HACKS revision 1.85
1 # $NetBSD: HACKS,v 1.85 2006/09/02 21:32:13 martin 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 uninitialized 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/powerpc/ppc_reloc.c : 1.40 152 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 153 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 154 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 155 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 156 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 157 file sbin/fsck_ext2fs/dir.c : 1.19 158 file sbin/routed/rtquery/rtquery.c : 1.18 159 file sys/arch/amd64/amd64/pmap.c : 1.26 160 file sys/arch/i386/pci/piixpcib.c : 1.4 161 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 162 file sys/crypto/cast128/cast128.c : 1.9 163 file sys/ddb/db_command.c : 1.86 164 file sys/dev/cardbus/cardbus_map.c : 1.21 165 file sys/dev/fss.c : 1.25 166 file sys/dev/ic/igsfb.c : 1.39 167 file sys/dev/ic/mb86950.c : 1.5 168 file sys/dev/ic/midway.c : 1.71 169 file sys/dev/kttcp.c : 1.18 170 file sys/dev/rasops/rasops_bitops.h : 1.9 171 file sys/dev/pci/cmpci.c : 1.31 172 file sys/dev/pci/machfb.c : 1.45 173 file sys/dev/usb/ohci.c : 1.174 174 file sys/dev/usb/uhci.c : 1.196 175 file sys/dev/rasops/rasops_bitops.h : 1.9 176 file sys/dist/ipf/netinet/ip_nat.c : 1.10 177 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 178 file sys/dist/pf/net/pf.c : 1.22 179 file sys/fs/udf/udf_vnops.c : 1.4 180 file sys/kern/kern_sig.c : 1.219 181 file sys/kern/tty.c : 1.181 182 file sys/net/bpf.c : 1.116 183 file sys/net/zlib.c : 1.26 184 file sys/netccitt/if_x25subr.c : 1.37 185 file sys/netinet/in.c : 1.107 186 file sys/netsmb/smb_smb.c : 1.27 187 file sys/netsmb/smb_trantcp.c : 1.22 188 file sys/nfs/nfs_serv.c : 1.108 189 file sys/nfs/nfs_socket.c : 1.129 190 file sys/nfs/nfs_syscalls.c : 1.91 191 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 192 file usr.bin/ftp/ftp.c : 1.140 193 file usr.bin/find/function.c : 1.54 194 file usr.bin/mail/tty.c : 1.20 195 file usr.bin/nl/nl.c : 1.7 196 file usr.bin/systat/keyboard.c : 1.23 197 file usr.bin/usbhidctl/usbhid.c : 1.29 198 file usr.bin/vi/cl/cl_read.c : 1.5 199 file usr.bin/vi/ex/ex_cscope.c : 1.12 200 file usr.bin/vi/ex/ex_tag.c : 1.19 201 file usr.bin/vi/vi/v_txt.c : 1.15 202 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 203 file usr.sbin/cron/do_command.c : 1.19 204 file usr.sbin/timed/timed/slave.c : 1.15 205 descr 206 GCC 4.1 gets many uninitialised variable warnings wrong. We should 207 really audit all the old hacks like this when older compilers are 208 removed from the tree, as many are probably no longer required. 209 The problem is that it does not recognize initialization via function 210 call pointer. I.e. 211 int p; 212 foo(&p); 213 does not mark p as initialized. 214 kcah 215 216 hack gcc4 pointer sign and strict aliasing problems 217 mdate 10 May 2006 218 who mrg 219 file bin/ed/Makefile : 1.33 220 file bin/systrace/Makefile : 1.12 221 file distrib/utils/sysinst/Makefile.inc : 1.44 222 file games/bcd/Makefile : 1.5 223 file games/dab/Makefile : 1.5 224 file games/larn/Makefile : 1.17 225 file games/pom/Makefile : 1.5 226 file lib/libasn1/Makefile : 1.26 227 file lib/libcrypt/Makefile : 1.17 228 file lib/libgssapi/Makefile : 1.16 229 file lib/libhdb/Makefile : 1.20 230 file lib/libkadm5clnt/Makefile : 1.21 231 file lib/libkadm5srv/Makefile : 1.25 232 file lib/libkrb5/Makefile : 1.35 233 file lib/libssh/Makefile : 1.6 234 file lib/libtelnet/Makefile : 1.26 235 file libexec/getty/Makefile : 1.14 236 file libexec/kadmind/Makefile : 1.19 237 file libexec/kpasswdd/Makefile : 1.14 238 file sbin/atactl/Makefile : 1.3 239 file sbin/cgdconfig/Makefile : 1.7 240 file sbin/clri/Makefile : 1.13 241 file sbin/dkctl/Makefile : 