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1.1 root 1: #!/bin/sh
2: # Generates multilib.h.
3: # Copyright (C) 1994 Free Software Foundation, Inc.
4:
5: #This file is part of GNU CC.
6:
7: #GNU CC is free software; you can redistribute it and/or modify
8: #it under the terms of the GNU General Public License as published by
9: #the Free Software Foundation; either version 2, or (at your option)
10: #any later version.
11:
12: #GNU CC is distributed in the hope that it will be useful,
13: #but WITHOUT ANY WARRANTY; without even the implied warranty of
14: #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: #GNU General Public License for more details.
16:
17: #You should have received a copy of the GNU General Public License
18: #along with GNU CC; see the file COPYING. If not, write to
19: #the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21: # This shell script produces a header file which the gcc driver
22: # program uses to pick which library to use based on the machine
23: # specific options that it is given.
24:
25: # The first argument is a list of sets of options. The elements in
26: # the list are separated by spaces. Within an element, the options
27: # are separated by slashes. No leading dash is used on the options.
28: # Each option in a set is mutually incompatible with all other options
29: # in the set.
30:
31: # The optional second argument is a list of subdirectory names. If
32: # the second argument is non-empty, there must be as many elements in
33: # the second argument as there are options in the first argument. The
34: # elements in the second list are separated by spaces. If the second
35: # argument is empty, the option names will be used as the directory
36: # names.
37:
38: # The optional third argument is a list of options which are
39: # identical. The elements in the list are separated by spaces. Each
40: # element must be of the form OPTION=OPTION. The first OPTION should
41: # appear in the first argument, and the second should be a synonym for
42: # it.
43:
44: # The output looks like
45: # #define MULTILIB_MATCHES "\
46: # SUBDIRECTORY OPTIONS;\
47: # ...
48: # "
49: # The SUBDIRECTORY is the subdirectory to use. The OPTIONS are
50: # multiple options separated by spaces. Each option may start with an
51: # exclamation point. gcc will consider each line in turn. If none of
52: # the options beginning with an exclamation point are present, and all
53: # of the other options are present, that subdirectory will be used.
54: # The order of the subdirectories is such that they can be created in
55: # order; that is, a subdirectory is preceded by all its parents.
56:
57: # Here is a example (this is simplified from the actual 680x0 case):
58: # genmultilib "m68000/m68020 msoft-float" "m68000 m68020 msoft-float"
59: # "m68000=mc68000"
60: # This produces:
61: # #define MULTILIB_MATCHES "\
62: # m68000/msoft-float m68000 msoft-float;\
63: # m68000/msoft-float mc68000 msoft-float;\
64: # m68020/msoft-float m68020 msoft-float;\
65: # msoft-float !m68000 !mc68000 !m68020 msoft-float;\
66: # m68000 m68000 !msoft-float;\
67: # m68000 mc60000 !msoft-float;\
68: # m68020 m68020 !msoft-float;\
69: # . !m68000 !mc68000 !m68020 !msoft-float;\
70: # "
71: # The effect is that `gcc -msoft-float' (for example) will append
72: # msoft-float to the directory name when searching for libraries or
73: # startup files, and `gcc -m68000 -msoft-float' (for example) will
74: # append m68000/msoft-float.
75:
76: # Copy the positional parameters into variables.
77: options=$1
78: dirnames=$2
79: matches=$3
80:
81: # What we want to do is select all combinations of the sets in
82: # options. Each combination which includes a set of mutually
83: # exclusive options must then be output multiple times, once for each
84: # item in the set. Selecting combinations is a recursive process.
85: # Since not all versions of sh support functions, we achieve recursion
86: # by creating a temporary shell script which invokes itself.
87: rm -f tmpmultilib
88: cat >tmpmultilib <<\EOF
89: #!/bin/sh
90: # This recursive script basically outputs all combinations of its
91: # input arguments, handling mutually exclusive sets of options by
92: # repetition. When the script is called, ${initial} is the list of
93: # options which should appear before all combinations this will
94: # output. The output looks like a list of subdirectory names with
95: # leading and trailing slashes.
