make 中多行

Question

我试图在 make 的变量中存储多行字符串，

var=$(shell cat <<End-of-message \
-------------------------------------\
This is line 1 of the message.\
This is line 2 of the message.\
This is line 3 of the message.\
This is line 4 of the message.\
This is the last line of the message.\
-------------------------------------\
End-of-message)


printit:
    @echo ${var}

但这不起作用，所以我想知道这是否可能。我需要在这里保留换行符，shell 正在将它们转换为空格。有什么建议吗？

Answer 1

这个怎么样：

define var
@echo -------------------------------------
@echo This is line 1 of the message.
@echo This is line 2 of the message.
@echo This is line 3 of the message.
@echo This is line 4 of the message.
@echo This is the last line of the message.
@echo -------------------------------------
endef

printit:
    ${var}

或者这个：

.PHONY: var
var:
    @echo -------------------------------------
    @echo This is line 1 of the message.
    @echo This is line 2 of the message.
    @echo This is line 3 of the message.
    @echo This is line 4 of the message.
    @echo This is the last line of the message.
    @echo -------------------------------------

printit: var