Windows下MinGW64执行Go项目Makefile报错：missing separator

问题重现 #

在Windows的MinGW64环境中执行Go项目的Makefile时，持续出现如下报错：

Makefile:5: *** missing separator.

原Makefile内容：

BINARY_NAME=celeritasApp.exe

## build: builds all binaries
build:
    @go mod vendor
    @go build -o tmp/${BINARY_NAME} .
    @echo Celeritas built!

run: build
    @echo Staring Celeritas...
    @.	mp\${BINARY_NAME} &
    @echo Celeritas started!

clean:
    @echo Cleaning...
    @go clean
    @del .\tmp\${BINARY_NAME}
    @echo Cleaned!

test:
    @echo Testing...
    @go test ./...
    @echo Done!

start: run
    
stop:
    @echo "Starting the front end..."
    @taskkill /IM ${BINARY_NAME} /F
    @echo Stopped Celeritas

restart: stop start

使用的make版本：

xxxx@xxxxx MSYS /c/dev/my/go_apps/myapp
$ make --version
GNU Make 4.3
Built for x86_64-pc-msys
Copyright (C) 1988-2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

报错原因分析 #

该报错的核心原因是Makefile对缩进格式有严格要求：所有目标下的命令行必须使用Tab键缩进，不能用空格或者Tab+空格混合；同时原Makefile还存在两处细节错误：

1. build、run等目标下的命令用了空格缩进，而非Tab
2. run目标中的. mp\${BINARY_NAME}是拼写错误（Tab误替换了/），实际应为./tmp/${BINARY_NAME}
3. start目标下存在无意义的空行，可能触发格式校验问题

修复后的Makefile #

BINARY_NAME=celeritasApp.exe

## build: builds all binaries
build:
	@go mod vendor
	@go build -o tmp/${BINARY_NAME} .
	@echo Celeritas built!

run: build
	@echo Starting Celeritas...
	@./tmp/${BINARY_NAME} &
	@echo Celeritas started!

clean:
	@echo Cleaning...
	@go clean
	@del .\tmp\${BINARY_NAME}
	@echo Cleaned!

test:
	@echo Testing...
	@go test ./...
	@echo Done!

start: run

stop:
	@echo Stopping Celeritas...
	@taskkill /IM ${BINARY_NAME} /F
	@echo Stopped Celeritas

restart: stop start

关键注意事项 #

• 必须确保所有目标下的命令行前是单个Tab键，不要用空格代替（很多编辑器默认会把Tab转成空格，需在编辑器设置中关闭此功能）
• 路径在MinGW64环境中可以使用/或\，但要注意拼写准确，避免输入错误
• 顺带修正了run目标中的拼写错误（Staring改为Starting），同时调整了stop目标的提示文本更贴合实际操作

内容的提问来源于stack exchange，提问作者user63898