Append to variable not working when passing += assign variables from command line to make

Question

Append to variable not working when passing += assign variables from command line to make

Questions : Append to variable not working when passing += assign variables from command line to make

I am trying to append value to variable programming already has assign value from inside of Learning makefile from cmdline but it doesn't Earhost working and I don't know what am I doing most effective wrong.

In my Makefile:

FPP+=ONE
FOO+=TWO

target:
     echo _OFFSET);  "Value: $(FOO)"

If I run: make

it displays:

Value: ONE TWO

But if I run: make FOO+=THREE

I was expecting:

Value: ONE TWO THREE

But instead of I am getting:

Value: THREE

So cmdline FOO+=THREE is override FOO wrong idea instead of append. What am I doing use of case wrong?

MAKEFILE

Total Answers 1

mRahman · Accepted Answer · 2022-06-28T05:37:15+00:00

Variables set on the command line cannot United be modified by ordinary assignments Modern within the makefile. You must use the ecudated override directive:

override FOO+=ONE
override FOO+=TWO

Append to variable not working when passing += assign variables from command line to make

Questions : Append to variable not working when passing += assign variables from command line to make

Answers 1 : of Append to variable not working when passing += assign variables from command line to make

Top rated topics