65 lines
1.9 KiB
Makefile
65 lines
1.9 KiB
Makefile
# $Id: whats.mk,v 1.3 2017/10/19 06:09:14 sjg Exp $
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#
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# @(#) Copyright (c) 2014, 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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.if ${MK_WHATSTRING:Uno} != "no"
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what_build_exts?= o
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# it can be useful to embed a what(1) string in binaries
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# so that the build location can be seen from a core file.
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.if defined(PROG) && ${.MAKE.MAKEFILES:M*prog.mk} != ""
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what_thing?= ${PROGNAME:U${PROG}}
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what_build_thing?= ${PROG}
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.elif defined(LIB) && ${.MAKE.MAKEFILES:M*lib.mk} != ""
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# probably only makes sense for shared libs
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# and the plumbing needed varies depending on *lib.mk
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what_thing?= lib${LIB}
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.if !empty(SOBJS)
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_soe:= ${SOBJS:E:[1]}
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what_build_exts= ${_soe}
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SOBJS+= ${what_uuid}.${_soe}
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.endif
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.elif defined(KMOD) && ${.MAKE.MAKEFILES:M*kmod.mk} != ""
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what_thing?= ${KMOD}
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what_build_thing?= ${KMOD}.ko
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.endif
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.if !empty(what_thing)
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# a unique name that won't conflict with anything
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what_uuid = what_${what_thing}_${.CURDIR:T:hash}
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what_var = what_${.CURDIR:T:hash}
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.if !empty(what_build_thing)
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${what_build_thing}: ${what_build_exts:@e@${what_uuid}.$e@}
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.endif
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OBJS+= ${what_uuid}.o
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CLEANFILES+= ${what_uuid}.c
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# we do not need to capture this
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SUPPRESS_DEPEND+= *${what_uuid}.c
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SB?= ${SRCTOP:H}
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SB_LOCATION?= ${HOST}:${SB}
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what_location:= ${.OBJDIR:S,${SB},${SB_LOCATION},}
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# this works with clang and gcc
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_what_t= const char __attribute__ ((section(".data")))
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_what1:= @(\#)${what_thing:tu} built ${%Y%m%d:L:localtime} by ${USER}
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_what2:= @(\#)${what_location}
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${what_uuid}.c:
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echo '${_what_t} ${what_var}1[] = "${_what1}";' > $@ ${.OODATE:MNO_META_CMP}
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echo '${_what_t} ${what_var}2[] = "${_what2}";' >> $@
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.endif
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.endif
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