HACKS revision 1.75
1 # $NetBSD: HACKS,v 1.75 2006/05/24 23:18:56 christos Exp $ 2 # 3 # This file is intended to document workarounds for currently unsolved 4 # (mostly) compiler bugs. 5 # 6 # Format: 7 # hack title 8 # cdate creation date 9 # mdate mod date 10 # who responsible developer 11 # port ... 12 # affected ports, space separated, if not "all" 13 # file affected file : revision : line from : line to 14 # affected files and revision and line numbers describing hack 15 # multiple lines if necessary. 16 # pr NNNN ... 17 # problem reports this hack works around, if known. Space 18 # separated. 19 # regress src/regress/directory/where/test/found 20 # regression test directories, if available. 21 # descr 22 # insert short informal description (multi-line). (Longer ones 23 # should be in the PR database. More formal descriptions might 24 # be in the regress tree. See above). 25 # kcah 26 # closing bracket. 27 # 28 # this is a comment. 29 30 hack netstat ieee1394 address printing. 31 mdate 14 Nov 2000 32 who matt 33 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 34 descr 35 Because the current implementation of IP over IEEE1394, the 36 fw device address contains more than just the IEEE1394 EUI-64. 37 So when printing out IEEE1394 addresses, ignore the extra stuff. 38 kcah 39 40 hack xterm vs. libterm 41 mdate 01 Aug 2000 42 who jdc 43 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 44 pr 10383 45 descr 46 In order to extend the termcap string over 1023 bytes, a ZZ entry was 47 introduced to point to a memory location containing the full entry. 48 Without this hack, xterm will export a termcap containing the ZZ 49 entry, which will then be ignored by libterm. As xterm modifies the 50 exported termcap, this would cause those modifications to be ignored. 51 kcah 52 53 hack wi-at-big-endian-bus 54 cdate 15 Mar 2002 55 who martin 56 file dev/ic/wireg.h 57 descr Add an option to access the underlying bus in big endian byte order 58 to work around deficiencies in bus_space_{read,write}_* macros. 59 Those don't allow the implementation of a proper pcmcia bus space 60 tag. 61 kcah 62 63 hack specific knowledge of colours in curses code 64 cdate Sun Apr 6 11:05:24 BST 2003 65 who jdc 66 file lib/libcurses/color.c : r1.24 67 descr 68 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 69 Fix is to enhance libtermcap to understand terminfo-style % sequences. 70 See also: 71 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 72 kcah 73 74 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 75 cdate 21 Aug 2003 76 who he 77 file sys/miscfs/procfs/procfs_linux.c : 1.14 78 descr 79 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 80 literals/constants, but refer to variables of a type which is 81 not "unsigned long", causing compilation of procfs_linux.c to 82 fail with "makes integer from pointer without a cast". This 83 is observed on e.g. the sun3 port. Ideally the "types" for 84 symbols should be consistent across all ports. 85 kcah 86 87 hack GCC2 isn't C99 88 cdate 5 December 2003 89 who mrg 90 file gnu/dist/binutils/ld/ldlex.c: r1.2 91 descr 92 ldlex.c is generated from ldlex.l and we get macro redefinition 93 errors from it if __STDC_VERSION__ is not C99 compliant. This 94 hack forces NetBSD 1.6 and later systems to also include <stdint.h> 95 to get the relevant definitions. This hack should be backed out 96 when all platforms have switched away from GCC2. 