1# $NetBSD: varparse-dynamic.mk,v 1.5 2021/02/22 20:38:55 rillig Exp $ 2 3# Before 2020-07-27, there was an off-by-one error in Var_Parse that skipped 4# the last character in the variable name. 5# To trigger the bug, the variable must not be defined. 6.if ${.TARGET} # exact match, may be undefined 7.endif 8.if ${.TARGEX} # 1 character difference, must be defined 9.endif 10.if ${.TARGXX} # 2 characters difference, must be defined 11.endif 12 13# When a dynamic variable (such as .TARGET) is evaluated in the global 14# scope, it is not yet ready to be expanded. Therefore the complete 15# expression is returned as the variable value, hoping that it can be 16# resolved at a later point. 17# 18# This test covers the code in Var_Parse that deals with DEF_UNDEF but not 19# DEF_DEFINED for dynamic variables. 20.if ${.TARGET:S,^,,} != "\${.TARGET:S,^,,}" 21. error 22.endif 23 24# If a dynamic variable is expanded in a non-local scope, the expression 25# based on this variable is not expanded. But there may be nested variable 26# expressions in the modifiers, and these are kept unexpanded as well. 27.if ${.TARGET:M${:Ufallback}} != "\${.TARGET:M\${:Ufallback}}" 28. error 29.endif 30.if ${.TARGET:M${UNDEF}} != "\${.TARGET:M\${UNDEF}}" 31. error 32.endif 33 34all: 35 @: 36