1#!/bin/sh 2# Generates multilib.h. 3# Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002, 2007, 2012 4# Free Software Foundation, Inc. 5 6#This file is part of GCC. 7 8#GCC is free software; you can redistribute it and/or modify it under 9#the terms of the GNU General Public License as published by the Free 10#Software Foundation; either version 3, or (at your option) any later 11#version. 12 13#GCC is distributed in the hope that it will be useful, but WITHOUT 14#ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 15#FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16#for more details. 17 18#You should have received a copy of the GNU General Public License 19#along with GCC; see the file COPYING3. If not see 20#<http://www.gnu.org/licenses/>. 21 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. 25 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. 36 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. 43 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. 49 50# The optional fourth argument is a list of multilib directory 51# combinations that should not be built. 52 53# The optional fifth argument is a list of options that should be 54# used whenever building multilib libraries. 55 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. 65 66# The optional seventh argument is a list of OS subdirectory names. 67# The format is either the same as of the second argument, or a set of 68# mappings. When it is the same as the second argument, it describes 69# the multilib directories using OS conventions, rather than GCC 70# conventions. When it is a set of mappings of the form gccdir=osdir, 71# the left side gives the GCC convention and the right gives the 72# equivalent OS defined location. If the osdir part begins with a !, 73# the os directory names are used exclusively. Use the mapping when 74# there is no one-to-one equivalence between GCC levels and the OS. 75 76# The optional eighth argument is the multiarch name. 77 78# The last option should be "yes" if multilibs are enabled. If it is not 79# "yes", all GCC multilib dir names will be ".". 80 81# The output looks like 82# #define MULTILIB_MATCHES "\ 83# SUBDIRECTORY OPTIONS;\ 84# ... 85# " 86# The SUBDIRECTORY is the subdirectory to use. The OPTIONS are 87# multiple options separated by spaces. Each option may start with an 88# exclamation point. gcc will consider each line in turn. If none of 89# the options beginning with an exclamation point are present, and all 90# of the other options are present, that subdirectory will be used. 91# The order of the subdirectories is such that they can be created in 92# order; that is, a subdirectory is preceded by all its parents. 93 94# Here is an example (this is from the actual sparc64 case): 95# genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt' 96# 'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*' 97# '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany' 98# '../lib64 ../lib32 alt' yes 99# This produces: 100# ". !m64 !m32 !mno-app-regs !mcmodel=medany;", 101# "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;", 102# "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;", 103# "alt !m64 !m32 mno-app-regs mcmodel=medany;", 104# "alt !m64 !m32 mno-app-regs !mcmodel=medany;", 105# "alt !m64 !m32 !mno-app-regs mcmodel=medany;", 106# "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;", 107# "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;", 108# "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;", 109# 110# The effect is that `gcc -mno-app-regs' (for example) will append "alt" 111# to the directory name when searching for libraries or startup files and 112# `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note 113# that exclusion above is moot, unless the compiler had a default of -m32, 114# which would mean that all of the "alt" directories (not the 64/alt ones) 115# would be ignored (not generated, nor used) since the exclusion also 116# matches the multilib_default args. 117 118# Copy the positional parameters into variables. 119options=$1 120dirnames=$2 121matches=$3 122exceptions=$4 123extra=$5 124exclusions=$6 125osdirnames=$7 126multiarch=$8 127enable_multilib=$9 128 129echo "static const char *const multilib_raw[] = {" 130 131mkdir tmpmultilib.$$ || exit 1 132# Use cd ./foo to avoid CDPATH output. 