97 kcah 98 99 hack gcc-strict-aliasing 100 cdate 6 August 2004 101 who junyoung 102 pr 26516 103 file src/usr.sbin/racoon/racoon/Makefile : 1.21 104 descr 105 GCC issues a warning "dereferencing type-punned pointer will break 106 strict-aliasing rules" when compiling 107 crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this 108 is due to use of type casting in a non-standard way in the code and 109 not a compiler bug. Once a new release of KAME with a proper fix 110 applied is imported this should be backed out. 111 kcah 112 113 hack gcc 3.3.3 wrong uninitialised variable 114 mdate 12 May 2006 115 who he 116 file usr.bin/msgc/msg_sys.def : 1.33-1.34 117 file distrib/utils/sysinst/aout2elf.c : 1.11 118 descr 119 Gcc 3.3.3 gets some -Wuninitialized warnings wrong. This is 120 just one of many in the tree, marked with 121 /* XXX -Wuninitialized [arch] */ 122 in the source. 123 kcah 124 125 hack gcc4 wrong uninitialised variable 126 mdate 10 May 2006 127 who mrg 128 file bin/ksh/eval.c : 1.6 129 file bin/sh/histedit.c : 1.39 130 file bin/sh/parser.c : 1.60 131 file bin/systrace/systrace.c : 1.33 132 file crypto/dist/heimdal/kdc/524.c : 1.10 133 file crypto/dist/ssh/sftp.c : 1.20 134 file crypto/dist/ssh/ssh-keysign.c : 1.11 135 file dist/ipf/lib/hostname.c : 1.2 136 file dist/ipf/tools/ipmon.c : 1.8 137 file dist/ntp/ntpd/ntp_request.c : 1.4 138 file dist/ntp/ntpd/refclock_shm.c : 1.4 139 file dist/ntp/sntp/timing.c : 1.3 140 file dist/pppd/pppstats/pppstats.c : 1.3 141 file dist/smbfs/lib/smb/rap.c : 1.6 142 file dist/tcpdump/print-zephyr.c : 1.5 143 file distrib/utils/sysinst/aout2elf.c : 1.12 144 file gnu/libexec/uucp/uucico/uucico.c : 1.6 145 file lib/libc/citrus/citrus_csmapper.c : 1.6 146 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 147 file lib/libc/inet/inet_cidr_ntop.c : 1.3 148 file lib/libc/inet/inet_ntop.c : 1.3 149 file lib/libc/stdio/vfwprintf.c : 1.8 150 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 151 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 152 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 153 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 154 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 155 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 156 file sbin/fsck_ext2fs/dir.c : 1.19 157 file sbin/routed/rtquery/rtquery.c : 1.18 158 file sys/arch/amd64/amd64/pmap.c : 1.26 159 file sys/crypto/cast128/cast128.c : 1.9 160 file sys/ddb/db_command.c : 1.86 161 file sys/dev/cardbus/cardbus_map.c : 1.21 162 file sys/dev/fss.c : 1.25 163 file sys/dev/ic/igsfb.c : 1.39 164 file sys/dev/ic/mb86950.c : 1.5 165 file sys/dev/ic/midway.c : 1.71 166 file sys/dev/kttcp.c : 1.18 167 file sys/dev/rasops/rasops_bitops.h : 1.9 168 file sys/dev/pci/cmpci.c : 1.31 169 file sys/dev/pci/machfb.c : 1.45 170 file sys/dev/usb/ohci.c : 1.174 171 file sys/dev/usb/uhci.c : 1.196 172 file sys/dev/rasops/rasops_bitops.h : 1.9 173 file sys/dist/ipf/netinet/ip_nat.c : 1.10 174 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 175 file sys/dist/pf/net/pf.c : 1.22 176 file sys/fs/udf/udf_vnops.c : 1.4 177 file sys/kern/kern_sig.c : 1.219 178 file sys/kern/tty.c : 1.181 179 file sys/net/bpf.c : 1.116 180 file sys/net/zlib.c : 1.26 181 file sys/netccitt/if_x25subr.c : 1.37 182 file sys/netinet/in.c : 1.107 183 file sys/netsmb/smb_smb.c : 1.27 184 file sys/netsmb/smb_trantcp.c : 1.22 185 file sys/nfs/nfs_serv.c : 1.108 186 file sys/nfs/nfs_socket.c : 1.129 187 file sys/nfs/nfs_syscalls.c : 1.91 188 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 189 file usr.bin/ftp/ftp.c : 1.140 190 file usr.bin/find/function.c : 1.54 191 file usr.bin/mail/tty.c : 1.20 192 file usr.bin/nl/nl.c : 1.7 193 file usr.bin/systat/keyboard.c : 1.23 194 file usr.bin/usbhidctl/usbhid.c : 1.29 195 file usr.bin/vi/cl/cl_read.c : 1.5 196 file usr.bin/vi/ex/ex_cscope.c : 1.12 197 file usr.bin/vi/ex/ex_tag.c : 1.19 198 file usr.bin/vi/vi/v_txt.c : 1.15 199 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 200 file usr.sbin/cron/do_command.c : 1.19 201 file usr.sbin/timed/timed/slave.c : 1.15 202 descr 203 GCC 4.1 gets many uninitialised variable warnings wrong. We should 204 really audit all the old hacks like this when older compilers are 205 removed from the tree, as many are probably no longer required. 