9 lines
206 B
Makefile
9 lines
206 B
Makefile
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all:
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@for x in "" A= A=42; do ${.MAKE} -f ${MAKEFILE} show $$x; done
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show:
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@echo "The answer is ${A:?known:unknown}"
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@echo "The answer is ${A:?$A:unknown}"
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@echo "The answer is ${empty(A):?empty:$A}"
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