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 *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*x86_64*)
31 	ld="${CC9:-gcc} -m64 $CC9FLAGS"
32 	;;
33 *Darwin*)
34 	ld="${CC9:-gcc} -m32 $CC9FLAGS"
35 	;;
36 *SunOS*)
37 	ld="${CC9:-cc} -g $CC9FLAGS"
38 	extralibs="$extralibs -lrt -lpthread -lsocket -lnsl"
39 	# Record paths to shared libraries to avoid needing LD_LIBRARY_PATH
40 	for i in "$libsl $@"
41 	do
42 		case "$i" in
43 		-L*)
44 			s=`echo $i | sed 's/-L/-R/'`
45 			extralibs="$extralibs $s"
46 			;;
47 		esac
48 	done
49 	case "${SYSVERSION:-`uname -r`}" in
50 	5.[67])
51 		echo do not know how to link right thread library on "$tag" 1>&2
52 		;;
53 	5.8)
54 		# Some trickery is needed to force use of
55 		# alternate thread lib from /usr/lib/lwp
56 		# Likely, this only works with sun cc,
57 		# for other compiler/loader we would need other flags.
58 		ld="$ld -i"
59 		extralibs="$extralibs /usr/lib/lwp/libthread.so -R/usr/lib/lwp:/usr/lib"
60 		;;
61 	esac
62 	;;
63 *AIX*)
64 	ld="${CC9:-xlc_r} -g -O0 $CC9FLAGS"
65 	nmflags="-A -B"
66 	extralibs="$extralibs -lpthread"
67 	;;
68 *)
69 	echo do not know how to link on "$tag" 1>&2
70 	exit 1
71 esac
72 
73 if [ "x$1" = "x-l" ]
74 then
75 	shift
76 	doautolib=false
77 	doautoframework=false
78 elif [ "x$1" = "x-v" ]
79 then
80 	shift
81 	verbose=true
82 fi
83 
84 target=a.out
85 if [ "x$1" = "x-o" ]
86 then
87 	target=$2
88 fi
89 
90 if $doautolib
91 then
92 	ofiles=""
93 	lpaths="$PLAN9/lib"
94 	for i
95 	do
96 		case "$i" in
97 		*.[ao])
98 			ofiles="$ofiles $i"
99 			;;
100 		-L*)
101 			l=`echo $i | sed 's/-L//'`
102 			lpaths="$lpaths $l"
103 		esac
104 	done
105 
106 	if $verbose
107 	then
108 		echo "ofiles $ofiles"
109 		echo "lpaths $lpaths"
110 	fi
111 
112 	autolibs=""
113 	if [ "x$ofiles" != "x" ]
114 	then
115 		a=`
116 			nm $nmflags $ofiles |
117 			grep '__p9l_autolib_[a-zA-Z0-9+-]*' |
118 			sed 's/.*__p9l_autolib_//; s/:.*//' |
119 			sort -u
120 		`
121 		for i in $a
122 		do
123 			autolibs="$autolibs $i"
124 			eval "need$i=true"
125 		done
126 	fi
127 	if $verbose
128 	then
129 		echo "autolibs1 $autolibs"
130 	fi
131 
132 	# fetch dependencies out of libraries
133 	workq="$autolibs"
134 	while [ "x$workq" != "x" ]
135 	do
136 		w="$workq"
137 		workq=""
138 		for i in $w
139 		do
140 			# can't trust the libraries about using
141 			# libthread or libdraw - we might not be linking with
142 			# those object files.
