[official-gcc.git] / gcc / genmultilib
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1 #!/bin/sh
2 # Generates multilib.h.
3 # Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
5 #This file is part of GNU CC.
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.
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.
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, 59 Temple Place - Suite 330,
20 #Boston, MA 02111-1307, USA.
22 # This shell script produces a header file which the gcc driver
23 # program uses to pick which library to use based on the machine
24 # specific options that it is given.
26 # The first argument is a list of sets of options. The elements in
27 # the list are separated by spaces. Within an element, the options
28 # are separated by slashes. No leading dash is used on the options.
29 # Each option in a set is mutually incompatible with all other options
30 # in the set.
32 # The optional second argument is a list of subdirectory names. If
33 # the second argument is non-empty, there must be as many elements in
34 # the second argument as there are options in the first argument. The
35 # elements in the second list are separated by spaces. If the second
36 # argument is empty, the option names will be used as the directory
37 # names.
39 # The optional third argument is a list of options which are
40 # identical. The elements in the list are separated by spaces. Each
41 # element must be of the form OPTION=OPTION. The first OPTION should
42 # appear in the first argument, and the second should be a synonym for
43 # it. Question marks are replaced with equal signs in both options.
45 # The optional fourth argument is a list of multilib directory
46 # combinations that should not be built.
48 # The optional fifth argument is a list of options that should be
49 # used whenever building multilib libraries.
51 # The output looks like
52 # #define MULTILIB_MATCHES "\
53 # SUBDIRECTORY OPTIONS;\
54 # ...
55 # "
56 # The SUBDIRECTORY is the subdirectory to use. The OPTIONS are
57 # multiple options separated by spaces. Each option may start with an
58 # exclamation point. gcc will consider each line in turn. If none of
59 # the options beginning with an exclamation point are present, and all
60 # of the other options are present, that subdirectory will be used.
61 # The order of the subdirectories is such that they can be created in
62 # order; that is, a subdirectory is preceded by all its parents.
64 # Here is a example (this is simplified from the actual 680x0 case):
65 # genmultilib "m68000/m68020 msoft-float" "m68000 m68020 msoft-float"
66 # "m68000=mc68000"
67 # This produces:
68 # ". !m68000 !mc68000 !m68020 !msoft-float;",
69 # "m68000 m68000 !m68020 !msoft-float;",
70 # "m68000 mc60000 !m68020 !msoft-float;",
71 # "m68020 !m68000 !mc68000 m68020 !msoft-float;",
72 # "msoft-float !m68000 !mc68000 !m68020 msoft-float;",
73 # "m68000/msoft-float m68000 !m68020 msoft-float;",
74 # "m68000/msoft-float mc68000 !m68020 msoft-float;",
75 # "m68020/msoft-float !m68000 !mc68000 m68020 msoft-float;",
77 # The effect is that `gcc -msoft-float' (for example) will append
78 # msoft-float to the directory name when searching for libraries or
79 # startup files, and `gcc -m68000 -msoft-float' (for example) will
80 # append m68000/msoft-float.
82 # Copy the positional parameters into variables.
83 options=$1
84 dirnames=$2
85 matches=$3
86 exceptions=$4
87 extra=$5
89 echo "static char *multilib_raw[] = {"
91 # What we want to do is select all combinations of the sets in
92 # options. Each combination which includes a set of mutually
93 # exclusive options must then be output multiple times, once for each
94 # item in the set. Selecting combinations is a recursive process.
95 # Since not all versions of sh support functions, we achieve recursion
96 # by creating a temporary shell script which invokes itself.
97 rm -f tmpmultilib
98 cat >tmpmultilib <<\EOF
99 #!/bin/sh
100 # This recursive script basically outputs all combinations of its
101 # input arguments, handling mutually exclusive sets of options by
102 # repetition. When the script is called, ${initial} is the list of
103 # options which should appear before all combinations this will
104 # output. The output looks like a list of subdirectory names with
105 # leading and trailing slashes.
