d4691e641b
non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
232 lines
8.0 KiB
Bash
232 lines
8.0 KiB
Bash
#!/bin/sh
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# Generates multilib.h.
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# Copyright (C) 1994, 1995 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 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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# #define MULTILIB_SELECT "\
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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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# 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 ${options}`
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rm -f tmpmultilib
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# Construct a sed pattern which will convert option names to directory
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# names.
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todirnames=
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if [ -n "${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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# Construct a sed pattern which will add negations based on the
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# matches. The semicolons are easier than getting the shell to accept
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# quoted spaces when expanding a variable.
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matchnegations=
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for i in ${matches}; do
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l=`echo $i | sed -e 's/=.*$//' -e 's/?/=/g'`
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r=`echo $i | sed -e 's/^.*=//' -e 's/?/=/g'`
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matchnegations="${matchnegations} -e s/;!${l};/;!${l};!${r};/"
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done
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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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# We are ready to start output.
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echo '#define MULTILIB_SELECT "\'
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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 ${optout} | sed -e 's/^ //'`
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if [ -n "${matchnegations}" ]; then
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optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'`
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fi
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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 ${optout} | sed -e 's/^ //'`
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# Add any negations of matches.
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if [ -n "${matchnegations}" ]; then
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optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'`
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fi
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# Output the line with all appropriate matches.
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dirout="${dirout}" optout="${optout}" ./tmpmultilib2 ${matches}
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done
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rm -f tmpmultilib2
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# That's it.
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echo '"'
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exit 0
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