Overwrite variable from makefile

Question

In my makefile I have a variable FOO:

FOO = /path/to/bar

Is it possible to overwrite this variable during the makefile call? S

Answer 1

Specify them as Var=Value before you specify the target, like make FOO=/path/to/foo all.

$ cat Makefile 
Foo = asdf

all:
    echo $(Foo)

$ make all
echo asdf
asdf
$ make Foo=bar all
echo bar
bar