#!/bin/sh
#	$NetBSD: toolchain2netbsd,v 1.1 2001/06/18 16:07:07 tv Exp $
#
# Shell script for generating all the constants needed for a native
# platform build of src/gnu/dist/toolchain.
#

TMPDIR=${TMPDIR:-/tmp}
MAKE=${MAKE:-make}

# usage: getvars MAKEFILE VARNAME [VARNAME...]
getvars () {
	_mf="$1"; shift
	$MAKE -f - _x_ <<EOF || { echo >&2 "ABORT: getvars $_mf $* failed"; exit 1; }
_x_:
.for var in $*
	@echo G_\${var}=\${\${var}:Q} | sed 's,$_VPATH,\$\${DIST},g'
.endfor
.include "$_TMPDIR/$_mf"
EOF
}

# usage: write_c FILENAME
write_c () {
	echo '/* This file is automatically generated.  DO NOT EDIT! */' >$1.tmp || \
		{ echo >&2 "ABORT: cannot create $1"; exit 1; }
	grep '$''NetBSD' toolchain2netbsd | sed 's,[#$],,g;s,.*,/* Generated from: & */,' >>$1.tmp
	echo '' >>$1.tmp
	writefile $1
}

# usage: write_mk FILENAME
write_mk () {
	echo '# This file is automatically generated.  DO NOT EDIT!' >$1.tmp || \
		{ echo >&2 "ABORT: cannot create $1"; exit 1; }
	grep '$''NetBSD' toolchain2netbsd | sed 's,[#$],,g;s,.*,# Generated from: &,' >>$1.tmp
	echo '#' >>$1.tmp
	writefile $1
}

writefile () {
	cat >>$1.tmp
	# will not overwrite a file that has the same content
	if cmp $1.tmp $1 >/dev/null 2>&1; then
		echo >&2 "$1 is unchanged"
		rm -f $1.tmp
	else
		mv -f $1.tmp $1
	fi
}

##### run GNU configure script #####

_TMPDIR=${TMPDIR:-/tmp}/gnu.dist.toolchain.tmp
MACHINE_ARCH=`sysctl -n hw.machine_arch`

if [ ! -d $_TMPDIR ]; then
	mkdir -p $_TMPDIR
	cwd=`pwd`
	(cd $_TMPDIR && LDFLAGS=-lintl LANGUAGES="c c++ objc f77" \
		$cwd/dist/toolchain/configure --disable-shared)
fi

_VPATH=`grep VPATH ${_TMPDIR}/Makefile | sed 's,^.*= ,,'`

##### gnu/lib/libbfd #####

mkdir -p lib/libbfd/arch/$MACHINE_ARCH

{
	getvars bfd/Makefile \
		libbfd_la_DEPENDENCIES libbfd_la_OBJECTS DEFS INCLUDES TDEFAULTS
	getvars opcodes/Makefile \
		archdefs BFD_MACHINES | sed 's,=,+=,g'
} | write_mk lib/libbfd/arch/$MACHINE_ARCH/defs.mk

(cd $_TMPDIR/bfd && $MAKE bfd.h)

write_c lib/libbfd/arch/$MACHINE_ARCH/bfd.h <$_TMPDIR/bfd/bfd.h

{
	cat $_TMPDIR/bfd/config.h
	grep -v PACKAGE $_TMPDIR/opcodes/config.h
} | write_c lib/libbfd/arch/$MACHINE_ARCH/config.h

##### gnu/lib/libgcc #####

# DPBIT, FPBIT only used on mn10[23]00, we don't need them.
getvars gcc/Makefile \
	CXX_EXTRA_HEADERS CXX_LIB2FUNCS CXX_LIB2SRCS \
	INCLUDES LIB2ADD LIB2FUNCS LIB2FUNCS_EH \
	LIBGCC2_CFLAGS MAYBE_USE_COLLECT2 \
	| write_mk lib/libgcc/$MACHINE_ARCH.mk

##### gnu/lib/libiberty #####

mkdir -p lib/libiberty/arch/$MACHINE_ARCH

getvars libiberty/Makefile \
	ALLOCA EXTRA_OFILES LIBOBJS REQUIRED_OFILES \
	| write_mk lib/libiberty/arch/$MACHINE_ARCH/defs.mk

write_c lib/libiberty/arch/$MACHINE_ARCH/config.h <$_TMPDIR/libiberty/config.h

##### gnu/usr.bin/gcc #####

mkdir -p usr.bin/gcc/arch/$MACHINE_ARCH

{
	getvars gcc/Makefile \
		ALL_CFLAGS ALL_CPPFLAGS C_AND_OBJC_OBJS C_OBJS DRIVER_DEFINES \
		HOST_LIBS HOST_PRINT HOST_RTL HOST_RTLANAL INCLUDES \
		md_file OBJC_OBJS OBJS out_file version
	getvars gcc/cp/Makefile \
		CXX_OBJS
	getvars gcc/f/Makefile \
		F77_OBJS
} | write_mk usr.bin/gcc/arch/$MACHINE_ARCH/defs.mk

for f in auto-host config gencheck hconfig options specs tconfig tm; do
	write_c usr.bin/gcc/arch/$MACHINE_ARCH/$f.h <$_TMPDIR/gcc/$f.h
done

#	-rm -rf ${_TMPDIR}