makefile info和eval区别

info 相当于宏展开，而eval相当于计算

pointer:=pointed_valuedefine fooval:=123arg:=$1$($(1)):=ooooendef#$(info $(call foo,pointer))$(eval $(call foo,pointer)).PHONY:targettarget:    @echo ------------    @echo var:$(var),arg:$(arg)    @echo pointer:$(pointer),pointed_value:$(pointed_value)    @echo done    @echo -------------

实例中：

• makefile中定义一个宏foo,第一个参数为$1
• info只是展开宏，不做计算，call调用“函数” foo,参数pointer
• eval计算，call调用”函数” foo,参数为pointer