make中的多行[重复]答案

【问题标题】：Multiple lines in make [duplicate]make中的多行[重复]
【发布时间】：2010-05-13 15:01:13
【问题描述】：

我正在尝试将多行字符串存储在 make 中的变量中

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}

这不起作用，所以我想知道这是否可能。我需要在此处保留换行符，并且 shell 将它们转换为空格。有什么建议吗？

【问题讨论】：

有什么原因你不能在外部文件中而不是在 makefile 中使用需要使用的文本？
这能回答你的问题吗？ Is it possible to create a multi-line string variable in a Makefile

标签： makefile

【解决方案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

【讨论】：