1#!/bin/sh 2# $NetBSD: mknative-gcc,v 1.109 2020/09/06 02:24:38 mrg 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 9.3 8 9# initialise 10 11_TMPDIR=$2 12_TOP=$3 13_SRC=$4 14_PLATFORM=$5 15_MACHINE_ARCH=$6 16_DESTDIR=$7 17_TOOLDIR=$8 18_VPATH=`grep VPATH ${_TMPDIR}/Makefile | sed 's,^.*=[ ]*,,'` 19_GNU_DIST=`cd ${_VPATH}; pwd` 20 21if [ -z "$_DESTDIR" ]; then 22 echo "\$_DESTDIR is empty" 2>&1 23 exit 1 24fi 25 26. $_TOP/tools/gcc/mknative.common 27 28case $0 in 29 *mknative-gcc.old) 30 _OUTDIRBASE="external/gpl3/gcc.old" 31 ;; 32 *) 33 _OUTDIRBASE="external/gpl3/gcc" 34 ;; 35esac 36_OUTDIR="$_TOP/$_OUTDIRBASE" 37 38sanitise_includes () { 39 sed \ 40 -e "s,-I$_DESTDIR/usr/include,,g" \ 41 -e "s,-I$_SRC/external/lgpl3/mpfr/dist/src,,g" \ 42 -e "s,-I$_SRC/external/lgpl3/mpc/dist/src,,g" \ 43 -e "s,-I$_SRC/external/lgpl3/gmp/lib/libgmp/arch/[a-z_0-9-]*,,g" \ 44 -e "s,-I$_TOOLDIR/include,,g" \ 45 -e "s,-I/usr/include/[^ ]*,," 46} 47 48##### lib/libg2c ##### 49 50get_libg2c () { 51 mkdir -p $_OUTDIR/lib/libg2c3/arch/$_MACHINE_ARCH 52 53 write_c $_OUTDIRBASE/lib/libg2c3/arch/$_MACHINE_ARCH/config.h <$_TMPDIR/$_PLATFORM/libf2c/libU77/config.h 54 write_c $_OUTDIRBASE/lib/libg2c3/arch/$_MACHINE_ARCH/g2c.h <$_TMPDIR/$_PLATFORM/libf2c/g2c.h 55 56 { 57 getvars $_PLATFORM/libf2c/Makefile \ 58 F2CEXT 59 getvars $_PLATFORM/libf2c/libF77/Makefile \ 60 ALL_CFLAGS OBJS 61 getvars $_PLATFORM/libf2c/libI77/Makefile \ 62 ALL_CFLAGS OBJS | sed 's,=,+=,' 63 getvars $_PLATFORM/libf2c/libU77/Makefile \ 64 ALL_CFLAGS OBJS | sed 's,=,+=,' 65 } | write_mk $_OUTDIRBASE/lib/libg2c3/arch/$_MACHINE_ARCH/defs.mk 66} 67 68##### lib/libgcc ##### 69 70get_libgcc () { 71 _subdir="$1" 72 mkdir -p $_OUTDIR/lib/lib$_subdir/arch 73 74 # DPBIT, FPBIT only used on mn10[23]00, we don't need them. 75 # XXX we should probably grab everything Just In Case for 76 # the future. 77 78 mkdir -p $_OUTDIR/lib/lib$_subdir/arch/$_MACHINE_ARCH 79 cd $_TMPDIR/$_PLATFORM/libgcc 80 { 81 getvars $_PLATFORM/libgcc/Makefile \ 82 INCLUDES \ 83 INTERNAL_CFLAGS \ 84 LIB2ADD LIB2ADDEH LIB2ADD_ST \ 85 LIB1ASMFUNCS LIB1ASMSRC \ 86 LIB2_DIVMOD_FUNCS LIB2FUNCS_ST \ 87 LIB2FUNCS_EXTRA \ 88 LIBGCC2_CFLAGS \ 89 SHLIB_MKMAP SHLIB_MKMAP_OPTS \ 90 SHLIB_MAPFILES SHLIB_NM_FLAGS 91 getvars gcc/Makefile \ 92 NOEXCEPTION_FLAGS EXTRA_HEADERS 93 } | sanitise_includes \ 94 | write_mk $_OUTDIRBASE/lib/lib$_subdir/arch/$_MACHINE_ARCH/defs.mk 95 96 cd $_TMPDIR/$_PLATFORM/libgcc 97 { 98 getvars $_PLATFORM/libgcc/Makefile \ 99 enable_execute_stack \ 100 unwind_header md_unwind_header \ 101 sfp_machine_header thread_header 102 } | sanitise_includes \ 103 | write_mk $_OUTDIRBASE/lib/lib$_subdir/arch/$_MACHINE_ARCH/gthr-defs.mk 104 105 if [ "${_MACHINE_ARCH}" = "m68000" ] 106 then 107 ex <<__EOF__ $_OUTDIR/lib/lib$_subdir/arch/$_MACHINE_ARCH/defs.mk 108/G_LIBGCC2_CFLAGS/ s/-fPIC// 109wq 110__EOF__ 111 fi 112 113 for f in auto-target.h; do 114 write_c $_OUTDIRBASE/lib/lib$_subdir/arch/$_MACHINE_ARCH/$f \ 115 <$_TMPDIR/$_PLATFORM/libgcc/$f 116 done 117} 118 119##### lib/libgcov ##### 120 121get_libgcov () { 122 _subdir="$1" 123 _mf="$2" 124 125 mkdir -p $_OUTDIR/lib/lib$_subdir/libgcov/arch/$_MACHINE_ARCH 126 127 { 128 getvars $_mf \ 129 LIBGCOV_MERGE \ 130 LIBGCOV_PROFILER \ 131 LIBGCOV_INTERFACE \ 132 LIBGCOV_DRIVER 133 } | write_mk $_OUTDIRBASE/lib/lib$_subdir/libgcov/arch/$_MACHINE_ARCH/defs.mk 134 135 write_c $_OUTDIRBASE/lib/lib$_subdir/libgcov/arch/$_MACHINE_ARCH/gcov-iov.h \ 136 <$_TMPDIR/gcc/gcov-iov.h 137 138} 139 140##### lib/libiberty ##### 141 142get_gcc_libiberty () { 143 _subdir="$1" 144 _libibertydir="lib/libiberty" 145 mkdir -p $_OUTDIR/$_libibertydir/arch/$_MACHINE_ARCH 146 147 getvars libiberty/Makefile \ 148 ALLOCA EXTRA_OFILES LIBOBJS REQUIRED_OFILES \ 149 | write_mk $_OUTDIRBASE/$_libibertydir/defs.mk 150 151 write_c $_OUTDIRBASE/$_libibertydir/arch/$_MACHINE_ARCH/config.h \ 152 <$_TMPDIR/libiberty/config.h 153} 154 155##### lib/libdecnumber ##### 156 157get_libdecnumber () { 158 _subdir="$1" 159 160 mkdir -p $_OUTDIR/usr.bin/$_subdir/arch/$_MACHINE_ARCH 161 write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$_MACHINE_ARCH/config.h \ 162 <$_TMPDIR/libdecnumber/config.h 163} 164 165##### lib/libgomp ##### 166 167get_libgomp () { 168 _subdir="$1" 169 170 mkdir -p $_OUTDIR/lib/$_subdir/arch/$_MACHINE_ARCH 171 172 getvars $_PLATFORM/libgomp/Makefile \ 173 libgomp_la_SOURCES \ 174 | write_mk $_OUTDIRBASE/lib/$_subdir/defs.mk 175 176 write_c $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/config.h \ 177 <$_TMPDIR/$_PLATFORM/libgomp/config.h 178 write_c $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/libgomp_f.h \ 179 <$_TMPDIR/$_PLATFORM/libgomp/libgomp_f.h 180 write_mk $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/libgomp.spec \ 181 <$_TMPDIR/$_PLATFORM/libgomp/libgomp.spec 182 write_c $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/omp.h \ 183 <$_TMPDIR/$_PLATFORM/libgomp/omp.h 184} 185 186##### lib/libbacktrace ##### 187 188get_libbacktrace () { 189 _subdir="$1" 190 191 mkdir -p $_OUTDIR/lib/$_subdir/arch/$_MACHINE_ARCH 192 write_c $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/config.h \ 193 <$_TMPDIR/$_PLATFORM/$_subdir/config.h 194 write_c $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/backtrace-supported.h \ 195 <$_TMPDIR/$_PLATFORM/$_subdir/backtrace-supported.h 196} 197 198##### lib/libobjc ##### 199 200get_libobjc () { 201 _subdir="$1/arch/$_MACHINE_ARCH" 202 _options="ALL_OPT_FILES" 203 204 mkdir -p $_OUTDIR/lib/$_subdir 205 206 { 207 if [ -n "$_options" ]; then 208 getvars gcc/Makefile $_options 209 fi 210 getvars $_PLATFORM/libobjc/Makefile \ 211 ALL_CFLAGS INCLUDES OBJC_SOURCE_FILES C_SOURCE_FILES OBJC_H \ 212 | sed "s,$_GNU_DIST,\${GNUHOSTDIST},g" 213 } | sanitise_includes \ 214 | write_mk $_OUTDIRBASE/lib/$_subdir/defs.mk 215 216 write_c $_OUTDIRBASE/lib/$_subdir/config.h \ 217 <$_TMPDIR/$_PLATFORM/libobjc/config.h 218} 219 220##### lib/libstdc++-v3 ##### 221 222get_libstdcxx_v3 () { 223 _subdir="$1" 224 _ver="$2" 225 226 mkdir -p $_OUTDIR/lib/$_subdir/arch/$_MACHINE_ARCH 227 228 _build_headers="c++config.h cxxabi_tweaks.h" 229 _headers1="c_base_headers_extra_install" 230 _headers1="$_headers1 tr1_headers tr2_headers decimal_headers c_compatibility_headers_install" 231 _headers1="$_headers1 debug_headers parallel_headers" 232 _headers2="host_headers thread_host_headers" 233 _pf_headers="profile_headers profile_impl_headers" 234 _pb_headers="pb_headers1 pb_headers2 pb_headers3 pb_headers4 pb_headers5 pb_headers6 pb_headers7" 235 236 # build files 237 for h in $_build_headers; do 238 write_c $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/$h \ 239 <$_TMPDIR/$_PLATFORM/libstdc++-v3/include/$_PLATFORM/bits/$h 240 done 241 242 write_c $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/gstdint.h \ 243 <$_TMPDIR/$_PLATFORM/libstdc++-v3/include/gstdint.h 244 write_c $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/symver-config.h \ 245 <$_TMPDIR/$_PLATFORM/libstdc++-v3/config.h 246 247 { 248 getvars $_PLATFORM/libstdc++-v3/Makefile \ 249 port_specific_symbol_files 250 getvars $_PLATFORM/libstdc++-v3/src/Makefile \ 251 cxx17_sources \ 252 cxx11_sources \ 253 cxx98_sources 254 255 # libsupc++ 256 getvars $_PLATFORM/libstdc++-v3/libsupc++/Makefile \ 257 sources | sed 's/^G_sources=/G_LIBSUPCXX_SOURCES=/' 258 getvars $_PLATFORM/libstdc++-v3/libsupc++/Makefile \ 259 c_sources | sed 's/^G_c_sources=/G_LIBSUPCXX_C_SOURCES=/' 260 261 # includes 262 getvars $_PLATFORM/libstdc++-v3/include/Makefile \ 263 c_base_headers std_headers | sed -e 's#/[^ ][^ ]*/##g' -e 's/\${GNUHOSTDIST}//g' 264 265 # src 266 getvars $_PLATFORM/libstdc++-v3/src/Makefile \ 267 libstdc___la_SOURCES | sed 's/^G_libstdc___la_SOURCES=/G_SRC_SOURCES=/' 268 getvars $_PLATFORM/libstdc++-v3/src/c++17/Makefile \ 269 libc__17convenience_la_SOURCES | \ 270 sed -e 's/^G_libc__17convenience_la_SOURCES=/G_CPP17_SOURCES=/' 271 getvars $_PLATFORM/libstdc++-v3/src/c++11/Makefile \ 272 libc__11convenience_la_SOURCES | \ 273 sed -e 's/^G_libc__11convenience_la_SOURCES=/G_CPP11_SOURCES=/' \ 274 -e 's/codecvt.cc/c11-codecvt.cc/' 275 getvars $_PLATFORM/libstdc++-v3/src/c++98/Makefile \ 276 GLIBCXX_ABI_FLAGS libc__98convenience_la_SOURCES | \ 277 sed -e 's/^G_libc__98convenience_la_SOURCES=/G_CPP98_SOURCES=/' \ 278 -e 's/codecvt.cc/c98-codecvt.cc/' 279 getvars $_PLATFORM/libstdc++-v3/src/filesystem/Makefile \ 280 libstdc__fs_la_SOURCES | \ 281 sed -e 's/^G_libstdc__fs_la_SOURCES=/G_FILESYSTEM_SOURCES=/' 282 getvars $_PLATFORM/libstdc++-v3/Makefile ATOMICITY_SRCDIR \ 283 BASIC_FILE_CC CLOCALE_CC CCODECVT_CC CCOLLATE_CC \ 284 CCTYPE_CC CMESSAGES_CC CMONEY_CC CNUMERIC_CC CTIME_CC \ 285 CPU_OPT_BITS_RANDOM 286 287 # includes 288 getvars $_PLATFORM/libstdc++-v3/include/Makefile \ 289 backward_headers c_base_headers_extra $_headers1 $_pb_headers | \ 290 sed -e 's#\${GNUHOSTDIST}/libstdc++-v3/include/##g' 291 getvars $_PLATFORM/libstdc++-v3/include/Makefile \ 292 bits_headers ext_headers $_headers2 | \ 293 sed -e 's#\${GNUHOSTDIST}/libstdc++-v3/include/##g' -e 's#\${GNUHOSTDIST}/libstdc++-v3/config/##g' 294 getvars $_PLATFORM/libstdc++-v3/include/Makefile \ 295 $_pf_headers | sed -e 's#\${GNUHOSTDIST}/libstdc++-v3/include/profile/##g' 296 getvars $_PLATFORM/libstdc++-v3/include/Makefile \ 297 BASIC_FILE_H ALLOCATOR_H CSTDIO_H CLOCALE_H CMESSAGES_H CTIME_H 298 } | sanitise_includes \ 299 | write_mk $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/defs.mk 300} 301 302##### lib/libsanitizer ##### 303 304get_libsanitizer () { 305 _subdir="$1" 306 307 mkdir -p $_OUTDIR/lib/$_subdir/arch/$_MACHINE_ARCH 308 309 { 310 getvars $_PLATFORM/libsanitizer/asan/Makefile \ 311 asan_files 312 getvars $_PLATFORM/libsanitizer/lsan/Makefile \ 313 lsan_files 314 getvars $_PLATFORM/libsanitizer/tsan/Makefile \ 315 tsan_plugin_files 316 getvars $_PLATFORM/libsanitizer/ubsan/Makefile \ 317 ubsan_plugin_files 318 319 } | sanitise_includes \ 320 | write_mk $_OUTDIRBASE/lib/$_subdir/arch/$_MACHINE_ARCH/defs.mk 321} 322 323##### usr.bin/gcc* ##### 324 325get_gcc_bootstrap () { 326 _subdir="$1" 327 mkdir -p $_OUTDIR/usr.bin/$_subdir/arch/$_MACHINE_ARCH 328 for f in auto-host tm config; do 329 write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$_MACHINE_ARCH/$f.h <$_TMPDIR/gcc/$f.h 330 done 331 # XXXGCC5 don't really want to copy insn-modes as we build 332 # it but libgcc needs to too early yet 333 for f in insn-modes; do 334 