1 #!/bin/sh
2 
3 test -f $PLAN9/config && . $PLAN9/config
4 libsl=""
5 frameworks=""
6 doautolib=true
7 doautoframework=true
8 verbose=false
9 
10 nmflags=""
11 extralibs="-lm"
12 tag="${SYSNAME:-`uname`}-${OBJTYPE:-`uname -m`}"
13 case "$tag" in
14 *FreeBSD*)
15 	ld=gcc
16 	userpath=true
17 	extralibs="$extralibs -lutil"
18 	case "`uname -r`" in
19 	5.2.*)
20 		extralibs="$extralibs -lkse"
21 		;;
22 	[5-9].*)
23 		extralibs="$extralibs -lpthread"
24 		;;
25 	esac
26 	;;
27 *BSD*)
28 	ld=gcc
29 	userpath=true
30 	extralibs="$extralibs -lutil"
31 	;;
32 *OSF1*)
33 	ld=cc
34 	userpath=true
35 	extralibs="$extralibs -lutil"
36 	nmflags="-B"
37 	;;
38 *Linux*)
39 	ld=gcc
40 	userpath=true
41 	extralibs="$extralibs -lutil"
42 	case "${SYSVERSION:-`uname -r`}" in
43 	2.6.*)
44 		extralibs="$extralibs -lpthread"
45 		;;
46 	esac
47 	;;
48 *Darwin*)
49 	ld=gcc
50 	;;
51 *SunOS*)
52 	ld="${CC9:-cc} -g"
53 	extralibs="$extralibs -lrt -lpthread -lsocket -lnsl"
54 	# Record paths to shared libraries to avoid needing LD_LIBRARY_PATH 
55 	for i in "$libsl $@"
56 	do
57 		case "$i" in
58 		-L*)
59 			s=`echo $i | sed 's/-L/-R/'`
60 			extralibs="$extralibs $s"
61 			;;
62 		esac
63 	done
64 	case "${SYSVERSION:-`uname -r`}" in
65 	5.[67])
66 		echo do not know how to link right thread library on "$tag" 1>&2
67 		;;
68 	5.8)
69 		# Some trickery is needed to force use of
70 		# alternate thread lib from /usr/lib/lwp
71 		# Likely, this only works with sun cc,
72 		# for other compiler/loader we would need other flags.
73 		ld="$ld -i"
74 		extralibs="$extralibs /usr/lib/lwp/libthread.so -R/usr/lib/lwp:/usr/lib"
75 		;;
76 	esac
77 	;;
78 *AIX*)
79 	ld=gcc
80 	nmflags="-B"
81 	;;
82 *)
83 	echo do not know how to link on "$tag" 1>&2
84 	exit 1
85 esac
86 
87 if [ "x$1" = "x-l" ]
88 then
89 	shift
90 	doautolib=false
91 	doautoframework=false
92 elif [ "x$1" = "x-v" ]
93 then
94 	shift
95 	verbose=true
96 fi
97 
98 target=a.out
99 if [ "x$1" = "x-o" ]
100 then
101 	target=$2
102 fi
103 
104 if $doautolib
105 then
106 	ofiles=""
107 	lpaths="$PLAN9/lib"
108 	for i
109 	do
110 		case "$i" in
111 		*.[ao])
112 			ofiles="$ofiles $i"
113 			;;
114 		-L*)
115 			l=`echo $i | sed 's/-L//'`
116 			lpaths="$lpaths $l"
117 		esac
118 	done
119 	
120 	if $verbose
121 	then
122 		echo "ofiles $ofiles"
123 		echo "lpaths $lpaths"
124 	fi
125 
126 	autolibs=""
127 	if [ "x$ofiles" != "x" ]
128 	then
129 		a=`
130 			nm $nmflags $ofiles |
131 			grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
132 			sed 's/.*__p9l_autolib_//' |
133 			sort -u
134 		`
135 		for i in $a
136 		do
137 			autolibs="$autolibs $i"
138 			eval "need$i=true"
139 		done
140 	fi
141 	if $verbose
142 	then
143 		echo "autolibs1 $autolibs"
144 	fi
145 
146 	# fetch dependencies out of libraries
147 	workq="$autolibs"
148 	while [ "x$workq" != "x" ]
149 	do
150 		w="$workq"
151 		workq=""
152 		for i in $w
153 		do
154 			# can't trust the libraries about using
155 			# libthread or libdraw - we might not be linking with
156 			# those object files.
