HACKS revision 1.74
1 # $NetBSD: HACKS,v 1.74 2006/05/21 04:19:12 mrg 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__ in mcount.c 328 cdate Fri May 6 14:30:53 CDT 2005 329 who jmc 330 file src/lib/libc/gmon/mcount.c 1.17 331 descr 332 Recent changes to mark this as __used__ to prevent optimization 333 away on sparc64 don't work on 2.95 vax. Ifdef'd back in the 334 old __unused__ if on vax. 335 336 hack gcc 2.95/vax cannot handle __builtin_ffs() 337 cdate Fri Aug 23 21:31:15 CEST 2002 338 who ragge 339 file sys/lib/libkern/libkern.h : 1.42 340 descr 341 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 342 added this feature to GCC 3 so it can be removed when switching. 343 344 345 hack gcc-vax-libbz2 346 mdate 27 Jun 2002 347 who thorpej 348 file lib/libbz2/Makefile 349 descr 350 libbz2 is mis-compiled with optimization with GCC 2.95.3 351 on VAX. -O0 works around this problem. 352 kcah 353 354 hack gawk 355 mdate 8 Nov 2003 356 who ragge 357 file gnu/usr.bin/gawk/Makefile 358 descr 359 gawk is mis-compiled with optimization with GCC 2.95.3 360 on VAX. -O0 works around this problem. 361 kcah 362 363 hack vax Toolchain bug 364 cdate 28 Mar 2003 365 who he 366 file sys/arch/vax/vax/intvec.S : 1.5 367 descr 368 Workaround for PR toolchain/20924. The assembler apparently 369 tries to range-check byte offsets when it doesn't have 370 sufficient information to make that decision. 371 Workaround uses `brw' instead of `brb' instruction. 372 kcah 373 374 hack vax gcc 2.95.3 -Wuninitialized workarounds 375 cdate 6 Nov 2003 376 who he 377 file sys/dev/bi/if_ni.c : 1.22 378 file sys/arch/vax/vax/ctu.c : 1.20 379 descr 380 Workaround for gcc 2.95.3 failing to detect that certain 381 variables will be initialized; so that this code compiles 382 with -Wuninitialized. Should be reviewed and possibly 383 reverted when gcc 3.3.2 is ready for vax. 384 kcah 385 386 hack vax gcc 2.95.3 structure initialization 387 cdat 13 May 2004 388 who cl 389 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 390 descr 391 Workaround for gcc 2.95.3 failing to initialize structures 392 and/or unions inside structures using nested designators. 393 Should be reverted when gcc >=3.3.3 is ready for vax. 394 kcah 395 396 hack vax gcc 2.95.3 needs -I. to build nslexer.c 397 cdat 6 Jun 2004 398 who mhitch 399 file lib/libc/arch/vax/Makefile.inc : 1.6 400 descr 401 It appears necessary to add -I. to CPPFLAGS when building 402 nslesxer.c. This may be caused by gcc 2.95.3 being used. 403 Should be reverted when a newer gcc is ready for vax. 404 kcah 405 406 hack vax gcc 2.95.3 doesn't understand "-std=c99" 407 cdat 5 April 2005 408 who tron 409 file src/share/mk/bsd.sys.mk 410 descr 411 We cannot use "-std=c99" for compiler warning level 4 and above 412 because gcc 2.95.3 doesn't support that option. 413 kcah 414 415 hack declare boolean_t in two IPF user-mode programs 416 cdate Tue Mar 7 19:19:20 CET 2006 417 who he 418 file dist/ipf/ipsend/iptests.c : 1.8 419 dist/ipf/ipsend/sock.c : 1.7 420 descr 421 The IPF user-mode programs ipsend and iptest first 422 include <sys/types.h> without _KERNEL defined, and 423 later include <sys/file.h> with _KERNEL defined. 424 This causes a build failure when building for vax, 425 since <sys/device.h> ends up being included without 426 bollean_t being defined by <sys/types.h>. 