How can I call a specific target from my makefile?

a:
   @echo 1

b:
   @echo 2

c:
   @if [ ! -d  somefolder ]; \
   then \
 # how do I i开发者_开发知识库nvoke target b here?
   fi;

How can I invoke target b inside target c, based on my condition? Sort of like an antcall, if you're familiar with ant.

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Just say make b