77 lines
1.2 KiB
Makefile
77 lines
1.2 KiB
Makefile
# $NetBSD: cond-op-and.mk,v 1.6 2021/12/10 19:14:35 rillig Exp $
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#
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# Tests for the && operator in .if conditions.
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.if 0 && 0
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. error
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.endif
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.if 1 && 0
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. error
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.endif
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.if 0 && 1
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. error
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.endif
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.if !(1 && 1)
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. error
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.endif
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# The right-hand side is not evaluated since the left-hand side is already
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# false.
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.if 0 && ${UNDEF}
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.endif
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# When an outer condition makes the inner '&&' condition irrelevant, neither
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# of its operands must be evaluated.
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#
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.if 1 || (${UNDEF} && ${UNDEF})
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.endif
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# Test combinations of outer '||' with inner '&&', to ensure that the operands
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# of the inner '&&' are only evaluated if necessary.
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DEF= defined
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.if 0 || (${DEF} && ${UNDEF})
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.endif
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.if 0 || (!${DEF} && ${UNDEF})
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.endif
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.if 0 || (${UNDEF} && ${UNDEF})
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.endif
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.if 0 || (!${UNDEF} && ${UNDEF})
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.endif
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.if 1 || (${DEF} && ${UNDEF})
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.endif
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.if 1 || (!${DEF} && ${UNDEF})
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.endif
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.if 1 || (${UNDEF} && ${UNDEF})
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.endif
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.if 1 || (!${UNDEF} && ${UNDEF})
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.endif
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# The && operator may be abbreviated as &. This is not widely known though
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# and is also not documented in the manual page.
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.if 0 & 0
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. error
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.endif
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.if 1 & 0
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. error
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.endif
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.if 0 & 1
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. error
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.endif
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.if !(1 & 1)
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. error
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.endif
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# There is no operator &&&.
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.if 0 &&& 0
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. error
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.endif
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all:
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@:;
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