1# $Id: whats.mk,v 1.10 2020/08/19 17:51:53 sjg Exp $ 2# 3# @(#) Copyright (c) 2014-2020, Simon J. Gerraty 4# 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 10# left intact. 11# 12# Please send copies of changes and bug-fixes to: 13# sjg@crufty.net 14# 15 16.if ${MK_WHATSTRING:Uno} == "yes" 17# it can be useful to embed a what(1) string in binaries 18# so that the build location can be seen from a core file. 19.if defined(KMOD) 20what_thing ?= ${KMOD} 21.elif defined(LIB) 22what_thing ?= lib${LIB} 23.elif defined(PROG) 24what_thing ?= ${PROG} 25SRCS ?= ${PROG}.c 26.elif defined(SHLIB) 27what_thing ?= lib${SHLIB} 28.endif 29 30.if !empty(what_thing) 31# a unique name that won't conflict with anything 32what_uuid = what_${what_thing}_${.CURDIR:T:hash} 33what_var = what_${.CURDIR:T:hash} 34 35SRCS += ${what_uuid}.c 36CLEANFILES += ${what_uuid}.c 37# we do not need to capture this 38SUPPRESS_DEPEND += *${what_uuid}.c 39 40SB ?= ${SRCTOP:H} 41SB_LOCATION ?= ${HOST}:${SB} 42# make customization easy 43WHAT_LOCATION ?= ${.OBJDIR:S,${SB},${SB_LOCATION},} 44WHAT_1 ?= ${what_thing:tu} built ${%Y%m%d:L:localtime} by ${USER} 45WHAT_2 ?= ${what_location} 46WHAT_LINE_IDS ?= 1 2 47WHAT_NOCMP_LINE_IDS ?= 1 48# you can add other WHAT_* just be sure to set WHAT_LINE_IDS 49# and WHAT_NOCMP_LINE_IDS accordingly 50 51# this works with clang and gcc 52what_t = const char __attribute__ ((section(".data"))) 53what_location := ${WHAT_LOCATION} 54 55# this script is done in multiple lines so we can 56# use the token ${.OODATE:MNO_META_CMP} 57# to prevent the variable parts making this constantly out-of-date 58${what_uuid}.c: 59 echo 'extern const char ${WHAT_LINE_IDS:@i@${what_var}_$i[]@:ts,};' > $@ 60.for i in ${WHAT_LINE_IDS} 61.if ${WHAT_NOCMP_LINE_IDS:M$i} != "" 62 echo '${what_t} ${what_var}_$i[] = "@(#)${WHAT_$i}";' >> $@ ${.OODATE:MNO_META_CMP} 63.else 64 echo '${what_t} ${what_var}_$i[] = "@(#)${WHAT_$i}";' >> $@ 65.endif 66.endfor 67 68.endif 69.endif 70