206 The problem is that it does not recognize initialization via function 207 call pointer. I.e. 208 int p; 209 foo(&p); 210 does not mark p as initialized. 211 kcah 212 213 hack gcc4 pointer sign and strict aliasing problems 214 mdate 10 May 2006 215 who mrg 216 file bin/ed/Makefile : 1.33 217 file bin/systrace/Makefile : 1.12 218 file distrib/utils/sysinst/Makefile.inc : 1.44 219 file games/bcd/Makefile : 1.5 220 file games/dab/Makefile : 1.5 221 file games/larn/Makefile : 1.17 222 file games/pom/Makefile : 1.5 223 file lib/libasn1/Makefile : 1.26 224 file lib/libcrypt/Makefile : 1.17 225 file lib/libgssapi/Makefile : 1.16 226 file lib/libhdb/Makefile : 1.20 227 file lib/libkadm5clnt/Makefile : 1.21 228 file lib/libkadm5srv/Makefile : 1.25 229 file lib/libkrb5/Makefile : 1.35 230 file lib/libssh/Makefile : 1.6 231 file lib/libtelnet/Makefile : 1.26 232 file libexec/getty/Makefile : 1.14 233 file libexec/kadmind/Makefile : 1.19 234 file libexec/kpasswdd/Makefile : 1.14 235 file sbin/atactl/Makefile : 1.3 236 file sbin/cgdconfig/Makefile : 1.7 237 file sbin/clri/Makefile : 1.13 238 file sbin/dkctl/Makefile : 1.4 239 file sbin/dump/Makefile : 1.33 240 file sbin/fdisk/Makefile : 1.35 241 file sbin/fsck_ext2fs/Makefile : 1.11 242 file sbin/fsck_ffs/Makefile : 1.29 243 file sbin/fsdb/Makefile : 1.18 244 file sbin/mount_smbfs/Makefile : 1.4 245 file sbin/newfs/Makefile : 1.30 246 file sbin/newfs_sysvbfs/Makefile : 1.2 247 file sbin/restore/Makefile : 1.23 248 file sbin/veriexecctl/Makefile : 1.11 249 file sys/lib/libsa/Makefile : 1.59 250 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 251 file usr.bin/awk/Makefile : 1.9 252 file usr.bin/crontab/Makefile : 1.24 253 file usr.bin/ctags/Makefile : 1.8 254 file usr.bin/gzip/Makefile : 1.10 255 file usr.bin/ssh/sftp/Makefile : 1.10 256 file usr.bin/ssh/ssh/Makefile : 1.25 257 file usr.bin/vi/build/Makefile : 1.26 258 file usr.bin/telnet/Makefile : 1.40 259 file usr.bin/tn3270/tn3270/Makefile : 1.36 260 file usr.bin/tr/Makefile : 1.4 261 file usr.sbin/amd/amd/Makefile : 1.27 262 file usr.sbin/amd/amq/Makefile : 1.14 263 file usr.sbin/amd/libamu/Makefile : 1.20 264 file usr.sbin/amd/pawd/Makefile : 1.5 265 file usr.sbin/bind/Makefile.inc : 1.22 266 file usr.sbin/bind/libdns/Makefile : 1.3 267 file usr.sbin/bind/named/Makefile : 1.17 268 file usr.sbin/bootp/bootptest/Makefile : 1.2 269 file usr.sbin/chrtbl/Makefile : 1.6 270 file usr.sbin/cron/Makefile : 1.12 271 file usr.sbin/dhcp/Makefile.inc : 1.20 272 file usr.sbin/dumplfs/Makefile : 1.11 273 file usr.sbin/hprop/Makefile : 1.13 274 file usr.sbin/installboot/Makefile : 1.35 275 file usr.sbin/ipf/ipftest/Makefile : 1.32 276 file usr.sbin/isdn/isdnd/Makefile : 1.6 277 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 278 file usr.sbin/isdn/isdntel/Makefile : 1.2 279 file usr.sbin/isdn/isdntrace/Makefile : 126 280 file usr.sbin/mopd/common/Makefile : 1.10 281 file usr.sbin/mopd/mopd/Makefile : 1.9 282 file usr.sbin/mopd/mopprobe/Makefile : 1.7 283 file usr.sbin/makefs/Makefile : 1.17 284 file usr.sbin/mscdlabel/Makefile : 1.5 285 file usr.sbin/pkg_install/add/Makefile : 1.7 286 file usr.sbin/pkg_install/create/Makefile : 1.5 287 file usr.sbin/pkg_install/lib/Makefile : 1.28 288 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 289 