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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/genmultilib
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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
+#<http://www.gnu.org/licenses/>.
+
+# 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 optional eighth argument is the multiarch name.
+
+# 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
+multiarch=$8
+enable_multilib=$9
+
+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 "${multiarch}" ]; then
+ defaultosdirname=::${multiarch}
+fi
+if [ -n "${osdirnames}" ]; then
+ set x ${osdirnames}
+ shift
+ while [ $# != 0 ] ; do
+ case "$1" in
+ .=*)
+ defaultosdirname=`echo $1 | sed 's|^.=|:|'`
+ if [ -n "${multiarch}" ]; then
+ defaultosdirname=${defaultosdirname}:${multiarch}
+ fi
+ 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 ${dirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||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 ${osdirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||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