Is it possible to use a variable exported from a bash script inside a make file?

Question

I believe that you can use the value of the environment variable inside the make file.

Since I am new to bash and doing, it was a difficult time to figure out how.

I tried the following but did not succeed.

In bash

TEST_VAR=1 export TEST_VAR 

In the make file

 ifeq ($(TEST_VAR),1) COMMON_OBJECTS += Test1.o endif 

But it does not compile Test1.cpp.

My makefile contains only these lines, and I add COMMON_OBJECTS to another variable defined in another file.

If I comment on this ifeq condition, then Test1 will be compiled. But I'm looking for a way to do this conditionally.

What am I missing here?

Answer 1

if you execute the "In bash" commands in a bash script file, you need to execute it with the previous ".". that is, if the bash file is called a "script", then

 $ . script $ make 

this is because each script runs in its own instance of bash, unless you chase it with .. it then runs on the same bash that calls it.