1 #!/bin/sh
2 
3 [ "$1" = "" ] && exit 1
4 
5 test -f $PLAN9/config && . $PLAN9/config
6 libsl=""
7 frameworks=""
8 doautolib=true
9 doautoframework=true
10 verbose=false
11 
12 nmflags=""
13 extralibs="-lm"
14 tag="${SYSNAME:-`uname`}"
15 case "$tag" in
16 *DragonFly*|*BSD*)
17 	ld="${CC9:-gcc} $CC9FLAGS"
18 	userpath=true
19 	extralibs="$extralibs -lutil"
20 	;;
21 *OSF1*)
22 	ld="${CC9:-cc} $CC9FLAGS"
23 	userpath=true
24 	extralibs="$extralibs -lutil"
25 	nmflags="-B"
26 	;;
27 *Linux*)
28 	ld="${CC9:-gcc} $CC9FLAGS"
29 	userpath=true
30 	extralibs="$extralibs -lutil -lresolv -lpthread"
31 	;;
32 *Darwin*)
33 	ld="${CC9:-gcc} -m64 $CC9FLAGS"
34 	;;
35 *SunOS*)
36 	ld="${CC9:-cc} -g $CC9FLAGS"
37 	extralibs="$extralibs -lrt -lpthread -lsocket -lnsl"
38 	# Record paths to shared libraries to avoid needing LD_LIBRARY_PATH
39 	for i in "$libsl $@"
40 	do
41 		case "$i" in
42 		-L*)
43 			s=`echo $i | sed 's/-L/-R/'`
44 			extralibs="$extralibs $s"
45 			;;
46 		esac
47 	done
48 	case "${SYSVERSION:-`uname -r`}" in
49 	5.[67])
50 		echo do not know how to link right thread library on "$tag" 1>&2
51 		;;
52 	5.8)
53 		# Some trickery is needed to force use of
54 		# alternate thread lib from /usr/lib/lwp
55 		# Likely, this only works with sun cc,
56 		# for other compiler/loader we would need other flags.
57 		ld="$ld -i"
58 		extralibs="$extralibs /usr/lib/lwp/libthread.so -R/usr/lib/lwp:/usr/lib"
59 		;;
60 	esac
61 	;;
62 *AIX*)
63 	ld="${CC9:-xlc_r} $CC9FLAGS"
64 	nmflags="-A -B"
65 	;;
66 *)
67 	echo do not know how to link on "$tag" 1>&2
68 	exit 1
69 esac
70 
71 if [ "x$1" = "x-l" ]
72 then
73 	shift
74 	doautolib=false
75 	doautoframework=false
76 elif [ "x$1" = "x-v" ]
77 then
78 	shift
79 	verbose=true
80 fi
81 
82 target=a.out
83 if [ "x$1" = "x-o" ]
84 then
85 	target=$2
86 fi
87 
88 if $doautolib
89 then
90 	ofiles=""
91 	lpaths="$PLAN9/lib"
92 	for i
93 	do
94 		case "$i" in
95 		*.[ao])
96 			ofiles="$ofiles $i"
97 			;;
98 		-L*)
99 			l=`echo $i | sed 's/-L//'`
100 			lpaths="$lpaths $l"
101 		esac
102 	done
103 
104 	if $verbose
105 	then
106 		echo "ofiles $ofiles"
107 		echo "lpaths $lpaths"
108 	fi
109 
110 	autolibs=""
111 	if [ "x$ofiles" != "x" ]
112 	then
113 		a=`
114 			nm $nmflags $ofiles |
115 			grep '__p9l_autolib_[a-zA-Z0-9+-]*' |
116 			sed 's/.*__p9l_autolib_//; s/:.*//' |
117 			sort -u
118 		`
119 		for i in $a
120 		do
121 			autolibs="$autolibs $i"
122 			eval "need$i=true"
123 		done
124 	fi
125 	if $verbose
126 	then
127 		echo "autolibs1 $autolibs"
128 	fi
129 
130 	# fetch dependencies out of libraries
131 	workq="$autolibs"
132 	while [ "x$workq" != "x" ]
133 	do
134 		w="$workq"
135 		workq=""
136 		for i in $w
137 		do
138 			# can't trust the libraries about using
139 			# libthread or libdraw - we might not be linking with
140 			# those object files.
