继续翻译

Variable Assignment
-------------------                        Variable definitions are parsed as follows:                        IMMEDIATE = DEFERRED                        IMMEDIATE ?= DEFERRED                        IMMEDIATE := IMMEDIATE                        IMMEDIATE += DEFERRED or IMMEDIATE                        define IMMEDIATE                        DEFERRED                        endef                        define IMMEDIATE =                        DEFERRED                        endef                        define IMMEDIATE ?=                        DEFERRED                        endef                        define IMMEDIATE :=                        IMMEDIATE                        endef                        define IMMEDIATE +=                        DEFERRED or IMMEDIATE                        endef                        For the append operator, `+=', the right-hand side is considered
immediate if the variable was previously set as a simple variable
(`:='), and deferred otherwise.

变量定义被如下解析：

IMMEDIATE = DEFERRED
IMMEDIATE ?= DEFERRED
IMMEDIATE := IMMEDIATE
IMMEDIATE += DEFERRED or IMMEDIATE

define IMMEDIATE
DEFERRED
endef

define IMMEDIATE =
DEFERRED
endef

define IMMEDIATE ?=
DEFERRED
endef

define IMMEDIATE :=
IMMEDIATE
endef

define IMMEDIATE +=
DEFERRED or IMMEDIATE
endef

For the append operator, `+=', the right-hand side is considered
immediate if the variable was previously set as a simple variable
(`:='), and deferred otherwise.

对于连接符号 +=， 如果变量已经被定义为一个简单变量(:=)，那么右手边就被认为是立即性的，

否则就是推迟性的。

后文待续

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