43 lines
825 B
Makefile
43 lines
825 B
Makefile
# $Id: varmisc.mk,v 1.5 2015/10/12 17:10:48 sjg Exp $
|
|
#
|
|
# Miscellaneous variable tests.
|
|
|
|
all: unmatched_var_paren D_true U_true D_false U_false Q_lhs Q_rhs NQ_none
|
|
|
|
unmatched_var_paren:
|
|
@echo ${foo::=foo-text}
|
|
|
|
True = ${echo true >&2:L:sh}TRUE
|
|
False= ${echo false >&2:L:sh}FALSE
|
|
|
|
VSET= is set
|
|
.undef UNDEF
|
|
|
|
U_false:
|
|
@echo :U skipped when var set
|
|
@echo ${VSET:U${False}}
|
|
|
|
D_false:
|
|
@echo :D skipped if var undef
|
|
@echo ${UNDEF:D${False}}
|
|
|
|
U_true:
|
|
@echo :U expanded when var undef
|
|
@echo ${UNDEF:U${True}}
|
|
|
|
D_true:
|
|
@echo :D expanded when var set
|
|
@echo ${VSET:D${True}}
|
|
|
|
Q_lhs:
|
|
@echo :? only lhs when value true
|
|
@echo ${1:L:?${True}:${False}}
|
|
|
|
Q_rhs:
|
|
@echo :? only rhs when value false
|
|
@echo ${0:L:?${True}:${False}}
|
|
|
|
NQ_none:
|
|
@echo do not evaluate or expand :? if discarding
|
|
@echo ${VSET:U${1:L:?${True}:${False}}}
|