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mknative-gcc revision 1.103 
      1 #!/bin/sh
      2 #	$NetBSD: mknative-gcc,v 1.103 2019/10/24 03:19:14 christos Exp $
      3 #
      4 # Shell script for generating all the constants needed for a native
      5 # platform build of gcc.
      6 #
      7 # This version is for GCC 6.4
      8 
      9 # initialise
     10 
     11 _TMPDIR=$2
     12 _TOP=$3
     13 _SRC=$4
     14 _PLATFORM=$5
     15 _DESTDIR=$6
     16 _TOOLDIR=$7
     17 _VPATH=`grep VPATH ${_TMPDIR}/Makefile | sed 's,^.*=[ 	]*,,'`
     18 _GNU_DIST=`cd ${_VPATH}; pwd`
     19 
     20 if [ -z "$_DESTDIR" ]; then
     21 	echo "\$_DESTDIR is empty" 2>&1
     22 	exit 1
     23 fi
     24 
     25 . $_TOP/tools/gcc/mknative.common
     26 
     27 _OUTDIR="$_TOP/external/gpl3/gcc"
     28 _OUTDIRBASE="external/gpl3/gcc"
     29 
     30 sanitise_includes () {
     31 	sed \
     32 		-e "s,-I$_DESTDIR/usr/include,,g" \
     33 		-e "s,-I$_SRC/external/lgpl3/mpfr/dist/src,,g" \
     34 		-e "s,-I$_SRC/external/lgpl3/mpc/dist/src,,g" \
     35 		-e "s,-I$_SRC/external/lgpl3/gmp/lib/libgmp/arch/[a-z_0-9-]*,,g" \
     36 		-e "s,-I$_TOOLDIR/include,,g" \
     37 		-e "s,-I/usr/include/[^ 	]*,,"
     38 }
     39 
     40 ##### lib/libg2c #####
     41 
     42 get_libg2c () {
     43 	mkdir -p $_OUTDIR/lib/libg2c3/arch/$MACHINE_ARCH
     44 
     45 	write_c $_OUTDIRBASE/lib/libg2c3/arch/$MACHINE_ARCH/config.h <$_TMPDIR/$_PLATFORM/libf2c/libU77/config.h
     46 	write_c $_OUTDIRBASE/lib/libg2c3/arch/$MACHINE_ARCH/g2c.h <$_TMPDIR/$_PLATFORM/libf2c/g2c.h
     47 
     48 	{
     49 		getvars $_PLATFORM/libf2c/Makefile \
     50 			F2CEXT
     51 		getvars $_PLATFORM/libf2c/libF77/Makefile \
     52 			ALL_CFLAGS OBJS
     53 		getvars $_PLATFORM/libf2c/libI77/Makefile \
     54 			ALL_CFLAGS OBJS | sed 's,=,+=,'
     55 		getvars $_PLATFORM/libf2c/libU77/Makefile \
     56 			ALL_CFLAGS OBJS | sed 's,=,+=,'
     57 	} | write_mk $_OUTDIRBASE/lib/libg2c3/arch/$MACHINE_ARCH/defs.mk
     58 }
     59 
     60 ##### lib/libgcc #####
     61 
     62 get_libgcc () {
     63 	_subdir="$1"
     64 	mkdir -p $_OUTDIR/lib/lib$_subdir/arch
     65 
     66 	# DPBIT, FPBIT only used on mn10[23]00, we don't need them.
     67 	# XXX we should probably grab everything Just In Case for
     68 	# the future.
