Question

I’m trying to do something like it

@if[[ 1==1 ]] then;\
   COMPILER_CMD = -fPic;\
fi;

But if i call in the next line the variable it don’t work.
If i define it outside the if it works perfect.
Someone can help me?

Answer 1

As everyone is saying, you haven’t given us enough information. But I’ll make a guess. You want to set this variable conditionally, then use it elsewhere in the makefile, and in other makefiles which include this one.

The trouble is that you are trying to use shell syntax. In a command this will work (if the syntax is correct), but the value will apply only in that command. Outside commands, shell syntax is just wrong and will cause an error, malfunction, or be ignored depending on exactly what you do.

Try this in the makefile, outside of any rule (that is, not in the recipe for any particular target):

ifeq (1,1)
COMPILER_CMD = -fPic
endif

$(info $(COMPILER_CMD))

If that works, then you can try to adapt it to do whatever it is you’re actually trying to do.