#! /bin/sh
-# Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+# 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
# 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, 59 Temple Place - Suite 330,
-# Boston MA 02111-1307, USA.
+# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+# Boston MA 02110-1301, USA.
# Generate gcc's various configuration headers:
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}" >> ${output}T
+
+# A special test to ensure that build-time files don't blindly use
+# config.h.
+if test x"$output" = x"config.h"; then
+ echo "#ifdef GENERATOR_FILE" >> ${output}T
+ echo "#error config.h is for the host, not build, machine." >> ${output}T
+ echo "#endif" >> ${output}T
+fi
+
# Define TARGET_CPU_DEFAULT if the system wants one.
# This substitutes for lots of *.h files.
if [ "$TARGET_CPU_DEFAULT" != "" ]; then
echo "#endif" >> ${output}T
done
-# The first entry in HEADERS may be auto-host.h or auto-build.h;
+# The first entry in HEADERS may be auto-FOO.h ;
# it wants to be included even when not -DIN_GCC.
if [ -n "$HEADERS" ]; then
set $HEADERS
fi
fi
-# If this is tconfig.h, now define USED_FOR_TARGET. 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.)
+# 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
- tconfig.h )
- cat >> ${output}T <<EOF
-#define USED_FOR_TARGET
-EOF
- ;;
tm.h )
cat >> ${output}T <<EOF
#if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET
;;
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