     69 
     70 	mkdir -p $_OUTDIR/lib/lib$_subdir/arch/$MACHINE_ARCH
     71 	cd $_TMPDIR/$_PLATFORM/libgcc
     72 	{
     73 		getvars $_PLATFORM/libgcc/Makefile \
     74 			INCLUDES \
     75 			INTERNAL_CFLAGS \
     76 			LIB2ADD LIB2ADDEH LIB2ADD_ST \
     77 			LIB1ASMFUNCS LIB1ASMSRC \
     78 			LIB2_DIVMOD_FUNCS LIB2FUNCS_ST \
     79 			LIB2FUNCS_EXTRA \
     80 			LIBGCC2_CFLAGS \
     81 			SHLIB_MKMAP SHLIB_MKMAP_OPTS \
     82 			SHLIB_MAPFILES SHLIB_NM_FLAGS
     83 		getvars gcc/Makefile \
     84 			NOEXCEPTION_FLAGS EXTRA_HEADERS
     85 	}	| sanitise_includes \
     86 		| write_mk $_OUTDIRBASE/lib/lib$_subdir/arch/$MACHINE_ARCH/defs.mk
     87 
     88 	cd $_TMPDIR/$_PLATFORM/libgcc
     89 	{
     90 		getvars $_PLATFORM/libgcc/Makefile \
     91 			enable_execute_stack \
     92 			unwind_header md_unwind_header \
     93 			sfp_machine_header thread_header
     94 	}	| sanitise_includes \
     95 		| write_mk $_OUTDIRBASE/lib/lib$_subdir/arch/$MACHINE_ARCH/gthr-defs.mk
     96 
     97 	if [ "${MACHINE_ARCH}" = "m68000" ]
     98 	then
     99 		ex <<__EOF__ $_OUTDIR/lib/lib$_subdir/arch/$MACHINE_ARCH/defs.mk
    100 /G_LIBGCC2_CFLAGS/ s/-fPIC//
    101 wq
    102 __EOF__
    103 	fi
    104 
    105 	for f in auto-target.h; do
    106 		write_c $_OUTDIRBASE/lib/lib$_subdir/arch/$MACHINE_ARCH/$f \
    107 		    <$_TMPDIR/$_PLATFORM/libgcc/$f
    108 	done
    109 }
    110 
    111 ##### lib/libgcov #####
    112 
    113 get_libgcov () {
    114 	_subdir="$1"
    115 	_mf="$2"
    116 
    117 	mkdir -p $_OUTDIR/lib/lib$_subdir/libgcov/arch/$MACHINE_ARCH
    118 
    119 	{
    120 		getvars $_mf \
    121 			LIBGCOV_MERGE \
    122 			LIBGCOV_PROFILER \
    123 			LIBGCOV_INTERFACE \
    124 			LIBGCOV_DRIVER
    125 	} | write_mk $_OUTDIRBASE/lib/lib$_subdir/libgcov/arch/$MACHINE_ARCH/defs.mk
    126 
    127 	write_c $_OUTDIRBASE/lib/lib$_subdir/libgcov/arch/$MACHINE_ARCH/gcov-iov.h \
    128 	   <$_TMPDIR/gcc/gcov-iov.h
    129 
    130 }
    131 
    132 ##### lib/libiberty #####
    133 
    134 get_gcc_libiberty () {
    135 	_subdir="$1"
    136 	_libibertydir="lib/libiberty"
    137 	mkdir -p $_OUTDIR/$_libibertydir/arch/$MACHINE_ARCH
    138 
    139 	getvars libiberty/Makefile \
    140 		ALLOCA EXTRA_OFILES LIBOBJS REQUIRED_OFILES \
    141 		| write_mk $_OUTDIRBASE/$_libibertydir/defs.mk
    142 
    143 	write_c $_OUTDIRBASE/$_libibertydir/arch/$MACHINE_ARCH/config.h \
    144 		<$_TMPDIR/libiberty/config.h
    145 }
    146 
    147 ##### lib/libdecnumber #####
    148 
    149 get_libdecnumber () {
    150 	_subdir="$1"
    151 
    152 	mkdir -p $_OUTDIR/usr.bin/$_subdir/arch/$MACHINE_ARCH
    153 	write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$MACHINE_ARCH/config.h \
    154 		<$_TMPDIR/libdecnumber/config.h
    155 }
    156 
    157 ##### lib/libgomp #####
    158 
    159 get_libgomp () {
    160 	_subdir="$1"
    161 
    162 	mkdir -p $_OUTDIR/lib/$_subdir/arch/$MACHINE_ARCH
    163 
    164 	getvars $_PLATFORM/libgomp/Makefile \
    165 		libgomp_la_SOURCES \
    166 		| write_mk $_OUTDIRBASE/lib/$_subdir/defs.mk
    167 
