2 # Generates multilib.h.
3 # Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002 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
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
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
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
30 # Each option in a set separated by slashes is mutually incompatible
31 # with all other options
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
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 optional sevenths argument is a list of OS subdirectory names.
67 # The format is the same as of the second argument.
68 # The difference is that second argument describes multilib directories
69 # in GCC conventions, while this one the OS multilib convention.
71 # The last option should be "yes" if multilibs are enabled. If it is not
72 # "yes", all GCC multilib dir names will be ".".
74 # The output looks like
75 # #define MULTILIB_MATCHES "\
76 # SUBDIRECTORY OPTIONS;\
79 # The SUBDIRECTORY is the subdirectory to use. The OPTIONS are
80 # multiple options separated by spaces. Each option may start with an
81 # exclamation point. gcc will consider each line in turn. If none of
82 # the options beginning with an exclamation point are present, and all
83 # of the other options are present, that subdirectory will be used.
84 # The order of the subdirectories is such that they can be created in
85 # order; that is, a subdirectory is preceded by all its parents.
87 # Here is an example (this is from the actual sparc64 case):
88 # genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
89 # 'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
90 # '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
91 # '../lib64 ../lib32 alt' yes
93 # ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
94 # "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;",
95 # "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;",
96 # "alt !m64 !m32 mno-app-regs mcmodel=medany;",
97 # "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
98 # "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
99 # "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;",
100 # "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
101 # "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
103 # The effect is that `gcc -mno-app-regs' (for example) will append "alt"
104 # to the directory name when searching for libraries or startup files and
105 # `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
106 # that exclusion above is moot, unless the compiler had a default of -m32,
107 # which would mean that all of the "alt" directories (not the 64/alt ones)
108 # would be ignored (not generated, nor used) since the exclusion also
109 # matches the multilib_default args.
111 # Copy the positional parameters into variables.
121 echo "static const char *const multilib_raw[] = {"
123 mkdir tmpmultilib.$$ || exit 1
124 cd tmpmultilib.$$ || exit 1
126 # What we want to do is select all combinations of the sets in
127 # options. Each combination which includes a set of mutually
128 # exclusive options must then be output multiple times, once for each
129 # item in the set. Selecting combinations is a recursive process.
130 # Since not all versions of sh support functions, we achieve recursion
131 # by creating a temporary shell script which invokes itself.
133 cat >tmpmultilib <<\EOF
135 # This recursive script basically outputs all combinations of its
136 # input arguments, handling mutually exclusive sets of options by
137 # repetition. When the script is called, ${initial} is the list of
138 # options which should appear before all combinations this will
139 # output. The output looks like a list of subdirectory names with
140 # leading and trailing slashes.
141 if [ "$#" != "0" ]; then
146 all=${initial}`echo $first | sed -e 's_|_/_'g`
147 first=`echo $first | sed -e 's_|_ _'g`
149 initial="${initial}${all}/" ./tmpmultilib $@
150 ./tmpmultilib $first $@ | grep -v "^${all}"
153 for opt in `echo $first | sed -e 's|/| |'g`; do
154 echo ${initial}${opt}/
157 for opt in `echo $first | sed -e 's|/| |'g`; do
158 initial="${initial}${opt}/" ./tmpmultilib $@
165 combinations=`initial=/ ./tmpmultilib ${options}`
167 # If there exceptions, weed them out now
168 if [ -n "${exceptions}" ]; then
169 cat >tmpmultilib2 <<\EOF
171 # This recursive script weeds out any combination of multilib
172 # switches that should not be generated. The output looks like
173 # a list of subdirectory names with leading and trailing slashes.
