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=${CC9:-gcc}
16 	userpath=true
17 	extralibs="$extralibs -lutil"
18 	;;
19 *OSF1*)
20 	ld=${CC9:-cc}
21 	userpath=true
22 	extralibs="$extralibs -lutil"
23 	nmflags="-B"
24 	;;
25 *Linux*)
26 	ld=${CC9:-gcc}
27 	userpath=true
28 	extralibs="$extralibs -lutil -lresolv"
29 	case "${SYSVERSION:-`uname -r`}" in
30 	2.6.* | [3-9].* | [1-9][0-9].*)
31 		extralibs="$extralibs -lpthread"
32 		;;
33 	esac
34 	;;
35 *Darwin*x86_64*)
36 	ld="${CC9:-gcc} -m64"
37 	;;
38 *Darwin*)
39 	ld="${CC9:-gcc} -m32"
40 	;;
41 *SunOS*)
42 	ld="${CC9:-cc} -g"
43 	extralibs="$extralibs -lrt -lpthread -lsocket -lnsl"
44 	# Record paths to shared libraries to avoid needing LD_LIBRARY_PATH 
45 	for i in "$libsl $@"
46 	do
47 		case "$i" in
48 		-L*)
49 			s=`echo $i | sed 's/-L/-R/'`
50 			extralibs="$extralibs $s"
51 			;;
52 		esac
53 	done
54 	case "${SYSVERSION:-`uname -r`}" in
55 	5.[67])
56 		echo do not know how to link right thread library on "$tag" 1>&2
57 		;;
58 	5.8)
59 		# Some trickery is needed to force use of
60 		# alternate thread lib from /usr/lib/lwp
61 		# Likely, this only works with sun cc,
62 		# for other compiler/loader we would need other flags.
63 		ld="$ld -i"
64 		extralibs="$extralibs /usr/lib/lwp/libthread.so -R/usr/lib/lwp:/usr/lib"
65 		;;
66 	esac
67 	;;
68 *AIX*)
69 	ld=${CC9:-gcc}
70 	nmflags="-B"
71 	;;
72 *)
73 	echo do not know how to link on "$tag" 1>&2
74 	exit 1
75 esac
76 
77 if [ "x$1" = "x-l" ]
78 then
79 	shift
80 	doautolib=false
81 	doautoframework=false
82 elif [ "x$1" = "x-v" ]
83 then
84 	shift
85 	verbose=true
86 fi
87 
88 target=a.out
89 if [ "x$1" = "x-o" ]
90 then
91 	target=$2
92 fi
93 
94 if $doautolib
95 then
96 	ofiles=""
97 	lpaths="$PLAN9/lib"
98 	for i
99 	do
100 		case "$i" in
101 		*.[ao])
102 			ofiles="$ofiles $i"
103 			;;
104 		-L*)
105 			l=`echo $i | sed 's/-L//'`
106 			lpaths="$lpaths $l"
107 		esac
108 	done
109 	
110 	if $verbose
111 	then
112 		echo "ofiles $ofiles"
113 		echo "lpaths $lpaths"
114 	fi
115 
116 	autolibs=""
117 	if [ "x$ofiles" != "x" ]
118 	then
119 		a=`
120 			nm $nmflags $ofiles |
121 			grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
122 			sed 's/.*__p9l_autolib_//' |
123 			sort -u
124 		`
125 		for i in $a
126 		do
127 			autolibs="$autolibs $i"
128 			eval "need$i=true"
129 		done
130 	fi
131 	if $verbose
132 	then
133 		echo "autolibs1 $autolibs"
134 	fi
135 
136 	# fetch dependencies out of libraries
137 	workq="$autolibs"
138 	while [ "x$workq" != "x" ]
139 	do
140 		w="$workq"
141 		workq=""
142 		for i in $w
143 		do
144 			# can't trust the libraries about using
145 			# libthread or libdraw - we might not be linking with
146 			# those object files.