    168 	write_c $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/config.h \
    169 		<$_TMPDIR/$_PLATFORM/libgomp/config.h
    170 	write_c $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/libgomp_f.h \
    171 		<$_TMPDIR/$_PLATFORM/libgomp/libgomp_f.h
    172 	write_mk $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/libgomp.spec \
    173 		<$_TMPDIR/$_PLATFORM/libgomp/libgomp.spec
    174 	write_c $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/omp.h \
    175 		<$_TMPDIR/$_PLATFORM/libgomp/omp.h
    176 }
    177 
    178 ##### lib/libbacktrace #####
    179 
    180 get_libbacktrace () {
    181 	_subdir="$1"
    182 
    183 	mkdir -p $_OUTDIR/lib/$_subdir/arch/$MACHINE_ARCH
    184 	write_c $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/config.h \
    185 		<$_TMPDIR/$_PLATFORM/$_subdir/config.h
    186 	write_c $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/backtrace-supported.h \
    187 		<$_TMPDIR/$_PLATFORM/$_subdir/backtrace-supported.h
    188 }
    189 
    190 ##### lib/libobjc #####
    191 
    192 get_libobjc () {
    193 	_subdir="$1/arch/$MACHINE_ARCH"
    194 	_options="ALL_OPT_FILES"
    195 
    196 	mkdir -p $_OUTDIR/lib/$_subdir
    197 
    198 	{
    199 		if [ -n "$_options" ]; then
    200 			getvars gcc/Makefile $_options
    201 		fi
    202 		getvars $_PLATFORM/libobjc/Makefile \
    203 			ALL_CFLAGS INCLUDES OBJC_SOURCE_FILES C_SOURCE_FILES OBJC_H \
    204 			| sed "s,$_GNU_DIST,\${GNUHOSTDIST},g"
    205 	} | sanitise_includes \
    206 	  | write_mk $_OUTDIRBASE/lib/$_subdir/defs.mk
    207 
    208 	write_c $_OUTDIRBASE/lib/$_subdir/config.h \
    209 		<$_TMPDIR/$_PLATFORM/libobjc/config.h
    210 }
    211 
    212 ##### lib/libstdc++-v3 #####
    213 
    214 get_libstdcxx_v3 () {
    215 	_subdir="$1"
    216 	_ver="$2"
    217 
    218 	mkdir -p $_OUTDIR/lib/$_subdir/arch/$MACHINE_ARCH
    219 
    220 	_build_headers="c++config.h cxxabi_tweaks.h"
    221 	_headers1="c_base_headers_extra_install"
    222 	_headers1="$_headers1 tr1_headers tr2_headers decimal_headers c_compatibility_headers_install"
    223 	_headers1="$_headers1 debug_headers parallel_headers"
    224 	_headers2="host_headers thread_host_headers"
    225 	_pf_headers="profile_headers profile_impl_headers"
    226 	_pb_headers="pb_headers1 pb_headers2 pb_headers3 pb_headers4 pb_headers5 pb_headers6 pb_headers7"
    227 
    228 	# build files
    229 	for h in $_build_headers; do
    230 		write_c $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/$h \
    231 			<$_TMPDIR/$_PLATFORM/libstdc++-v3/include/$_PLATFORM/bits/$h
    232 	done
    233 
    234 	write_c $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/gstdint.h \
    235 		<$_TMPDIR/$_PLATFORM/libstdc++-v3/include/gstdint.h
    236 	write_c $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/symver-config.h \
    237 		<$_TMPDIR/$_PLATFORM/libstdc++-v3/config.h
    238 
    239 	{
    240 		getvars $_PLATFORM/libstdc++-v3/Makefile \
    241 			port_specific_symbol_files
    242 		getvars $_PLATFORM/libstdc++-v3/src/Makefile \
    243 			cxx11_sources \
    244 			cxx98_sources
