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|
#! /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.
if [ -z "$1" ]; then
echo "Usage: HEADERS='list' DEFINES='list' mkconfig.sh FILE" >&2
exit 1
fi
output=$1
rm -f $output.T
# We used to exec > $output.T but apparently this has bugs.
# Use a redirected subshell instead.
(
# Define TARGET_CPU_DEFAULT if the system wants one.
# This substitutes for lots of *.h files.
if [ "$TARGET_CPU_DEFAULT" != "" ]; then
echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)"
fi
# The first entry in HEADERS may be auto-host.h or auto-build.h;
# it wants to be included even when not -DIN_GCC.
if [ -n "$HEADERS" ]; then
set $HEADERS; first=$1
case $first in auto-* )
echo "#include \"$first\""
shift
HEADERS=$*
;;
esac
fi
if [ -n "$HEADERS" ]; then
echo '#ifdef IN_GCC'
for file in $HEADERS; do
echo "# include \"$file\""
done
echo '#endif'
fi
for def in $DEFINES; do
echo "#ifndef $def" | sed 's/=.*//'
echo "# define $def" | sed 's/=/ /'
echo "#endif"
done
# If this is tm_p.h, include tm-preds.h unconditionally.
# If this is tconfig.h or hconfig.h, include no more files.
# Otherwise, include insn-constants.h and insn-flags.h,
# but only if GENERATOR_FILE is not defined.
case $output in
*tm_p.h)
echo "#include \"tm-preds.h\""
;;
*tconfig.h | *hconfig.h)
;;
*)
echo "#ifndef GENERATOR_FILE"
echo "# include \"insn-constants.h\""
echo "# include \"insn-flags.h\""
echo "#endif"
;;
esac
) > $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
|
