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#!/bin/sh

# Generates multilib.h.

#   Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002, 2007

#   Free Software Foundation, Inc.

#This file is part of GCC.

#GCC is free software; you can redistribute it and/or modify it under

#the terms of the GNU General Public License as published by the Free

#Software Foundation; either version 3, or (at your option) any later

#version.

#GCC is distributed in the hope that it will be useful, but WITHOUT

#ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

#FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

#for more details.

#You should have received a copy of the GNU General Public License

#along with GCC; see the file COPYING3.  If not see

#.

# This shell script produces a header file which the gcc driver

# program uses to pick which library to use based on the machine

# specific options that it is given.

# The first argument is a list of sets of options.  The elements in

# the list are separated by spaces.  Within an element, the options

# are separated by slashes or pipes.  No leading dash is used on the

# options.

# Each option in a set separated by slashes is mutually incompatible

# with all other options

# in the set.

# Each option in a set separated by pipes will be used for the library

# compilation and any of the options in the set will be sufficient

# for it to be triggered.

# The optional second argument is a list of subdirectory names.  If

# the second argument is non-empty, there must be as many elements in

# the second argument as there are options in the first argument.  The

# elements in the second list are separated by spaces.  If the second

# argument is empty, the option names will be used as the directory

# names.

# The optional third argument is a list of options which are

# identical.  The elements in the list are separated by spaces.  Each

# element must be of the form OPTION=OPTION.  The first OPTION should

# appear in the first argument, and the second should be a synonym for

# it.  Question marks are replaced with equal signs in both options.

# The optional fourth argument is a list of multilib directory

# combinations that should not be built.

# The optional fifth argument is a list of options that should be

# used whenever building multilib libraries.

# The optional sixth argument is a list of exclusions used internally by

# the compiler similar to exceptions. The difference being that exclusions

# allow matching default options that genmultilib does not know about and

# is done at runtime as opposed to being sorted out at compile time.

# Each element in the list is a separate exclusion rule. Each rule is

# a list of options (sans preceding '-') separated by a '/'. The options

# on the rule are grouped as an AND operation, and all options much match

# for the rule to exclude a set. Options can be preceded with a '!' to

# match a logical NOT.

# The optional seventh argument is a list of OS subdirectory names.

# The format is either the same as of the second argument, or a set of

# mappings. When it is the same as the second argument, it describes

# the multilib directories using OS conventions, rather than GCC

# conventions.  When it is a set of mappings of the form gccdir=osdir,

# the left side gives the GCC convention and the right gives the

# equivalent OS defined location.  If the osdir part begins with a !,

# the os directory names are used exclusively.  Use the mapping when

# there is no one-to-one equivalence between GCC levels and the OS.

# The last option should be "yes" if multilibs are enabled.  If it is not

# "yes", all GCC multilib dir names will be ".".

# The output looks like

#   #define MULTILIB_MATCHES "\

#   SUBDIRECTORY OPTIONS;\

#   ...

#   "

# The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are

# multiple options separated by spaces.  Each option may start with an

# exclamation point.  gcc will consider each line in turn.  If none of

# the options beginning with an exclamation point are present, and all

# of the other options are present, that subdirectory will be used.

# The order of the subdirectories is such that they can be created in

# order; that is, a subdirectory is preceded by all its parents.

# Here is an example (this is from the actual sparc64 case):

#   genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'

#               'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'

#               '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'

#               '../lib64 ../lib32 alt' yes

# This produces:

#   ". !m64 !m32 !mno-app-regs !mcmodel=medany;",

#   "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;",

#   "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;",

#   "alt !m64 !m32 mno-app-regs mcmodel=medany;",

#   "alt !m64 !m32 mno-app-regs !mcmodel=medany;",

#   "alt !m64 !m32 !mno-app-regs mcmodel=medany;",

#   "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;",

#   "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;",

#   "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;",

#

# The effect is that `gcc -mno-app-regs' (for example) will append "alt"

# to the directory name when searching for libraries or startup files and

# `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note

# that exclusion above is moot, unless the compiler had a default of -m32,

# which would mean that all of the "alt" directories (not the 64/alt ones)

# would be ignored (not generated, nor used) since the exclusion also

# matches the multilib_default args.

# Copy the positional parameters into variables.

options=$1

dirnames=$2

matches=$3

exceptions=$4

extra=$5

exclusions=$6

osdirnames=$7

enable_multilib=$8

echo "static const char *const multilib_raw[] = {"

