#!/bin/sh
#	$NetBSD: mknative-gcc,v 1.4 2003/07/30 05:06:28 mrg Exp $
#
# Shell script for generating all the constants needed for a native
# platform build of src/gnu/dist/toolchain.
#

bomb () {
	echo >&1 "ABORT: $*"
	exit 1
}

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

# usage: write_c FILENAME
write_c () {
	echo '/* This file is automatically generated.  DO NOT EDIT! */' >$_TOP/$1.tmp || \
		bomb "cannot create $1"
	grep '$''NetBSD' $0 | sed 's,[#$],,g;s,.*,/* Generated from: & */,' >>$_TOP/$1.tmp
	echo '' >>$_TOP/$1.tmp
	writefile $1
}

# usage: write_mk FILENAME
write_mk () {
	echo '# This file is automatically generated.  DO NOT EDIT!' >$_TOP/$1.tmp || \
		bomb "cannot create $1"
	grep '$''NetBSD' $0 | sed 's,[#$],,g;s,.*,# Generated from: &,' >>$_TOP/$1.tmp
	echo '#' >>$_TOP/$1.tmp
	writefile $1
}

writefile () {
	sed -e 's,netbsd\(elf\)*1[0-9\.]*\(_\)*[A-Z]*,netbsd\1,' \
	    -e 's,^/\* #undef HAVE_MMAP \*/$,#define HAVE_MMAP 1,' >>$_TOP/$1.tmp

	# Compare new file, sans "generated from" comments and RCS Id, to
	# old file.  If they match, don't change anything.
	rm -f $_TMPDIR/.1 $_TMPDIR/.2
	grep -v 'Generated from:' $_TOP/$1 >$_TMPDIR/.1 2>/dev/null
	grep -v 'Generated from:' $_TOP/$1.tmp >$_TMPDIR/.2

	# will not overwrite a file that has the same content
	if cmp $_TMPDIR/.1 $_TMPDIR/.2 >/dev/null 2>&1; then
		rm -f $_TOP/$1.tmp
	else
		echo >&2 "$1 changed"
		mv -f $_TOP/$1.tmp $_TOP/$1
	fi
}

##### gnu/lib/libg2c #####

get_libg2c () {
	mkdir -p $_TOP/gnu/lib/libg2c3/arch/$MACHINE_ARCH

	write_c gnu/lib/libg2c3/arch/$MACHINE_ARCH/config.h <$_TMPDIR/$_PLATFORM/libf2c/libU77/config.h
	write_c gnu/lib/libg2c3/arch/$MACHINE_ARCH/g2c.h <$_TMPDIR/$_PLATFORM/libf2c/g2c.h

	{
		getvars $_PLATFORM/libf2c/Makefile \
			F2CEXT
		getvars $_PLATFORM/libf2c/libF77/Makefile \
			ALL_CFLAGS OBJS
		getvars $_PLATFORM/libf2c/libI77/Makefile \
			ALL_CFLAGS OBJS | sed 's,=,+=,'
		getvars $_PLATFORM/libf2c/libU77/Makefile \
			ALL_CFLAGS OBJS | sed 's,=,+=,'
	} | write_mk gnu/lib/libg2c3/arch/$MACHINE_ARCH/defs.mk
}

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

get_libgcc () {
	mkdir -p $_TOP/gnu/lib/libgcc3

	# DPBIT, FPBIT only used on mn10[23]00, we don't need them.
	# XXX we should probably grab everything Just In Case for
	# the future.
	getvars gcc/Makefile \
		CXX_EXTRA_HEADERS CXX_LIB2FUNCS CXX_LIB2SRCS \
		INCLUDES LIB2ADD LIB2ADDEH LIB2FUNCS_1 LIB2FUNCS_2 \
		LIB2_DIVMOD_FUNCS LIB2FUNCS_ST \
		LIBGCC2_CFLAGS MAYBE_USE_COLLECT2 \
		tm_defines xm_file xm_defines \
		| write_mk gnu/lib/libgcc3/$MACHINE_ARCH.mk
}

##### gnu/usr.bin/gcc3/libiberty #####

get_gcc3_libiberty () {
	mkdir -p $_TOP/gnu/usr.bin/gcc3/libiberty/arch/$MACHINE_ARCH

	getvars libiberty/Makefile \
		ALLOCA EXTRA_OFILES LIBOBJS REQUIRED_OFILES \
		| write_mk gnu/usr.bin/gcc3/libiberty/defs.mk

	write_c gnu/usr.bin/gcc3/libiberty/arch/$MACHNIE_ARCH/config.h \
		<$_TMPDIR/libiberty/config.h
}

