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=${CC9:-gcc}
16 	userpath=true
17 	extralibs="$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=${CC9:-gcc}
29 	userpath=true
30 	extralibs="$extralibs -lutil"
31 	;;
32 *OSF1*)
33 	ld=${CC9:-cc}
34 	userpath=true
35 	extralibs="$extralibs -lutil"
36 	nmflags="-B"
37 	;;
38 *Linux*)
39 	ld=${CC9:-gcc}
40 	userpath=true
41 	extralibs="$extralibs -lutil"
42 	case "${SYSVERSION:-`uname -r`}" in
43 	2.6.* | 3.*)
44 		extralibs="$extralibs -lpthread"
45 		;;
46 	esac
47 	;;
48 *Darwin*x86_64*)
49 	ld="${CC9:-gcc} -m64"
50 	;;
51 *Darwin*)
52 	ld="${CC9:-gcc} -m32"
53 	;;
54 *SunOS*)
55 	ld="${CC9:-cc} -g"
56 	extralibs="$extralibs -lrt -lpthread -lsocket -lnsl"
57 	# Record paths to shared libraries to avoid needing LD_LIBRARY_PATH 
58 	for i in "$libsl $@"
59 	do
60 		case "$i" in
61 		-L*)
62 			s=`echo $i | sed 's/-L/-R/'`
63 			extralibs="$extralibs $s"
64 			;;
65 		esac
66 	done
67 	case "${SYSVERSION:-`uname -r`}" in
68 	5.[67])
69 		echo do not know how to link right thread library on "$tag" 1>&2
70 		;;
71 	5.8)
72 		# Some trickery is needed to force use of
73 		# alternate thread lib from /usr/lib/lwp
74 		# Likely, this only works with sun cc,
75 		# for other compiler/loader we would need other flags.
76 		ld="$ld -i"
77 		extralibs="$extralibs /usr/lib/lwp/libthread.so -R/usr/lib/lwp:/usr/lib"
78 		;;
79 	esac
80 	;;
81 *AIX*)
82 	ld=${CC9:-gcc}
83 	nmflags="-B"
84 	;;
85 *)
86 	echo do not know how to link on "$tag" 1>&2
87 	exit 1
88 esac
89 
90 if [ "x$1" = "x-l" ]
91 then
92 	shift
93 	doautolib=false
94 	doautoframework=false
95 elif [ "x$1" = "x-v" ]
96 then
97 	shift
98 	verbose=true
99 fi
100 
101 target=a.out
102 if [ "x$1" = "x-o" ]
103 then
104 	target=$2
105 fi
106 
107 if $doautolib
108 then
109 	ofiles=""
110 	lpaths="$PLAN9/lib"
111 	for i
112 	do
113 		case "$i" in
114 		*.[ao])
115 			ofiles="$ofiles $i"
116 			;;
117 		-L*)
118 			l=`echo $i | sed 's/-L//'`
119 			lpaths="$lpaths $l"
120 		esac
121 	done
122 	
123 	if $verbose
124 	then
125 		echo "ofiles $ofiles"
126 		echo "lpaths $lpaths"
127 	fi
128 
129 	autolibs=""
130 	if [ "x$ofiles" != "x" ]
131 	then
132 		a=`
133 			nm $nmflags $ofiles |
134 			grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
135 			sed 's/.*__p9l_autolib_//' |
136 			sort -u
137 		`
138 		for i in $a
139 		do
140 			autolibs="$autolibs $i"
141 			eval "need$i=true"
142 		done
143 	fi
144 	if $verbose
145 	then
146 		echo "autolibs1 $autolibs"
147 	fi
148 
149 	# fetch dependencies out of libraries
150 	workq="$autolibs"
151 	while [ "x$workq" != "x" ]
152 	do
153 		w="$workq"
154 		workq=""
155 		for i in $w
156 		do
157 			# can't trust the libraries about using
158 			# libthread or libdraw - we might not be linking with
159 			# those object files.