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 290 file usr.sbin/pppd/Makefile.inc : 1.3 291 file usr.sbin/pppd/pppd/Makefile : 1.38 292 file usr.sbin/rarpd/Makefile : 1.10 293 file usr.sbin/rbootd/Makefile : 1.10 294 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 295 file usr.sbin/rtadvd/Makefile : 1.9 296 file usr.sbin/tcpdump/Makefile : 1.42 297 file usr.sbin/wiconfig/Makefile : 1.3 298 descr 299 GCC 4.1 warns on pointer sign comparision/assignments and lots of 300 code does not conform. For now we use -Wno-pointer-sign and 301 -fno-strict-aliasing. 302 kcah 303 304 port vax 305 306 hack gcc 2.95/vax doesn't like abort being used as function pointer 307 cdate Tue Dec 13 05:54:50 GMT 2005 308 who jmc 309 file lib/libc/rpc/svc_vc.c 1.15 310 descr 311 Provide a local definition for abort which doesn't include 312 the noreturn attribute which trips up gcc 2.95 on vax. 313 314 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 315 cdate Mon May 9 12:16:22 CDT 2005 316 who jmc 317 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 318 gnu/usr.bin/gettext/libgrep/Makefile 1.3 319 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 320 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 321 descr 322 The latest gettext assumes a C99 environment or at least 323 configure checks to work around this. As we don't use configure 324 provide a stdbool.h for vax builds locally in directories from 325 the template provided by the gettext code. 326 327 hack gcc 2.95/vax can't handle __used__ 328 cdate Fri May 6 14:30:53 CDT 2005 329 who jmc 330 file src/lib/libc/gmon/mcount.c 1.17 331 src/usr.bin/config/main.c 1.11 332 descr 333 Recent changes to mark this as __used__ to prevent optimization 334 away on sparc64 don't work on 2.95 vax. Ifdef'd back in the 335 old __unused__ if on vax. 336 337 hack gcc 2.95/vax cannot handle __builtin_ffs() 338 cdate Fri Aug 23 21:31:15 CEST 2002 339 who ragge 340 file sys/lib/libkern/libkern.h : 1.42 341 descr 342 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 343 added this feature to GCC 3 so it can be removed when switching. 344 345 346 hack gcc-vax-libbz2 347 mdate 27 Jun 2002 348 who thorpej 349 file lib/libbz2/Makefile 350 descr 351 libbz2 is mis-compiled with optimization with GCC 2.95.3 352 on VAX. -O0 works around this problem. 353 kcah 354 355 hack gawk 356 mdate 8 Nov 2003 357 who ragge 358 file gnu/usr.bin/gawk/Makefile 359 descr 360 gawk is mis-compiled with optimization with GCC 2.95.3 361 on VAX. -O0 works around this problem. 362 kcah 363 364 hack vax Toolchain bug 365 cdate 28 Mar 2003 366 who he 367 file sys/arch/vax/vax/intvec.S : 1.5 368 descr 369 Workaround for PR toolchain/20924. The assembler apparently 370 tries to range-check byte offsets when it doesn't have 371 sufficient information to make that decision. 372 Workaround uses `brw' instead of `brb' instruction. 373 kcah 374 375 hack vax gcc 2.95.3 -Wuninitialized workarounds 376 cdate 6 Nov 2003 377 who he 378 file sys/dev/bi/if_ni.c : 1.22 379 file sys/arch/vax/vax/ctu.c : 1.20 380 descr 381 Workaround for gcc 2.95.3 failing to detect that certain 382 variables will be initialized; so that this code compiles 383 with -Wuninitialized. Should be reviewed and possibly 384 reverted when gcc 3.3.2 is ready for vax. 385 kcah 386 387 hack vax gcc 2.95.3 structure initialization 388 cdat 13 May 2004 389 who cl 390 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 391 descr 392 Workaround for gcc 2.95.3 failing to initialize structures 393 and/or unions inside structures using nested designators. 