write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$_MACHINE_ARCH/$f.h <$_TMPDIR/gcc/$f.h 335 done 336} 337 338get_gcc () { 339 _subdir="$1" 340 mkdir -p $_OUTDIR/usr.bin/$_subdir/arch/$_MACHINE_ARCH 341 mkdir -p $_OUTDIR/usr.bin/libcpp/arch/$_MACHINE_ARCH 342 mkdir -p $_OUTDIR/usr.bin/include/arch 343 mkdir -p $_OUTDIR/usr.bin/common-target/arch 344 _buildname="BUILD_" 345 _libcppsubdir="" 346 _extravars="TM_H ALL_OPT_FILES" 347 _hconfig_h="" 348 _extravars2="tm_file_list build_xm_include_list" 349 _extravars3="tm_p_include_list" 350 351 { 352 getvars gcc/Makefile \ 353 ${_buildname}EARLY_SUPPORT ${_buildname}ERRORS ${_buildname}PRINT \ 354 ${_buildname}RTL ${_buildname}SUPPORT ${_buildname}VARRAY \ 355 ${_buildname}MD | \ 356 sed -e 's#build/errors.o#build-errors.o#g' \ 357 -e 's#build/print-rtl.o#build-print-rtl.o#g' \ 358 -e 's#build/rtl.o#build-rtl.o#g' \ 359 -e 's#build/varray.o#build-varray.o#g' \ 360 -e 's#build/ggc-none.o#build-ggc-none.o#g' \ 361 -e 's#build/##g' 362 getvars gcc/Makefile \ 363 ALL_CFLAGS ALL_CPPFLAGS C_AND_OBJC_OBJS C_OBJS CCCP_OBJS \ 364 GCC_OBJS GCOV_OBJS GCOV_DUMP_OBJS GXX_OBJS GTM_H PROTO_OBJS ${_extravars1} \ 365 INCLUDES md_file OBJC_OBJS OBJS out_file version \ 366 BUILD_PREFIX RTL_H RTL_BASE_H TREE_H ${_hconfig_h} BASIC_BLOCK_H GCC_H \ 367 D_TARGET_DEF \ 368 GTFILES_SRCDIR GTFILES_FILES_FILES GTFILES_FILES_LANGS \ 369 GTFILES GTFILES_LANG_DIR_NAMES HASH_TABLE_H \ 370 NOEXCEPTION_FLAGS NATIVE_SYSTEM_HEADER_DIR \ 371 tm_defines host_xm_file host_xm_defines tm_p_file \ 372 target_cpu_default ${_extravars} ${_extravars2} \ 373 lang_specs_files ${_extravars3} \ 374 common_out_file \ 375 | sanitise_includes 376 getvars gcc/Makefile \ 377 LIB2ADDEHDEP | sed 's/unwind.inc//' 378 getvars gcc/Makefile \ 379 CXX_OBJS CXX_C_OBJS | sed 's/cp\///g' 380 getvars gcc/Makefile \ 381 F77_OBJS | sed 's/f\///g' 382 getvars libcpp/Makefile \ 383 libcpp_a_OBJS 384 getvars gcc/Makefile \ 385 ENABLE_SHARED 386 echo G_SHLIB_LINK="$CC -shared" 387 echo G_SHLIB_MULTILIB=. 388 } | write_mk $_OUTDIRBASE/usr.bin/$_subdir/arch/$_MACHINE_ARCH/defs.mk 389 390 getvars gcc/Makefile \ 391 EXTRA_HEADERS \ 392 | write_mk $_OUTDIRBASE/usr.bin/include/arch/$_MACHINE_ARCH.mk 393 394 getvars gcc/Makefile \ 395 OBJS-libcommon \ 396 | write_mk $_OUTDIRBASE/usr.bin/common/defs.mk 397 getvars gcc/Makefile \ 398 OBJS-libcommon-target \ 399 | write_mk $_OUTDIRBASE/usr.bin/common-target/arch/$_MACHINE_ARCH.mk 400 401 write_c $_OUTDIRBASE/usr.bin/libcpp/arch/$_MACHINE_ARCH/config.h <$_TMPDIR/libcpp/config.h 402 hfiles='auto-host configargs config bconfig bversion plugin-version multilib tm' 403 for f in $hfiles; do 404 write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$_MACHINE_ARCH/$f.h <$_TMPDIR/gcc/$f.h 405 if [ "${_MACHINE_ARCH}" = "powerpc" -a "${f}" = "configargs" ] 406 then 407 ex <<__EOF__ $_OUTDIR/usr.bin/$_subdir/arch/$_MACHINE_ARCH/$f.h 408/configuration_arguments/ s/$// 409ya 410i 411#ifdef _SOFT_FLOAT 412. 