1
 2FOO = foo
 3BAR = bar
 4BOZ = boz
 5
 6export BAZ = baz
 7export BOZ
 8
 9BITZ = bitz
10BOTZ = botz
11
12export BITZ BOTZ
13unexport BOTZ
14
15ifdef EXPORT_ALL
16export
17endif
18
19ifdef UNEXPORT_ALL
20unexport
21endif
22
23ifdef EXPORT_ALL_PSEUDO
24.EXPORT_ALL_VARIABLES:
25endif
26
27.RECIPEPREFIX := >
28all:
29> @echo "FOO=$(FOO) BAR=$(BAR) BAZ=$(BAZ) BOZ=$(BOZ) BITZ=$(BITZ) BOTZ=$(BOTZ)"
30> @echo "FOO=$$FOO BAR=$$BAR BAZ=$$BAZ BOZ=$$BOZ BITZ=$$BITZ BOTZ=$$BOTZ"