394 Should be reverted when gcc >=3.3.3 is ready for vax. 395 kcah 396 397 hack vax gcc 2.95.3 needs -I. to build nslexer.c 398 cdat 6 Jun 2004 399 who mhitch 400 file lib/libc/arch/vax/Makefile.inc : 1.6 401 descr 402 It appears necessary to add -I. to CPPFLAGS when building 403 nslesxer.c. This may be caused by gcc 2.95.3 being used. 404 Should be reverted when a newer gcc is ready for vax. 405 kcah 406 407 hack vax gcc 2.95.3 doesn't understand "-std=c99" 408 cdat 5 April 2005 409 who tron 410 file src/share/mk/bsd.sys.mk 411 descr 412 We cannot use "-std=c99" for compiler warning level 4 and above 413 because gcc 2.95.3 doesn't support that option. 414 kcah 415 416 hack declare boolean_t in two IPF user-mode programs 417 cdate Tue Mar 7 19:19:20 CET 2006 418 who he 419 file dist/ipf/ipsend/iptests.c : 1.8 420 dist/ipf/ipsend/sock.c : 1.7 421 descr 422 The IPF user-mode programs ipsend and iptest first 423 include <sys/types.h> without _KERNEL defined, and 424 later include <sys/file.h> with _KERNEL defined. 425 This causes a build failure when building for vax, 426 since <sys/device.h> ends up being included without 427 bollean_t being defined by <sys/types.h>. 428 Build failure and further details documented in 429 PR#32907. 430 kcah 431 432 port sparc64 433 434 hack binutil-2.11-sparc64-pltrela 435 mdate 14 Aug 2001 436 who eeh 437 file libexec/ld.elf_so/arch/sparc64/mdreloc.c 438 descr 439 The first four PLT entries are reserved. There is some 440 disagreement whether they should have associated relocation 441 entries. Both the SPARC 32-bit and 64-bit ELF specifications 442 say that they should have relocation entries, but the 32-bit 443 SPARC binutils do not generate them, and now the 64-bit SPARC 444 binutils have stopped generating them too. 445 446 To provide binary compatibility, we will check the first entry, 447 if it is reserved it should not be of the type JMP_SLOT. If it 448 is JMP_SLOT, then the 4 reserved entries were not generated and 449 our index is 4 entries too far, so we frob the rela pointer. 450 kcah 451 452 453 port arm 454 455 hack gcc-unsigned-compare 456 cdate 09 Mar 2002 457 mdate 18 Mar 2002 458 who bjh21 459 file dist/bind/lib/nameser/ns_parse.c : 1.3 460 file dist/dhcp/minires/ns_parse.c : 1.3 461 file dist/dhcp/omapip/result.c : 1.2 462 file dist/dhcp/server/failover.c : 1.3 463 file gnu/dist/gawk/eval.c : 1.4 464 file gnu/dist/toolchain/bfd/bfd.c : 1.2 465 file gnu/dist/toolchain/bfd/format.c : 1.2 466 file gnu/dist/toolchain/gdb/target.c : 1.2 467 file sys/kern/vfs_subr.c : 1.172 468 descr When checking that a potentially-unsigned enum is >= 0, assign 469 it to an int first. This is necessary to avoid "comparison is 470 always true" warnings with -fshort-enums. Casting to an int 471 really should be enough, but turns out not to be. 472 kcah 473 474 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 475 cdate Tue Oct 28 18:02:16 GMT 2003 476 who skrll 477 pr 23044 478 file sys/arch/arm/conf/Makefile.arm : 1.19 479 descr 480 Performing a build.sh tools on a CATS with NFS mounted 481 obj and src directories results in "panic: receive 1" 482 The hack is to compile sys/kern/uipc_socket.c with 483 -fno-strict-aliasing 484 kcah 485 486 487 port pc532 488 489 hack egcs-pc532-ip6_mroute 490 cdate 09 Jul 2002 491 who simonb 492 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 493 file sys/arch/pc532/conf/files.pc532 : 1.47 494 descr 495 egcs 1.1.2 gets an "internal error--insn does not satisfy its 496 constraints" error compiling ip6_mroute.c with -O2 or greater. 497 -O1 works around this problem. 