    245 
    246 		# libsupc++
    247 		getvars $_PLATFORM/libstdc++-v3/libsupc++/Makefile \
    248 			sources | sed 's/^G_sources=/G_LIBSUPCXX_SOURCES=/'
    249 		getvars $_PLATFORM/libstdc++-v3/libsupc++/Makefile \
    250 			c_sources | sed 's/^G_c_sources=/G_LIBSUPCXX_C_SOURCES=/'
    251 
    252 		# includes
    253 		getvars $_PLATFORM/libstdc++-v3/include/Makefile \
    254 			c_base_headers std_headers | sed -e 's#/[^ 	][^ 	]*/##g' -e 's/\${GNUHOSTDIST}//g'
    255 
    256 		# src
    257 		getvars $_PLATFORM/libstdc++-v3/src/Makefile \
    258 			libstdc___la_SOURCES | sed 's/^G_libstdc___la_SOURCES=/G_SRC_SOURCES=/'
    259 		getvars $_PLATFORM/libstdc++-v3/src/c++11/Makefile \
    260 			libc__11convenience_la_SOURCES | \
    261 			sed -e 's/^G_libc__11convenience_la_SOURCES=/G_CPP11_SOURCES=/' \
    262 			    -e 's/codecvt.cc/c11-codecvt.cc/'
    263 		getvars $_PLATFORM/libstdc++-v3/src/c++98/Makefile \
    264 			GLIBCXX_ABI_FLAGS libc__98convenience_la_SOURCES | \
    265 			sed -e 's/^G_libc__98convenience_la_SOURCES=/G_CPP98_SOURCES=/' \
    266 			    -e 's/codecvt.cc/c98-codecvt.cc/'
    267 		getvars $_PLATFORM/libstdc++-v3/src/filesystem/Makefile \
    268 			libstdc__fs_la_SOURCES | \
    269 			sed -e 's/^G_libstdc__fs_la_SOURCES=/G_FILESYSTEM_SOURCES=/'
    270 		getvars $_PLATFORM/libstdc++-v3/Makefile ATOMICITY_SRCDIR \
    271 			BASIC_FILE_CC CLOCALE_CC CCODECVT_CC CCOLLATE_CC \
    272 			CCTYPE_CC  CMESSAGES_CC CMONEY_CC CNUMERIC_CC CTIME_CC \
    273 			CPU_OPT_BITS_RANDOM
    274 
    275 		# includes
    276 		getvars $_PLATFORM/libstdc++-v3/include/Makefile \
    277 			backward_headers c_base_headers_extra $_headers1 $_pb_headers | \
    278 				sed -e 's#\${GNUHOSTDIST}/libstdc++-v3/include/##g'
    279 		getvars $_PLATFORM/libstdc++-v3/include/Makefile \
    280 			bits_headers ext_headers $_headers2 | \
    281 				sed -e 's#\${GNUHOSTDIST}/libstdc++-v3/include/##g' -e 's#\${GNUHOSTDIST}/libstdc++-v3/config/##g'
    282 		getvars $_PLATFORM/libstdc++-v3/include/Makefile \
    283 			$_pf_headers | sed -e 's#\${GNUHOSTDIST}/libstdc++-v3/include/profile/##g'
    284 		getvars $_PLATFORM/libstdc++-v3/include/Makefile \
    285 			BASIC_FILE_H ALLOCATOR_H CSTDIO_H CLOCALE_H CMESSAGES_H CTIME_H
    286 	} | sanitise_includes \
    287 	  | write_mk $_OUTDIRBASE/lib/$_subdir/arch/$MACHINE_ARCH/defs.mk
    288 }
    289 
    290 ##### usr.bin/gcc* #####
    291 
    292 get_gcc_bootstrap () {
    293 	_subdir="$1"
    294 	mkdir -p $_OUTDIR/usr.bin/$_subdir/arch/$MACHINE_ARCH
    295 	for f in auto-host tm config; do
    296 		write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$MACHINE_ARCH/$f.h <$_TMPDIR/gcc/$f.h
    297 	done
    298 	# XXXGCC5 don't really want to copy insn-modes as we build
    299 	# it but libgcc needs to too early yet
    300 	for f in insn-modes; do
    301 		write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$MACHINE_ARCH/$f.h <$_TMPDIR/gcc/$f.h
    302 	done
    303 }
    304 
    305 get_gcc () {
    306 	_subdir="$1"
    307 	mkdir -p $_OUTDIR/usr.bin/$_subdir/arch/$MACHINE_ARCH
