#! /bin/sh

# Copyright (C) 2001, 2002, 2006 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 test -z $1 {
    echo "Usage: DEFINES='list' HEADERS='list' \\" > !2
    echo "  [TARGET_CPU_DEFAULT='default'] mkconfig.sh FILE" > !2
    exit 1
}

setglobal output = $1
rm -f $(output)T

# This converts a file name into header guard macro format.
setglobal hg_sed_expr = ''y,abcdefghijklmnopqrstuvwxyz./,ABCDEFGHIJKLMNOPQRSTUVWXYZ__,''
setglobal 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

# A special test to ensure that build-time files don't blindly use
# config.h.
if test x"$output" = x"config.h" {
  echo "#ifdef GENERATOR_FILE" >> $(output)T
  echo "#error config.h is for the host, not build, machine." >> $(output)T
  echo "#endif" >> $(output)T
}

# Define TARGET_CPU_DEFAULT if the system wants one.
# This substitutes for lots of *.h files.
if test $TARGET_CPU_DEFAULT != "" {
    echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)" >> $(output)T
}

# Provide defines for other macros set in config.gcc for this file.
for def in [$DEFINES] {
    echo "#ifndef $def" | sed 's/=.*//' >> $(output)T
    echo "# define $def" | sed 's/=/ /' >> $(output)T
    echo "#endif" >> $(output)T
}

# The first entry in HEADERS may be auto-FOO.h ;
# it wants to be included even when not -DIN_GCC.
if test -n $HEADERS {
    set $HEADERS
    match $1 { with auto-* 
	echo "#include \"$1\"" >> $(output)T
	shift
	
    }
    if test $Argc -ge 1 {
	echo '#ifdef IN_GCC' >> $(output)T
	for file in [@Argv] {
	    echo "# include \"$file\"" >> $(output)T
	}
	echo '#endif' >> $(output)T
    }
}

# 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.)

match $output {
    with tm.h 
        cat >> $(output)T << """
#if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET
# include "insn-constants.h"
# include "insn-flags.h"
#endif
"""
    
}

# Add multiple inclusion protection guard, part two.
echo "#endif /* $(header_guard) */" >> $(output)T

# Avoid changing the actual file if possible.
if test -f $output && cmp $(output)T $output >/dev/null !2 > !1 {
    echo $output is unchanged > !2
    rm -f $(output)T
} else {
    mv -f $(output)T $output
}

# Touch a stamp file for Make's benefit.
rm -f cs-$output
echo timestamp > cs-$output