427 Build failure and further details documented in 428 PR#32907. 429 kcah 430 431 port sparc64 432 433 hack binutil-2.11-sparc64-pltrela 434 mdate 14 Aug 2001 435 who eeh 436 file libexec/ld.elf_so/arch/sparc64/mdreloc.c 437 descr 438 The first four PLT entries are reserved. There is some 439 disagreement whether they should have associated relocation 440 entries. Both the SPARC 32-bit and 64-bit ELF specifications 441 say that they should have relocation entries, but the 32-bit 442 SPARC binutils do not generate them, and now the 64-bit SPARC 443 binutils have stopped generating them too. 444 445 To provide binary compatibility, we will check the first entry, 446 if it is reserved it should not be of the type JMP_SLOT. If it 447 is JMP_SLOT, then the 4 reserved entries were not generated and 448 our index is 4 entries too far, so we frob the rela pointer. 449 kcah 450 451 452 port arm 453 454 hack gcc-unsigned-compare 455 cdate 09 Mar 2002 456 mdate 18 Mar 2002 457 who bjh21 458 file dist/bind/lib/nameser/ns_parse.c : 1.3 459 file dist/dhcp/minires/ns_parse.c : 1.3 460 file dist/dhcp/omapip/result.c : 1.2 461 file dist/dhcp/server/failover.c : 1.3 462 file gnu/dist/gawk/eval.c : 1.4 463 file gnu/dist/toolchain/bfd/bfd.c : 1.2 464 file gnu/dist/toolchain/bfd/format.c : 1.2 465 file gnu/dist/toolchain/gdb/target.c : 1.2 466 file sys/kern/vfs_subr.c : 1.172 467 descr When checking that a potentially-unsigned enum is >= 0, assign 468 it to an int first. This is necessary to avoid "comparison is 469 always true" warnings with -fshort-enums. Casting to an int 470 really should be enough, but turns out not to be. 471 kcah 472 473 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 474 cdate Tue Oct 28 18:02:16 GMT 2003 475 who skrll 476 pr 23044 477 file sys/arch/arm/conf/Makefile.arm : 1.19 478 descr 479 Performing a build.sh tools on a CATS with NFS mounted 480 obj and src directories results in "panic: receive 1" 481 The hack is to compile sys/kern/uipc_socket.c with 482 -fno-strict-aliasing 483 kcah 484 485 486 port pc532 487 488 hack egcs-pc532-ip6_mroute 489 cdate 09 Jul 2002 490 who simonb 491 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 492 file sys/arch/pc532/conf/files.pc532 : 1.47 493 descr 494 egcs 1.1.2 gets an "internal error--insn does not satisfy its 495 constraints" error compiling ip6_mroute.c with -O2 or greater. 496 -O1 works around this problem. 497 kcah 498 499 hack gcc-pc532-duffs_device 500 cdate Mon Oct 27 07:23:05 UTC 2003 501 who simonb 502 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 503 file sys/arch/pc532/conf/files.pc532 : 1.52 504 pr GCC PR optimization/5230 505 descr 506 gcc incorrectly gives an "unreachable code at beginning of 507 switch statement" for a Duff's device construct in 508 arch/pc532/dev/ncr.c. There is no way to disable just this 509 warning, so -Wno-error is turned on for this file. 510 kcah 511 512 hack gcc332-cppmacro-ice 513 cdate Sun Dec 7 12:48:33 UTC 2003 514 who simonb 515 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 516 descr 517 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 518 The hack is to use -O1 for this file. Fixed in gcc 519 -current mainline, unable to work out where the fix is 520 right now. 521 kcah 522 523 524 port sh3 525 526 hack gcc-sh3-sed 527 mdate 23 Apr 2002 528 who thorpej 529 file usr.bin/sed/Makefile : 1.9 : 9 : 13 530 descr 531 The in-tree GCC 2.95.3-based compiler ICEs when building 532 with optimization for SuperH. Hack is to build with -O0. 