1#!/bin/sh 2# Generates multilib.h. 3# Copyright (C) 1994-2020 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#!${CONFIG_SHELL:-/bin/sh} 159EOF 160cat >>tmpmultilib <<\EOF 161# This recursive script basically outputs all combinations of its 162# input arguments, handling mutually exclusive sets of options by 163# repetition. When the script is called, ${initial} is the list of 164# options which should appear before all combinations this will 165# output. The output looks like a list of subdirectory names with 166# leading and trailing slashes. 167if [ "$#" != "0" ]; then 168 first=$1 169 shift 170 case "$first" in 171 *\|*) 172 all=${initial}`echo $first | sed -e 's_|_/_'g` 173 first=`echo $first | sed -e 's_|_ _'g` 174 echo ${all}/ 175 initial="${initial}${all}/" ./tmpmultilib $@ 176 ./tmpmultilib $first $@ | grep -v "^${all}" 177 ;; 178 *) 179 for opt in `echo $first | sed -e 's|/| |'g`; do 180 echo ${initial}${opt}/ 181 done 182 ./tmpmultilib $@ 183 for opt in `echo $first | sed -e 's|/| |'g`; do 184 initial="${initial}${opt}/" ./tmpmultilib $@ 185 done 186 esac 187fi 188EOF 189chmod +x tmpmultilib 190 191combinations=`initial=/ ./tmpmultilib ${options}` 192 193# If there exceptions, weed them out now 194if [ -n "${exceptions}" ]; then 195 cat >tmpmultilib2 <<EOF 196#!${CONFIG_SHELL:-/bin/sh} 197EOF 198 cat >>tmpmultilib2 <<\EOF 199# This recursive script weeds out any combination of multilib 200# switches that should not be generated. The output looks like 201# a list of subdirectory names with leading and trailing slashes. 202 203 for opt in $@; do 204 case "$opt" in 205EOF 206 207 for except in ${exceptions}; do 208 echo " /${except}/) : ;;" >> tmpmultilib2 209 done 210 211cat >>tmpmultilib2 <<\EOF 212 *) echo ${opt};; 213 esac 214 done 215EOF 216 chmod +x tmpmultilib2 217 combinations=`./tmpmultilib2 ${combinations}` 218fi 219 220# If the MULTILIB_REQUIRED list are provided, 221# filter out combinations not in this list. 222if [ -n "${multilib_required}" ]; then 223 cat >tmpmultilib2 <<\EOF 224#!/bin/sh 225# This recursive script weeds out any combination of multilib 226# switches that not in the expected list. 227 228 for opt in $@; do 229 case "$opt" in 230EOF 231 232 for expect in ${multilib_required}; do 233 echo " /${expect}/) echo \${opt};;" >> tmpmultilib2 234 done 235 236cat >>tmpmultilib2 <<\EOF 237 *) ;; 238 esac 239 done 240EOF 241 242 chmod +x tmpmultilib2 243 combinations=`./tmpmultilib2 ${combinations}` 244 245fi 246 247# Construct a sed pattern which will convert option names to directory 248# names. 249todirnames= 250if [ -n "${dirnames}" ]; then 251 set x ${dirnames} 252 shift 253 for set in ${options}; do 254 for opts in `echo ${set} | sed -e 's|/| |'g`; do 255 patt="/" 256 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do 257 if [ "$1" != "${opt}" ]; then 258 todirnames="${todirnames} -e s|/${opt}/|/${1}/|g" 259 patt="${patt}${1}/" 260 if [ "${patt}" != "/${1}/" ]; then 261 todirnames="${todirnames} -e s|${patt}|/${1}/|g" 262 fi 263 fi 264 done 265 shift 266 done 267 done 268fi 269 270# Construct a sed pattern which will convert option names to OS directory 271# names. 272toosdirnames= 273defaultosdirname= 274defaultosdirname2= 275if [ -n "${multiarch}" ]; then 276 defaultosdirname=::${multiarch} 277fi 278if [ -n "${osdirnames}" ]; then 279 set x ${osdirnames} 280 shift 281 while [ $# != 0 ] ; do 282 case "$1" in 283 .=*) 284 defaultosdirname=`echo $1 | sed 's|^.