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[official-gcc.git] / gcc / genmultilib
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1 #!/bin/sh
2 # Generates multilib.h.
3 # Copyright (C) 1994, 1995, 1996, 1997, 1999 Free Software Foundation, Inc.
5 #This file is part of GCC.
7 #GCC is free software; you can redistribute it and/or modify it under
8 #the terms of the GNU General Public License as published by the Free
9 #Software Foundation; either version 2, or (at your option) any later
10 #version.
12 #GCC is distributed in the hope that it will be useful, but WITHOUT
13 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 #FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 #for more details.
17 #You should have received a copy of the GNU General Public License
18 #along with GCC; see the file COPYING. If not, write to the Free
19 #Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20 #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 or pipes. No leading dash is used on the
29 # options.
30 # Each option in a set separated by slashes is mutually incompatible
31 # with all other options
32 # in the set.
33 # Each option in a set separated by pipes will be used for the library
34 # compilation and any of the options in the set will be sufficient
35 # for it to be triggered.
37 # The optional second argument is a list of subdirectory names. If
38 # the second argument is non-empty, there must be as many elements in
39 # the second argument as there are options in the first argument. The
40 # elements in the second list are separated by spaces. If the second
41 # argument is empty, the option names will be used as the directory
42 # names.
44 # The optional third argument is a list of options which are
45 # identical. The elements in the list are separated by spaces. Each
46 # element must be of the form OPTION=OPTION. The first OPTION should
47 # appear in the first argument, and the second should be a synonym for
48 # it. Question marks are replaced with equal signs in both options.
50 # The optional fourth argument is a list of multilib directory
51 # combinations that should not be built.
53 # The optional fifth argument is a list of options that should be
54 # used whenever building multilib libraries.
56 # The optional sixth argument is a list of exclusions used internally by
57 # the compiler similar to exceptions. The difference being that exclusions
58 # allow matching default options that genmultilib does not know about and
59 # is done at runtime as opposed to being sorted out at compile time.
60 # Each element in the list is a separate exclusion rule. Each rule is
61 # a list of options (sans preceding '-') separated by a '/'. The options
62 # on the rule are grouped as an AND operation, and all options much match
63 # for the rule to exclude a set. Options can be preceded with a '!' to
64 # match a logical NOT.
66 # The output looks like
67 # #define MULTILIB_MATCHES "\
68 # SUBDIRECTORY OPTIONS;\
69 # ...
70 # "
71 # The SUBDIRECTORY is the subdirectory to use. The OPTIONS are
72 # multiple options separated by spaces. Each option may start with an
73 # exclamation point. gcc will consider each line in turn. If none of
74 # the options beginning with an exclamation point are present, and all
75 # of the other options are present, that subdirectory will be used.
76 # The order of the subdirectories is such that they can be created in
77 # order; that is, a subdirectory is preceded by all its parents.
79 # Here is an example (this is from the actual sparc64 case):
80 # genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
81 # 'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
82 # 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
83 # This produces:
84 # ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
85 # "64 m64 !m32 !mno-app-regs !mcmodel=medany;",
86 # "32 !m64 m32 !mno-app-regs !mcmodel=medany;",
87 # "alt !m64 !m32 mno-app-regs mcmodel=medany;",
88 # "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
89 # "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
90 # "64/alt m64 !m32 mno-app-regs mcmodel=medany;",
91 # "64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
92 # "64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
94 # The effect is that `gcc -mno-app-regs' (for example) will append "alt"
95 # to the directory name when searching for libraries or startup files and
96 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
97 # that exclusion above is moot, unless the compiler had a default of -m32,
98 # which would mean that all of the "alt" directories (not the 64/alt ones)
99 # would be ignored (not generated, nor used) since the exclusion also
100 # matches the multilib_default args.
102 # Copy the positional parameters into variables.
103 options=$1
104 dirnames=$2
105 matches=$3
106 exceptions=$4
107 extra=$5
108 exclusions=$6
110 echo "static const char *const multilib_raw[] = {"
112 # What we want to do is select all combinations of the sets in
113 # options. Each combination which includes a set of mutually
114 # exclusive options must then be output multiple times, once for each
115 # item in the set. Selecting combinations is a recursive process.
116 # Since not all versions of sh support functions, we achieve recursion
117 # by creating a temporary shell script which invokes itself.
118 rm -f tmpmultilib
119 cat >tmpmultilib <<\EOF
120 #!/bin/sh
121 # This recursive script basically outputs all combinations of its
122 # input arguments, handling mutually exclusive sets of options by
123 # repetition. When the script is called, ${initial} is the list of
124 # options which should appear before all combinations this will
125 # output. The output looks like a list of subdirectory names with
126 # leading and trailing slashes.
