1#!/bin/sh 2# Generates multilib.h. 3# Copyright (C) 1994-2018 Free Software Foundation, Inc. 4 5#This file is part of GCC. 6 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 3, or (at your option) any later 10#version. 11 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. 16 17#You should have received a copy of the GNU General Public License 18#along with GCC; see the file COPYING3. If not see 19#<http://www.gnu.org/licenses/>. 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 or pipes. No leading dash is used on the 28# options. 29# Each option in a set separated by slashes is mutually incompatible 30# with all other options 31# in the set. 32# Each option in a set separated by pipes will be used for the library 33# compilation and any of the options in the set will be sufficient 34# for it to be triggered. 35 36# The optional second argument is a list of subdirectory names. If 37# the second argument is non-empty, there must be as many elements in 38# the second argument as there are options in the first argument. The 39# elements in the second list are separated by spaces. If the second 40# argument is empty, the option names will be used as the directory 41# names. 42 43# The optional third argument is a list of options which are 44# identical. The elements in the list are separated by spaces. Each 45# element must be of the form OPTION=OPTION. The first OPTION should 46# appear in the first argument, and the second should be a synonym for 47# it. Question marks are replaced with equal signs in both options. 48 49# The optional fourth argument is a list of multilib directory 50# combinations that should not be built. 51 52# The optional fifth argument is a list of options that should be 53# used whenever building multilib libraries. 54 55# The optional sixth argument is a list of exclusions used internally by 56# the compiler similar to exceptions. The difference being that exclusions 57# allow matching default options that genmultilib does not know about and 58# is done at runtime as opposed to being sorted out at compile time. 59# Each element in the list is a separate exclusion rule. Each rule is 60# a list of options (sans preceding '-') separated by a '/'. The options 61# on the rule are grouped as an AND operation, and all options much match 62# for the rule to exclude a set. Options can be preceded with a '!' to 63# match a logical NOT. 64 65# The optional seventh argument is a list of OS subdirectory names. 66# The format is either the same as of the second argument, or a set of 67# mappings. When it is the same as the second argument, it describes 68# the multilib directories using OS conventions, rather than GCC 69# conventions. When it is a set of mappings of the form gccdir=osdir, 70# the left side gives the GCC convention and the right gives the 71# equivalent OS defined location. If the osdir part begins with a !, 72# the os directory names are used exclusively. Use the mapping when 73# there is no one-to-one equivalence between GCC levels and the OS. 74 75# The optional eighth argument which intends to reduce the effort to write 76# so many MULTILIB_EXCEPTIONS rules. This option defines a series of option 77# combinations that we actually required. 78# For some cases, the generated option combinations are far more than what 79# we need, we have to write a lot of rules to screen out combinations we 80# don't need. If we missed some rules, the unexpected libraries will be built. 81# Now with this argument, one can simply give what combinations are needed. 82# It is pretty straigtforward. 83# This argument can be used together with MULTILIB_EXCEPTIONS and will take 84# effect after the MULTILIB_EXCEPTIONS. 85 86# The optional ninth argument is the multiarch name. 87 88# The optional tenth argument specifies how to reuse multilib for different 89# option sets. 90 91# The last option should be "yes" if multilibs are enabled. If it is not 92# "yes", all GCC multilib dir names will be ".". 93 94# The output looks like 95# #define MULTILIB_MATCHES "\ 96# SUBDIRECTORY OPTIONS;\ 97# ... 98# " 99# The SUBDIRECTORY is the subdirectory to use. The OPTIONS are 100# multiple options separated by spaces. Each option may start with an 101# exclamation point. gcc will consider each line in turn. If none of 102# the options beginning with an exclamation point are present, and all 103# of the other options are present, that subdirectory will be used. 104# The order of the subdirectories is such that they can be created in 105# order; that is, a subdirectory is preceded by all its parents. 