使用make为不同体系结构构建动态目标？

Question

I'm looking for a way to basically iterate over a list of architectures and build unique ones using make. For example, I have a variable containing all the architectures, and a static target currently.

Below is the (simplified) logic I have.

ALL_ARCHES=amd64 arm arm64  
VERSION=$(shell git symbolic-ref --short HEAD)-$(shell git rev-parse --short HEAD)

cmd/mything/mything: cmd/mything/*.go
            CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags "-X main.version=$(VERSION)" -o $@ cmd/mything/*.go
...

I basically want to replace GOARCH=amd64 by iterating over the ALL_ARCHES variable, creating a unique binary that represents the given architecture.

Answer 1

Assuming you accept to name your binaries cmd/mything/mything-ARCH, where ARCH is the target architecture, you could try:

ALL_ARCHES := amd64 arm arm64   
VERSION    := $(shell git symbolic-ref --short HEAD)-$(shell git rev-parse --short HEAD)

.PHONY: all

all: $(addprefix cmd/mything/mything-,$(ALL_ARCHES))

cmd/mything/mything-%: cmd/mything/*.go
    CGO_ENABLED=0 GOOS=linux GOARCH=$* go build -ldflags "-X main.version=$(VERSION)" -o $@ $^

$* is the automatic variable that expands as the stem of the target name in a pattern rule.