2c3632d14f
Lots of code refactoring, simplification and cleanup. Lots of new unit-tests providing much higher code coverage. All courtesy of rillig at netbsd. Other significant changes: o new read-only variable .SHELL which provides the path of the shell used to run scripts (as defined by the .SHELL target). o variable parsing detects more errors. o new debug option -dl: LINT mode, does the equivalent of := for all variable assignments so that file and line number are reported for variable parse errors.
64 lines
1.5 KiB
Makefile
64 lines
1.5 KiB
Makefile
# $NetBSD: cond-func.mk,v 1.1 2020/08/20 17:45:47 rillig Exp $
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#
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# Tests for those parts of the functions in .if conditions that are common
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# among several functions.
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#
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# The below test uses the function defined(...) since it has no side-effects,
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# the other functions (except empty(...)) would work equally well.
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DEF= defined
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${:UA B}= variable name with spaces
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${:UVAR(value)}= variable name with parentheses
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${:UVAR{value}}= variable name with braces
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.if !defined(DEF)
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.error
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.endif
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# Horizontal whitespace after the opening parenthesis is ignored.
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.if !defined( DEF)
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.error
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.endif
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# Horizontal whitespace before the closing parenthesis is ignored.
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.if !defined(DEF )
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.error
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.endif
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# The argument of a function must not directly contain whitespace.
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.if !defined(A B)
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.error
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.endif
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# If necessary, the whitespace can be generated by a variable expression.
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.if !defined(${:UA B})
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.error
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.endif
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# Characters that could be mistaken for operators must not appear directly
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# in a function argument. As with whitespace, these can be generated
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# indirectly.
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#
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# It's not entirely clear why these characters are forbidden.
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# The most plausible reason seems to be typo detection.
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.if !defined(A&B)
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.error
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.endif
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.if !defined(A|B)
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.error
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.endif
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# Even parentheses may appear in variable names.
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# They must be balanced though.
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.if !defined(VAR(value))
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.error
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.endif
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# Braces do not have any special meaning when parsing arguments.
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.if !defined(VAR{value})
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.error
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.endif
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all:
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@:;
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