1 #!/bin/sh
2 
3 test -f $PLAN9/config && . $PLAN9/config
4 libsl=""
5 frameworks=""
6 doautolib=true
7 doautoframework=true
8 verbose=false
9 
10 if [ "x$1" = "x-l" ]
11 then
12 	shift
13 	doautolib=false
14 	doautoframework=false
15 elif [ "x$1" = "x-v" ]
16 then
17 	shift
18 	verbose=true
19 fi
20 
21 target=a.out
22 if [ "x$1" = "x-o" ]
23 then
24 	target=$2
25 fi
26 
27 if $doautolib
28 then
29 	ofiles=""
30 	for i
31 	do
32 		case "$i" in
33 		*.[ao])
34 			ofiles="$ofiles $i"
35 			;;
36 		esac
37 	done
38 	
39 	# echo "ofiles $ofiles"
40 	autolibs=""
41 	if [ "x$ofiles" != "x" ]
42 	then
43 		a=`
44 			nm $ofiles |
45 			grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
46 			sed 's/.*__p9l_autolib_//' |
47 			sort -u
48 		`
49 		for i in $a
50 		do
51 			autolibs="$autolibs $i"
52 			eval "need$i=true"
53 		done
54 	fi
55 
56 	# fetch dependencies out of libraries
57 	workq="$autolibs"
58 	while [ "x$workq" != "x" ]
59 	do
60 		w="$workq"
61 		workq=""
62 		for i in $w
63 		do
64 			# can't trust the libraries about using
65 			# libthread or libdraw - we might not be linking with
66 			# those object files.
67 			a=`
68 				nm $PLAN9/lib/lib$i.a 2>/dev/null |
69 				grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
70 				sed 's/.*__p9l_autolib_//' |
71 				sort -u |
72 				egrep -v 'thread|draw'
73 			`
74 			okayfn="true"
75 			for j in $a
76 			do
77 				if eval "[ x\$need$j = x ]"
78 				then
79 					autolibs="$autolibs $j"
80 					workq="$workq $j"
81 					eval "need$j=true"
82 				fi
83 				if [ $j != $i ]
84 				then
85 					okayfn="$okayfn && have$j"
86 				fi
87 			done
88 			# echo "can$i: $okayfn"
89 			eval "can$i() { $okayfn; }"
90 		done
91 	done
92 	if $verbose
93 	then
94 		echo "autolibs $autolibs"
95 	fi
96 
97 	for i in $autolibs
98 	do
99 		eval "have$i() { false; }"
100 	done
101 	havethread() { false; }
102 	havesec() { false; }
103 
104 	# now find correct order
105 	libsl=""
106 	while [ "x$autolibs" != x ]
107 	do
108 		stillneed=""
109 		didnothing=true
110 		for i in $autolibs
111 		do
112 			if eval "can$i"
113 			then
114 				libsl="-l$i $libsl"
115 				eval "have$i() { true; }"
116 				didnothing=false
117 			else
118 				stillneed="$stillneed $i"
119 			fi
120 		done
121 		# break cycle by setting the last library on the list
122 		# to have no dependencies
123 		if $didnothing
124 		then
125 			j="xxx"
126 			for i in $autolibs
127 			do
128 				j=$i
129 			done
130 			echo "dependency cycle: $autolibs; breaking with $j"
131 			eval "can$j() { true; }"
132 		fi
133 		autolibs="$stillneed"
134 	done
135 	if $verbose
136 	then
137 		echo "liborder $libsl"
138 	fi
139 	libsl="$libsl -l9"
140 
141 	# cycle: lib9 expects p9main, which is defined in libthread.  oops.
142 	if havethread
143 	then
144 		libsl="$libsl -lthread -l9"
145 	fi
146 
147 	# cycle: lib9 netcrypt uses libsec
148 	if havesec
149 	then
150 		libsl="$libsl -lsec -l9"
151 	fi
152 
153 	if [ "x$needndb" = xtrue -a -f /usr/lib/libresolv.a ]
154 	then
155 		libsl="$libsl -lresolv"
156 	fi
157 
158 	if [ "x$needdraw" = xtrue -a "x$WSYSTYPE" != xnowsys ]
159 	then
160 		if [ "x$X11" = "x" ]
161 		then
162 			X11=/usr/X11R6
163 		fi
164 		# x86_64 seems to put its 64-bit libraries in lib64.
