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