141 			a=""
142 			for lpath in $lpaths
143 			do
144 				b=`
145 					nm $lpath/lib$i.a 2>/dev/null |
146 					grep '__p9l_autolib_[a-zA-Z0-9+-]*' |
147 					sed 's/.*__p9l_autolib_//; s/:.*//' |
148 					sort -u |
149 					egrep -v '^(thread|draw)$'
150 				`
151 				a="$a $b"
152 			done
153 			# fix up libraries that really need draw
154 			if [ "x$i" = "xmemdraw" -o "x$i" = "xmemlayer" -o "x$i" = "xframe" ]
155 			then
156 				a="$a draw"
157 			fi
158 			okayfn="true"
159 			for j in $a
160 			do
161 				if eval "[ x\$need$j = x ]"
162 				then
163 					autolibs="$autolibs $j"
164 					workq="$workq $j"
165 					eval "need$j=true"
166 				fi
167 				if [ $j != $i ]
168 				then
169 					okayfn="$okayfn && have$j"
170 				fi
171 			done
172 			if $verbose
173 			then
174 				echo "can$i: $okayfn"
175 			fi
176 			eval "can$i() { $okayfn; }"
177 		done
178 	done
179 	if $verbose
180 	then
181 		echo "autolibs $autolibs"
182 	fi
183 
184 	for i in $autolibs
185 	do
186 		eval "have$i() { false; }"
187 	done
188 	havethread() { false; }
189 	havesec() { false; }
190 	canmemlayer() { havedraw; }
191 
192 	# now find correct order
193 	libsl=""
194 	while [ "x$autolibs" != x ]
195 	do
196 		stillneed=""
197 		didnothing=true
198 		for i in $autolibs
199 		do
200 			if eval "can$i"
201 			then
202 				libsl="-l$i $libsl"
203 				eval "have$i() { true; }"
204 				didnothing=false
205 			else
206 				stillneed="$stillneed $i"
207 			fi
208 		done
209 		# break cycle by setting the last library on the list
210 		# to have no dependencies
211 		if $didnothing
212 		then
213 			j="xxx"
214 			for i in $autolibs
215 			do
216 				j=$i
217 			done
218 			echo "dependency cycle: $autolibs; breaking with $j"
219 			eval "can$j() { true; }"
220 		fi
221 		autolibs="$stillneed"
222 	done
223 	if $verbose
224 	then
225 		echo "liborder $libsl"
226 	fi
227 	libsl="$libsl -l9"
228 
229 	# cycle: lib9 expects p9main, which is defined in libthread.  oops.
230 	if havethread
231 	then
232 		libsl="$libsl -lthread -l9"
233 	fi
234 
235 	# cycle: lib9 netcrypt uses libsec
236 	if havesec
237 	then
238 		libsl="$libsl -lsec -l9"
239 	fi
240 
241 	if [ "x$needndb" = xtrue -a '(' -f /usr/lib/libresolv.a -o -f /usr/lib/libresolv.dylib ')' ]
242 	then
243 		libsl="$libsl -lresolv"
244 	fi
245 
246 	if [ "x$needX11" = xtrue -a "x$WSYSTYPE" != xnowsys ]
247 	then
248 		if [ "x$X11" = "x" ]
249 		then
250 			X11=/usr/X11R6
251 		fi
252 		# Don't say -L with a non-existent directory: Xcode complains.
253 		# x86_64 seems to put its 64-bit libraries in lib64.
254 		if [ "`uname -m`" = "x86_64" -a -d "$X11/lib64" ]
255 		then
256 			libsl="$libsl -L$X11/lib64"
257 		fi
258 		if [ -d "$X11/lib" ]
259 		then
260 			libsl="$libsl -L$X11/lib"
261 		fi
262 		libsl="$libsl -lX11"
263 	fi
264 fi
265 if $doautoframework
266 then
267 	ofiles=""
268 	for i
269 	do
270 		case "$i" in
271 		*.[ao])
272 			ofiles="$ofiles $i"
273 			;;
274 		esac
275 	done
276 
277 	# echo "ofiles $ofiles"
278 	autoframeworks=""
279 	if [ "x$ofiles" != "x" ]
280 	then
281 		a=`
282 			nm $ofiles |
283 			grep '__p9l_autoframework_[a-zA-Z0-9+-]*$' |
284 			sed 's/.*__p9l_autoframework_//' |
285 			sort -u
286 		`
287 		for i in $a
288 		do
289 			autoframeworks="$autoframeworks $i"
290 			eval "need$i=true"
291 		done
292 	fi
293 
294 	if $verbose
295 	then
296 		echo "autoframeworks $autoframeworks"
297 	fi
298 
299 	for i in $autoframeworks
300 	do
301 		eval "have$i() { false; }"
302 	done
303 
304 	frameworks=""
305 	for i in $autoframeworks
306 	do
307 		frameworks="-framework $i $frameworks"
308 	done
309 fi
310 
311 case "$userpath" in
312 true)
313 	for i in "$libsl $@"
314 	do
315 		case "$i" in
316 		-L*)
317 			s=`echo $i | sed 's/-L/-Wl,-rpath,/'`
318 			extralibs="$extralibs $s"
319 			;;
320 		esac
321 	done
322 	;;
323 esac
324 
325 if $verbose
326 then
327 	echo $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks
328 fi
329 
330 xtmp="${TMPDIR-/tmp}/9l.$$.$USER.out"
331 xxout() {
332 	sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . |
333 	egrep -v 'is (often|almost always) misused|is dangerous, better use|text-based stub'
334 	rm -f $xtmp
335 }
336 
337 if $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks >$xtmp 2>&1
338 then
339 	xxout
340 	exit 0
341 else
342 	xxout
343 	rm -f $target
344 	exit 1
345 fi
346