INSTALL: fix build on Snow Leopard

http://codereview.appspot.com/116073

bin/9a

@@ -5,5 +5,11 @@ if [ $# != 1 ]; then
 	exit 1
 fi
 
+aflags=""
+case "`uname`" in
+Darwin)
+	aflags="-arch i386"
+esac
+
 out=`echo $1 | sed 's/\.s$//;s/$/.o/'`
-exec as -o $out $1
+exec as $aflags -o $out $1

bin/9c

@@ -25,7 +25,7 @@ tag="${SYSNAME:-`uname`}-${OBJTYPE:-`uname -m`}-${CC9:-cc}"
 case "$tag" in
 *BSD*)	usegcc ;;
 *Darwin*)	usegcc 
-		cflags="$ngflags -g3 -no-cpp-precomp" ;;
+		cflags="$ngflags -g3 -no-cpp-precomp -m32" ;;
 *HP-UX*)	cc=cc; cflags="-g -O -c -Ae" ;;
 *Linux*)	usegcc 
 		case "${CC9:-gcc}" in
@@ -76,7 +76,7 @@ xtmp=/tmp/9c.$$.$USER.out
 $cc -DPLAN9PORT -I$PLAN9/include $cflags "$@" 2>$xtmp
 status=$?
 grep -v '__p9l_autolib_' $xtmp |
-egrep -v ': error: .Each undeclared identifier|: error: for each function it appears|is dangerous, better use|is almost always misused|: In function |: At top level:|support .long long.|In file included from|        from|use of C99 long long|ISO C forbids conversion|Cursor. is deprecated|warn_unused_result' |
+egrep -v ': error: .Each undeclared identifier|: error: for each function it appears|is dangerous, better use|is almost always misused|: In function |: At top level:|support .long long.|In file included from|        from|use of C99 long long|ISO C forbids conversion|is deprecated|warn_unused_result' |
 sed 's/ .first use in this function.$//; s/\"\([^\"][^\"]*\)\", line \([0-9][0-9]*\)/\1:\2/g' |
 uniq 1>&2
 rm -f $xtmp $xtmp.status

bin/9l

@@ -46,7 +46,7 @@ case "$tag" in
 	esac
 	;;
 *Darwin*)
-	ld=gcc
+	ld="gcc -m32"
 	;;
 *SunOS*)
 	ld="${CC9:-cc} -g"