106 107# Here is an example (this is from the actual sparc64 case): 108# genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt' 109# 'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*' 110# '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany' 111# '../lib64 ../lib32 alt' '' '' '' yes 112# This produces: 113# ". !m64 !m32 !mno-app-regs !mcmodel=medany;", 114# "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;", 115# "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;", 116# "alt !m64 !m32 mno-app-regs mcmodel=medany;", 117# "alt !m64 !m32 mno-app-regs !mcmodel=medany;", 118# "alt !m64 !m32 !mno-app-regs mcmodel=medany;", 119# "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;", 120# "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;", 121# "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;", 122# 123# The effect is that `gcc -mno-app-regs' (for example) will append "alt" 124# to the directory name when searching for libraries or startup files and 125# `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note 126# that exclusion above is moot, unless the compiler had a default of -m32, 127# which would mean that all of the "alt" directories (not the 64/alt ones) 128# would be ignored (not generated, nor used) since the exclusion also 129# matches the multilib_default args. 130 131# Copy the positional parameters into variables. 132options=$1 133dirnames=$2 134matches=$3 135exceptions=$4 136extra=$5 137exclusions=$6 138osdirnames=$7 139multilib_required=$8 140multiarch=$9 141multilib_reuse=${10} 142enable_multilib=${11} 143 144echo "static const char *const multilib_raw[] = {" 145 146mkdir tmpmultilib.$$ || exit 1 147# Use cd ./foo to avoid CDPATH output. 148cd ./tmpmultilib.$$ || exit 1 149 150# What we want to do is select all combinations of the sets in 151# options. Each combination which includes a set of mutually 152# exclusive options must then be output multiple times, once for each 153# item in the set. Selecting combinations is a recursive process. 154# Since not all versions of sh support functions, we achieve recursion 155# by creating a temporary shell script which invokes itself. 156rm -f tmpmultilib 157cat >tmpmultilib <<\EOF 158#!/bin/sh 159# This recursive script basically outputs all combinations of its 160# input arguments, handling mutually exclusive sets of options by 161# repetition. When the script is called, ${initial} is the list of 162# options which should appear before all combinations this will 163# output. The output looks like a list of subdirectory names with 164# leading and trailing slashes. 165if [ "$#" != "0" ]; then 166 first=$1 167 shift 168 case "$first" in 169 *\|*) 170 all=${initial}`echo $first | sed -e 's_|_/_'g` 171 first=`echo $first | sed -e 's_|_ _'g` 172 echo ${all}/ 173 initial="${initial}${all}/" ./tmpmultilib $@ 174 ./tmpmultilib $first $@ | grep -v "^${all}" 175 ;; 176 *) 177 for opt in `echo $first | sed -e 's|/| |'g`; do 178 echo ${initial}${opt}/ 179 done 180 ./tmpmultilib $@ 181 for opt in `echo $first | sed -e 's|/| |'g`; do 182 initial="${initial}${opt}/" ./tmpmultilib $@ 183 done 184 esac 185fi 186EOF 187chmod +x tmpmultilib 188 189combinations=`initial=/ ./tmpmultilib ${options}` 190 191# If there exceptions, weed them out now 192if [ -n "${exceptions}" ]; then 193 cat >tmpmultilib2 <<\EOF 194#!/bin/sh 195# This recursive script weeds out any combination of multilib 196# switches that should not be generated. The output looks like 197# a list of subdirectory names with leading and trailing slashes. 198 199 for opt in $@; do 200 case "$opt" in 201EOF 202 203 for except in ${exceptions}; do 204 echo " /${except}/) : ;;" >> tmpmultilib2 205 done 206 207cat >>tmpmultilib2 <<\EOF 208 *) echo ${opt};; 209 esac 210 done 211EOF 212 chmod +x tmpmultilib2 213 combinations=`./tmpmultilib2 ${combinations}` 214fi 215 216# If the MULTILIB_REQUIRED list are provided, 217# filter out combinations not in this list. 218if [ -n "${multilib_required}" ]; then 219 cat >tmpmultilib2 <<\EOF 220#!/bin/sh 221# This recursive script weeds out any combination of multilib 222# switches that not in the expected list. 223 224 for opt in $@; do 225 case "$opt" in 226EOF 227 228 for expect in ${multilib_required}; do 229 echo " /${expect}/) echo \${opt};;" >> tmpmultilib2 230 done 231 232cat >>tmpmultilib2 <<\EOF 233 *) ;; 234 esac 235 done 236EOF 237 238 chmod +x tmpmultilib2 239 combinations=`./tmpmultilib2 ${combinations}` 240 241fi 242 243# Construct a sed pattern which will convert option names to directory 244# names. 