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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.
34 lines
693 B
Makefile
34 lines
693 B
Makefile
# $NetBSD: cond-token-var.mk,v 1.3 2020/08/20 19:43:42 rillig Exp $
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#
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# Tests for variables in .if conditions.
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DEF= defined
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# A defined variable may appear on either side of the comparison.
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.if ${DEF} == ${DEF}
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.info ok
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.else
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.error
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.endif
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# A variable that appears on the left-hand side must be defined.
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.if ${UNDEF} == ${DEF}
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.error
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.endif
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# A variable that appears on the right-hand side must be defined.
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.if ${DEF} == ${UNDEF}
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.error
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.endif
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# A defined variable may appear as an expression of its own.
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.if ${DEF}
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.endif
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# An undefined variable generates a warning.
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.if ${UNDEF}
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.endif
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# The :U modifier turns an undefined variable into an ordinary expression.
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.if ${UNDEF:U}
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.endif
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