Makefile doesn't detect Python

Question

I've got the following in my Makefile,

dosomething:
    ifeq (, $(shell which python))
        $(error "Python not installed, please download and install Python to create database")
    else
        cd myfolder; python myfile.py
    endif

When I run make dosomething, it throws the error telling me to download and install python. But when I do which python in my shell, it says /usr/bin/python

Not sure what is going on here

Do the ifeq, else and endif lines begin with a tab character? If so, try removing it. — G.M.
– G.M., Commented Aug 30, 2018 at 11:20
Just to simplify the problem, you could try $(info $(shell which python)). — Beta
– Beta, Commented Aug 30, 2018 at 16:27

G.M. · Accepted Answer · 2018-08-31 05:03:32Z

2

I'm guessing the indented lines begin with a tab character? If so then the ifeq, else and endif directives will be considered to be part of the command and passed to the shell for execution.

To ensure make evaluates those directives remove the leading tabs...

dosomething:
ifeq (, $(shell which python))
        $(error "Python not installed, please download and install Python to create database")
else
        cd myfolder; python myfile.py
endif

answered Aug 31, 2018 at 5:03

G.M.

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