417 lines
14 KiB
Bash
417 lines
14 KiB
Bash
#!/bin/sh
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# Generates multilib.h.
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# Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002, 2007
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# Free Software Foundation, Inc.
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#This file is part of GCC.
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#GCC is free software; you can redistribute it and/or modify it under
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#the terms of the GNU General Public License as published by the Free
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#Software Foundation; either version 3, or (at your option) any later
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#version.
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#GCC is distributed in the hope that it will be useful, but WITHOUT
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#ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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#FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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#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 GCC; see the file COPYING3. If not see
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#<http://www.gnu.org/licenses/>.
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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 or pipes. No leading dash is used on the
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# options.
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# Each option in a set separated by slashes is mutually incompatible
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# with all other options
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# in the set.
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# Each option in a set separated by pipes will be used for the library
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# compilation and any of the options in the set will be sufficient
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# for it to be triggered.
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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 optional sixth argument is a list of exclusions used internally by
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# the compiler similar to exceptions. The difference being that exclusions
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# allow matching default options that genmultilib does not know about and
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# is done at runtime as opposed to being sorted out at compile time.
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# Each element in the list is a separate exclusion rule. Each rule is
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# a list of options (sans preceding '-') separated by a '/'. The options
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# on the rule are grouped as an AND operation, and all options much match
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# for the rule to exclude a set. Options can be preceded with a '!' to
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# match a logical NOT.
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# The optional seventh argument is a list of OS subdirectory names.
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# The format is either the same as of the second argument, or a set of
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# mappings. When it is the same as the second argument, it describes
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# the multilib directories using OS conventions, rather than GCC
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# conventions. When it is a set of mappings of the form gccdir=osdir,
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# the left side gives the GCC convention and the right gives the
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# equivalent OS defined location. If the osdir part begins with a !,
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# the os directory names are used exclusively. Use the mapping when
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# there is no one-to-one equivalence between GCC levels and the OS.
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# The last option should be "yes" if multilibs are enabled. If it is not
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# "yes", all GCC multilib dir names will be ".".
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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 an example (this is from the actual sparc64 case):
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# genmultilib 'm64/m32 mno-app-regs|mcmodel=medany' '64 32 alt'
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# 'mcmodel?medany=mcmodel?medmid' 'm32/mno-app-regs* m32/mcmodel=*'
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# '' 'm32/!m64/mno-app-regs m32/!m64/mcmodel=medany'
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# '../lib64 ../lib32 alt' yes
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# This produces:
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# ". !m64 !m32 !mno-app-regs !mcmodel=medany;",
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# "64:../lib64 m64 !m32 !mno-app-regs !mcmodel=medany;",
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# "32:../lib32 !m64 m32 !mno-app-regs !mcmodel=medany;",
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# "alt !m64 !m32 mno-app-regs mcmodel=medany;",
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# "alt !m64 !m32 mno-app-regs !mcmodel=medany;",
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# "alt !m64 !m32 !mno-app-regs mcmodel=medany;",
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# "64/alt:../lib64/alt m64 !m32 mno-app-regs mcmodel=medany;",
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# "64/alt:../lib64/alt m64 !m32 mno-app-regs !mcmodel=medany;",
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# "64/alt:../lib64/alt m64 !m32 !mno-app-regs mcmodel=medany;",
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#
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# The effect is that `gcc -mno-app-regs' (for example) will append "alt"
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# to the directory name when searching for libraries or startup files and
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# `gcc -m32 -mcmodel=medany' (for example) will append "32/alt". Also note
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# that exclusion above is moot, unless the compiler had a default of -m32,
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# which would mean that all of the "alt" directories (not the 64/alt ones)
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# would be ignored (not generated, nor used) since the exclusion also
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# matches the multilib_default args.
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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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exclusions=$6
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osdirnames=$7
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enable_multilib=$8
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echo "static const char *const multilib_raw[] = {"
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mkdir tmpmultilib.$$ || exit 1
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# Use cd ./foo to avoid CDPATH output.
