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#! /bin/sh

# Copyright (C) 2001, 2002 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 2, 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 COPYING.  If not, write to

# the Free Software Foundation, 51 Franklin Street, Fifth Floor,

# Boston MA 02110-1301, USA.

# Generate gcc's various configuration headers:

# config.h, tconfig.h, bconfig.h, tm.h, and tm_p.h.

# $1 is the file to generate.  DEFINES, HEADERS, and possibly

# TARGET_CPU_DEFAULT are expected to be set in the environment.

if [ -z "$1" ]; then

    echo "Usage: DEFINES='list' HEADERS='list' \\" >&2

    echo "  [TARGET_CPU_DEFAULT='default'] mkconfig.sh FILE" >&2

    exit 1

fi

output=$1

rm -f ${output}T

# This converts a file name into header guard macro format.

hg_sed_expr='y,abcdefghijklmnopqrstuvwxyz./,ABCDEFGHIJKLMNOPQRSTUVWXYZ__,'

header_guard=GCC_`echo ${output} | sed -e ${hg_sed_expr}`

# Add multiple inclusion protection guard, part one.

echo "#ifndef ${header_guard}" >> ${output}T

echo "#define ${header_guard}" >> ${output}T

# Define TARGET_CPU_DEFAULT if the system wants one.

# This substitutes for lots of *.h files.

if [ "$TARGET_CPU_DEFAULT" != "" ]; then

    echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)" >> ${output}T

fi

# Provide defines for other macros set in config.gcc for this file.

for def in $DEFINES; do

    echo "#ifndef $def" | sed 's/=.*//' >> ${output}T

    echo "# define $def" | sed 's/=/ /' >> ${output}T

    echo "#endif" >> ${output}T

done

# The first entry in HEADERS may be auto-FOO.h ;

# it wants to be included even when not -DIN_GCC.

if [ -n "$HEADERS" ]; then

    set $HEADERS

    case "$1" in auto-* )

        echo "#include \"$1\"" >> ${output}T

        shift

        ;;

    esac

    if [ $# -ge 1 ]; then

        echo '#ifdef IN_GCC' >> ${output}T

        for file in "$@"; do

            echo "# include \"$file\"" >> ${output}T

        done

        echo '#endif' >> ${output}T

    fi

fi

# If this is tm.h, now include insn-constants.h and insn-flags.h only

# if IN_GCC is defined but neither GENERATOR_FILE nor USED_FOR_TARGET

# is defined.  (Much of this is temporary.)

case $output in

    tm.h )

        cat >> ${output}T <<EOF

#if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET

# include "insn-constants.h"

# include "insn-flags.h"

#endif

EOF

    ;;

esac

# Add multiple inclusion protection guard, part two.

echo "#endif /* ${header_guard} */" >> ${output}T

# Avoid changing the actual file if possible.

if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then

    echo $output is unchanged >&2

    rm -f ${output}T

else

    mv -f ${output}T $output

fi

# Touch a stamp file for Make's benefit.

rm -f cs-$output

echo timestamp > cs-$output