270 lines
8.8 KiB
Bash
270 lines
8.8 KiB
Bash
#!/bin/sh
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# Generates multilib.h.
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# Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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#This file is part of GNU CC.
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#GNU CC is free software; you can redistribute it and/or modify
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#it under the terms of the GNU General Public License as published by
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#the Free Software Foundation; either version 2, or (at your option)
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#any later version.
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#GNU CC is distributed in the hope that it will be useful,
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#but WITHOUT ANY WARRANTY; without even the implied warranty of
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#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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#GNU General Public License for more details.
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#You should have received a copy of the GNU General Public License
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#along with GNU CC; see the file COPYING. If not, write to
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#the Free Software Foundation, 59 Temple Place - Suite 330,
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#Boston, MA 02111-1307, USA.
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# This shell script produces a header file which the gcc driver
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# program uses to pick which library to use based on the machine
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# specific options that it is given.
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# The first argument is a list of sets of options. The elements in
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# the list are separated by spaces. Within an element, the options
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# are separated by slashes. No leading dash is used on the options.
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# Each option in a set is mutually incompatible with all other options
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# in the set.
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# The optional second argument is a list of subdirectory names. If
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# the second argument is non-empty, there must be as many elements in
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# the second argument as there are options in the first argument. The
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# elements in the second list are separated by spaces. If the second
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# argument is empty, the option names will be used as the directory
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# names.
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# The optional third argument is a list of options which are
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# identical. The elements in the list are separated by spaces. Each
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# element must be of the form OPTION=OPTION. The first OPTION should
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# appear in the first argument, and the second should be a synonym for
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# it. Question marks are replaced with equal signs in both options.
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# The optional fourth argument is a list of multilib directory
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# combinations that should not be built.
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# The optional fifth argument is a list of options that should be
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# used whenever building multilib libraries.
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# The output looks like
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# #define MULTILIB_MATCHES "\
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# SUBDIRECTORY OPTIONS;\
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# ...
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# "
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# The SUBDIRECTORY is the subdirectory to use. The OPTIONS are
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# multiple options separated by spaces. Each option may start with an
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# exclamation point. gcc will consider each line in turn. If none of
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# the options beginning with an exclamation point are present, and all
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# of the other options are present, that subdirectory will be used.
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# The order of the subdirectories is such that they can be created in
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# order; that is, a subdirectory is preceded by all its parents.
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# Here is a example (this is simplified from the actual 680x0 case):
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# genmultilib "m68000/m68020 msoft-float" "m68000 m68020 msoft-float"
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# "m68000=mc68000"
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# This produces:
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# ". !m68000 !mc68000 !m68020 !msoft-float;",
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# "m68000 m68000 !m68020 !msoft-float;",
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# "m68000 mc60000 !m68020 !msoft-float;",
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# "m68020 !m68000 !mc68000 m68020 !msoft-float;",
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# "msoft-float !m68000 !mc68000 !m68020 msoft-float;",
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# "m68000/msoft-float m68000 !m68020 msoft-float;",
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# "m68000/msoft-float mc68000 !m68020 msoft-float;",
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# "m68020/msoft-float !m68000 !mc68000 m68020 msoft-float;",
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#
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# The effect is that `gcc -msoft-float' (for example) will append
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# msoft-float to the directory name when searching for libraries or
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# startup files, and `gcc -m68000 -msoft-float' (for example) will
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# append m68000/msoft-float.
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# Copy the positional parameters into variables.
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options=$1
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dirnames=$2
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matches=$3
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exceptions=$4
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extra=$5
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echo "static char *multilib_raw[] = {"
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# What we want to do is select all combinations of the sets in
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# options. Each combination which includes a set of mutually
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# exclusive options must then be output multiple times, once for each
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# item in the set. Selecting combinations is a recursive process.
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# Since not all versions of sh support functions, we achieve recursion
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# by creating a temporary shell script which invokes itself.
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rm -f tmpmultilib
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cat >tmpmultilib <<\EOF
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#!/bin/sh
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# This recursive script basically outputs all combinations of its
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# input arguments, handling mutually exclusive sets of options by
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# repetition. When the script is called, ${initial} is the list of
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# options which should appear before all combinations this will
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# output. The output looks like a list of subdirectory names with
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# leading and trailing slashes.