133cd ./tmpmultilib.$$ || exit 1 134 135# What we want to do is select all combinations of the sets in 136# options. Each combination which includes a set of mutually 137# exclusive options must then be output multiple times, once for each 138# item in the set. Selecting combinations is a recursive process. 139# Since not all versions of sh support functions, we achieve recursion 140# by creating a temporary shell script which invokes itself. 141rm -f tmpmultilib 142cat >tmpmultilib <<\EOF 143#!/bin/sh 144# This recursive script basically outputs all combinations of its 145# input arguments, handling mutually exclusive sets of options by 146# repetition. When the script is called, ${initial} is the list of 147# options which should appear before all combinations this will 148# output. The output looks like a list of subdirectory names with 149# leading and trailing slashes. 150if [ "$#" != "0" ]; then 151 first=$1 152 shift 153 case "$first" in 154 *\|*) 155 all=${initial}`echo $first | sed -e 's_|_/_'g` 156 first=`echo $first | sed -e 's_|_ _'g` 157 echo ${all}/ 158 initial="${initial}${all}/" ./tmpmultilib $@ 159 ./tmpmultilib $first $@ | grep -v "^${all}" 160 ;; 161 *) 162 for opt in `echo $first | sed -e 's|/| |'g`; do 163 echo ${initial}${opt}/ 164 done 165 ./tmpmultilib $@ 166 for opt in `echo $first | sed -e 's|/| |'g`; do 167 initial="${initial}${opt}/" ./tmpmultilib $@ 168 done 169 esac 170fi 171EOF 172chmod +x tmpmultilib 173 174combinations=`initial=/ ./tmpmultilib ${options}` 175 176# If there exceptions, weed them out now 177if [ -n "${exceptions}" ]; then 178 cat >tmpmultilib2 <<\EOF 179#!/bin/sh 180# This recursive script weeds out any combination of multilib 181# switches that should not be generated. The output looks like 182# a list of subdirectory names with leading and trailing slashes. 183 184 for opt in $@; do 185 case "$opt" in 186EOF 187 188 for except in ${exceptions}; do 189 echo " /${except}/) : ;;" >> tmpmultilib2 190 done 191 192cat >>tmpmultilib2 <<\EOF 193 *) echo ${opt};; 194 esac 195 done 196EOF 197 chmod +x tmpmultilib2 198 combinations=`./tmpmultilib2 ${combinations}` 199fi 200 201# Construct a sed pattern which will convert option names to directory 202# names. 203todirnames= 204if [ -n "${dirnames}" ]; then 205 set x ${dirnames} 206 shift 207 for set in ${options}; do 208 for opts in `echo ${set} | sed -e 's|/| |'g`; do 209 patt="/" 210 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do 211 if [ "$1" != "${opt}" ]; then 212 todirnames="${todirnames} -e s|/${opt}/|/${1}/|g" 213 patt="${patt}${1}/" 214 if [ "${patt}" != "/${1}/" ]; then 215 todirnames="${todirnames} -e s|${patt}|/${1}/|g" 216 fi 217 fi 218 done 219 shift 220 done 221 done 222fi 223 224# Construct a sed pattern which will convert option names to OS directory 225# names. 226toosdirnames= 227defaultosdirname= 228if [ -n "${multiarch}" ]; then 229 defaultosdirname=::${multiarch} 230fi 231if [ -n "${osdirnames}" ]; then 232 set x ${osdirnames} 233 shift 234 while [ $# != 0 ] ; do 235 case "$1" in 236 .=*) 237 defaultosdirname=`echo $1 | sed 's|^.=|:|'` 238 if [ -n "${multiarch}" ]; then 239 defaultosdirname=${defaultosdirname}:${multiarch} 240 fi 241 shift 242 ;; 243 *=*) 244 patt=`echo $1 | sed -e 's|=|/$=/|'` 245 toosdirnames="${toosdirnames} -e s=^/${patt}/=" 246 shift 247 ;; 248 *) 249 break 250 ;; 251 esac 252 done 253 254 if [ $# != 0 ]; then 255 for set in ${options}; do 256 for opts in `echo ${set} | sed -e 's|/| |'g`; do 257 patt="/" 258 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do 259 if [ "$1" != "${opt}" ]; then 260 toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g" 261 patt="${patt}${1}/" 262 if [ "${patt}" != "/${1}/" ]; then 263 toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g" 264 fi 265 fi 266 done 267 shift 268 done 269 done 270 fi 271fi 272 273# We need another recursive shell script to correctly handle positive 274# matches. If we are invoked as 275# genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2" 276# we must output 277# opt1/opt2 opt1 opt2 278# opt1/opt2 nopt1 opt2 279# opt1/opt2 opt1 nopt2 280# opt1/opt2 nopt1 nopt2 281# In other words, we must output all combinations of matches. 282rm -f tmpmultilib2 283cat >tmpmultilib2 <<\EOF 284#!/bin/sh 285# The positional parameters are a list of matches to consider. 