157 			a=""
158 			for lpath in $lpaths
159 			do
160 				b=`
161 					nm $lpath/lib$i.a 2>/dev/null |
162 					grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
163 					sed 's/.*__p9l_autolib_//' |
164 					sort -u |
165 					egrep -v '^(thread|draw)$'
166 				`
167 				a="$a $b"
168 			done
169 			# fix up libraries that really need draw
170 			if [ "x$i" = "xmemdraw" -o "x$i" = "xmemlayer" -o "x$i" = "xframe" ]
171 			then
172 				a="$a draw"
173 			fi
174 			okayfn="true"
175 			for j in $a
176 			do
177 				if eval "[ x\$need$j = x ]"
178 				then
179 					autolibs="$autolibs $j"
180 					workq="$workq $j"
181 					eval "need$j=true"
182 				fi
183 				if [ $j != $i ]
184 				then
185 					okayfn="$okayfn && have$j"
186 				fi
187 			done
188 			if $verbose
189 			then
190 				echo "can$i: $okayfn"
191 			fi
192 			eval "can$i() { $okayfn; }"
193 		done
194 	done
195 	if $verbose
196 	then
197 		echo "autolibs $autolibs"
198 	fi
199 
200 	for i in $autolibs
201 	do
202 		eval "have$i() { false; }"
203 	done
204 	havethread() { false; }
205 	havesec() { false; }
206 	canmemlayer() { havedraw; }
207 
208 	# now find correct order
209 	libsl=""
210 	while [ "x$autolibs" != x ]
211 	do
212 		stillneed=""
213 		didnothing=true
214 		for i in $autolibs
215 		do
216 			if eval "can$i"
217 			then
218 				libsl="-l$i $libsl"
219 				eval "have$i() { true; }"
220 				didnothing=false
221 			else
222 				stillneed="$stillneed $i"
223 			fi
224 		done
225 		# break cycle by setting the last library on the list
226 		# to have no dependencies
227 		if $didnothing
228 		then
229 			j="xxx"
230 			for i in $autolibs
231 			do
232 				j=$i
233 			done
234 			echo "dependency cycle: $autolibs; breaking with $j"
235 			eval "can$j() { true; }"
236 		fi
237 		autolibs="$stillneed"
238 	done
239 	if $verbose
240 	then
241 		echo "liborder $libsl"
242 	fi
243 	libsl="$libsl -l9"
244 
245 	# cycle: lib9 expects p9main, which is defined in libthread.  oops.
246 	if havethread
247 	then
248 		libsl="$libsl -lthread -l9"
249 	fi
250 
251 	# cycle: lib9 netcrypt uses libsec
252 	if havesec
253 	then
254 		libsl="$libsl -lsec -l9"
255 	fi
256 
257 	if [ "x$needndb" = xtrue -a '(' -f /usr/lib/libresolv.a -o -f /usr/lib/libresolv.dylib ')' ]
258 	then
259 		libsl="$libsl -lresolv"
260 	fi
261 
262 	if [ "x$needX11" = xtrue -a "x$WSYSTYPE" != xnowsys ]
263 	then
264 		if [ "x$X11" = "x" ]
265 		then
266 			X11=/usr/X11R6
267 		fi
268 		# x86_64 seems to put its 64-bit libraries in lib64.
269 		if [ "${OBJTYPE:-`uname -m`}" = "x86_64" ]
270 		then
271 			libsl="$libsl -L$X11/lib64"
272 		fi
273 		libsl="$libsl -L$X11/lib -lX11"
274 	fi
275 fi
276 if $doautoframework
277 then
278 	ofiles=""
279 	for i
280 	do
281 		case "$i" in
282 		*.[ao])
283 			ofiles="$ofiles $i"
284 			;;
285 		esac
286 	done
287 
288 	# echo "ofiles $ofiles"
289 	autoframeworks=""
290 	if [ "x$ofiles" != "x" ]
291 	then
292 		a=`
293 			nm $ofiles |
294 			grep '__p9l_autoframework_[a-zA-Z0-9+-]*$' |
295 			sed 's/.*__p9l_autoframework_//' |
296 			sort -u
297 		`
298 		for i in $a
299 		do
300 			autoframeworks="$autoframeworks $i"
301 			eval "need$i=true"
302 		done
303 	fi
304 
305 	if $verbose
306 	then
307 		echo "autoframeworks $autoframeworks"
308 	fi
309 
310 	for i in $autoframeworks
311 	do
312 		eval "have$i() { false; }"
313 	done
314 
315 	frameworks=""
316 	for i in $autoframeworks
317 	do	
318 		frameworks="-framework $i $frameworks"
319 	done
320 fi
321 
322 case "$userpath" in
323 true)
324 	for i in "$libsl $@"
325 	do
326 		case "$i" in
327 		-L*)
328 			s=`echo $i | sed 's/-L/-Wl,-rpath,/'`
329 			extralibs="$extralibs $s"
330 			;;
331 		esac
332 	done
333 	;;
334 esac
335 
336 if $verbose
337 then
338 	echo $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks
339 fi
340 
341 xtmp=/tmp/9l.$$.$USER.out
342 xxout() {
343 	sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . | 
344 	egrep -v 'is (often|almost always) misused|is dangerous, better use' 
345 	rm -f $xtmp
346 }
347 
348 if $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks >$xtmp 2>&1
349 then
350 	xxout
351 	exit 0
352 else
353 	xxout
354 	rm -f $target
355 	exit 1
356 fi
357