    308 	mkdir -p $_OUTDIR/usr.bin/libcpp/arch/$MACHINE_ARCH
    309 	mkdir -p $_OUTDIR/usr.bin/include/arch
    310 	mkdir -p $_OUTDIR/usr.bin/common-target/arch
    311 	_buildname="BUILD_"
    312 	_libcppsubdir=""
    313 	_extravars="TM_H ALL_OPT_FILES"
    314 	_hconfig_h=""
    315 	_extravars2="tm_file_list build_xm_include_list"
    316 	_extravars3="tm_p_include_list"
    317 
    318 	{
    319 		getvars gcc/Makefile \
    320 			${_buildname}EARLY_SUPPORT ${_buildname}ERRORS ${_buildname}PRINT \
    321 			${_buildname}RTL ${_buildname}SUPPORT ${_buildname}VARRAY \
    322 			${_buildname}MD | \
    323 		    sed -e 's#build/errors.o#build-errors.o#g' \
    324 			-e 's#build/print-rtl.o#build-print-rtl.o#g' \
    325 			-e 's#build/rtl.o#build-rtl.o#g' \
    326 			-e 's#build/varray.o#build-varray.o#g' \
    327 			-e 's#build/ggc-none.o#build-ggc-none.o#g' \
    328 			-e 's#build/##g'
    329 		getvars gcc/Makefile \
    330 			ALL_CFLAGS ALL_CPPFLAGS C_AND_OBJC_OBJS C_OBJS CCCP_OBJS \
    331 			GCC_OBJS GCOV_OBJS GCOV_DUMP_OBJS GXX_OBJS GTM_H PROTO_OBJS ${_extravars1} \
    332 			INCLUDES md_file OBJC_OBJS OBJS out_file version \
    333 			BUILD_PREFIX RTL_H RTL_BASE_H TREE_H ${_hconfig_h} BASIC_BLOCK_H GCC_H \
    334 			GGC_H \
    335 			GTFILES_SRCDIR GTFILES_FILES_FILES GTFILES_FILES_LANGS \
    336 			GTFILES GTFILES_LANG_DIR_NAMES NOEXCEPTION_FLAGS \
    337 			NATIVE_SYSTEM_HEADER_DIR \
    338 			tm_defines host_xm_file host_xm_defines tm_p_file \
    339 			target_cpu_default ${_extravars} ${_extravars2} \
    340 			lang_specs_files ${_extravars3} \
    341 			common_out_file \
    342 				| sanitise_includes
    343 		getvars gcc/Makefile \
    344 			LIB2ADDEHDEP | sed 's/unwind.inc//'
    345 		getvars gcc/Makefile \
    346 			CXX_OBJS CXX_C_OBJS | sed 's/cp\///g'
    347 		getvars gcc/Makefile \
    348 			F77_OBJS | sed 's/f\///g'
    349 		getvars libcpp/Makefile \
    350 			libcpp_a_OBJS
    351 		getvars gcc/Makefile \
    352 			ENABLE_SHARED
    353 		echo G_SHLIB_LINK="$CC -shared"
    354 		echo G_SHLIB_MULTILIB=.
    355 	} | write_mk $_OUTDIRBASE/usr.bin/$_subdir/arch/$MACHINE_ARCH/defs.mk
    356 
    357 	getvars gcc/Makefile \
    358 		EXTRA_HEADERS \
    359 			| write_mk $_OUTDIRBASE/usr.bin/include/arch/$MACHINE_ARCH.mk
    360 
    361 	getvars gcc/Makefile \
    362 		OBJS-libcommon \
    363 			| write_mk $_OUTDIRBASE/usr.bin/common/defs.mk
    364 	getvars gcc/Makefile \
    365 		OBJS-libcommon-target \
    366 			| write_mk $_OUTDIRBASE/usr.bin/common-target/arch/$MACHINE_ARCH.mk
    367 
    368 	write_c $_OUTDIRBASE/usr.bin/libcpp/arch/$MACHINE_ARCH/config.h <$_TMPDIR/libcpp/config.h
    369 	hfiles='auto-host configargs config bconfig bversion plugin-version multilib tm'
    370 	for f in $hfiles; do
    371 		write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$MACHINE_ARCH/$f.h <$_TMPDIR/gcc/$f.h
    372 		if [ "${MACHINE_ARCH}" = "powerpc" -a "${f}" = "configargs" ]
    373 		then
    374 			ex <<__EOF__ $_OUTDIR/usr.bin/$_subdir/arch/$MACHINE_ARCH/$f.h
    375 /configuration_arguments/ s/$//
    376 ya
    377 i
    378 #ifdef _SOFT_FLOAT
    379 .
