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63 lines
1.6 KiB
Makefile
63 lines
1.6 KiB
Makefile
# NAME:
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# target-flags.mk - target specific flags
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#
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# DESCRIPTION:
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# Include this macro file after all others in a makefile and
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# follow it with any target specific flag settings.
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# For each such variable v in TARGET_FLAG_VARS we set:
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#.nf
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#
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# _$v := ${$v}
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# $v = ${${v}_${.TARGET:T}:U${_$v}}
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#.fi
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#
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# This allows one to do things like:
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#.nf
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#
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# TARGET_FLAG_VARS= CFLAGS
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# .include <target-flags.mk>
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# CFLAGS_fu.o = ${_CFLAGS:N-Wall}
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#.fi
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#
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# To turn off -Wall for just the target fu.o
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# Actually CFLAGS is the default value for TARGET_FLAG_VARS.
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#
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# BUGS:
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# One must be careful to avoid creating circular references in
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# variables. The original version of this macro file did
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# elaborate things with CFLAGS. The current, simpler
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# implementation is ultimately more flexible.
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#
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# It is important that target-flags.mk is included after other
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# macro files and that target specific flags that may reference
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# _$v are set after that.
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#
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# Only works with a make(1) that does nested evaluation correctly.
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# RCSid:
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# $Id: target-flags.mk,v 1.9 2014/04/05 22:56:54 sjg Exp $
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#
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# @(#) Copyright (c) 1998-2002, Simon J. Gerraty
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#
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# This file is provided in the hope that it will
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# be of use. There is absolutely NO WARRANTY.
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# Permission to copy, redistribute or otherwise
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# use this file is hereby granted provided that
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# the above copyright notice and this notice are
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# left intact.
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#
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# Please send copies of changes and bug-fixes to:
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# sjg@crufty.net
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#
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TARGET_FLAG_VARS?= CFLAGS
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.for v in ${TARGET_FLAG_VARS}
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.ifndef _$v
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_$v := ${$v}
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$v = ${${v}_${.TARGET:T}:U${_$v}}
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.endif
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.endfor
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