#! /bin/sh
-# Generate gcc's config.h, which is not your normal autoconf-generated
-# config.h (that's auto-(host|build).h). $1 is the file to generate.
-# HEADERS, DEFINES, and possibly TARGET_CPU_DEFAULT are expected to be
-# set in the environment.
+# Copyright (C) 2001, 2002, 2006, 2007, 2010, 2011
+# 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/>.
+
+
+# Generate gcc's various configuration headers:
+# config.h, tconfig.h, bconfig.h, tm.h, libgcc_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: HEADERS='list' DEFINES='list' mkconfig.sh FILE" >&2
+ 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
+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}`
-# We used to exec > $output.T but apparently this has bugs.
-# Use a redirected subshell instead.
-(
+# 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 "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)"
+ echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)" >> ${output}T
fi
-# The first entry in HEADERS may be auto-host.h or auto-build.h;
+# 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" >> ${output}T
+done
+
+# The first entry in HEADERS may be auto-FOO.h ;
# it wants to be included even when not -DIN_GCC.
+# Postpone including defaults.h until after the insn-*
+# headers, so that the HAVE_* flags are available
+# when defaults.h gets included.
+postpone_defaults_h="no"
if [ -n "$HEADERS" ]; then
- set $HEADERS; first=$1
- case $first in auto-* )
- echo "#include \"$first\""
+ set $HEADERS
+ case "$1" in auto-* )
+ echo "#include \"$1\"" >> ${output}T
shift
- HEADERS=$*
;;
esac
+ if [ $# -ge 1 ]; then
+ echo '#ifdef IN_GCC' >> ${output}T
+ for file in "$@"; do
+ if test x"$file" = x"defaults.h"; then
+ postpone_defaults_h="yes"
+ else
+ echo "# include \"$file\"" >> ${output}T
+ fi
+ done
+ echo '#endif' >> ${output}T
+ fi
fi
-if [ -n "$HEADERS" ]; then
- echo '#ifdef IN_GCC'
- for file in $HEADERS; do
- echo "# include \"$file\""
- done
- echo '#endif'
-fi
+# If this is tm.h, now include insn-flags.h only if IN_GCC is defined
+# but neither GENERATOR_FILE nor USED_FOR_TARGET is defined. (Much of this
+# is temporary.)
-for def in $DEFINES; do
- echo "#ifndef $def"
- echo "# define $def"
- echo "#endif"
-done
+case $output in
+ tm.h )
+ cat >> ${output}T <<EOF
+#if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET
+# include "insn-flags.h"
+#endif
+EOF
+ ;;
+esac
-# Include insn-codes.h last, because it includes machmode.h,
-# and we want EXTRA_CC_MODES to be taken into account.
-echo "#ifndef GENERATOR_FILE"
-echo "#include \"insn-codes.h\""
-echo "#include \"insn-flags.h\""
-echo "#endif"
+# If we postponed including defaults.h, add the #include now.
+if test x"$postpone_defaults_h" = x"yes"; then
+ echo "# include \"defaults.h\"" >> ${output}T
+fi
-) > $output.T
+# 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
+if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then
echo $output is unchanged >&2
- rm -f $output.T
+ rm -f ${output}T
else
- mv -f $output.T $output
+ mv -f ${output}T $output
fi
# Touch a stamp file for Make's benefit.
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