165 		if [ "${OBJTYPE:-`uname -m`}" = "x86_64" ]
166 		then
167 			libsl="$libsl -L$X11/lib64"
168 		fi
169 		libsl="$libsl -L$X11/lib -lX11"
170 	fi
171 fi
172 if $doautoframework
173 then
174 	ofiles=""
175 	for i
176 	do
177 		case "$i" in
178 		*.[ao])
179 			ofiles="$ofiles $i"
180 			;;
181 		esac
182 	done
183 
184 	# echo "ofiles $ofiles"
185 	autoframeworks=""
186 	if [ "x$ofiles" != "x" ]
187 	then
188 		a=`
189 			nm $ofiles |
190 			grep '__p9l_autoframework_[a-zA-Z0-9+-]*$' |
191 			sed 's/.*__p9l_autoframework_//' |
192 			sort -u
193 		`
194 		for i in $a
195 		do
196 			autoframeworks="$autoframeworks $i"
197 			eval "need$i=true"
198 		done
199 	fi
200 
201 	if $verbose
202 	then
203 		echo "autoframeworks $autoframeworks"
204 	fi
205 
206 	for i in $autoframeworks
207 	do
208 		eval "have$i() { false; }"
209 	done
210 
211 	frameworks=""
212 	for i in $autoframeworks
213 	do	
214 		frameworks="-framework $i $frameworks"
215 	done
216 fi
217 
218 extralibs="-lm"
219 tag="${SYSNAME:-`uname`}-${OBJTYPE:-`uname -m`}"
220 case "$tag" in
221 *FreeBSD*)
222 	ld=gcc
223 	userpath=true
224 	extralibs="$extralibs -lutil"
225 	case "`uname -r`" in
226 	5.2.*)
227 		extralibs="$extralibs -lkse"
228 		;;
229 	[5-9].*)
230 		extralibs="$extralibs -lpthread"
231 		;;
232 	esac
233 	;;
234 *BSD*)
235 	ld=gcc
236 	userpath=true
237 	extralibs="$extralibs -lutil"
238 	;;
239 *Linux*)
240 	ld=gcc
241 	userpath=true
242 	extralibs="$extralibs -lutil"
243 	case "${SYSVERSION:-`uname -r`}" in
244 	2.6.*)
245 		extralibs="$extralibs -lpthread"
246 		;;
247 	esac
248 	;;
249 *Darwin*)
250 	ld=gcc
251 	;;
252 *SunOS*)
253 	ld="${CC9:-cc} -g"
254 	extralibs="$extralibs -lrt -lpthread -lsocket -lnsl"
255 	# Record paths to shared libraries to avoid needing LD_LIBRARY_PATH 
256 	for i in "$libsl $@"
257 	do
258 		case "$i" in
259 		-L*)
260 			s=`echo $i | sed 's/-L/-R/'`
261 			extralibs="$extralibs $s"
262 			;;
263 		esac
264 	done
265 	case "${SYSVERSION:-`uname -r`}" in
266 	5.[67])
267 		echo do not know how to link right thread library on "$tag" 1>&2
268 		;;
269 	5.8)
270 		# Some trickery is needed to force use of
271 		# alternate thread lib from /usr/lib/lwp
272 		# Likely, this only works with sun cc,
273 		# for other compiler/loader we would need other flags.
274 		ld="$ld -i"
275 		extralibs="$extralibs /usr/lib/lwp/libthread.so -R/usr/lib/lwp:/usr/lib"
276 		;;
277 	esac
278 	;;
279 *)
280 	echo do not know how to link on "$tag" 1>&2
281 	exit 1
282 esac
283 
284 case "$userpath" in
285 true)
286 	for i in "$libsl $@"
287 	do
288 		case "$i" in
289 		-L*)
290 			s=`echo $i | sed 's/-L/-Wl,-rpath,/'`
291 			extralibs="$extralibs $s"
292 			;;
293 		esac
294 	done
295 	;;
296 esac
297 
298 if $verbose
299 then
300 	echo $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks
301 fi
302 
303 xtmp=/tmp/9l.$$.$USER.out
304 xxout() {
305 	sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . | 
306 	egrep -v 'is almost always misused' 
307 	rm -f $xtmp
308 }
309 
310 if $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks >$xtmp 2>&1
311 then
312 	xxout
313 	exit 0
314 else
315 	xxout
316 	rm -f $target
317 	exit 1
318 fi
319