106 if [ "$#" != "0" ]; then
107 first=$1
108 shift
109 for opt in `echo $first | sed -e 's|/| |'g`; do
110 echo ${initial}${opt}/
111 done
112 ./tmpmultilib $@
113 for opt in `echo $first | sed -e 's|/| |'g`; do
114 initial="${initial}${opt}/" ./tmpmultilib $@
115 done
118 chmod +x tmpmultilib
120 combinations=`initial=/ ./tmpmultilib ${options}`
122 rm -f tmpmultilib
124 # If there exceptions, weed them out now
125 if [ -n "${exceptions}" ]; then
126 rm -f tmpmultilib2
127 cat >tmpmultilib2 <<\EOF
128 #!/bin/sh
129 # This recursive script weeds out any combination of multilib
130 # switches that should not be generated. The output looks like
131 # a list of subdirectory names with leading and trailing slashes.
133 for opt in $@; do
134 case "$opt" in
137 for except in ${exceptions}; do
138 echo " /${except}/) : ;;" >> tmpmultilib2
139 done
141 cat >>tmpmultilib2 <<\EOF
142 *) echo ${opt};;
143 esac
144 done
146 chmod +x tmpmultilib2
147 combinations=`./tmpmultilib2 ${combinations}`
148 rm -f ./tmpmultilib2
151 # Construct a sed pattern which will convert option names to directory
152 # names.
153 todirnames=
154 if [ -n "${dirnames}" ]; then
155 set x ${dirnames}
156 shift
157 for set in ${options}; do
158 for opt in `echo ${set} | sed -e 's|/| |'g`; do
159 if [ "$1" != "${opt}" ]; then
160 todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
162 shift
163 done
164 done
167 # We need another recursive shell script to correctly handle positive
168 # matches. If we are invoked as
169 # genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
170 # we must output
171 # opt1/opt2 opt1 opt2
172 # opt1/opt2 nopt1 opt2
173 # opt1/opt2 opt1 nopt2
174 # opt1/opt2 nopt1 nopt2
175 # In other words, we must output all combinations of matches.
176 rm -f tmpmultilib2
177 cat >tmpmultilib2 <<\EOF
178 #!/bin/sh
179 # The positional parameters are a list of matches to consider.
180 # ${dirout} is the directory name and ${optout} is the current list of
181 # options.
182 if [ "$#" = "0" ]; then
183 echo "\"${dirout} ${optout};\","
184 else
185 first=$1
186 shift
187 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
188 l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
189 r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
190 if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
191 newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
192 dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
196 chmod +x tmpmultilib2
198 # Start with the current directory, which includes only negations.
199 optout=
200 for set in ${options}; do
201 for opt in `echo ${set} | sed -e 's|/| |'g`; do
202 optout="${optout} !${opt}"
203 done
204 done
205 optout=`echo ${optout} | sed -e 's/^ //'`
206 echo "\". ${optout};\","
208 # Work over the list of combinations. We have to translate each one
209 # to use the directory names rather than the option names, we have to
210 # include the information in matches, and we have to generate the
211 # correct list of options and negations.
212 for combo in ${combinations}; do
213 # Use the directory names rather than the option names.
214 if [ -n "${todirnames}" ]; then
215 dirout=`echo ${combo} | sed ${todirnames}`
216 else
217 dirout=${combo}
219 # Remove the leading and trailing slashes.
220 dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
222 # Look through the options. We must output each option that is
223 # present, and negate each option that is not present.
224 optout=
225 for set in ${options}; do
226 setopts=`echo ${set} | sed -e 's|/| |g'`
227 for opt in ${setopts}; do
228 if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
229 optout="${optout} ${opt}"
230 else
231 optout="${optout} !${opt}"
233 done
234 done
235 optout=`echo ${optout} | sed -e 's/^ //'`
237 # Output the line with all appropriate matches.
238 dirout="${dirout}" optout="${optout}" ./tmpmultilib2
239 done
241 # Terminate the list of string.
242 echo "NULL"
243 echo "};"
245 # Output all of the matches now as option and that is the same as that, with
246 # a semicolon trailer. Include all of the normal options as well.
247 # Note, the format of the matches is reversed compared
248 # to what we want, so switch them around.
249 echo ""
250 echo "static char *multilib_matches_raw[] = {"
251 for match in ${matches}; do
252 l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
253 r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
254 echo "\"${r} ${l};\","
255 done
256 for set in ${options}; do
257 for opt in `echo ${set} | sed -e 's|/| |'g`; do
258 echo "\"${opt} ${opt};\","
259 done
260 done
261 echo "NULL"
262 echo "};"
264 # Output the default options now
265 echo ""
266 echo "static char *multilib_extra = \"${extra}\";"
267 rm -f tmpmultilib2
269 exit 0