533 kcah 534 535 hack gcc4-sh3-bz2 536 mdate 20 May 2006 537 who mrg 538 file lib/libbz2/Makefile : 1.10 539 descr 540 The in-tree GCC 4.1-based compiler generated too-far 541 pc-relative addresses. Hack is to build with -O0. 542 kcah 543 544 545 port sh5 546 547 hack SuperH SH5 Toolchain Bugs 548 cdate 11 Jul 2002 549 who scw 550 file usr.sbin/ndbootd/ndbootd.c : 1.6 551 file usr.sbin/traceroute/traceroute.c : 1.48 552 descr 553 The SuperH SH5 toolchain (2.97-sh5-010522) gets an internal 554 compiler error when assigning a bit-wise inverted value 555 under some circumstances. 556 Work around it by splitting the statement into two. 557 kcah 558 559 hack SuperH SH5 Toolchain Bugs 560 cdate 17 May 2003 561 who scw 562 file lib/libpthread/pthread_lock.c : 1.7 563 descr 564 The SuperH SH5 toolchain generates incorrect PIC code when 565 faced with a symbol which is declared extern, but has local 566 scope due to being defined within an asm() statement (without 567 being declared .globl in that statement). Work around it by 568 adding the .globl. 569 kcah 570 571 hack gcc 3.3.2 on sh5 - ICE compiling reload1.c at -O2 572 cdate Sun Dec 7 19:44:05 GMT 2003 573 who scw 574 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 575 descr 576 Gcc3 for sh5 gets an ICE compiling reload1.c at -O2. 577 Drop to -O1 for now when building for sh5. 578 kcah 579 580 hack gcc 3.3.2 on sh5 - ICE compiling elf32.c/elf64.c at -O2 581 cdate Sun Dec 7 21:10:46 GMT 2003 582 who scw 583 file gnu/lib/libbfd/Makefile : 1.39 584 descr 585 Gcc3 for sh5 gets an ICE compiling libbfd's elf32.c 586 and elf64.c at -O2. 587 Drop to -O1 for now when building for sh5. 588 kcah 589 590 591 hack gcc 3.3.2 on sh5 - fatal warning compiling function.c 592 cdate Sun Dec 7 19:44:05 GMT 2003 593 who scw 594 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 595 descr 596 Gcc3 for sh5 issues a warning: 597 .../gnu/dist/gcc/gcc/function.c:4742: warning: `and' of 598 mutually exclusive equal-tests is always 0. 599 This causes the build to fail because of -Werror. 600 Work-around by defining NOGCCERROR when building for sh5. 601 kcah 602 603 hack gcc 3.3.3 on sh5 - ICE compiling rbtdb.c and rbtdb64.c 604 cdate Thu Nov 11 00:35:33 UTC 2004 605 who he 606 file usr.sbin/bind/libdns/Makefile/1.2 607 descr 608 Gcc3 for sh5 gets an ICE compiling these files at -O2. 609 Drop to -O1 for now when building for sh5. 610 kcah 611 612 hack gcc 3.3.3 nb3 on sh5 - ICE compiling bsd-comp.c 613 cdate Thu May 25 23:05:20 UTC 2005 614 who he 615 file sys/lkm/net/bsdcomp/Makefile : 1.3 616 descr 617 Gcc3 for sh5 gets an ICE compiling this at -O2, 618 "could not split insn". Drop to -O1 for sh5. 619 kcah 620 621 hack gcc 3.3.3 nb3 on sh5 - ICE compiling strtod.c 622 cdate Tue Jan 31 10:51:52 GMT 2006 623 who scw 624 file lib/libc/gdtoa/Makefile.inc : 1.2 625 descr 626 Gcc3 for sh5 gets an ICE compiling this at -O2, 627 "could not split insn". Drop to -O1 for sh5. 628 kcah 629 630 port sun2 631 632 hack gcc 3.3.2/mdsetimage 633 cdate Tue Oct 28 18:43:05 EST 2003 634 who fredette 635 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 636 descr 637 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 638 this hack uses -O0 to avoid the problem. 