143 			a=""
144 			for lpath in $lpaths
145 			do
146 				b=`
147 					nm $lpath/lib$i.a 2>/dev/null |
148 					grep '__p9l_autolib_[a-zA-Z0-9+-]*' |
149 					sed 's/.*__p9l_autolib_//; s/:.*//' |
150 					sort -u |
151 					egrep -v '^(thread|draw)$'
152 				`
153 				a="$a $b"
154 			done
155 			# fix up libraries that really need draw
156 			if [ "x$i" = "xmemdraw" -o "x$i" = "xmemlayer" -o "x$i" = "xframe" ]
157 			then
158 				a="$a draw"
159 			fi
160 			okayfn="true"
161 			for j in $a
162 			do
163 				if eval "[ x\$need$j = x ]"
164 				then
165 					autolibs="$autolibs $j"
166 					workq="$workq $j"
167 					eval "need$j=true"
168 				fi
169 				if [ $j != $i ]
170 				then
171 					okayfn="$okayfn && have$j"
172 				fi
173 			done
174 			if $verbose
175 			then
176 				echo "can$i: $okayfn"
177 			fi
178 			eval "can$i() { $okayfn; }"
179 		done
180 	done
181 	if $verbose
182 	then
183 		echo "autolibs $autolibs"
184 	fi
185 
186 	for i in $autolibs
187 	do
188 		eval "have$i() { false; }"
189 	done
190 	havethread() { false; }
191 	havesec() { false; }
192 	canmemlayer() { havedraw; }
193 
194 	# now find correct order
195 	libsl=""
196 	while [ "x$autolibs" != x ]
197 	do
198 		stillneed=""
199 		didnothing=true
200 		for i in $autolibs
201 		do
202 			if eval "can$i"
203 			then
204 				libsl="-l$i $libsl"
205 				eval "have$i() { true; }"
206 				didnothing=false
207 			else
208 				stillneed="$stillneed $i"
209 			fi
210 		done
211 		# break cycle by setting the last library on the list
212 		# to have no dependencies
213 		if $didnothing
214 		then
215 			j="xxx"
216 			for i in $autolibs
217 			do
218 				j=$i
219 			done
220 			echo "dependency cycle: $autolibs; breaking with $j"
221 			eval "can$j() { true; }"
222 		fi
223 		autolibs="$stillneed"
224 	done
225 	if $verbose
226 	then
227 		echo "liborder $libsl"
228 	fi
229 	libsl="$libsl -l9"
230 
231 	# cycle: lib9 expects p9main, which is defined in libthread.  oops.
232 	if havethread
233 	then
234 		libsl="$libsl -lthread -l9"
235 	fi
236 
237 	# cycle: lib9 netcrypt uses libsec
238 	if havesec
239 	then
240 		libsl="$libsl -lsec -l9"
241 	fi
242 
243 	if [ "x$needndb" = xtrue -a '(' -f /usr/lib/libresolv.a -o -f /usr/lib/libresolv.dylib ')' ]
244 	then
245 		libsl="$libsl -lresolv"
246 	fi
247 
248 	if [ "x$needX11" = xtrue -a "x$WSYSTYPE" != xnowsys ]
249 	then
250 		if [ "x$X11" = "x" ]
251 		then
252 			X11=/usr/X11R6
253 		fi
254 		# Don't say -L with a non-existent directory: Xcode complains.
255 		# x86_64 seems to put its 64-bit libraries in lib64.
256 		if [ "${OBJTYPE:-`uname -m`}" = "x86_64" -a -d "$X11/lib64" ]
257 		then
258 			libsl="$libsl -L$X11/lib64"
259 		fi
260 		if [ -d "$X11/lib" ]
261 		then
262 			libsl="$libsl -L$X11/lib"
263 		fi
264 		libsl="$libsl -lX11"
265 	fi
266 fi
267 if $doautoframework
268 then
269 	ofiles=""
270 	for i
271 	do
272 		case "$i" in
273 		*.[ao])
274 			ofiles="$ofiles $i"
275 			;;
276 		esac
277 	done
278 
279 	# echo "ofiles $ofiles"
280 	autoframeworks=""
281 	if [ "x$ofiles" != "x" ]
282 	then
283 		a=`
284 			nm $ofiles |
285 			grep '__p9l_autoframework_[a-zA-Z0-9+-]*$' |
286 			sed 's/.*__p9l_autoframework_//' |
287 			sort -u
288 		`
289 		for i in $a
290 		do
291 			autoframeworks="$autoframeworks $i"
292 			eval "need$i=true"
293 		done
294 	fi
295 
296 	if $verbose
297 	then
298 		echo "autoframeworks $autoframeworks"
299 	fi
300 
301 	for i in $autoframeworks
302 	do
303 		eval "have$i() { false; }"
304 	done
305 
306 	frameworks=""
307 	for i in $autoframeworks
308 	do
309 		frameworks="-framework $i $frameworks"
310 	done
311 fi
312 
313 case "$userpath" in
314 true)
315 	for i in "$libsl $@"
316 	do
317 		case "$i" in
318 		-L*)
319 			s=`echo $i | sed 's/-L/-Wl,-rpath,/'`
320 			extralibs="$extralibs $s"
321 			;;
322 		esac
323 	done
324 	;;
325 esac
326 
327 if $verbose
328 then
329 	echo $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks
330 fi
331 
332 xtmp="${TMPDIR-/tmp}/9l.$$.$USER.out"
333 xxout() {
334 	sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . |
335 	egrep -v 'is (often|almost always) misused|is dangerous, better use|text-based stub'
336 	rm -f $xtmp
337 }
338 
339 if $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks >$xtmp 2>&1
340 then
341 	xxout
342 	exit 0
343 else
344 	xxout
345 	rm -f $target
346 	exit 1
347 fi
348