##### gnu/lib/libobjc #####

get_libobjc () {
	mkdir -p $_TOP/gnu/lib/libobjc3

	getvars $_PLATFORM/libobjc/Makefile \
		ALL_CFLAGS INCLUDES OBJS OBJC_H \
		| sed "s,$_GNU_DIST,\${GNUHOSTDIST},g" \
		| write_mk gnu/lib/libobjc3/defs.mk
}

##### gnu/lib/libstdc++-v3 #####

get_libstdcxx_v3 () {
	mkdir -p $_TOP/gnu/lib/libstdc++-v3/arch/$MACHINE_ARCH

	# build files
	for h in gthr.h gthr-single.h gthr-posix.h gthr-default.h c++config.h; do
		write_c gnu/lib/libstdc++-v3/arch/$MACHINE_ARCH/$h \
			<$_TMPDIR/$_PLATFORM/libstdc++-v3/include/$_PLATFORM/bits/$h
	done

	{
		# libmath
		getvars $_PLATFORM/libstdc++-v3/libmath/Makefile \
			libmath_la_SOURCES libmath_la_LIBADD

		# libsupc++
		getvars $_PLATFORM/libstdc++-v3/libsupc++/Makefile \
			sources | sed 's/^G_sources=/G_LIBSUPCXX_SOURCES=/'
		getvars $_PLATFORM/libstdc++-v3/libsupc++/Makefile \
			c_sources | sed 's/^G_c_sources=/G_LIBSUPCXX_C_SOURCES=/'

		# src
		getvars $_PLATFORM/libstdc++-v3/src/Makefile \
			sources SECTION_FLAGS | sed 's/^G_sources=/G_SRC_SOURCES=/'

		# include
		getvars $_PLATFORM/libstdc++-v3/include/Makefile \
			c_base_headers_rename std_headers_rename
		getvars $_PLATFORM/libstdc++-v3/include/Makefile \
			bits_headers backward_headers ext_headers c_base_headers_extra \
			target_headers | sed 's#/[^ 	][^ 	]*/##g'
		getvars $_PLATFORM/libstdc++-v3/include/Makefile \
			thread_target_headers target_headers_extra | sed 's#\./[^ 	][^ 	]*/##g'
	} | write_mk gnu/lib/libstdc++-v3/arch/$MACHINE_ARCH/defs.mk
}

##### gnu/usr.bin/gcc3 #####

get_gcc () {
	mkdir -p $_TOP/gnu/usr.bin/gcc3/arch/$MACHINE_ARCH

	{
		getvars gcc/Makefile \
			ALL_CFLAGS ALL_CPPFLAGS C_AND_OBJC_OBJS C_OBJS CCCP_OBJS \
			GCOV_OBJS PROTO_OBJS HOST_PRINT HOST_RTL HOST_RTLANAL \
			HOST_SUPPORT HOST_EARLY_SUPPORT HOST_ERRORS HOST_VARRAY \
			INCLUDES md_file OBJC_OBJS OBJS out_file version \
			BUILD_PREFIX RTL_H TREE_H HCONFIG_H BASIC_BLOCK_H GCC_H \
			GTFILES_SRCDIR GTFILES_FILES_FILES GTFILES_FILES_LANGS \
			GTFILES GTFILES_LANG_DIR_NAMES \
			tm_defines host_xm_file host_xm_defines tm_p_file \
			target_cpu_default \
			LIBCPP_OBJS LIBCPP_H \
			lang_specs_files
		getvars gcc/Makefile \
			LIB2ADDEHDEP | sed 's/unwind.inc//'
		getvars gcc/Makefile \
			CXX_OBJS CXX_C_OBJS | sed 's/cp\///g'
		getvars gcc/Makefile \
			F77_OBJS | sed 's/f\///g'
	} | write_mk gnu/usr.bin/gcc3/arch/$MACHINE_ARCH/defs.mk

	for f in auto-build auto-host configargs cs-hconfig gencheck hconfig; do
		write_c gnu/usr.bin/gcc3/arch/$MACHINE_ARCH/$f.h <$_TMPDIR/gcc/$f.h
	done
}

##### main #####

_TMPDIR=$2
_TOP=$3
_PLATFORM=$4
_VPATH=`grep VPATH ${_TMPDIR}/Makefile | sed 's,^.*= ,,'`
_GNU_DIST=`cd ${_VPATH}; pwd`

case $1 in
libgcc)	# .mk and .h files for libgcc bootstrap (from host build)
	get_libgcc
	exit 0
	;;

gcc3)
	get_gcc
	get_libg2c
	get_libgcc
	get_gcc3_libiberty
	get_libobjc
	get_libstdcxx_v3
	exit 0
	;;

*)	echo invalid arguments; exit 1;;
esac