639 kcah 640 641 hack gcc 3.3.2/installboot/ffs.c 642 cdate Tue Oct 28 18:43:05 EST 2003 643 who fredette 644 file usr.sbin/installboot/Makefile : 1.26 645 descr 646 ffs.c causes cc1 to barf for as-yet unknown reasons. this 647 hack uses -O0 to avoid the problem. 648 kcah 649 650 651 port m68000 652 653 hack gcc 3.3.2/gcc/ra-colorize.c 654 cdate Wed Nov 5 11:03:13 EST 2003 655 who mrg 656 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 657 descr 658 ra-colorize.c causes a whole spew of unreferenced .L* local 659 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 660 Note this has been fixed in 3.3.3 at least on m68k, 661 but it hasn't been confirmed on sun2/m68000. 662 (it's too slow even on emulator and unlikely to build 663 toolchains on sun2 with its maximum 4MB RAM) 664 kcah 665 666 port sparc64 667 668 hack disable optimzations for uvm_bio.c on 32 bit kernels 669 cdate Sun Mar 21 14:14:04 MET 2004 670 who martin 671 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 672 file sys/arch/sparc64/conf/files.sparc64 : 1.93 673 descr 674 The sparc compiler miscompiles uvm_bio.c when using 675 any optimization. This results in ubc_release panics. 676 kcah 677 678 port macppc 679 680 hack remove inline from rotate_{left,right} 681 cdate Tue Feb 22 13:43:25 EST 2005 682 who christos 683 file src/dist/bind/lib/dns/rbt.c 684 descr 685 The macppc gcc-3.3 compiler miscompiles rbt.c when these 686 functions are inlined. The error is: 687 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 688 .* named[368]: exiting (due to assertion failure) 689 This is reportedly fixed in gcc-3.4 690 kcah 691 692 port hppa 693 694 hack hppa-gcc-3.3.3/grep/dfa.c 695 cdate Sun Aug 8 08:34:32 PDT 2004 696 who chs 697 file gnu/usr.bin/grep/grep/Makefile : 1.4 698 descr 699 gcc 3.3.3 generates bad code for dfa.c with -O2, 700 reduce optimization to -O1 to avoid the bug. 701 kcah 702 703 hack hppa-gcc-3.3.3 / make/buf.c 704 cdate Mon May 8 13:02:36 CEST 2006 705 who he 706 file usr.bin/make/Makefile : 1.34 707 descr 708 gcc 3.3.3 nb3 gets an "unrecognized insn" internal 709 compiler error when building this file with -O2, 710 reduce optimization to -O1 to avoid the bug. 711 kcah 712 713 hack hppa boot-from-disk memory corruption 714 cdate Wed May 18 06:56:07 PDT 2005 715 who chs 716 file src/sys/dev/scsipi/scsipiconf.h : 1.98 717 descr 718 There is some bug with DMA on hppa that corrupts scsipi_xfer 719 structures, but it only shows up when booting from disk. 720 For now, we'll add some padding to scsipi_xfer so that 721 the corrupted memory is not otherwise used. 722 kcah 723 724 port mips 725 726 hack mips-shared-linker-load-address 727 cdate Fri Oct 7 08:33:10 UTC 2005 728 who simonb 729 file src/sys/kern/exec_elf32.c : 1.107 730 descr 731 With COMPAT_16 or previous enabled (which enables 732 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 733 load and run at address 0. The check to fix this in 734 rev 1.107 only checks the first psection of the ELF 735 executable, which may not be loadable. A more correct 736 fix is to check the first loadable psection instead of 737 just the first psection. 738 kcah 739 740
Indexes created Sat Nov 14 00:26:57 UTC 2026