e2eeea75eb
o allow env var MAKE_OBJDIR_CHECK_WRITABLE=no to skip writable checks in InitObjdir. Explicit .OBJDIR target always allows read-only directory. o More code cleanup and refactoring. o More unit tests MFC after: 1 week
38 lines
1.1 KiB
Makefile
38 lines
1.1 KiB
Makefile
# $NetBSD: varmod-exclam-shell.mk,v 1.4 2020/11/03 18:42:33 rillig Exp $
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#
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# Tests for the :!cmd! variable modifier, which evaluates the modifier
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# argument, independent of the value or the name of the original variable.
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.if ${:!echo hello | tr 'l' 'l'!} != "hello"
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. error
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.endif
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# The output is truncated at the first null byte.
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# Cmd_Exec returns only a string pointer without length information.
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# Truncating the output is not necessarily intended but may also be a side
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# effect from the implementation. Having null bytes in the output of a
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# shell command is so unusual that it doesn't matter in practice.
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.if ${:!echo hello | tr 'l' '\0'!} != "he"
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. error
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.endif
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# The newline at the end of the output is stripped.
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.if ${:!echo!} != ""
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. error
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.endif
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# Only the final newline of the output is stripped. All other newlines are
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# converted to spaces.
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.if ${:!echo;echo!} != " "
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. error
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.endif
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# Each newline in the output is converted to a space, except for the newline
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# at the end of the output, which is stripped.
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.if ${:!echo;echo;echo;echo!} != " "
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. error
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.endif
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all:
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@:;
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