sys/conf: remove useless dollars from Makefile.kern.inc
When parsing a variable modifier such as :C or :S, all '$' but the very last are silently swallowed. See usr.bin/make/unit-tests/varmod-subst.mk for details. Since August 2020, make has a strict lint mode that is activated by passing it the option -dL. In that mode, these redundant '$' are not accepted anymore.
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@ -1,4 +1,4 @@
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# $NetBSD: Makefile.kern.inc,v 1.276 2020/09/06 07:20:29 mrg Exp $
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# $NetBSD: Makefile.kern.inc,v 1.277 2021/01/31 23:17:21 rillig Exp $
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#
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# This file contains common `MI' targets and definitions and it is included
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# at the bottom of each `MD' ${MACHINE}/conf/Makefile.${MACHINE}.
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@ -282,7 +282,7 @@ SYSTEM_LD_TAIL_STAGE2+= ${SYSTEM_LD_TAIL_EXTRA}
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# Generate list of *.o files to pass to ${LD}, preserving order.
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# x/y/z/a.[csS] -> a.[csS]
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# a.[csS] -> a.o
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OBJS= ${ALLFILES:C|^.*/([^/]*\.[csS])$$|\1|:C|^(.*)\.[csS]$$|\1.o|}
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OBJS= ${ALLFILES:C|^.*/([^/]*\.[csS])$|\1|:C|^(.*)\.[csS]$|\1.o|}
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CFILES= ${ALLFILES:M*.c}
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SFILES= ${ALLFILES:M*.[sS]}
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@ -297,7 +297,7 @@ SSRCS= ${_MD_SFILES} ${_SFILES}
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SRCS= ${CSRCS} ${SSRCS}
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.else # ___USE_SUFFIX_RULES___
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OBJS= ${ALLFILES:C|\.[csS]$$|.o|}
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OBJS= ${ALLFILES:C|\.[csS]$|.o|}
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SRCS= ${ALLFILES:M*.[csS]}
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.endif # ___USE_SUFFIX_RULES___
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