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 - 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 				grep -v thread
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$needdraw" = xtrue ]
154 	then
155 		if [ "x$X11" = "x" ]
156 		then
157 			X11=/usr/X11R6
158 		fi
159 		# x86_64 seems to put its 64-bit libraries in lib64.
160 		if [ "${OBJTYPE:-`uname -m`}" = "x86_64" ]
161 		then
162 			libsl="$libsl -L$X11/lib64"
163 		fi
164 		libsl="$libsl -L$X11/lib -lX11"
165 	fi
166 fi
167 if $doautoframework
168 then
169 	ofiles=""
170 	for i
171 	do
172 		case "$i" in
173 		*.[ao])
174 			ofiles="$ofiles $i"
175 			;;
176 		esac
177 	done
178 
179 	# echo "ofiles $ofiles"
180 	autoframeworks=""
181 	if [ "x$ofiles" != "x" ]
182 	then
183 		a=`
184 			nm $ofiles |
185 			grep '__p9l_autoframework_[a-zA-Z0-9+-]*$' |
186 			sed 's/.*__p9l_autoframework_//' |
187 			sort -u
188 		`
189 		for i in $a
190 		do
191 			autoframeworks="$autoframeworks $i"
192 			eval "need$i=true"
193 		done
194 	fi
195 
196 	if $verbose
197 	then
198 		echo "autoframeworks $autoframeworks"
199 	fi
200 
201 	for i in $autoframeworks
202 	do
203 		eval "have$i() { false; }"
204 	done
205 
206 	frameworks=""
207 	for i in $autoframeworks
208 	do	
209 		frameworks="-framework $i $frameworks"
210 	done
211 fi
212 
213 extralibs="-lm"
214 tag="${SYSNAME:-`uname`}-${OBJTYPE:-`uname -m`}"
215 case "$tag" in
216 *FreeBSD*)
217 	ld=gcc
218 	userpath=true
219 	extralibs="$extralibs -lutil"
220 	case "`uname -r`" in
221 	5.2.*)
222 		extralibs="$extralibs -lkse"
223 		;;
224 	[5-9].*)
225 		extralibs="$extralibs -lpthread"
226 		;;
227 	esac
228 	;;
229 *BSD*)
230 	ld=gcc
231 	userpath=true
232 	extralibs="$extralibs -lutil"
233 	;;
234 *Linux*)
235 	ld=gcc
236 	userpath=true
237 	extralibs="$extralibs -lutil"
238 	case "${SYSVERSION:-`uname -r`}" in
239 	2.6.*)
240 		extralibs="$extralibs -lpthread"
241 		;;
242 	esac
243 	;;
244 *Darwin*)
245 	ld=gcc
246 	;;
247 *SunOS*)
248 	ld="${CC9:-cc} -g"
249 	extralibs="$extralibs -lrt -lpthread -lsocket -lnsl"
250 	# Record paths to shared libraries to avoid needing LD_LIBRARY_PATH 
251 	for i in "$libsl $@"
252 	do
253 		case "$i" in
254 		-L*)
255 			s=`echo $i | sed 's/-L/-R/'`
256 			extralibs="$extralibs $s"
257 			;;
258 		esac
259 	done
260 	case "${SYSVERSION:-`uname -r`}" in
261 	5.[67])
262 		echo do not know how to link right thread library on "$tag" 1>&2
263 		;;
264 	5.8)
265 		# Some trickery is needed to force use of
266 		# alternate thread lib from /usr/lib/lwp
267 		# Likely, this only works with sun cc,
268 		# for other compiler/loader we would need other flags.
269 		ld="$ld -i"
270 		extralibs="$extralibs /usr/lib/lwp/libthread.so -R/usr/lib/lwp:/usr/lib"
271 		;;
272 	esac
273 	;;
274 *)
275 	echo do not know how to link on "$tag" 1>&2
276 	exit 1
277 esac
278 
279 case "$userpath" in
280 true)
281 	for i in "$libsl $@"
282 	do
283 		case "$i" in
284 		-L*)
285 			s=`echo $i | sed 's/-L/-Wl,-rpath,/'`
286 			extralibs="$extralibs $s"
287 			;;
288 		esac
289 	done
290 	;;
291 esac
292 
293 if $verbose
294 then
295 	echo $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks
296 fi
297 
298 xtmp=/tmp/9l.$$.$USER.out
299 xxout() {
300 	egrep -v ': In function `' $xtmp
301 	rm -f $xtmp
302 }
303 
304 if $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks >$xtmp 2>&1
305 then
306 	xxout
307 	exit 0
308 else
309 	xxout
310 	rm -f $target
311 	exit 1
312 fi
313