1# SPDX-License-Identifier: BSD-2-Clause 2# 3# $Id: whats.mk,v 1.12 2024/02/17 17:26:57 sjg Exp $ 4# 5# @(#) Copyright (c) 2014-2020, Simon J. Gerraty 6# 7# This file is provided in the hope that it will 8# be of use. There is absolutely NO WARRANTY. 9# Permission to copy, redistribute or otherwise 10# use this file is hereby granted provided that 11# the above copyright notice and this notice are 12# left intact. 13# 14# Please send copies of changes and bug-fixes to: 15# sjg@crufty.net 16# 17 18.if ${MK_WHATSTRING:Uno} == "yes" 19# it can be useful to embed a what(1) string in binaries 20# so that the build location can be seen from a core file. 21.if defined(KMOD) 22what_thing ?= ${KMOD} 23.elif defined(LIB) 24what_thing ?= lib${LIB} 25.elif defined(PROG) 26what_thing ?= ${PROG} 27SRCS ?= ${PROG}.c 28.elif defined(SHLIB) 29what_thing ?= lib${SHLIB} 30.endif 31 32.if !empty(what_thing) 33# a unique name that won't conflict with anything 34what_uuid = what_${what_thing}_${.CURDIR:T:hash} 35what_var = what_${.CURDIR:T:hash} 36 37SRCS += ${what_uuid}.c 38CLEANFILES += ${what_uuid}.c 39# we do not need to capture this 40SUPPRESS_DEPEND += *${what_uuid}.c 41 42SB ?= ${SRCTOP:H} 43SB_LOCATION ?= ${HOST}:${SB} 44# make customization easy 45WHAT_LOCATION ?= ${.OBJDIR:S,${SB},${SB_LOCATION},} 46WHAT_1 ?= ${what_thing:tu} built ${%Y%m%d:L:localtime} by ${USER} 47WHAT_2 ?= ${what_location} 48WHAT_LINE_IDS ?= 1 2 49WHAT_NOCMP_LINE_IDS ?= 1 50# you can add other WHAT_* just be sure to set WHAT_LINE_IDS 51# and WHAT_NOCMP_LINE_IDS accordingly 52 53# this works with clang and gcc 54what_t = const char __attribute__ ((section(".data"))) 55what_location := ${WHAT_LOCATION} 56 57# this script is done in multiple lines so we can 58# use the token ${.OODATE:MNO_META_CMP} 59# to prevent the variable parts making this constantly out-of-date 60${what_uuid}.c: .NOTMAIN 61 echo 'extern const char ${WHAT_LINE_IDS:@i@${what_var}_$i[]@:ts,};' > $@ 62.for i in ${WHAT_LINE_IDS} 63.if ${WHAT_NOCMP_LINE_IDS:M$i} != "" 64 echo '${what_t} ${what_var}_$i[] = "@(#)${WHAT_$i}";' >> $@ ${.OODATE:MNO_META_CMP} 65.else 66 echo '${what_t} ${what_var}_$i[] = "@(#)${WHAT_$i}";' >> $@ 67.endif 68.endfor 69 70.endif 71.endif 72