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2061c94e6f
Most relevant change: o ignore '.POSIX:' if not in first non-comment line of Makefile as specified by POSIX. add unit-tests for above.
107 lines
3.4 KiB
Makefile
107 lines
3.4 KiB
Makefile
# $NetBSD: varname-dot-suffixes.mk,v 1.3 2022/04/15 09:33:20 rillig Exp $
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#
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# Tests for the special "variable" .SUFFIXES, which lists the suffixes that
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# have been registered for use in suffix transformation rules. Suffixes are
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# listed even if there is no actual transformation rule that uses them.
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#
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# The name '.SUFFIXES' does not refer to a real variable, instead it can be
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# used as a starting "variable name" for expressions like ${.SUFFIXES} or
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# ${.SUFFIXES:M*o}.
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# In the beginning, there are no suffix rules, the expression is thus empty.
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.if ${.SUFFIXES} != ""
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.endif
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# There is no actual variable named '.SUFFIXES', it is all made up.
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.if defined(.SUFFIXES)
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. error
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.endif
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# The suffixes list is still empty, and so is the "variable" '.SUFFIXES'.
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.if !empty(.SUFFIXES)
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. error
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.endif
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.SUFFIXES: .c .o .1 .err
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# The suffixes are listed in declaration order.
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.if ${.SUFFIXES} != ".c .o .1 .err"
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. error
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.endif
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# There is still no actual variable named '.SUFFIXES', it is all made up.
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.if defined(.SUFFIXES)
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. error
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.endif
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# Now the suffixes list is not empty anymore. It may seem strange that there
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# is no variable named '.SUFFIXES' but evaluating '${.SUFFIXES}' nevertheless
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# returns something. For all practical use cases, it's good enough though.
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.if empty(.SUFFIXES)
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. error
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.endif
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.SUFFIXES: .tar.gz
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# Changes to the suffixes list are reflected immediately.
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.if ${.SUFFIXES} != ".c .o .1 .err .tar.gz"
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. error
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.endif
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# Deleting .SUFFIXES has no effect since there is no actual variable of that
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# name.
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.MAKEFLAGS: -dv
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# expect: Global: delete .SUFFIXES (not found)
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.undef .SUFFIXES
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.MAKEFLAGS: -d0
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.if ${.SUFFIXES} != ".c .o .1 .err .tar.gz"
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. error
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.endif
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# The list of suffixes can only be modified using dependency declarations, any
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# attempt at setting the variable named '.SUFFIXES' is rejected.
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.MAKEFLAGS: -dv
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# expect: Global: .SUFFIXES = set ignored (read-only)
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.SUFFIXES= set
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# expect: Global: .SUFFIXES = append ignored (read-only)
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.SUFFIXES+= append
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# expect: Global: .SUFFIXES = assign ignored (read-only)
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_:= ${.SUFFIXES::=assign}
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# expect: Global: .SUFFIXES = preserve ignored (read-only)
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_:= ${preserve:L:_=.SUFFIXES}
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.MAKEFLAGS: -d0
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# Using the name '.SUFFIXES' in a .for loop looks strange because these
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# variable names are typically in singular form, and .for loops do not use
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# real variables either, they are made up as well, see directive-for.mk. The
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# replacement mechanism for the iteration variables takes precedence.
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.for .SUFFIXES in .c .o
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. if ${.SUFFIXES} != ".c" && ${.SUFFIXES} != ".o"
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. error
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. endif
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.endfor
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# After the .for loop, the expression '${.SUFFIXES}' refers to the list of
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# suffixes again.
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.if ${.SUFFIXES} != ".c .o .1 .err .tar.gz"
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. error
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.endif
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# Using the name '.SUFFIXES' in the modifier ':@var@body@' does not create an
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# actual variable either. Like in the .for loop, choosing the name
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# '.SUFFIXES' for the iteration variable is unusual. In ODE Make, the
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# convention for these iteration variables is to have dots at both ends, so
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# the name would be '.SUFFIXES.', furthermore the name of the iteration
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# variable is typically in singular form.
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.MAKEFLAGS: -dv
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# expect: Command: .SUFFIXES = 1 ignored (read-only)
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# expect: Command: .SUFFIXES = 2 ignored (read-only)
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# XXX: Missing space after ':'
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# expect: Command: delete .SUFFIXES (not found)
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.if ${1 2:L:@.SUFFIXES@${.SUFFIXES}@} != ".c .o .1 .err .tar.gz .c .o .1 .err .tar.gz"
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. error
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.endif
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.MAKEFLAGS: -d0
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all:
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