mkdir tmpmultilib.$$ || exit 1

# Use cd ./foo to avoid CDPATH output.

cd ./tmpmultilib.$$ || exit 1

# What we want to do is select all combinations of the sets in

# options.  Each combination which includes a set of mutually

# exclusive options must then be output multiple times, once for each

# item in the set.  Selecting combinations is a recursive process.

# Since not all versions of sh support functions, we achieve recursion

# by creating a temporary shell script which invokes itself.

rm -f tmpmultilib

cat >tmpmultilib <<\EOF

#!/bin/sh

# This recursive script basically outputs all combinations of its

# input arguments, handling mutually exclusive sets of options by

# repetition.  When the script is called, ${initial} is the list of

# options which should appear before all combinations this will

# output.  The output looks like a list of subdirectory names with

# leading and trailing slashes.

if [ "$#" != "0" ]; then

  first=$1

  shift

  case "$first" in

  *\|*)

    all=${initial}`echo $first | sed -e 's_|_/_'g`

    first=`echo $first | sed -e 's_|_ _'g`

    echo ${all}/

    initial="${initial}${all}/" ./tmpmultilib $@

    ./tmpmultilib $first $@ | grep -v "^${all}"

    ;;

  *)

    for opt in `echo $first | sed -e 's|/| |'g`; do

      echo ${initial}${opt}/

    done

    ./tmpmultilib $@

    for opt in `echo $first | sed -e 's|/| |'g`; do

      initial="${initial}${opt}/" ./tmpmultilib $@

    done

  esac

fi

EOF

chmod +x tmpmultilib

combinations=`initial=/ ./tmpmultilib ${options}`

# If there exceptions, weed them out now

if [ -n "${exceptions}" ]; then

  cat >tmpmultilib2 <<\EOF

#!/bin/sh

# This recursive script weeds out any combination of multilib

# switches that should not be generated.  The output looks like

# a list of subdirectory names with leading and trailing slashes.

  for opt in $@; do

    case "$opt" in

EOF

  for except in ${exceptions}; do

    echo "      /${except}/) : ;;" >> tmpmultilib2

  done

cat >>tmpmultilib2 <<\EOF

      *) echo ${opt};;

    esac

  done

EOF

  chmod +x tmpmultilib2

  combinations=`./tmpmultilib2 ${combinations}`

fi

# Construct a sed pattern which will convert option names to directory

# names.

todirnames=

if [ -n "${dirnames}" ]; then

  set x ${dirnames}

  shift

  for set in ${options}; do

    for opts in `echo ${set} | sed -e 's|/| |'g`; do

      patt="/"

      for opt in `echo ${opts} | sed -e 's_|_ _'g`; do

        if [ "$1" != "${opt}" ]; then

          todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"

          patt="${patt}${1}/"

          if [ "${patt}" != "/${1}/" ]; then

            todirnames="${todirnames} -e s|${patt}|/${1}/|g"

          fi

        fi

      done

      shift

    done

  done

fi

# Construct a sed pattern which will convert option names to OS directory

# names.

toosdirnames=

defaultosdirname=

if [ -n "${osdirnames}" ]; then

  set x ${osdirnames}

  shift

  while [ $# != 0 ] ; do

    case "$1" in

      .=*)

        defaultosdirname=`echo $1 | sed 's|^.=|:|'`

        shift

        ;;

      *=*)

        patt=`echo $1 | sed -e 's|=|/$=/|'`

        toosdirnames="${toosdirnames} -e s=^/${patt}/="

        shift

        ;;

