1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
# $Id: ldorder.mk,v 1.1.1.1 2020/05/24 05:35:53 nia Exp $
#
# @(#) Copyright (c) 2015, Simon J. Gerraty
#
# This file is provided in the hope that it will
# be of use. There is absolutely NO WARRANTY.
# Permission to copy, redistribute or otherwise
# use this file is hereby granted provided that
# the above copyright notice and this notice are
# left intact.
#
# Please send copies of changes and bug-fixes to:
# sjg@crufty.net
#
# Try to compute optimal link order.
# When using only shared libs link order does not much matter,
# but archive libs are a different matter.
# We can construct a graph of .ldorder-lib${LIB*} dependencies
# and associate each with _LDORDER_USE to output the relevant
# ld flags.
# Due to the nature of make, the result will be in the reverse order
# that we want to feed to ld.
# So we need to reverse it before use.
.if !target(_LDORDER_USE)
# does caller want to use ldorder?
# yes for prog, normally no for lib
.if ${.ALLTARGETS:Mldorder} != ""
_ldorder_use:
.endif
# define this if we need a barrier between local and external libs
# see below
LDORDER_EXTERN_BARRIER ?= .ldorder-extern-barrier
.-include <local.ldorder.mk>
# convert /path/to/libfoo.a into _{LIBFOO}
LDORDER_INC_FILTER += S,+,PLUS,g S,.so$$,,g
LDORDER_LIBS_FILTER += O:u
LDORDER_INC ?= ldorder.inc
# for meta mode
REFERENCE_FILE ?= :
_LDORDER_USE: .ldorder-rm .USE .NOTMAIN
@echo depends: ${.ALLSRC:M.ldorder-lib*} > /dev/null
@echo ${LDADD_${.TARGET:T:S,.ldorder-,,}:U${.TARGET:T:S/.ldorder-lib/-l/}} >> .ldorder
@${META_COOKIE_TOUCH}
# we need to truncate our working file
.ldorder-rm: .NOTMAIN
@rm -f .ldorder ldorder-*
@${.ALLSRC:O:u:@f@${REFERENCE_FILE} < $f;@}
@${META_COOKIE_TOUCH}
# make sure this exists
.ldorder: .NOTMAIN
# and finally we need to reverse the order of content
ldorder: .ldorder .NOTMAIN
@{ test ! -s .ldorder || cat -n .ldorder | sort -rn | \
sed '/ldorder-/d;s,^[[:space:]0-9]*,,'; } > ${.TARGET}
# Initially we hook contents of DPLIBS and DPADD into our graph
LDORDER_LIBS ?= ${DPLIBS} ${DPADD:M*/lib*} ${__dpadd_libs}
# we need to remember this
_LDORDER_LIBS := ${LDORDER_LIBS:${LDORDER_LIBS_FILTER:ts:}}
.if empty(_LDORDER_LIBS)
# don't use stale ldorder
LDADD_LDORDER =
.else
# this is how you use it
LDADD_LDORDER ?= `cat ldorder`
.endif
# for debug below
_ldorder = ${RELDIR}.${TARGET_SPEC}
# we make have some libs that exist outside of $SB
# and want to insert a barrier
.if target(${LDORDER_EXTERN_BARRIER})
# eg. in local.ldorder.mk
# ${LDORDER_EXTERN_BARRIER}:
# @test -z "${extern_ldorders}" || \
# echo -Wl,-Bdynamic >> .ldorder
#
# feel free to put more suitable version in local.ldorder.mk if needed
# we do *not* count host libs in extern_ldorders
extern_ldorders ?= ${__dpadd_libs:tA:N/lib*:N/usr/lib*:N${SB}/*:N${SB_OBJROOT:tA}*:T:${LDORDER_LIBS_FILTER:ts:}:R:C/\.so.*//:S,^,.ldorder-,:N.ldorder-}
sb_ldorders ?= ${.ALLTARGETS:M.ldorder-*:N${LDORDER_EXTERN_BARRIER}:N.ldorder-rm:${extern_ldorders:${M_ListToSkip}}:N.ldorder-}
# finally in Makefile after include of *.mk put
# .ldorder ${sb_ldorders}: ${LDORDER_EXTERN_BARRIER}
# ${LDORDER_EXTERN_BARRIER}: ${extern_ldorders}
.endif
.endif # !target(_LDORDER_USE)
.if !empty(LDORDER_LIBS) && target(_ldorder_use)
# canonicalize - these are just tokens anyway
LDORDER_LIBS := ${LDORDER_LIBS:${LDORDER_LIBS_FILTER:ts:}:R:C/\.so.*//}
_ldorders := ${LDORDER_LIBS:T:Mlib*:S,^,.ldorder-,}
.for t in ${_ldorders}
.if !target($t)
$t: _LDORDER_USE
.endif
.endfor
# and this makes it all happen
.ldorder: ${_ldorders}
# this is how we get the dependencies
.if ${.INCLUDEDFROMFILE:M*.${LDORDER_INC}} != ""
_ldorder := .ldorder-${.INCLUDEDFROMFILE:S/.${LDORDER_INC}//}
${_ldorder}: ${_ldorders}
.ldorder-rm: ${.INCLUDEDFROMDIR}/${.INCLUDEDFROMFILE}
.endif
# set DEBUG_LDORDER to pattern[s] that match the dirs of interest
.if ${DEBUG_LDORDER:Uno:@x@${RELDIR:M$x}@} != ""
.info ${_ldorder}: ${_ldorders}
.endif
# now try to find more ...
# each *.${LDORDER_INC} should set LDORDER_LIBS to what it needs
# it can also add to CFLAGS etc.
.for __inc in ${LDORDER_LIBS:S,$,.${LDORDER_INC},}
.if !target(__${__inc}__)
__${__inc}__:
# make sure this is reset
LDORDER_LIBS =
_ldorders =
.-include <${__inc}>
.endif
.endfor
.endif # !empty(LDORDER_LIBS)
.ifdef LIB
# you can make this depend on files (must match *ldorder*)
# to add extra content - like CFLAGS
libLDORDER_INC = lib${LIB}.${LDORDER_INC}
.if !commands(${libLDORDER_INC})
.if target(ldorder-header)
${libLDORDER_INC}: ldorder-header
.endif
${libLDORDER_INC}:
@(cat /dev/null ${.ALLSRC:M*ldorder*}; \
echo 'LDORDER_LIBS= ${_LDORDER_LIBS:T:R:${LDORDER_INC_FILTER:ts:}:tu:C,.*,_{&},:N_{}}'; \
echo; echo '.include <ldorder.mk>' ) | sed 's,_{,$${,g' > ${.TARGET}
.endif
.endif
|