245todirnames= 246if [ -n "${dirnames}" ]; then 247 set x ${dirnames} 248 shift 249 for set in ${options}; do 250 for opts in `echo ${set} | sed -e 's|/| |'g`; do 251 patt="/" 252 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do 253 if [ "$1" != "${opt}" ]; then 254 todirnames="${todirnames} -e s|/${opt}/|/${1}/|g" 255 patt="${patt}${1}/" 256 if [ "${patt}" != "/${1}/" ]; then 257 todirnames="${todirnames} -e s|${patt}|/${1}/|g" 258 fi 259 fi 260 done 261 shift 262 done 263 done 264fi 265 266# Construct a sed pattern which will convert option names to OS directory 267# names. 268toosdirnames= 269defaultosdirname= 270defaultosdirname2= 271if [ -n "${multiarch}" ]; then 272 defaultosdirname=::${multiarch} 273fi 274if [ -n "${osdirnames}" ]; then 275 set x ${osdirnames} 276 shift 277 while [ $# != 0 ] ; do 278 case "$1" in 279 .=*) 280 defaultosdirname=`echo $1 | sed 's|^.=|:|'` 281 if [ -n "${multiarch}" ]; then 282 defaultosdirname=${defaultosdirname}:${multiarch} 283 fi 284 case "$defaultosdirname" in 285 ::*) ;; 286 *) 287 defaultosdirname2=${defaultosdirname} 288 defaultosdirname= 289 ;; 290 esac 291 shift 292 ;; 293 *=*) 294 patt=`echo $1 | sed -e 's|=|/$=/|'` 295 toosdirnames="${toosdirnames} -e s=^/${patt}/=" 296 shift 297 ;; 298 *) 299 break 300 ;; 301 esac 302 done 303 304 if [ $# != 0 ]; then 305 for set in ${options}; do 306 for opts in `echo ${set} | sed -e 's|/| |'g`; do 307 patt="/" 308 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do 309 if [ "$1" != "${opt}" ]; then 310 toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g" 311 patt="${patt}${1}/" 312 if [ "${patt}" != "/${1}/" ]; then 313 toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g" 314 fi 315 fi 316 done 317 shift 318 done 319 done 320 fi 321fi 322 323# We need another recursive shell script to correctly handle positive 324# matches. If we are invoked as 325# genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2" 326# we must output 327# opt1/opt2 opt1 opt2 328# opt1/opt2 nopt1 opt2 329# opt1/opt2 opt1 nopt2 330# opt1/opt2 nopt1 nopt2 331# In other words, we must output all combinations of matches. 332rm -f tmpmultilib2 333cat >tmpmultilib2 <<\EOF 334#!/bin/sh 335# The positional parameters are a list of matches to consider. 336# ${dirout} is the directory name and ${optout} is the current list of 337# options. 338if [ "$#" = "0" ]; then 339 echo "\"${dirout} ${optout};\"," 340else 341 first=$1 342 shift 343 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@ 344 l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'` 345 r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'` 346 if expr " ${optout} " : ".* ${l} .*" > /dev/null; then 347 newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'` 348 dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@ 349 fi 350fi 351EOF 352chmod +x tmpmultilib2 353 354# Start with the current directory, which includes only negations. 355optout= 356for set in ${options}; do 357 for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do 358 optout="${optout} !${opt}" 359 done 360done 361optout=`echo ${optout} | sed -e 's/^ //'` 362echo "\".${defaultosdirname} ${optout};\"," 363[ -n "${defaultosdirname2}" ] && echo "\".${defaultosdirname2} ${optout};\"," 364 365# This part of code convert an option combination to 366# its corresponding directory names. 367# The directory names will be deduced from MULTILIB_DIRNAMES, 368# MULTILIB_OSDIRNAMES or the option combination itself. 369rm -rf tmpmultilib3 370cat >tmpmultilib3 <<\EOF 371#!/bin/sh 372 373dirout= 374combo=$1 375todirnames=$2 376toosdirnames=$3 377enable_multilib=$4 378 379if [ -n "${todirnames}" ]; then 380 dirout=`echo ${combo} | sed ${todirnames}` 381else 382 dirout=`echo ${combo} | sed -e 's/=/-/g'` 383fi 384# Remove the leading and trailing slashes. 385dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` 386 387# Use the OS directory names rather than the option names. 388if [ -n "${toosdirnames}" ]; then 389 osdirout=`echo ${combo} | sed ${toosdirnames}` 390 # Remove the leading and trailing slashes. 391 osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` 392 if [ "x${enable_multilib}" != xyes ]; then 393 dirout=".:${osdirout}" 394 disable_multilib=yes 395 else 396 case "${osdirout}" in 397 !*) 398 dirout=`echo ${osdirout} | sed 's/^!//'` 399 ;; 400 *) 401 dirout="${dirout}:${osdirout}" 402 ;; 403 esac 404 fi 405else 406 if [ "x${enable_multilib}" != xyes ]; then 407 # genmultilib with --disable-multilib should be 408 # called with '' '' '' '' '' '' '' no 409 # if MULTILIB_OSDIRNAMES is empty. 410 exit 1 411 fi 412fi 413echo "${dirout}" 414EOF 415chmod +x tmpmultilib3 416 417# Script to look through the options and output each option that is present, 418# and negate each option that is not present. 