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if [ "$#" != "0" ]; then
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first=$1
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shift
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for opt in `echo $first | sed -e 's|/| |'g`; do
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echo ${initial}${opt}/
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done
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./tmpmultilib $@
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for opt in `echo $first | sed -e 's|/| |'g`; do
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initial="${initial}${opt}/" ./tmpmultilib $@
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done
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fi
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EOF
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chmod +x tmpmultilib
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combinations=`initial=/ ./tmpmultilib ${options}`
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rm -f tmpmultilib
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# If there exceptions, weed them out now
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if [ -n "${exceptions}" ]; then
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rm -f tmpmultilib2
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cat >tmpmultilib2 <<\EOF
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#!/bin/sh
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# This recursive script weeds out any combination of multilib
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# switches that should not be generated. The output looks like
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# a list of subdirectory names with leading and trailing slashes.
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for opt in $@; do
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case "$opt" in
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EOF
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for except in ${exceptions}; do
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echo " /${except}/) : ;;" >> tmpmultilib2
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done
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cat >>tmpmultilib2 <<\EOF
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*) echo ${opt};;
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esac
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done
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EOF
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chmod +x tmpmultilib2
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combinations=`./tmpmultilib2 ${combinations}`
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rm -f ./tmpmultilib2
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fi
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# Construct a sed pattern which will convert option names to directory
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# names.
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todirnames=
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if [ -n "${dirnames}" ]; then
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set x ${dirnames}
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shift
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for set in ${options}; do
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for opt in `echo ${set} | sed -e 's|/| |'g`; do
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if [ "$1" != "${opt}" ]; then
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todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
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fi
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shift
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done
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done
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fi
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# We need another recursive shell script to correctly handle positive
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# matches. If we are invoked as
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# genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
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# we must output
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# opt1/opt2 opt1 opt2
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# opt1/opt2 nopt1 opt2
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# opt1/opt2 opt1 nopt2
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# opt1/opt2 nopt1 nopt2
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# In other words, we must output all combinations of matches.
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rm -f tmpmultilib2
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cat >tmpmultilib2 <<\EOF
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#!/bin/sh
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# The positional parameters are a list of matches to consider.
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# ${dirout} is the directory name and ${optout} is the current list of
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# options.
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if [ "$#" = "0" ]; then
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echo "\"${dirout} ${optout};\","
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else
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first=$1
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shift
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dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
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l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
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r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
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if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
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newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
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dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
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fi
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fi
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EOF
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chmod +x tmpmultilib2
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# Start with the current directory, which includes only negations.
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optout=
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for set in ${options}; do
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for opt in `echo ${set} | sed -e 's|/| |'g`; do
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optout="${optout} !${opt}"
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done
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done
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optout=`echo ${optout} | sed -e 's/^ //'`
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echo "\". ${optout};\","
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# Work over the list of combinations. We have to translate each one
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# to use the directory names rather than the option names, we have to
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# include the information in matches, and we have to generate the
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# correct list of options and negations.
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for combo in ${combinations}; do
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# Use the directory names rather than the option names.
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if [ -n "${todirnames}" ]; then
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dirout=`echo ${combo} | sed ${todirnames}`
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else
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dirout=${combo}
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fi
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# Remove the leading and trailing slashes.
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dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
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# Look through the options. We must output each option that is
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# present, and negate each option that is not present.
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optout=
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for set in ${options}; do
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setopts=`echo ${set} | sed -e 's|/| |g'`
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for opt in ${setopts}; do
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if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
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optout="${optout} ${opt}"
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else
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optout="${optout} !${opt}"
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fi
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done
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done
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optout=`echo ${optout} | sed -e 's/^ //'`
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# Output the line with all appropriate matches.
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dirout="${dirout}" optout="${optout}" ./tmpmultilib2
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done
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# Terminate the list of string.
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echo "NULL"
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echo "};"
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# Output all of the matches now as option and that is the same as that, with
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# a semicolon trailer. Include all of the normal options as well.
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# Note, the format of the matches is reversed compared
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# to what we want, so switch them around.
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echo ""
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echo "static char *multilib_matches_raw[] = {"
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for match in ${matches}; do
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l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
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r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
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echo "\"${r} ${l};\","
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done
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for set in ${options}; do
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for opt in `echo ${set} | sed -e 's|/| |'g`; do
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echo "\"${opt} ${opt};\","
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done
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done
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echo "NULL"
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echo "};"
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# Output the default options now
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echo ""
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echo "static char *multilib_extra = \"${extra}\";"
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rm -f tmpmultilib2
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exit 0
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