160 			a=""
161 			for lpath in $lpaths
162 			do
163 				b=`
164 					nm $lpath/lib$i.a 2>/dev/null |
165 					grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
166 					sed 's/.*__p9l_autolib_//' |
167 					sort -u |
168 					egrep -v '^(thread|draw)$'
169 				`
170 				a="$a $b"
171 			done
172 			# fix up libraries that really need draw
173 			if [ "x$i" = "xmemdraw" -o "x$i" = "xmemlayer" -o "x$i" = "xframe" ]
174 			then
175 				a="$a draw"
176 			fi
177 			okayfn="true"
178 			for j in $a
179 			do
180 				if eval "[ x\$need$j = x ]"
181 				then
182 					autolibs="$autolibs $j"
183 					workq="$workq $j"
184 					eval "need$j=true"
185 				fi
186 				if [ $j != $i ]
187 				then
188 					okayfn="$okayfn && have$j"
189 				fi
190 			done
191 			if $verbose
192 			then
193 				echo "can$i: $okayfn"
194 			fi
195 			eval "can$i() { $okayfn; }"
196 		done
197 	done
198 	if $verbose
199 	then
200 		echo "autolibs $autolibs"
201 	fi
202 
203 	for i in $autolibs
204 	do
205 		eval "have$i() { false; }"
206 	done
207 	havethread() { false; }
208 	havesec() { false; }
209 	canmemlayer() { havedraw; }
210 
211 	# now find correct order
212 	libsl=""
213 	while [ "x$autolibs" != x ]
214 	do
215 		stillneed=""
216 		didnothing=true
217 		for i in $autolibs
218 		do
219 			if eval "can$i"
220 			then
221 				libsl="-l$i $libsl"
222 				eval "have$i() { true; }"
223 				didnothing=false
224 			else
225 				stillneed="$stillneed $i"
226 			fi
227 		done
228 		# break cycle by setting the last library on the list
229 		# to have no dependencies
230 		if $didnothing
231 		then
232 			j="xxx"
233 			for i in $autolibs
234 			do
235 				j=$i
236 			done
237 			echo "dependency cycle: $autolibs; breaking with $j"
238 			eval "can$j() { true; }"
239 		fi
240 		autolibs="$stillneed"
241 	done
242 	if $verbose
243 	then
244 		echo "liborder $libsl"
245 	fi
246 	libsl="$libsl -l9"
247 
248 	# cycle: lib9 expects p9main, which is defined in libthread.  oops.
249 	if havethread
250 	then
251 		libsl="$libsl -lthread -l9"
252 	fi
253 
254 	# cycle: lib9 netcrypt uses libsec
255 	if havesec
256 	then
257 		libsl="$libsl -lsec -l9"
258 	fi
259 
260 	if [ "x$needndb" = xtrue -a '(' -f /usr/lib/libresolv.a -o -f /usr/lib/libresolv.dylib ')' ]
261 	then
262 		libsl="$libsl -lresolv"
263 	fi
264 
265 	if [ "x$needX11" = xtrue -a "x$WSYSTYPE" != xnowsys ]
266 	then
267 		if [ "x$X11" = "x" ]
268 		then
269 			X11=/usr/X11R6
270 		fi
271 		# Don't say -L with a non-existent directory: Xcode complains.
272 		# x86_64 seems to put its 64-bit libraries in lib64.
273 		if [ "${OBJTYPE:-`uname -m`}" = "x86_64" -a -d "$X11/lib64" ]
274 		then
275 			libsl="$libsl -L$X11/lib64"
276 		fi
277 		if [ -d "$X11/lib" ]
278 		then
279 			libsl="$libsl -L$X11/lib"
280 		fi
281 		libsl="$libsl -lX11"
282 	fi
283 fi
284 if $doautoframework
285 then
286 	ofiles=""
287 	for i
288 	do
289 		case "$i" in
290 		*.[ao])
291 			ofiles="$ofiles $i"
292 			;;
293 		esac
294 	done
295 
296 	# echo "ofiles $ofiles"
297 	autoframeworks=""
298 	if [ "x$ofiles" != "x" ]
299 	then
300 		a=`
301 			nm $ofiles |
302 			grep '__p9l_autoframework_[a-zA-Z0-9+-]*$' |
303 			sed 's/.*__p9l_autoframework_//' |
304 			sort -u
305 		`
306 		for i in $a
307 		do
308 			autoframeworks="$autoframeworks $i"
309 			eval "need$i=true"
310 		done
311 	fi
312 
313 	if $verbose
314 	then
315 		echo "autoframeworks $autoframeworks"
316 	fi
317 
318 	for i in $autoframeworks
319 	do
320 		eval "have$i() { false; }"
321 	done
322 
323 	frameworks=""
324 	for i in $autoframeworks
325 	do	
326 		frameworks="-framework $i $frameworks"
327 	done
328 fi
329 
330 case "$userpath" in
331 true)
332 	for i in "$libsl $@"
333 	do
334 		case "$i" in
335 		-L*)
336 			s=`echo $i | sed 's/-L/-Wl,-rpath,/'`
337 			extralibs="$extralibs $s"
338 			;;
339 		esac
340 	done
341 	;;
342 esac
343 
344 if $verbose
345 then
346 	echo $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks
347 fi
348 
349 xtmp=/tmp/9l.$$.$USER.out
350 xxout() {
351 	sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . | 
352 	egrep -v 'is (often|almost always) misused|is dangerous, better use' 
353 	rm -f $xtmp
354 }
355 
356 if $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks >$xtmp 2>&1
357 then
358 	xxout
359 	exit 0
360 else
361 	xxout
362 	rm -f $target
363 	exit 1
364 fi
365