419rm -rf tmpmultilib4 420cat > tmpmultilib4 <<\EOF 421#!/bin/sh 422 423optout= 424combo=$1 425options=$2 426 427for set in ${options}; do 428 setopts=`echo ${set} | sed -e 's_[/|]_ _g'` 429 for opt in ${setopts}; do 430 if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then 431 optout="${optout} ${opt}" 432 else 433 optout="${optout} !${opt}" 434 fi 435 done 436done 437optout=`echo ${optout} | sed -e 's/^ //'` 438echo "${optout}" 439EOF 440chmod +x tmpmultilib4 441 442# Work over the list of combinations. We have to translate each one 443# to use the directory names rather than the option names, we have to 444# include the information in matches, and we have to generate the 445# correct list of options and negations. 446for combo in ${combinations}; do 447 # Use the directory names rather than the option names. 448 dirout=`./tmpmultilib3 "${combo}" "${todirnames}" "${toosdirnames}" "${enable_multilib}"` 449 450 # Look through the options. We must output each option that is 451 # present, and negate each option that is not present. 452 optout=`./tmpmultilib4 "${combo}" "${options}"` 453 454 # Output the line with all appropriate matches. 455 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 456done 457 458# Terminate the list of string. 459echo "NULL" 460echo "};" 461 462# Generate a regular expression to validate option combinations. 463options_re= 464for set in ${options}; do 465 for opt in `echo ${set} | sed -e 's_[/|]_ _g' -e 's/+/./g' `; do 466 options_re="${options_re}${options_re:+|}${opt}" 467 done 468done 469options_re="^/((${options_re})/)*\$" 470 471# Output rules used for multilib reuse. 472echo "" 473echo "static const char *const multilib_reuse_raw[] = {" 474for rrule in ${multilib_reuse}; do 475 # The left part of the rule are the options we used to build multilib. 476 # The right part of the rule are the options that can reuse this multilib. 477 combo=`echo ${rrule} | sed -e 's/=.*$//' -e 's/\([^\\]\)\./\1=/g' -e 's/\\\././g'` 478 copts=`echo ${rrule} | sed -e 's/^.*=//' -e 's/\([^\\]\)\./\1=/g' -e 's/\\\././g'` 479 # The variable ${combinations} are the option combinations we will build 480 # multilib from. If the combination in the left part of reuse rule isn't 481 # in this variable, it means no multilib will be built for current reuse 482 # rule. Thus the reuse purpose specified by current rule is meaningless. 483 if expr "${combinations} " : ".*/${combo}/.*" > /dev/null; then 484 if echo "/${copts}/" | grep -E "${options_re}" > /dev/null; then 485 combo="/${combo}/" 486 dirout=`./tmpmultilib3 "${combo}" "${todirnames}" "${toosdirnames}" "${enable_multilib}"` 487 copts="/${copts}/" 488 optout=`./tmpmultilib4 "${copts}" "${options}"` 489 # Output the line with all appropriate matches. 490 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 491 else 492 echo "The rule ${rrule} contains an option absent from MULTILIB_OPTIONS." >&2 493 exit 1 494 fi 495 else 496 echo "The rule ${rrule} is trying to reuse nonexistent multilib." >&2 497 exit 1 498 fi 499done 500 501# Terminate the list of string. 502echo "NULL" 503echo "};" 504 505# Output all of the matches now as option and that is the same as that, with 506# a semicolon trailer. Include all of the normal options as well. 507# Note, the format of the matches is reversed compared 508# to what we want, so switch them around. 509echo "" 510echo "static const char *const multilib_matches_raw[] = {" 511for match in ${matches}; do 512 l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'` 513 r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'` 514 echo "\"${r} ${l};\"," 515done 516for set in ${options}; do 517 for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do 518 echo "\"${opt} ${opt};\"," 519 done 520done 521echo "NULL" 522echo "};" 523 524# Output the default options now 525echo "" 526echo "static const char *multilib_extra = \"${extra}\";" 527 528# Output the exclusion rules now 529echo "" 530echo "static const char *const multilib_exclusions_raw[] = {" 531for rule in ${exclusions}; do 532 s=`echo ${rule} | sed -e 's,/, ,g'` 533 echo "\"${s};\"," 534done 535echo "NULL" 536echo "};" 537 538# Output the options now 539moptions=`echo ${options} | sed -e 's,[ ][ ]*, ,g'` 540echo "" 541echo "static const char *multilib_options = \"${moptions}\";" 542 543# Finally output the disable flag if specified 544if [ "x${disable_multilib}" = xyes ]; then 545 echo "" 546 echo "#define DISABLE_MULTILIB 1" 547fi 548 549cd .. 550rm -r tmpmultilib.$$ 551 552exit 0 553