147 			a=""
148 			for lpath in $lpaths
149 			do
150 				b=`
151 					nm $lpath/lib$i.a 2>/dev/null |
152 					grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
153 					sed 's/.*__p9l_autolib_//' |
154 					sort -u |
155 					egrep -v '^(thread|draw)$'
156 				`
157 				a="$a $b"
158 			done
159 			# fix up libraries that really need draw
160 			if [ "x$i" = "xmemdraw" -o "x$i" = "xmemlayer" -o "x$i" = "xframe" ]
161 			then
162 				a="$a draw"
163 			fi
164 			okayfn="true"
165 			for j in $a
166 			do
167 				if eval "[ x\$need$j = x ]"
168 				then
169 					autolibs="$autolibs $j"
170 					workq="$workq $j"
171 					eval "need$j=true"
172 				fi
173 				if [ $j != $i ]
174 				then
175 					okayfn="$okayfn && have$j"
176 				fi
177 			done
178 			if $verbose
179 			then
180 				echo "can$i: $okayfn"
181 			fi
182 			eval "can$i() { $okayfn; }"
183 		done
184 	done
185 	if $verbose
186 	then
187 		echo "autolibs $autolibs"
188 	fi
189 
190 	for i in $autolibs
191 	do
192 		eval "have$i() { false; }"
193 	done
194 	havethread() { false; }
195 	havesec() { false; }
196 	canmemlayer() { havedraw; }
197 
198 	# now find correct order
199 	libsl=""
200 	while [ "x$autolibs" != x ]
201 	do
202 		stillneed=""
203 		didnothing=true
204 		for i in $autolibs
205 		do
206 			if eval "can$i"
207 			then
208 				libsl="-l$i $libsl"
209 				eval "have$i() { true; }"
210 				didnothing=false
211 			else
212 				stillneed="$stillneed $i"
213 			fi
214 		done
215 		# break cycle by setting the last library on the list
216 		# to have no dependencies
217 		if $didnothing
218 		then
219 			j="xxx"
220 			for i in $autolibs
221 			do
222 				j=$i
223 			done
224 			echo "dependency cycle: $autolibs; breaking with $j"
225 			eval "can$j() { true; }"
226 		fi
227 		autolibs="$stillneed"
228 	done
229 	if $verbose
230 	then
231 		echo "liborder $libsl"
232 	fi
233 	libsl="$libsl -l9"
234 
235 	# cycle: lib9 expects p9main, which is defined in libthread.  oops.
236 	if havethread
237 	then
238 		libsl="$libsl -lthread -l9"
239 	fi
240 
241 	# cycle: lib9 netcrypt uses libsec
242 	if havesec
243 	then
244 		libsl="$libsl -lsec -l9"
245 	fi
246 
247 	if [ "x$needndb" = xtrue -a '(' -f /usr/lib/libresolv.a -o -f /usr/lib/libresolv.dylib ')' ]
248 	then
249 		libsl="$libsl -lresolv"
250 	fi
251 
252 	if [ "x$needX11" = xtrue -a "x$WSYSTYPE" != xnowsys ]
253 	then
254 		if [ "x$X11" = "x" ]
255 		then
256 			X11=/usr/X11R6
257 		fi
258 		# Don't say -L with a non-existent directory: Xcode complains.
259 		# x86_64 seems to put its 64-bit libraries in lib64.
260 		if [ "${OBJTYPE:-`uname -m`}" = "x86_64" -a -d "$X11/lib64" ]
261 		then
262 			libsl="$libsl -L$X11/lib64"
263 		fi
264 		if [ -d "$X11/lib" ]
265 		then
266 			libsl="$libsl -L$X11/lib"
267 		fi
268 		libsl="$libsl -lX11"
269 	fi
270 fi
271 if $doautoframework
272 then
273 	ofiles=""
274 	for i
275 	do
276 		case "$i" in
277 		*.[ao])
278 			ofiles="$ofiles $i"
279 			;;
280 		esac
281 	done
282 
283 	# echo "ofiles $ofiles"
284 	autoframeworks=""
285 	if [ "x$ofiles" != "x" ]
286 	then
287 		a=`
288 			nm $ofiles |
289 			grep '__p9l_autoframework_[a-zA-Z0-9+-]*$' |
290 			sed 's/.*__p9l_autoframework_//' |
291 			sort -u
292 		`
293 		for i in $a
294 		do
295 			autoframeworks="$autoframeworks $i"
296 			eval "need$i=true"
297 		done
298 	fi
299 
300 	if $verbose
301 	then
302 		echo "autoframeworks $autoframeworks"
303 	fi
304 
305 	for i in $autoframeworks
306 	do
307 		eval "have$i() { false; }"
308 	done
309 
310 	frameworks=""
311 	for i in $autoframeworks
312 	do	
313 		frameworks="-framework $i $frameworks"
314 	done
315 fi
316 
317 case "$userpath" in
318 true)
319 	for i in "$libsl $@"
320 	do
321 		case "$i" in
322 		-L*)
323 			s=`echo $i | sed 's/-L/-Wl,-rpath,/'`
324 			extralibs="$extralibs $s"
325 			;;
326 		esac
327 	done
328 	;;
329 esac
330 
331 if $verbose
332 then
333 	echo $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks
334 fi
335 
336 xtmp="${TMPDIR-/tmp}/9l.$$.$USER.out"
337 xxout() {
338 	sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . | 
339 	egrep -v 'is (often|almost always) misused|is dangerous, better use|text-based stub' 
340 	rm -f $xtmp
341 }
342 
343 if $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks >$xtmp 2>&1
344 then
345 	xxout
346 	exit 0
347 else
348 	xxout
349 	rm -f $target
350 	exit 1
351 fi
352