46 lines
1.3 KiB
Makefile
46 lines
1.3 KiB
Makefile
# $NetBSD: var-class-local.mk,v 1.5 2020/11/05 18:08:39 rillig Exp $
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#
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# Tests for target-local variables, such as ${.TARGET} or $@.
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# TODO: Implementation
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# Ensure that the name of the variable is exactly the given one.
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# The variable "@" is an alias for ".TARGET", so the implementation might
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# canonicalize these aliases at some point, and that might be surprising.
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# This aliasing happens for single-character variable names like $@ or $<
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# (see VarFind, CanonicalVarname), but not for braced or parenthesized
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# expressions like ${@}, ${.TARGET} ${VAR:Mpattern} (see Var_Parse,
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# ParseVarname).
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.if ${@:L} != "@"
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. error
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.endif
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.if ${.TARGET:L} != ".TARGET"
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. error
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.endif
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.if ${@F:L} != "@F"
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. error
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.endif
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.if ${@D:L} != "@D"
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. error
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.endif
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all:
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.SUFFIXES: .c .o
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var-class-local.c:
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: Making ${.TARGET} out of nothing.
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.c.o:
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: Making ${.TARGET} from ${.IMPSRC}.
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# The local variables @F, @D, <F, <D are legacy forms.
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# See the manual page for details.
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: Making basename "${@F}" in "${@D}" from "${<F}" in "${<D}".
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all: var-class-local.o
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# The ::= modifier overwrites the .TARGET variable in the node
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# 'all', not in the global scope. This can be seen with the -dv
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# option, looking for "all:@ = overwritten".
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: ${.TARGET} ${.TARGET::=overwritten}${.TARGET}
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