1.4 242 file sbin/dump/Makefile : 1.33 243 file sbin/fdisk/Makefile : 1.35 244 file sbin/fsck_ext2fs/Makefile : 1.11 245 file sbin/fsck_ffs/Makefile : 1.29 246 file sbin/fsdb/Makefile : 1.18 247 file sbin/mount_smbfs/Makefile : 1.4 248 file sbin/newfs/Makefile : 1.30 249 file sbin/newfs_sysvbfs/Makefile : 1.2 250 file sbin/restore/Makefile : 1.23 251 file sbin/veriexecctl/Makefile : 1.11 252 file sys/lib/libsa/Makefile : 1.59 253 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 254 file usr.bin/awk/Makefile : 1.9 255 file usr.bin/crontab/Makefile : 1.24 256 file usr.bin/ctags/Makefile : 1.8 257 file usr.bin/gzip/Makefile : 1.10 258 file usr.bin/ssh/sftp/Makefile : 1.10 259 file usr.bin/ssh/ssh/Makefile : 1.25 260 file usr.bin/vi/build/Makefile : 1.26 261 file usr.bin/telnet/Makefile : 1.40 262 file usr.bin/tn3270/tn3270/Makefile : 1.36 263 file usr.bin/tr/Makefile : 1.4 264 file usr.sbin/amd/amd/Makefile : 1.27 265 file usr.sbin/amd/amq/Makefile : 1.14 266 file usr.sbin/amd/libamu/Makefile : 1.20 267 file usr.sbin/amd/pawd/Makefile : 1.5 268 file usr.sbin/bind/Makefile.inc : 1.22 269 file usr.sbin/bind/libdns/Makefile : 1.3 270 file usr.sbin/bind/named/Makefile : 1.17 271 file usr.sbin/bootp/bootptest/Makefile : 1.2 272 file usr.sbin/chrtbl/Makefile : 1.6 273 file usr.sbin/cron/Makefile : 1.12 274 file usr.sbin/dhcp/Makefile.inc : 1.20 275 file usr.sbin/dumplfs/Makefile : 1.11 276 file usr.sbin/hprop/Makefile : 1.13 277 file usr.sbin/installboot/Makefile : 1.35 278 file usr.sbin/ipf/ipftest/Makefile : 1.32 279 file usr.sbin/isdn/isdnd/Makefile : 1.6 280 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 281 file usr.sbin/isdn/isdntel/Makefile : 1.2 282 file usr.sbin/isdn/isdntrace/Makefile : 126 283 file usr.sbin/mopd/common/Makefile : 1.10 284 file usr.sbin/mopd/mopd/Makefile : 1.9 285 file usr.sbin/mopd/mopprobe/Makefile : 1.7 286 file usr.sbin/makefs/Makefile : 1.17 287 file usr.sbin/mscdlabel/Makefile : 1.5 288 file usr.sbin/pkg_install/add/Makefile : 1.7 289 file usr.sbin/pkg_install/create/Makefile : 1.5 290 file usr.sbin/pkg_install/lib/Makefile : 1.28 291 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 292 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 293 file usr.sbin/pppd/Makefile.inc : 1.3 294 file usr.sbin/pppd/pppd/Makefile : 1.38 295 file usr.sbin/rarpd/Makefile : 1.10 296 file usr.sbin/rbootd/Makefile : 1.10 297 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 298 file usr.sbin/rtadvd/Makefile : 1.9 299 file usr.sbin/tcpdump/Makefile : 1.42 300 file usr.sbin/wiconfig/Makefile : 1.3 301 descr 302 GCC 4.1 warns on pointer sign comparision/assignments and lots of 303 code does not conform. For now we use -Wno-pointer-sign and 304 -fno-strict-aliasing. 305 kcah 306 307 port vax 308 309 hack gcc4/vax compiler crash 310 cdate Fri Jun 30 22:39:12 PDT 2006 311 who mrg 312 file bin/csh/Makefile : 1.27 313 file lib/i18n_module/UTF7/Makefile : 1.2 314 descr 315 GCC4 on vax crashes. -O0 stops it happening so far... 316 kcah 317 318 hack gcc 2.95/vax doesn't like abort being used as function pointer 319 cdate Tue Dec 13 05:54:50 GMT 2005 320 who jmc 321 file lib/libc/rpc/svc_vc.c 1.15 322 descr 323 Provide a local definition for abort which doesn't include 324 the noreturn attribute which trips up gcc 2.95 on vax. 325 kcah 326 327 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 328 cdate Mon May 9 12:16:22 CDT 2005 329 who jmc 330 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 331 gnu/usr.bin/gettext/libgrep/Makefile 1.3 332 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 333 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 334 descr 335 The latest gettext assumes a C99 environment or at least 336 configure checks to work around this. As we don't use configure 337 