96: if [ "$#" != "0" ]; then
97: first=$1
98: shift
99: for opt in `echo $first | sed -e 's|/| |'g`; do
100: echo ${initial}${opt}/
101: done
102: ./tmpmultilib $@
103: for opt in `echo $first | sed -e 's|/| |'g`; do
104: initial="${initial}${opt}/" ./tmpmultilib $@
105: done
106: fi
107: EOF
108: chmod +x tmpmultilib
109:
110: combinations=`initial=/ ./tmpmultilib ${options}`
111:
112: rm -f tmpmultilib
113:
114: # Construct a sed pattern which will convert option names to directory
115: # names.
116: todirnames=
117: if [ -n "${dirnames}" ]; then
118: set x ${dirnames}
119: shift
120: for set in ${options}; do
121: for opt in `echo ${set} | sed -e 's|/| |'g`; do
122: if [ "$1" != "${opt}" ]; then
123: todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
124: fi
125: shift
126: done
127: done
128: fi
129:
130: # Construct a sed pattern which will add negations based on the
131: # matches. The semicolons are easier than getting the shell to accept
132: # quoted spaces when expanding a variable.
133: matchnegations=
134: for i in ${matches}; do
135: l=`echo $i | sed -e 's/=.*$//'`
136: r=`echo $i | sed -e 's/^.*=//'`
137: matchnegations="${matchnegations} -e s/;!${l};/;!${l};!${r};/"
138: done
139:
140: # We need another recursive shell script to correctly handle positive
141: # matches. If we are invoked as
142: # genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
143: # we must output
144: # opt1/opt2 opt1 opt2
145: # opt1/opt2 nopt1 opt2
146: # opt1/opt2 opt1 nopt2
147: # opt1/opt2 nopt1 nopt2
148: # In other words, we must output all combinations of matches.
149: rm -f tmpmultilib2
150: cat >tmpmultilib2 <<\EOF
151: #!/bin/sh
152: # The positional parameters are a list of matches to consider.
153: # ${dirout} is the directory name and ${optout} is the current list of
154: # options.
155: if [ "$#" = "0" ]; then
156: echo "${dirout} ${optout};\\"
157: else
158: first=$1
159: shift
160: dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
161: l=`echo ${first} | sed -e 's/=.*$//'`
162: r=`echo ${first} | sed -e 's/^.*=//'`
163: case " ${optout} " in
164: *" ${l} "*)
165: newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
166: dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
167: ;;
168: esac
169: fi
170: EOF
171: chmod +x tmpmultilib2
172:
173: # We are ready to start output.
174: echo '#define MULTILIB_SELECT "\'
175:
176: # Start with the current directory, which includes only negations.
177: optout=
178: for set in ${options}; do
179: for opt in `echo ${set} | sed -e 's|/| |'g`; do
180: optout="${optout} !${opt}"
181: done
182: done
183: optout=`echo ${optout} | sed -e 's/^ //'`
184: if [ -n "${matchnegations}" ]; then
185: optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'`
186: fi
187: echo ". ${optout};\\"
188:
189: # Work over the list of combinations. We have to translate each one
190: # to use the directory names rather than the option names, we have to
191: # include the information in matches, and we have to generate the
192: # correct list of options and negations.
193: for combo in ${combinations}; do
194: # Use the directory names rather than the option names.
195: if [ -n "${todirnames}" ]; then
196: dirout=`echo ${combo} | sed ${todirnames}`
197: else
198: dirout=${combo}
199: fi
200: # Remove the leading and trailing slashes.
201: dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
202:
203: # Look through the options. We must output each option that is
204: # present, and negate each option that is not present. If an
205: # element of a set is present, we need not negate the other elements
206: # of the set.
207: optout=
208: for set in ${options}; do
209: setopts=`echo ${set} | sed -e 's|/| |g'`
210: found=
211: for opt in ${setopts}; do
212: case "${combo}" in
213: *"/${opt}/"*)
214: optout="${optout} ${opt}"
215: found=yes
216: ;;
217: esac
218: done
219: if [ "${found}" = "" ]; then
220: for opt in ${setopts}; do
221: optout="${optout} !${opt}"
222: done
223: fi
224: done
225: optout=`echo ${optout} | sed -e 's/^ //'`
226:
227: # Add any negations of matches.
228: if [ -n "${matchnegations}" ]; then
229: optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'`
230: fi
231:
232: # Output the line with all appropriate matches.
233: dirout="${dirout}" optout="${optout}" ./tmpmultilib2 ${matches}
234: done
235:
236: rm -f tmpmultilib2
237:
238: # That's it.
239: echo '"'
240:
241: exit 0
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