413pu 414s/";$/ -with-float=soft";/ 415a 416#else 417#endif 418. 419. m +1 420/configure_default_options/ s/{ NULL.*$// 421a 422#ifdef _SOFT_FLOAT 423 { "float", "soft" }, 424#endif 425 { NULL, NULL } 426}; 427. 428wq 429__EOF__ 430 fi 431 if [ "${f}" = "configargs" ] 432 then 433 _srcquoted=$(echo "$_SRC" | sed 's/\//\\\//g') 434 sed -i -E -e "s,$_srcquoted,/usr/src,g" \ 435 -e 's/--build=[^ ]+ --host=([^ ]+)/--build=\1 --host=\1/' \ 436 $_OUTDIR/usr.bin/$_subdir/arch/$_MACHINE_ARCH/$f.h 437 fi 438 done 439 440 # keep identical 441 for f in all-tree.def; do 442 cp $_TMPDIR/gcc/$f $_OUTDIR/usr.bin/$_subdir/arch/$_MACHINE_ARCH/$f 443 done 444 445 # special transforms 446 for f in gtyp-input.list; do 447 sed -e "s@^.*$_OUTDIRBASE/dist@SRCDIR@" < $_TMPDIR/gcc/$f > $_OUTDIR/usr.bin/$_subdir/arch/$_MACHINE_ARCH/$f 448 done 449 450 # special platforms 451 if [ "${_MACHINE_ARCH}" = "sh3el" -o "${_MACHINE_ARCH}" = "sh3eb" ]; then 452 write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$_MACHINE_ARCH/sysroot-suffix.h <$_TMPDIR/gcc/sysroot-suffix.h 453 fi 454 455 if [ "${_MACHINE_ARCH}" = "i386" -o "${_MACHINE_ARCH}" = "x86_64" ]; then 456 write_c $_OUTDIRBASE/usr.bin/$_subdir/arch/$_MACHINE_ARCH/i386-builtin-types.inc <$_TMPDIR/gcc/i386-builtin-types.inc 457 fi 458 459 case "${_MACHINE_ARCH}" in 460 (*arm*) 461 d=$_OUTDIRBASE/usr.bin/$_subdir/arch/${_MACHINE_ARCH} 462 for f in arm-cpu.h arm-cpu-cdata.h arm-cpu-data.h arm-isa.h; do 463 write_c $d/$f <$_TMPDIR/gcc/$f 464 done 465 ;; 466 esac 467} 468 469##### main ##### 470 471case "$1" in 472# .mk and .h files for libgcc bootstrap (from host build) 473 474libgcc*-bootstrap) 475 get_libgcc gcc 476 get_libgcov gcc $_PLATFORM/libgcc/Makefile 477 get_gcc_bootstrap gcc 478 exit 0 479 ;; 480 481libstdc++-bootstrap) 482 get_libstdcxx_v3 libstdc++-v3 gcc 483 exit 0 484 ;; 485 486gcc*) 487 get_gcc gcc 488 get_libgcc gcc 489 get_libgcov gcc $_PLATFORM/libgcc/Makefile 490 get_gcc_bootstrap gcc 491 get_gcc_libiberty gcc 492 get_libobjc libobjc 493 get_libstdcxx_v3 libstdc++-v3 gcc 494 # XXX not yet 495 # get_libsanitizer libsanitizer 496 get_libdecnumber libdecnumber 497 get_libgomp libgomp 498 get_libbacktrace libbacktrace 499 exit 0 500 ;; 501 502 503*) 504 echo invalid arguments; 505 exit 1 506 ;; 507esac 508