile
parent5d6083df7e0399d9cbb47a9dc0b227fd86ccffbb (diff)
Do not build if nothing to do
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile31
1 files changed, 19 insertions, 12 deletions
diff --git a/Makefile b/Makefile
index 6b95f89..46d35cb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,26 +1,33 @@
PREFIX ?= /usr
DESTDIR ?=
BINDIR ?= $(PREFIX)/bin
+export GOPATH ?= $(CURDIR)/.gopath
+
+default: generate-version-and-build
-ifeq ($(shell go env GOOS),linux)
-ifeq ($(wildcard .git),)
+ifeq ($(shell go env GOOS)|$(wildcard .git),linux|)
$(error Do not build this for Linux. Instead use the Linux kernel module. See wireguard.com/install/ for more info.)
else
-$(shell printf 'package main\nconst UseTheKernelModuleInstead = 0xdeadbabe\n' > ireallywantobuildon_linux.go)
-endif
+ireallywantobuildon_linux.go:
+ @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
+ @printf 'package main\nconst UseTheKernelModuleInstead = 0xdeadbabe\n' > "$@"
+clean-ireallywantobuildon_linux.go:
+ @rm -f ireallywantobuildon_linux.go
+.PHONY: clean-ireallywantobuildon_linux.go
+clean: clean-ireallywantobuildon_linux.go
+wireguard-go: ireallywantobuildon_linux.go
endif
-export GOPATH ?= $(CURDIR)/.gopath
-
-all: wireguard-go
+MAKEFLAGS += --no-print-directory
-version.go:
+generate-version-and-build:
@export GIT_CEILING_DIRECTORIES="$(realpath $(CURDIR)/..)" && \
tag="$$(git describe --dirty 2>/dev/null)" && \
ver="$$(printf 'package main\nconst WireGuardGoVersion = "%s"\n' "$$tag")" && \
- [ "$$(cat $@ 2>/dev/null)" != "$$ver" ] && \
- echo "$$ver" > $@ && \
- git update-index --assume-unchanged $@ || true
+ [ "$$(cat version.go 2>/dev/null)" != "$$ver" ] && \
+ echo "$$ver" > version.go && \
+ git update-index --assume-unchanged version.go || true
+ @$(MAKE) wireguard-go
wireguard-go: $(wildcard *.go) $(wildcard */*.go)
go build -v -o "$@"
@@ -31,4 +38,4 @@ install: wireguard-go
clean:
rm -f wireguard-go
-.PHONY: clean install version.go
+.PHONY: default clean install generate-version-and-build