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34 lines
1.3 KiB
Makefile
34 lines
1.3 KiB
Makefile
# $NetBSD: varparse-dynamic.mk,v 1.7 2023/06/01 20:56:35 rillig Exp $
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# Before 2020-07-27, there was an off-by-one error in Var_Parse that skipped
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# the last character in the variable name.
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# To trigger the bug, the variable had to be undefined.
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.if ${.TARGET} # exact match, may be undefined
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.endif
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# expect+1: Malformed conditional (${.TARGEX})
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.if ${.TARGEX} # 1 character difference, must be defined
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.endif
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# expect+1: Malformed conditional (${.TARGXX})
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.if ${.TARGXX} # 2 characters difference, must be defined
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.endif
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# When a dynamic variable (such as .TARGET) is evaluated in the global
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# scope, it is not yet ready to be expanded. Therefore the complete
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# expression is returned as the variable value, hoping that it can be
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# resolved at a later point.
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#
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# This test covers the code in Var_Parse that deals with DEF_UNDEF but not
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# DEF_DEFINED for dynamic variables.
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.if ${.TARGET:S,^,,} != "\${.TARGET:S,^,,}"
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. error
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.endif
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# If a dynamic variable is expanded in a non-local scope, the expression
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# based on this variable is not expanded. But there may be nested variable
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# expressions in the modifiers, and these are kept unexpanded as well.
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.if ${.TARGET:M${:Ufallback}} != "\${.TARGET:M\${:Ufallback}}"
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. error
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.endif
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.if ${.TARGET:M${UNDEF}} != "\${.TARGET:M\${UNDEF}}"
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. error
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.endif
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