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cd ./tmpmultilib.$$ || exit 1
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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=$1
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shift
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case "$first" in
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*\|*)
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all=${initial}`echo $first | sed -e 's_|_/_'g`
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first=`echo $first | sed -e 's_|_ _'g`
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echo ${all}/
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initial="${initial}${all}/" ./tmpmultilib $@
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./tmpmultilib $first $@ | grep -v "^${all}"
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;;
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*)
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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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esac
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fi
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EOF
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chmod +x tmpmultilib
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combinations=`initial=/ ./tmpmultilib ${options}`
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# If there exceptions, weed them out now
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if [ -n "${exceptions}" ]; then
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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 ${combinations}`
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fi
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# Construct a sed pattern which will convert option names to directory
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# names.
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todirnames=
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if [ -n "${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 opts in `echo ${set} | sed -e 's|/| |'g`; do
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patt="/"
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for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
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if [ "$1" != "${opt}" ]; then
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todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
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patt="${patt}${1}/"
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if [ "${patt}" != "/${1}/" ]; then
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todirnames="${todirnames} -e s|${patt}|/${1}/|g"
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fi
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fi
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done
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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 convert option names to OS directory
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# names.
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toosdirnames=
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defaultosdirname=
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if [ -n "${osdirnames}" ]; then
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set x ${osdirnames}
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shift
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while [ $# != 0 ] ; do
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case "$1" in
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.=*)
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defaultosdirname=`echo $1 | sed 's|^.=|:|'`
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shift
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;;
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*=*)
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patt=`echo $1 | sed -e 's|=|/$=/|'`
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toosdirnames="${toosdirnames} -e s=^/${patt}/="
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shift
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;;
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*)
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break
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;;
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esac
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done
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if [ $# != 0 ]; then
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for set in ${options}; do
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for opts in `echo ${set} | sed -e 's|/| |'g`; do
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patt="/"
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for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
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if [ "$1" != "${opt}" ]; then
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toosdirnames="${toosdirnames} -e s|/${opt}/|/${1}/|g"
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patt="${patt}${1}/"
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if [ "${patt}" != "/${1}/" ]; then
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toosdirnames="${toosdirnames} -e s|${patt}|/${1}/|g"
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fi
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fi
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done
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shift
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done
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done
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fi
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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 ${optout} | sed -e 's/^ //'`
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echo "\".${defaultosdirname} ${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=`echo ${combo} | sed -e 's/=/-/g'`
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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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# Use the OS directory names rather than the option names.
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if [ -n "${toosdirnames}" ]; then
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osdirout=`echo ${combo} | sed ${toosdirnames}`
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# Remove the leading and trailing slashes.
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osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/$||g'`
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if [ "x${enable_multilib}" != xyes ]; then
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dirout=".:${osdirout}"
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disable_multilib=yes
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else
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case "${osdirout}" in
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!*)
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dirout=`echo ${osdirout} | sed 's/^!//'`
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;;
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*)
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dirout="${dirout}:${osdirout}"
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;;
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esac
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fi
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else
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if [ "x${enable_multilib}" != xyes ]; then
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# genmultilib with --disable-multilib should be
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# called with '' '' '' '' '' '' '' no
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# if MULTILIB_OSDIRNAMES is empty.
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exit 1
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fi
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fi
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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 const char *const 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} ${opt};\","
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done
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done
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echo "NULL"
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echo "};"
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# Output the default options now
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echo ""
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echo "static const char *multilib_extra = \"${extra}\";"
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# Output the exclusion rules now
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echo ""
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echo "static const char *const multilib_exclusions_raw[] = {"
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for rule in ${exclusions}; do
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s=`echo ${rule} | sed -e 's,/, ,g'`
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echo "\"${s};\","
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done
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echo "NULL"
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echo "};"
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# Output the options now
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moptions=`echo ${options} | sed -e 's,[ ][ ]*, ,g'`
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echo ""
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echo "static const char *multilib_options = \"${moptions}\";"
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# Finally output the disable flag if specified
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if [ "x${disable_multilib}" = xyes ]; then
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echo ""
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echo "#define DISABLE_MULTILIB 1"
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fi
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cd ..
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rm -r tmpmultilib.$$
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exit 0
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