286# ${dirout} is the directory name and ${optout} is the current list of 287# options. 288if [ "$#" = "0" ]; then 289 echo "\"${dirout} ${optout};\"," 290else 291 first=$1 292 shift 293 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@ 294 l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'` 295 r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'` 296 if expr " ${optout} " : ".* ${l} .*" > /dev/null; then 297 newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'` 298 dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@ 299 fi 300fi 301EOF 302chmod +x tmpmultilib2 303 304# Start with the current directory, which includes only negations. 305optout= 306for set in ${options}; do 307 for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do 308 optout="${optout} !${opt}" 309 done 310done 311optout=`echo ${optout} | sed -e 's/^ //'` 312echo "\".${defaultosdirname} ${optout};\"," 313 314# Work over the list of combinations. We have to translate each one 315# to use the directory names rather than the option names, we have to 316# include the information in matches, and we have to generate the 317# correct list of options and negations. 318for combo in ${combinations}; do 319 # Use the directory names rather than the option names. 320 if [ -n "${todirnames}" ]; then 321 dirout=`echo ${combo} | sed ${todirnames}` 322 else 323 dirout=`echo ${combo} | sed -e 's/=/-/g'` 324 fi 325 # Remove the leading and trailing slashes. 326 dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` 327 328 # Use the OS directory names rather than the option names. 329 if [ -n "${toosdirnames}" ]; then 330 osdirout=`echo ${combo} | sed ${toosdirnames}` 331 # Remove the leading and trailing slashes. 332 osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` 333 if [ "x${enable_multilib}" != xyes ]; then 334 dirout=".:${osdirout}" 335 disable_multilib=yes 336 else 337 case "${osdirout}" in 338 !*) 339 dirout=`echo ${osdirout} | sed 's/^!//'` 340 ;; 341 *) 342 dirout="${dirout}:${osdirout}" 343 ;; 344 esac 345 fi 346 else 347 if [ "x${enable_multilib}" != xyes ]; then 348 # genmultilib with --disable-multilib should be 349 # called with '' '' '' '' '' '' '' no 350 # if MULTILIB_OSDIRNAMES is empty. 351 exit 1 352 fi 353 fi 354 355 # Look through the options. We must output each option that is 356 # present, and negate each option that is not present. 357 optout= 358 for set in ${options}; do 359 setopts=`echo ${set} | sed -e 's_[/|]_ _g'` 360 for opt in ${setopts}; do 361 if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then 362 optout="${optout} ${opt}" 363 else 364 optout="${optout} !${opt}" 365 fi 366 done 367 done 368 optout=`echo ${optout} | sed -e 's/^ //'` 369 370 # Output the line with all appropriate matches. 371 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 372done 373 374# Terminate the list of string. 375echo "NULL" 376echo "};" 377 378# Output all of the matches now as option and that is the same as that, with 379# a semicolon trailer. Include all of the normal options as well. 380# Note, the format of the matches is reversed compared 381# to what we want, so switch them around. 382echo "" 383echo "static const char *const multilib_matches_raw[] = {" 384for match in ${matches}; do 385 l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'` 386 r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'` 387 echo "\"${r} ${l};\"," 388done 389for set in ${options}; do 390 for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do 391 echo "\"${opt} ${opt};\"," 392 done 393done 394echo "NULL" 395echo "};" 396 397# Output the default options now 398echo "" 399echo "static const char *multilib_extra = \"${extra}\";" 400 401# Output the exclusion rules now 402echo "" 403echo "static const char *const multilib_exclusions_raw[] = {" 404for rule in ${exclusions}; do 405 s=`echo ${rule} | sed -e 's,/, ,g'` 406 echo "\"${s};\"," 407done 408echo "NULL" 409echo "};" 410 411# Output the options now 412moptions=`echo ${options} | sed -e 's,[ ][ ]*, ,g'` 413echo "" 414echo "static const char *multilib_options = \"${moptions}\";" 415 416# Finally output the disable flag if specified 417if [ "x${disable_multilib}" = xyes ]; then 418 echo "" 419 echo "#define DISABLE_MULTILIB 1" 420fi 421 422cd .. 423rm -r tmpmultilib.$$ 424 425exit 0 426