127 if [ "$#" != "0" ]; then
128 first=$1
129 shift
130 case "$first" in
131 *\|*)
132 all=${initial}`echo $first | sed -e 's_|_/_'g`
133 first=`echo $first | sed -e 's_|_ _'g`
134 echo ${all}/
135 initial="${initial}${all}/" ./tmpmultilib $@
136 ./tmpmultilib $first $@ | grep -v "^${all}"
139 for opt in `echo $first | sed -e 's|/| |'g`; do
140 echo ${initial}${opt}/
141 done
142 ./tmpmultilib $@
143 for opt in `echo $first | sed -e 's|/| |'g`; do
144 initial="${initial}${opt}/" ./tmpmultilib $@
145 done
146 esac
149 chmod +x tmpmultilib
151 combinations=`initial=/ ./tmpmultilib ${options}`
153 rm -f tmpmultilib
155 # If there exceptions, weed them out now
156 if [ -n "${exceptions}" ]; then
157 rm -f tmpmultilib2
158 cat >tmpmultilib2 <<\EOF
159 #!/bin/sh
160 # This recursive script weeds out any combination of multilib
161 # switches that should not be generated. The output looks like
162 # a list of subdirectory names with leading and trailing slashes.
164 for opt in $@; do
165 case "$opt" in
168 for except in ${exceptions}; do
169 echo " /${except}/) : ;;" >> tmpmultilib2
170 done
172 cat >>tmpmultilib2 <<\EOF
173 *) echo ${opt};;
174 esac
175 done
177 chmod +x tmpmultilib2
178 combinations=`./tmpmultilib2 ${combinations}`
179 rm -f ./tmpmultilib2
182 # Construct a sed pattern which will convert option names to directory
183 # names.
184 todirnames=
185 if [ -n "${dirnames}" ]; then
186 set x ${dirnames}
187 shift
188 for set in ${options}; do
189 for opts in `echo ${set} | sed -e 's|/| |'g`; do
190 patt="/"
191 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
192 if [ "$1" != "${opt}" ]; then
193 todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
194 patt="${patt}${1}/"
195 if [ "${patt}" != "/${1}/" ]; then
196 todirnames="${todirnames} -e s|${patt}|/${1}/|g"
199 done
200 shift
201 done
202 done
205 # We need another recursive shell script to correctly handle positive
206 # matches. If we are invoked as
207 # genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
208 # we must output
209 # opt1/opt2 opt1 opt2
210 # opt1/opt2 nopt1 opt2
211 # opt1/opt2 opt1 nopt2
212 # opt1/opt2 nopt1 nopt2
213 # In other words, we must output all combinations of matches.
214 rm -f tmpmultilib2
215 cat >tmpmultilib2 <<\EOF
216 #!/bin/sh
217 # The positional parameters are a list of matches to consider.
218 # ${dirout} is the directory name and ${optout} is the current list of
219 # options.
220 if [ "$#" = "0" ]; then
221 echo "\"${dirout} ${optout};\","
222 else
223 first=$1
224 shift
225 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
226 l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
227 r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
228 if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
229 newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
230 dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
234 chmod +x tmpmultilib2
236 # Start with the current directory, which includes only negations.
237 optout=
238 for set in ${options}; do
239 for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
240 optout="${optout} !${opt}"
241 done
242 done
243 optout=`echo ${optout} | sed -e 's/^ //'`
244 echo "\". ${optout};\","
246 # Work over the list of combinations. We have to translate each one
247 # to use the directory names rather than the option names, we have to
248 # include the information in matches, and we have to generate the
249 # correct list of options and negations.
250 for combo in ${combinations}; do
251 # Use the directory names rather than the option names.
252 if [ -n "${todirnames}" ]; then
253 dirout=`echo ${combo} | sed ${todirnames}`
254 else
255 dirout=${combo}
257 # Remove the leading and trailing slashes.
258 dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
260 # Look through the options. We must output each option that is
261 # present, and negate each option that is not present.
262 optout=
263 for set in ${options}; do
264 setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
265 for opt in ${setopts}; do
266 if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
267 optout="${optout} ${opt}"
268 else
269 optout="${optout} !${opt}"
271 done
272 done
273 optout=`echo ${optout} | sed -e 's/^ //'`
275 # Output the line with all appropriate matches.
276 dirout="${dirout}" optout="${optout}" ./tmpmultilib2
277 done
279 # Terminate the list of string.
280 echo "NULL"
281 echo "};"
283 # Output all of the matches now as option and that is the same as that, with
284 # a semicolon trailer. Include all of the normal options as well.
285 # Note, the format of the matches is reversed compared
286 # to what we want, so switch them around.
287 echo ""
288 echo "static const char *const multilib_matches_raw[] = {"
289 for match in ${matches}; do
290 l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
291 r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
292 echo "\"${r} ${l};\","
293 done
294 for set in ${options}; do
295 for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
296 echo "\"${opt} ${opt};\","
297 done
298 done
299 echo "NULL"
300 echo "};"
302 # Output the default options now
303 echo ""
304 echo "static const char *multilib_extra = \"${extra}\";"
306 # Output the exclusion rules now
307 echo ""
308 echo "static const char *const multilib_exclusions_raw[] = {"
309 for rule in ${exclusions}; do
310 s=`echo ${rule} | sed -e 's,/, ,g'`
311 echo "\"${s};\","
312 done
313 echo "NULL"
314 echo "};"
316 rm -f tmpmultilib2
318 exit 0