diff options
Diffstat (limited to 'contrib/bmake/unit-tests/envfirst.mk')
| -rw-r--r-- | contrib/bmake/unit-tests/envfirst.mk | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/contrib/bmake/unit-tests/envfirst.mk b/contrib/bmake/unit-tests/envfirst.mk new file mode 100644 index 000000000000..f4744bd61285 --- /dev/null +++ b/contrib/bmake/unit-tests/envfirst.mk @@ -0,0 +1,42 @@ +# $NetBSD: envfirst.mk,v 1.2 2020/07/27 18:57:42 rillig Exp $ +# +# The -e option makes environment variables stronger than global variables. + +.if ${FROM_ENV} != value-from-env +.error ${FROM_ENV} +.endif + +# Try to override the variable; this does not have any effect. +FROM_ENV= value-from-mk +.if ${FROM_ENV} != value-from-env +.error ${FROM_ENV} +.endif + +# Try to append to the variable; this also doesn't have any effect. +FROM_ENV+= appended +.if ${FROM_ENV} != value-from-env +.error ${FROM_ENV} +.endif + +# The default assignment also cannot change the variable. +FROM_ENV?= default +.if ${FROM_ENV} != value-from-env +.error ${FROM_ENV} +.endif + +# Neither can the assignment modifiers. +.if ${FROM_ENV::=from-condition} +.endif +.if ${FROM_ENV} != value-from-env +.error ${FROM_ENV} +.endif + +# Even .undef doesn't work since it only affects the global context, +# which is independent from the environment variables. +.undef FROM_ENV +.if ${FROM_ENV} != value-from-env +.error ${FROM_ENV} +.endif + +all: + @: nothing |