      *)

        break

        ;;

    esac

  done

  if [ $# != 0 ]; then

    for set in ${options}; do

      for opts in `echo ${set} | sed -e 's|/| |'g`; do

        patt="/"

        for opt in `echo ${opts} | sed -e 's_|_ _'g`; do

          if [ "$1" != "${opt}" ]; then

            toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"

            patt="${patt}${1}/"

            if [ "${patt}" != "/${1}/" ]; then

              toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"

            fi

          fi

        done

        shift

      done

    done

  fi

fi

# We need another recursive shell script to correctly handle positive

# matches.  If we are invoked as

#   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"

# we must output

#   opt1/opt2 opt1 opt2

#   opt1/opt2 nopt1 opt2

#   opt1/opt2 opt1 nopt2

#   opt1/opt2 nopt1 nopt2

# In other words, we must output all combinations of matches.

rm -f tmpmultilib2

cat >tmpmultilib2 <<\EOF

#!/bin/sh

# The positional parameters are a list of matches to consider.

# ${dirout} is the directory name and ${optout} is the current list of

# options.

if [ "$#" = "0" ]; then

  echo "\"${dirout} ${optout};\","

else

  first=$1

  shift

  dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@

  l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`

  r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`

  if expr " ${optout} " : ".* ${l} .*" > /dev/null; then

    newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`

    dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@

  fi

fi

EOF

chmod +x tmpmultilib2

# Start with the current directory, which includes only negations.

optout=

for set in ${options}; do

  for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do

    optout="${optout} !${opt}"

  done

done

optout=`echo ${optout} | sed -e 's/^ //'`

echo "\".${defaultosdirname} ${optout};\","

# Work over the list of combinations.  We have to translate each one

# to use the directory names rather than the option names, we have to

# include the information in matches, and we have to generate the

# correct list of options and negations.

for combo in ${combinations}; do

  # Use the directory names rather than the option names.

  if [ -n "${todirnames}" ]; then

    dirout=`echo ${combo} | sed ${todirnames}`

  else

    dirout=`echo ${combo} | sed -e 's/=/-/g'`

  fi

  # Remove the leading and trailing slashes.

  dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`

  # Use the OS directory names rather than the option names.

  if [ -n "${toosdirnames}" ]; then

    osdirout=`echo ${combo} | sed ${toosdirnames}`

    # Remove the leading and trailing slashes.

    osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/$||g'`

    if [ "x${enable_multilib}" != xyes ]; then

      dirout=".:${osdirout}"

      disable_multilib=yes

    else

      case "${osdirout}" in

        !*)

          dirout=`echo ${osdirout} | sed 's/^!//'`

          ;;

        *)

          dirout="${dirout}:${osdirout}"

          ;;

      esac

    fi

  else

    if [ "x${enable_multilib}" != xyes ]; then

      # genmultilib with --disable-multilib should be

      # called with '' '' '' '' '' '' '' no

      # if MULTILIB_OSDIRNAMES is empty.

      exit 1

    fi

  fi

  # Look through the options.  We must output each option that is

  # present, and negate each option that is not present.

  optout=

  for set in ${options}; do

    setopts=`echo ${set} | sed -e 's_[/|]_ _g'`

    for opt in ${setopts}; do

      if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then

        optout="${optout} ${opt}"

      else

        optout="${optout} !${opt}"

      fi

    done

  done

  optout=`echo ${optout} | sed -e 's/^ //'`

  # Output the line with all appropriate matches.

  dirout="${dirout}" optout="${optout}" ./tmpmultilib2

done

# Terminate the list of string.

echo "NULL"

echo "};"

# Output all of the matches now as option and that is the same as that, with

# a semicolon trailer.  Include all of the normal options as well.

# Note, the format of the matches is reversed compared

# to what we want, so switch them around.

echo ""

echo "static const char *const multilib_matches_raw[] = {"

for match in ${matches}; do

  l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`

  r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`

  echo "\"${r} ${l};\","

done

for set in ${options}; do

  for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do

    echo "\"${opt} ${opt};\","

  done

done

echo "NULL"

echo "};"

# Output the default options now

echo ""

echo "static const char *multilib_extra = \"${extra}\";"

# Output the exclusion rules now

echo ""

echo "static const char *const multilib_exclusions_raw[] = {"

for rule in ${exclusions}; do

  s=`echo ${rule} | sed -e 's,/, ,g'`

  echo "\"${s};\","

done

echo "NULL"

echo "};"

# Output the options now

moptions=`echo ${options} | sed -e 's,[         ][      ]*, ,g'`

echo ""

echo "static const char *multilib_options = \"${moptions}\";"

# Finally output the disable flag if specified

if [ "x${disable_multilib}" = xyes ]; then

  echo ""

  echo "#define DISABLE_MULTILIB  1"

fi

cd ..

rm -r tmpmultilib.$$

exit 0