179 for except in ${exceptions}; do
180 echo " /${except}/) : ;;" >> tmpmultilib2
183 cat >>tmpmultilib2 <<\EOF
188 chmod +x tmpmultilib2
189 combinations=`./tmpmultilib2 ${combinations}`
192 # Construct a sed pattern which will convert option names to directory
195 if [ -n "${dirnames}" ]; then
198 for set in ${options}; do
199 for opts in `echo ${set} | sed -e 's|/| |'g`; do
201 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
202 if [ "$1" != "${opt}" ]; then
203 todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
205 if [ "${patt}" != "/${1}/" ]; then
206 todirnames="${todirnames} -e s|${patt}|/${1}/|g"
215 # Construct a sed pattern which will convert option names to OS directory
218 if [ -n "${osdirnames}" ]; then
221 for set in ${options}; do
222 for opts in `echo ${set} | sed -e 's|/| |'g`; do
224 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
225 if [ "$1" != "${opt}" ]; then
226 toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"
228 if [ "${patt}" != "/${1}/" ]; then
229 toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"
238 # We need another recursive shell script to correctly handle positive
239 # matches. If we are invoked as
240 # genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
242 # opt1/opt2 opt1 opt2
243 # opt1/opt2 nopt1 opt2
244 # opt1/opt2 opt1 nopt2
245 # opt1/opt2 nopt1 nopt2
246 # In other words, we must output all combinations of matches.
248 cat >tmpmultilib2 <<\EOF
250 # The positional parameters are a list of matches to consider.
251 # ${dirout} is the directory name and ${optout} is the current list of
253 if [ "$#" = "0" ]; then
254 echo "\"${dirout} ${optout};\","
258 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
259 l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
260 r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
261 if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
262 newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
263 dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
267 chmod +x tmpmultilib2
269 # Start with the current directory, which includes only negations.
271 for set in ${options}; do
272 for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
273 optout="${optout} !${opt}"
276 optout=`echo ${optout} | sed -e 's/^ //'`
277 echo "\". ${optout};\","
279 # Work over the list of combinations. We have to translate each one
280 # to use the directory names rather than the option names, we have to
281 # include the information in matches, and we have to generate the
282 # correct list of options and negations.
283 for combo in ${combinations}; do
284 # Use the directory names rather than the option names.
285 if [ -n "${todirnames}" ]; then
286 dirout=`echo ${combo} | sed ${todirnames}`
290 # Remove the leading and trailing slashes.
291 dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
293 # Use the OS directory names rather than the option names.
294 if [ -n "${toosdirnames}" ]; then
295 osdirout=`echo ${combo} | sed ${toosdirnames}`
296 # Remove the leading and trailing slashes.
297 osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/$||g'`
298 if [ "x${enable_multilib}" != xyes ]; then
299 dirout=".:${osdirout}"
301 dirout="${dirout}:${osdirout}"
304 if [ "x${enable_multilib}" != xyes ]; then
305 # genmultilib with --disable-multilib should be
306 # called with '' '' '' '' '' '' '' no
307 # if MULTILIB_OSDIRNAMES is empty.
312 # Look through the options. We must output each option that is
313 # present, and negate each option that is not present.
315 for set in ${options}; do
316 setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
317 for opt in ${setopts}; do
318 if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
319 optout="${optout} ${opt}"
321 optout="${optout} !${opt}"
325 optout=`echo ${optout} | sed -e 's/^ //'`
327 # Output the line with all appropriate matches.
328 dirout="${dirout}" optout="${optout}" ./tmpmultilib2
331 # Terminate the list of string.
335 # Output all of the matches now as option and that is the same as that, with
336 # a semicolon trailer. Include all of the normal options as well.
337 # Note, the format of the matches is reversed compared
338 # to what we want, so switch them around.
340 echo "static const char *const multilib_matches_raw[] = {"
341 for match in ${matches}; do
342 l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
343 r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
344 echo "\"${r} ${l};\","
346 for set in ${options}; do
347 for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
348 echo "\"${opt} ${opt};\","
354 # Output the default options now
356 echo "static const char *multilib_extra = \"${extra}\";"
358 # Output the exclusion rules now
360 echo "static const char *const multilib_exclusions_raw[] = {"
361 for rule in ${exclusions}; do
362 s=`echo ${rule} | sed -e 's,/, ,g'`
368 # Output the options now
369 moptions=`echo ${options} | sed -e 's,[ ][ ]*, ,g'`
371 echo "static const char *multilib_options = \"${moptions}\";"