=|:|'` 285 if [ -n "${multiarch}" ]; then 286 defaultosdirname=${defaultosdirname}:${multiarch} 287 fi 288 case "$defaultosdirname" in 289 ::*) ;; 290 *) 291 defaultosdirname2=${defaultosdirname} 292 defaultosdirname= 293 ;; 294 esac 295 shift 296 ;; 297 *=*) 298 patt=`echo $1 | sed -e 's|=|/$=/|'` 299 toosdirnames="${toosdirnames} -e s=^/${patt}/=" 300 shift 301 ;; 302 *) 303 break 304 ;; 305 esac 306 done 307 308 if [ $# != 0 ]; then 309 for set in ${options}; do 310 for opts in `echo ${set} | sed -e 's|/| |'g`; do 311 patt="/" 312 for opt in `echo ${opts} | sed -e 's_|_ _'g`; do 313 if [ "$1" != "${opt}" ]; then 314 toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g" 315 patt="${patt}${1}/" 316 if [ "${patt}" != "/${1}/" ]; then 317 toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g" 318 fi 319 fi 320 done 321 shift 322 done 323 done 324 fi 325fi 326 327# We need another recursive shell script to correctly handle positive 328# matches. If we are invoked as 329# genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2" 330# we must output 331# opt1/opt2 opt1 opt2 332# opt1/opt2 nopt1 opt2 333# opt1/opt2 opt1 nopt2 334# opt1/opt2 nopt1 nopt2 335# In other words, we must output all combinations of matches. 336rm -f tmpmultilib2 337cat >tmpmultilib2 <<EOF 338#!${CONFIG_SHELL:-/bin/sh} 339EOF 340cat >>tmpmultilib2 <<\EOF 341# The positional parameters are a list of matches to consider. 342# ${dirout} is the directory name and ${optout} is the current list of 343# options. 344if [ "$#" = "0" ]; then 345 echo "\"${dirout} ${optout};\"," 346else 347 first=$1 348 shift 349 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@ 350 l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'` 351 r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'` 352 if expr " ${optout} " : ".* ${l} .*" > /dev/null; then 353 newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'` 354 dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@ 355 fi 356fi 357EOF 358chmod +x tmpmultilib2 359 360# Start with the current directory, which includes only negations. 361optout= 362for set in ${options}; do 363 for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do 364 optout="${optout} !${opt}" 365 done 366done 367optout=`echo ${optout} | sed -e 's/^ //'` 368echo "\".${defaultosdirname} ${optout};\"," 369[ -n "${defaultosdirname2}" ] && echo "\".${defaultosdirname2} ${optout};\"," 370 371# This part of code convert an option combination to 372# its corresponding directory names. 373# The directory names will be deduced from MULTILIB_DIRNAMES, 374# MULTILIB_OSDIRNAMES or the option combination itself. 375rm -rf tmpmultilib3 376cat >tmpmultilib3 <<\EOF 377#!/bin/sh 378 379dirout= 380combo=$1 381todirnames=$2 382toosdirnames=$3 383enable_multilib=$4 384 385if [ -n "${todirnames}" ]; then 386 dirout=`echo ${combo} | sed ${todirnames}` 387else 388 dirout=`echo ${combo} | sed -e 's/=/-/g'` 389fi 390# Remove the leading and trailing slashes. 391dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` 392 393# Use the OS directory names rather than the option names. 394if [ -n "${toosdirnames}" ]; then 395 osdirout=`echo ${combo} | sed ${toosdirnames}` 396 # Remove the leading and trailing slashes. 397 osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` 398 if [ "x${enable_multilib}" != xyes ]; then 399 dirout=".:${osdirout}" 400 disable_multilib=yes 401 else 402 case "${osdirout}" in 403 !*) 404 dirout=`echo ${osdirout} | sed 's/^!//'` 405 ;; 406 *) 407 dirout="${dirout}:${osdirout}" 408 ;; 409 esac 410 fi 411else 412 if [ "x${enable_multilib}" != xyes ]; then 413 # genmultilib with --disable-multilib should be 414 # called with '' '' '' '' '' '' '' no 415 # if MULTILIB_OSDIRNAMES is empty. 416 exit 1 417 fi 418fi 419echo "${dirout}" 420EOF 421chmod +x tmpmultilib3 422 423# Script to look through the options and output each option that is present, 424# and negate each option that is not present. 425rm -rf tmpmultilib4 426cat > tmpmultilib4 <<\EOF 427#!/bin/sh 428 429optout= 430combo=$1 431options=$2 432 433for set in ${options}; do 434 setopts=`echo ${set} | sed -e 's_[/|]_ _g'` 435 for opt in ${setopts}; do 436 if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then 437 optout="${optout} ${opt}" 438 else 439 optout="${optout} !${opt}" 440 fi 441 done 442done 443optout=`echo ${optout} | sed -e 's/^ //'` 444echo "${optout}" 445EOF 446chmod +x tmpmultilib4 447 448# Work over the list of combinations. We have to translate each one 449# to use the directory names rather than the option names, we have to 450# include the information in matches, and we have to generate the 451# correct list of options and negations. 