956e45f6fb
Lots of new unit-tests increase code coverage. Lots of refactoring, cleanup and simlpification to reduce code size. Fixes for Bug 223564 and 245807 Updates to dirdeps.mk and meta2deps.py
74 lines
1.4 KiB
Makefile
Executable File
74 lines
1.4 KiB
Makefile
Executable File
# $NetBSD: cond-cmp-numeric-lt.mk,v 1.2 2020/10/24 08:46:08 rillig Exp $
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#
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# Tests for numeric comparisons with the < operator in .if conditions.
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# When both sides are equal, the < operator always yields false.
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.if 1 < 1
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. error
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.endif
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# This comparison yields the same result, whether numeric or character-based.
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.if 1 < 2
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.else
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. error
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.endif
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.if 2 < 1
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. error
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.endif
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# If this comparison were character-based instead of numerical, the
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# 5 would be > 14 since its first digit is greater.
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.if 5 < 14
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.else
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. error
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.endif
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.if 14 < 5
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. error
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.endif
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# Scientific notation is supported, as per strtod.
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.if 2e7 < 1e8
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.else
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. error
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.endif
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.if 1e8 < 2e7
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. error
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.endif
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# Floating pointer numbers can be compared as well.
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# This might be tempting to use for version numbers, but there are a few pitfalls.
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.if 3.141 < 111.222
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.else
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. error
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.endif
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.if 111.222 < 3.141
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. error
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.endif
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# When parsed as a version number, 3.30 is greater than 3.7.
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# Since make parses numbers as plain numbers, that leads to wrong results.
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# Numeric comparisons are not suited for comparing version number.
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.if 3.30 < 3.7
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.else
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. error
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.endif
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.if 3.7 < 3.30
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. error
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.endif
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# As of 2020-08-23, numeric comparison is implemented as parsing both sides
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# as double, and then performing a normal comparison. The range of double is
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# typically 16 or 17 significant digits, therefore these two numbers seem to
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# be equal.
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.if 1.000000000000000001 < 1.000000000000000002
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. error
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.endif
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all:
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@:;
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