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