1 # $Id: whats.mk,v 1.1 2014/08/30 22:40:47 sjg Exp $
3 # @(#) Copyright (c) 2014, Simon J. Gerraty
5 # This file is provided in the hope that it will
6 # be of use. There is absolutely NO WARRANTY.
7 # Permission to copy, redistribute or otherwise
8 # use this file is hereby granted provided that
9 # the above copyright notice and this notice are
12 # Please send copies of changes and bug-fixes to:
16 .if ${MK_WHATSTRING:Uno} != "no"
18 # it can be useful to embed a what(1) string in binaries
19 # so that the build location can be seen from a core file.
20 .if defined(PROG) && ${.MAKE.MAKEFILES:M*prog.mk} != ""
21 what_thing?= ${PROGNAME:U${PROG}}
22 what_build_thing?= ${PROG}
23 .elif defined(LIB) && ${.MAKE.MAKEFILES:M*lib.mk} != ""
24 # probably only makes sense for shared libs
25 # and the plumbing needed varies depending on *lib.mk
26 what_thing?= lib${LIB}
29 what_build_exts= ${_soe}
30 SOBJS+= ${what_uuid}.${_soe}
32 .elif defined(KMOD) && ${.MAKE.MAKEFILES:M*kmod.mk} != ""
34 what_build_thing?= ${KMOD}.ko
37 .if !empty(what_thing)
38 # a unique name that won't conflict with anything
39 what_uuid = what_${.CURDIR:T:hash}
41 .if !empty(what_build_thing)
42 ${what_build_thing}: ${what_build_exts:@e@${what_uuid}.$e@}
45 CLEANFILES+= ${what_uuid}.c
47 # we do not need to capture this
48 SUPPRESS_DEPEND+= *${what_uuid}.c
51 SB_LOCATION?= ${HOST}:${SB}
52 what_location:= ${.OBJDIR:S,${SB},${SB_LOCATION},}
54 # this works with clang and gcc
55 _what_t= const char __attribute__ ((section(".data")))
56 _what1:= @(\#)${what_thing:tu} built ${%Y%m%d:L:localtime} by ${USER}
57 _what2:= @(\#)${what_location}
60 echo '${_what_t} ${what_uuid}1[] = "${_what1}";' > $@ ${.OODATE:MNO_META_CMP}
61 echo '${_what_t} ${what_uuid}2[] = "${_what2}";' >> $@