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