provide a stdbool.h for vax builds locally in directories from 338 the template provided by the gettext code. 339 kcah 340 341 hack gcc 2.95/vax can't handle __used__ 342 cdate Fri May 6 14:30:53 CDT 2005 343 who jmc 344 file src/lib/libc/gmon/mcount.c 1.17 345 src/usr.bin/config/main.c 1.11 346 descr 347 Recent changes to mark this as __used__ to prevent optimization 348 away on sparc64 don't work on 2.95 vax. Ifdef'd back in the 349 old __unused__ if on vax. 350 kcah 351 352 hack gcc 2.95/vax cannot handle __builtin_ffs() 353 cdate Fri Aug 23 21:31:15 CEST 2002 354 who ragge 355 file sys/lib/libkern/libkern.h : 1.42 356 descr 357 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 358 added this feature to GCC 3 so it can be removed when switching. 359 kcah 360 361 hack gcc-vax-libbz2 362 mdate 27 Jun 2002 363 who thorpej 364 file lib/libbz2/Makefile 365 descr 366 libbz2 is mis-compiled with optimization with GCC 2.95.3 367 on VAX. -O0 works around this problem. 368 kcah 369 370 hack gawk 371 mdate 8 Nov 2003 372 who ragge 373 file gnu/usr.bin/gawk/Makefile 374 descr 375 gawk is mis-compiled with optimization with GCC 2.95.3 376 on VAX. -O0 works around this problem. 377 kcah 378 379 hack vax Toolchain bug 380 cdate 28 Mar 2003 381 who he 382 file sys/arch/vax/vax/intvec.S : 1.5 383 descr 384 Workaround for PR toolchain/20924. The assembler apparently 385 tries to range-check byte offsets when it doesn't have 386 sufficient information to make that decision. 387 Workaround uses `brw' instead of `brb' instruction. 388 kcah 389 390 hack vax gcc 2.95.3 -Wuninitialized workarounds 391 cdate 6 Nov 2003 392 who he 393 file sys/dev/bi/if_ni.c : 1.22 394 file sys/arch/vax/vax/ctu.c : 1.20 395 descr 396 Workaround for gcc 2.95.3 failing to detect that certain 397 variables will be initialized; so that this code compiles 398 with -Wuninitialized. Should be reviewed and possibly 399 reverted when gcc 3.3.2 is ready for vax. 400 kcah 401 402 hack vax gcc 2.95.3 structure initialization 403 cdat 13 May 2004 404 who cl 405 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 406 descr 407 Workaround for gcc 2.95.3 failing to initialize structures 408 and/or unions inside structures using nested designators. 409 Should be reverted when gcc >=3.3.3 is ready for vax. 410 kcah 411 412 hack vax gcc 2.95.3 needs -I. to build nslexer.c 413 cdat 6 Jun 2004 414 who mhitch 415 file lib/libc/arch/vax/Makefile.inc : 1.6 416 descr 417 It appears necessary to add -I. to CPPFLAGS when building 418 nslesxer.c. This may be caused by gcc 2.95.3 being used. 419 Should be reverted when a newer gcc is ready for vax. 420 kcah 421 422 hack vax gcc 2.95.3 doesn't understand "-std=c99" 423 cdat 5 April 2005 424 who tron 425 file src/share/mk/bsd.sys.mk 426 descr 427 We cannot use "-std=c99" for compiler warning level 4 and above 428 because gcc 2.95.3 doesn't support that option. 429 kcah 430 431 hack declare boolean_t in two IPF user-mode programs 432 cdate Tue Mar 7 19:19:20 CET 2006 433 who he 434 file dist/ipf/ipsend/iptests.c : 1.8 435 dist/ipf/ipsend/sock.c : 1.7 436 descr 437 The IPF user-mode programs ipsend and iptest first 438 include <sys/types.h> without _KERNEL defined, and 439 later include <sys/file.h> with _KERNEL defined. 440 This causes a build failure when building for vax, 441 since <sys/device.h> ends up being included without 442 bollean_t being defined by <sys/types.h>. 443 Build failure and further details documented in 444 PR#32907. 