452for combo in ${combinations}; do 453 # Use the directory names rather than the option names. 454 dirout=`./tmpmultilib3 "${combo}" "${todirnames}" "${toosdirnames}" "${enable_multilib}"` 455 456 # Look through the options. We must output each option that is 457 # present, and negate each option that is not present. 458 optout=`./tmpmultilib4 "${combo}" "${options}"` 459 460 # Output the line with all appropriate matches. 461 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 462done 463 464# Terminate the list of string. 465echo "NULL" 466echo "};" 467 468# Generate a regular expression to validate option combinations. 469options_re= 470for set in ${options}; do 471 for opt in `echo ${set} | sed -e 's_[/|]_ _g' -e 's/+/./g' `; do 472 options_re="${options_re}${options_re:+|}${opt}" 473 done 474done 475options_re="^/((${options_re})/)*\$" 476 477# Output rules used for multilib reuse. 478echo "" 479echo "static const char *const multilib_reuse_raw[] = {" 480for rrule in ${multilib_reuse}; do 481 # The left part of the rule are the options we used to build multilib. 482 # The right part of the rule are the options that can reuse this multilib. 483 combo=`echo ${rrule} | sed -e 's/=.*$//' -e 's/\([^\\]\)\./\1=/g' -e 's/\\\././g'` 484 copts=`echo ${rrule} | sed -e 's/^.*=//' -e 's/\([^\\]\)\./\1=/g' -e 's/\\\././g'` 485 # The variable ${combinations} are the option combinations we will build 486 # multilib from. If the combination in the left part of reuse rule isn't 487 # in this variable, it means no multilib will be built for current reuse 488 # rule. Thus the reuse purpose specified by current rule is meaningless. 489 if expr "${combinations} " : ".*/${combo}/.*" > /dev/null; then 490 if echo "/${copts}/" | grep -E "${options_re}" > /dev/null; then 491 combo="/${combo}/" 492 dirout=`./tmpmultilib3 "${combo}" "${todirnames}" "${toosdirnames}" "${enable_multilib}"` 493 copts="/${copts}/" 494 optout=`./tmpmultilib4 "${copts}" "${options}"` 495 # Output the line with all appropriate matches. 496 dirout="${dirout}" optout="${optout}" ./tmpmultilib2 497 else 498 echo "The rule ${rrule} contains an option absent from MULTILIB_OPTIONS." >&2 499 exit 1 500 fi 501 else 502 echo "The rule ${rrule} is trying to reuse nonexistent multilib." >&2 503 exit 1 504 fi 505done 506 507# Terminate the list of string. 508echo "NULL" 509echo "};" 510 511# Output all of the matches now as option and that is the same as that, with 512# a semicolon trailer. Include all of the normal options as well. 513# Note, the format of the matches is reversed compared 514# to what we want, so switch them around. 515echo "" 516echo "static const char *const multilib_matches_raw[] = {" 517for match in ${matches}; do 518 l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'` 519 r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'` 520 echo "\"${r} ${l};\"," 521done 522for set in ${options}; do 523 for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do 524 echo "\"${opt} ${opt};\"," 525 done 526done 527echo "NULL" 528echo "};" 529 530# Output the default options now 531echo "" 532echo "static const char *multilib_extra = \"${extra}\";" 533 534# Output the exclusion rules now 535echo "" 536echo "static const char *const multilib_exclusions_raw[] = {" 537for rule in ${exclusions}; do 538 s=`echo ${rule} | sed -e 's,/, ,g'` 539 echo "\"${s};\"," 540done 541echo "NULL" 542echo "};" 543 544# Output the options now 545moptions=`echo ${options} | sed -e 's,[ ][ ]*, ,g'` 546echo "" 547echo "static const char *multilib_options = \"${moptions}\";" 548 549# Finally output the disable flag if specified 550if [ "x${disable_multilib}" = xyes ]; then 551 echo "" 552 echo "#define DISABLE_MULTILIB 1" 553fi 554 555cd .. 556rm -r tmpmultilib.$$ 557 558exit 0 559