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1b65f0bd2b
o allow env var MAKE_OBJDIR_CHECK_WRITABLE=no to skip writable checks in InitObjdir. Explicit .OBJDIR target always allows read-only directory. o Fix building and unit-tests on non-BSD. o More code cleanup and refactoring. o More unit tests
93 lines
2.8 KiB
Makefile
93 lines
2.8 KiB
Makefile
# $NetBSD: modmisc.mk,v 1.51 2020/11/15 20:20:58 rillig Exp $
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#
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# miscellaneous modifier tests
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# do not put any dirs in this list which exist on some
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# but not all target systems - an exists() check is below.
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path= :/bin:/tmp::/:.:/no/such/dir:.
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# strip cwd from path.
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MOD_NODOT= S/:/ /g:N.:ts:
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# and decorate, note that $'s need to be doubled. Also note that
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# the modifier_variable can be used with other modifiers.
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MOD_NODOTX= S/:/ /g:N.:@d@'$$d'@
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# another mod - pretend it is more interesting
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MOD_HOMES= S,/home/,/homes/,
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MOD_OPT= @d@$${exists($$d):?$$d:$${d:S,/usr,/opt,}}@
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MOD_SEP= S,:, ,g
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all: modvar modvarloop modsysv emptyvar undefvar
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all: mod-quote
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all: mod-break-many-words
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# See also sysv.mk.
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modsysv:
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@echo "The answer is ${libfoo.a:L:libfoo.a=42}"
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# Demonstrates modifiers that are given indirectly from a variable.
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modvar:
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@echo "path='${path}'"
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@echo "path='${path:${MOD_NODOT}}'"
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@echo "path='${path:S,home,homes,:${MOD_NODOT}}'"
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@echo "path=${path:${MOD_NODOTX}:ts:}"
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@echo "path=${path:${MOD_HOMES}:${MOD_NODOTX}:ts:}"
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.for d in ${path:${MOD_SEP}:N.} /usr/xbin
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path_$d?= ${d:${MOD_OPT}:${MOD_HOMES}}/
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paths+= ${d:${MOD_OPT}:${MOD_HOMES}}
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.endfor
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modvarloop:
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@echo "path_/usr/xbin=${path_/usr/xbin}"
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@echo "paths=${paths}"
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@echo "PATHS=${paths:tu}"
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# When a modifier is applied to the "" variable, the result is discarded.
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emptyvar:
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@echo S:${:S,^$,empty,}
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@echo C:${:C,^$,empty,}
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@echo @:${:@var@${var}@}
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# The :U modifier turns even the "" variable into something that has a value.
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# The value of the resulting expression is empty, but is still considered to
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# contain a single empty word. This word can be accessed by the :S and :C
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# modifiers, but not by the :@ modifier since it explicitly skips empty words.
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undefvar:
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@echo S:${:U:S,^$,empty,}
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@echo C:${:U:C,^$,empty,}
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@echo @:${:U:@var@empty@}
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mod-quote:
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@echo $@: new${.newline:Q}${.newline:Q}line
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# Cover the bmake_realloc in Str_Words.
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mod-break-many-words:
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@echo $@: ${UNDEF:U:range=500:[#]}
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# To apply a modifier indirectly via another variable, the whole
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# modifier must be put into a single variable expression.
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.if ${value:L:${:US}${:U,value,replacement,}} != "S,value,replacement,}"
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. warning unexpected
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.endif
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# Adding another level of indirection (the 2 nested :U expressions) helps.
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.if ${value:L:${:U${:US}${:U,value,replacement,}}} != "replacement"
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. warning unexpected
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.endif
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# Multiple indirect modifiers can be applied one after another as long as
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# they are separated with colons.
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.if ${value:L:${:US,a,A,}:${:US,e,E,}} != "vAluE"
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. warning unexpected
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.endif
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# An indirect variable that evaluates to the empty string is allowed though.
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# This makes it possible to define conditional modifiers, like this:
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#
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# M.little-endian= S,1234,4321,
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# M.big-endian= # none
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.if ${value:L:${:Dempty}S,a,A,} != "vAlue"
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. warning unexpected
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.endif
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