32 lines
785 B
Makefile
32 lines
785 B
Makefile
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# $NetBSD: varmod-l-name-to-value.mk,v 1.3 2020/08/25 22:25:05 rillig Exp $
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#
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# Tests for the :L modifier, which returns the variable name as the new value.
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# The empty variable name leads to an empty string.
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.if ${:L} != ""
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.error
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.endif
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# The variable name is converted into an expression with the variable name
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# "VARNAME" and the value "VARNAME".
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.if ${VARNAME:L} != "VARNAME"
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.error
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.endif
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# The value of the expression can be modified afterwards.
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.if ${VARNAME:L:S,VAR,,} != "NAME"
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.error
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.endif
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# The name of the expression is still the same as before. Using the :L
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# modifier, it can be restored.
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#
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# Hmmm, this can be used as a double storage or a backup mechanism.
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# Probably unintended, but maybe useful.
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.if ${VARNAME:L:S,VAR,,:L} != "VARNAME"
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.error
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.endif
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all:
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@:;
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