21 lines
814 B
Makefile
21 lines
814 B
Makefile
# $NetBSD: cond-eof.mk,v 1.3 2021/12/10 23:12:44 rillig Exp $
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#
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# Tests for parsing conditions, especially the end of such conditions, which
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# are represented as the token TOK_EOF.
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SIDE_EFFECT= ${:!echo 'side effect' 1>&2!}
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SIDE_EFFECT2= ${:!echo 'side effect 2' 1>&2!}
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# In the following conditions, ${SIDE_EFFECT} is the position of the first
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# parse error. Before cond.c 1.286 from 2021-12-10, it was always fully
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# evaluated, even if it was not necessary to expand the variable expression.
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# These syntax errors are an edge case that does not occur during normal
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# operation. Still, it is easy to avoid evaluating these expressions, just in
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# case they have side effects.
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.if 0 ${SIDE_EFFECT} ${SIDE_EFFECT2}
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.endif
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.if 1 ${SIDE_EFFECT} ${SIDE_EFFECT2}
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.endif
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.if (0) ${SIDE_EFFECT} ${SIDE_EFFECT2}
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.endif
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