498 kcah 499 500 hack gcc-pc532-duffs_device 501 cdate Mon Oct 27 07:23:05 UTC 2003 502 who simonb 503 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 504 file sys/arch/pc532/conf/files.pc532 : 1.52 505 pr GCC PR optimization/5230 506 descr 507 gcc incorrectly gives an "unreachable code at beginning of 508 switch statement" for a Duff's device construct in 509 arch/pc532/dev/ncr.c. There is no way to disable just this 510 warning, so -Wno-error is turned on for this file. 511 kcah 512 513 hack gcc332-cppmacro-ice 514 cdate Sun Dec 7 12:48:33 UTC 2003 515 who simonb 516 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 517 descr 518 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 519 The hack is to use -O1 for this file. Fixed in gcc 520 -current mainline, unable to work out where the fix is 521 right now. 522 kcah 523 524 525 port sh3 526 527 hack gcc-sh3-sed 528 mdate 23 Apr 2002 529 who thorpej 530 file usr.bin/sed/Makefile : 1.9 : 9 : 13 531 descr 532 The in-tree GCC 2.95.3-based compiler ICEs when building 533 with optimization for SuperH. Hack is to build with -O0. 534 kcah 535 536 hack gcc4-sh3-bz2 537 mdate 20 May 2006 538 who mrg 539 file lib/libbz2/Makefile : 1.10 540 descr 541 The in-tree GCC 4.1-based compiler generated too-far 542 pc-relative addresses. Hack is to build with -O0. 543 kcah 544 545 546 port sh5 547 548 hack SuperH SH5 Toolchain Bugs 549 cdate 11 Jul 2002 550 who scw 551 file usr.sbin/ndbootd/ndbootd.c : 1.6 552 file usr.sbin/traceroute/traceroute.c : 1.48 553 descr 554 The SuperH SH5 toolchain (2.97-sh5-010522) gets an internal 555 compiler error when assigning a bit-wise inverted value 556 under some circumstances. 557 Work around it by splitting the statement into two. 558 kcah 559 560 hack SuperH SH5 Toolchain Bugs 561 cdate 17 May 2003 562 who scw 563 file lib/libpthread/pthread_lock.c : 1.7 564 descr 565 The SuperH SH5 toolchain generates incorrect PIC code when 566 faced with a symbol which is declared extern, but has local 567 scope due to being defined within an asm() statement (without 568 being declared .globl in that statement). Work around it by 569 adding the .globl. 570 kcah 571 572 hack gcc 3.3.2 on sh5 - ICE compiling reload1.c at -O2 573 cdate Sun Dec 7 19:44:05 GMT 2003 574 who scw 575 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 576 descr 577 Gcc3 for sh5 gets an ICE compiling reload1.c at -O2. 578 Drop to -O1 for now when building for sh5. 579 kcah 580 581 hack gcc 3.3.2 on sh5 - ICE compiling elf32.c/elf64.c at -O2 582 cdate Sun Dec 7 21:10:46 GMT 2003 583 who scw 584 file gnu/lib/libbfd/Makefile : 1.39 585 descr 586 Gcc3 for sh5 gets an ICE compiling libbfd's elf32.c 587 and elf64.c at -O2. 588 Drop to -O1 for now when building for sh5. 589 kcah 590 591 592 hack gcc 3.3.2 on sh5 - fatal warning compiling function.c 593 cdate Sun Dec 7 19:44:05 GMT 2003 594 who scw 595 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 596 descr 597 Gcc3 for sh5 issues a warning: 598 .../gnu/dist/gcc/gcc/function.c:4742: warning: `and' of 599 mutually exclusive equal-tests is always 0. 600 This causes the build to fail because of -Werror. 601 Work-around by defining NOGCCERROR when building for sh5. 602 kcah 603 604 hack gcc 3.3.3 on sh5 - ICE compiling rbtdb.c and rbtdb64.c 605 cdate Thu Nov 11 00:35:33 UTC 2004 606 who he 607 file usr.sbin/bind/libdns/Makefile/1.2 608 descr 609 Gcc3 for sh5 gets an ICE compiling these files at -O2. 610 Drop to -O1 for now when building for sh5. 611 kcah 612 613 hack gcc 3.3.3 nb3 on sh5 - ICE compiling bsd-comp.c 614 cdate Thu May 25 23:05:20 UTC 2005 615 who he 616 file sys/lkm/net/bsdcomp/Makefile : 1.3 617 descr 618 Gcc3 for sh5 gets an ICE compiling this at -O2, 619 "could not split insn". Drop to -O1 for sh5. 