ReadMe.md

How to include/import shell vars/exports in a Makefile (GNU/Make)

See https://unix.stackexchange.com/questions/235223/makefile-include-env-file and others.

env.sh

#!/bin/sh

foo=bar

fnmatch() { case "$1" in $2 ) return ;; esac ; return 1 ; }

Makefile load shell exports.make

#!/usr/bin/make
default:

.PHONY: default install

BASH := $(shell which bash)
export BASH_ENV=env.sh

$(info 0 foo=$(foo) $(shell echo foo=$$foo))


define test
  echo 1 foo=$$foo 
  sh -c 'echo 2.1 foo=$$foo ' || true

  sh -l -c 'echo 2.2 foo=$$foo ' || true
  bash -c 'echo 3.1 foo=$$foo ' || true

  bash -l -c 'echo 3.2 foo=$$foo ' || true
  bash --posix -l -c 'echo 3.3 foo=$$foo ' || true
endef


test-1:
	@$(call test)

test-2: SHELL := $(BASH)
test-2:
	@$(call test)


test-0.0: SHELL := $(BASH)
test-0.0:
	type fnmatch

# XXX: This does not work with CYGWIN, but does with Darwin, Linux
test-0.1:
	type fnmatch

test-0: test-0.0 test-0.1
test: test-0 test-1 test-2


# This does not work (Darwin, CYGWIN, Linux):
SHELL := $(BASH)
export BASH_ENV=env.sh

$(info 8 foo=$(foo) $(shell echo foo=$$foo))
$(info 8 foo=$(foo) $(shell bash -c 'echo foo=$$foo'))

# But this does..
export foo=bar
$(info 9 foo=$(foo) $(shell echo foo=$$foo))
$(info 9 foo=$(foo) $(shell bash -c 'echo foo=$$foo'))