    380 pu
    381 s/";$/ -with-float=soft";/
    382 a
    383 #else
    384 #endif
    385 .
    386 . m +1
    387 /configure_default_options/ s/{ NULL.*$//
    388 a
    389 #ifdef _SOFT_FLOAT
    390   { "float", "soft" },
    391 #endif
    392   { NULL, NULL }
    393 };
    394 .
    395 wq
    396 __EOF__
    397 		fi
    398 		if [ "${f}" = "configargs" ]
    399 		then
    400 			_srcquoted=$(echo "$_SRC" | sed 's/\//\\\//g')
    401 			sed -i -E -e "s,$_srcquoted,/usr/src,g" \
    402 				  -e 's/--build=[^ ]+ --host=([^ ]+)/--build=\1 --host=\1/' \
    403 				$_OUTDIR/usr.bin/$_subdir/arch/$MACHINE_ARCH/$f.h
    404 		fi
    405 	done
    406 
    407 	# keep identical
    408 	for f in all-tree.def; do
    409 		cp $_TMPDIR/gcc/$f $_OUTDIR/usr.bin/$_subdir/arch/$MACHINE_ARCH/$f
    410 	done
    411 
    412 	# special transforms
    413 	for f in gtyp-input.list; do
    414 		sed -e "s@^.*$_OUTDIRBASE/dist@SRCDIR@" < $_TMPDIR/gcc/$f > $_OUTDIR/usr.bin/$_subdir/arch/$MACHINE_ARCH/$f
    415 	done
    416 
    417 	# special platforms
    418 	if [ "${MACHINE_ARCH}" = "sh3el" -o "${MACHINE_ARCH}" = "sh3eb" ]; then
    419 		write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$MACHINE_ARCH/sysroot-suffix.h <$_TMPDIR/gcc/sysroot-suffix.h
    420 	fi
    421 
    422 	if [ "${MACHINE_ARCH}" = "i386" -o "${MACHINE_ARCH}" = "x86_64" ]; then
    423 		write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$MACHINE_ARCH/i386-builtin-types.inc <$_TMPDIR/gcc/i386-builtin-types.inc
    424 	fi
    425 
    426 	case "${MACHINE_ARCH}" in
    427 	(*arm*)
    428 		d=$_OUTDIRBASE/usr.bin/$_subdir/arch/${MACHINE_ARCH}
    429 		for f in arm-cpu.h arm-cpu-cdata.h arm-cpu-data.h arm-isa.h; do
    430 			write_c $d/$f <$_TMPDIR/gcc/$f
    431 		done
    432 		;;
    433 	esac
    434 }
    435 
    436 ##### main #####
    437 
    438 case "$1" in
    439 # .mk and .h files for libgcc bootstrap (from host build)
    440 
    441 libgcc*-bootstrap)
    442 	get_libgcc gcc
    443 	get_libgcov gcc $_PLATFORM/libgcc/Makefile
    444 	get_gcc_bootstrap gcc
    445 	exit 0
    446 	;;
    447 
    448 libstdc++-bootstrap)
    449 	get_libstdcxx_v3 libstdc++-v3 gcc
    450 	exit 0
    451 	;;
    452 
    453 gcc*)
    454 	get_gcc gcc
    455 	get_libgcc gcc
    456 	get_libgcov gcc $_PLATFORM/libgcc/Makefile
    457 	get_gcc_bootstrap gcc
    458 	get_gcc_libiberty gcc
    459 	get_libobjc libobjc
    460 	get_libstdcxx_v3 libstdc++-v3 gcc
    461 	get_libdecnumber libdecnumber
    462 	get_libgomp libgomp
    463 	get_libbacktrace libbacktrace
    464 	exit 0
    465 	;;
    466 
    467 
    468 *)
    469 	echo invalid arguments;
    470 	exit 1
    471 	;;
    472 esac
    473