620 kcah 621 622 hack gcc 3.3.3 nb3 on sh5 - ICE compiling strtod.c 623 cdate Tue Jan 31 10:51:52 GMT 2006 624 who scw 625 file lib/libc/gdtoa/Makefile.inc : 1.2 626 descr 627 Gcc3 for sh5 gets an ICE compiling this at -O2, 628 "could not split insn". Drop to -O1 for sh5. 629 kcah 630 631 port sun2 632 633 hack gcc 3.3.2/mdsetimage 634 cdate Tue Oct 28 18:43:05 EST 2003 635 who fredette 636 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 637 descr 638 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 639 this hack uses -O0 to avoid the problem. 640 kcah 641 642 hack gcc 3.3.2/installboot/ffs.c 643 cdate Tue Oct 28 18:43:05 EST 2003 644 who fredette 645 file usr.sbin/installboot/Makefile : 1.26 646 descr 647 ffs.c causes cc1 to barf for as-yet unknown reasons. this 648 hack uses -O0 to avoid the problem. 649 kcah 650 651 652 port m68000 653 654 hack gcc 3.3.2/gcc/ra-colorize.c 655 cdate Wed Nov 5 11:03:13 EST 2003 656 who mrg 657 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 658 descr 659 ra-colorize.c causes a whole spew of unreferenced .L* local 660 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 661 Note this has been fixed in 3.3.3 at least on m68k, 662 but it hasn't been confirmed on sun2/m68000. 663 (it's too slow even on emulator and unlikely to build 664 toolchains on sun2 with its maximum 4MB RAM) 665 kcah 666 667 port sparc64 668 669 hack disable optimzations for uvm_bio.c on 32 bit kernels 670 cdate Sun Mar 21 14:14:04 MET 2004 671 who martin 672 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 673 file sys/arch/sparc64/conf/files.sparc64 : 1.93 674 descr 675 The sparc compiler miscompiles uvm_bio.c when using 676 any optimization. This results in ubc_release panics. 677 kcah 678 679 port macppc 680 681 hack remove inline from rotate_{left,right} 682 cdate Tue Feb 22 13:43:25 EST 2005 683 who christos 684 file src/dist/bind/lib/dns/rbt.c 685 descr 686 The macppc gcc-3.3 compiler miscompiles rbt.c when these 687 functions are inlined. The error is: 688 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 689 .* named[368]: exiting (due to assertion failure) 690 This is reportedly fixed in gcc-3.4 691 kcah 692 693 port hppa 694 695 hack hppa-gcc-3.3.3/grep/dfa.c 696 cdate Sun Aug 8 08:34:32 PDT 2004 697 who chs 698 file gnu/usr.bin/grep/grep/Makefile : 1.4 699 descr 700 gcc 3.3.3 generates bad code for dfa.c with -O2, 701 reduce optimization to -O1 to avoid the bug. 702 kcah 703 704 hack hppa-gcc-3.3.3 / make/buf.c 705 cdate Mon May 8 13:02:36 CEST 2006 706 who he 707 file usr.bin/make/Makefile : 1.34 708 descr 709 gcc 3.3.3 nb3 gets an "unrecognized insn" internal 710 compiler error when building this file with -O2, 711 reduce optimization to -O1 to avoid the bug. 712 kcah 713 714 hack hppa boot-from-disk memory corruption 715 cdate Wed May 18 06:56:07 PDT 2005 716 who chs 717 file src/sys/dev/scsipi/scsipiconf.h : 1.98 718 descr 719 There is some bug with DMA on hppa that corrupts scsipi_xfer 720 structures, but it only shows up when booting from disk. 721 For now, we'll add some padding to scsipi_xfer so that 722 the corrupted memory is not otherwise used. 723 kcah 724 725 port mips 726 727 hack mips-shared-linker-load-address 728 cdate Fri Oct 7 08:33:10 UTC 2005 729 who simonb 730 file src/sys/kern/exec_elf32.c : 1.107 731 descr 732 With COMPAT_16 or previous enabled (which enables 733 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 734 load and run at address 0. The check to fix this in 735 rev 1.107 only checks the first psection of the ELF 736 executable, which may not be loadable. A more correct 737 fix is to check the first loadable psection instead of 738 just the first psection. 739 kcah 740 741
Indexes created Wed Nov 05 22:09:55 GMT 2025