445 kcah 446 447 port sparc64 448 449 hack binutil-2.11-sparc64-pltrela 450 mdate 14 Aug 2001 451 who eeh 452 file libexec/ld.elf_so/arch/sparc64/mdreloc.c 453 descr 454 The first four PLT entries are reserved. There is some 455 disagreement whether they should have associated relocation 456 entries. Both the SPARC 32-bit and 64-bit ELF specifications 457 say that they should have relocation entries, but the 32-bit 458 SPARC binutils do not generate them, and now the 64-bit SPARC 459 binutils have stopped generating them too. 460 461 To provide binary compatibility, we will check the first entry, 462 if it is reserved it should not be of the type JMP_SLOT. If it 463 is JMP_SLOT, then the 4 reserved entries were not generated and 464 our index is 4 entries too far, so we frob the rela pointer. 465 kcah 466 467 468 port arm 469 470 hack gcc-unsigned-compare 471 cdate 09 Mar 2002 472 mdate 18 Mar 2002 473 who bjh21 474 file dist/bind/lib/nameser/ns_parse.c : 1.3 475 file dist/dhcp/minires/ns_parse.c : 1.3 476 file dist/dhcp/omapip/result.c : 1.2 477 file dist/dhcp/server/failover.c : 1.3 478 file gnu/dist/gawk/eval.c : 1.4 479 file gnu/dist/toolchain/bfd/bfd.c : 1.2 480 file gnu/dist/toolchain/bfd/format.c : 1.2 481 file gnu/dist/toolchain/gdb/target.c : 1.2 482 file sys/kern/vfs_subr.c : 1.172 483 descr When checking that a potentially-unsigned enum is >= 0, assign 484 it to an int first. This is necessary to avoid "comparison is 485 always true" warnings with -fshort-enums. Casting to an int 486 really should be enough, but turns out not to be. 487 kcah 488 489 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 490 cdate Tue Oct 28 18:02:16 GMT 2003 491 who skrll 492 pr 23044 493 file sys/arch/arm/conf/Makefile.arm : 1.19 494 descr 495 Performing a build.sh tools on a CATS with NFS mounted 496 obj and src directories results in "panic: receive 1" 497 The hack is to compile sys/kern/uipc_socket.c with 498 -fno-strict-aliasing 499 kcah 500 501 502 port pc532 503 504 hack egcs-pc532-ip6_mroute 505 cdate 09 Jul 2002 506 who simonb 507 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 508 file sys/arch/pc532/conf/files.pc532 : 1.47 509 descr 510 egcs 1.1.2 gets an "internal error--insn does not satisfy its 511 constraints" error compiling ip6_mroute.c with -O2 or greater. 512 -O1 works around this problem. 513 kcah 514 515 hack gcc-pc532-duffs_device 516 cdate Mon Oct 27 07:23:05 UTC 2003 517 who simonb 518 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 519 file sys/arch/pc532/conf/files.pc532 : 1.52 520 pr GCC PR optimization/5230 521 descr 522 gcc incorrectly gives an "unreachable code at beginning of 523 switch statement" for a Duff's device construct in 524 arch/pc532/dev/ncr.c. There is no way to disable just this 525 warning, so -Wno-error is turned on for this file. 526 kcah 527 528 hack gcc332-cppmacro-ice 529 cdate Sun Dec 7 12:48:33 UTC 2003 530 who simonb 531 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 532 descr 533 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 534 The hack is to use -O1 for this file. Fixed in gcc 535 -current mainline, unable to work out where the fix is 536 right now. 537 kcah 538 539 540 port sh3 541 542 hack gcc4-sh3-bz2 543 mdate 20 May 2006 544 who mrg 545 file lib/libbz2/Makefile : 1.10 546 descr 547 The in-tree GCC 4.1-based compiler generated too-far 548 pc-relative addresses. Hack is to build with -O0. 549 kcah 550 551 552 port sh5 553 554 hack SuperH SH5 Toolchain Bugs 555 cdate 11 Jul 2002 556 who scw 557 file usr.sbin/ndbootd/ndbootd.c : 1.6 558 file usr.sbin/traceroute/traceroute.c : 1.48 559 descr 560 The SuperH SH5 toolchain (2.97-sh5-010522) gets an internal 561 compiler error when assigning a bit-wise inverted value 562 under some circumstances. 563 Work around it by splitting the statement into two. 564 kcah 565 566 hack SuperH SH5 Toolchain Bugs 567 cdate 17 May 2003 568 who scw 569 file lib/libpthread/pthread_lock.c : 1.7 570 descr 571 The SuperH SH5 toolchain generates incorrect PIC code when 572 faced with a symbol which is declared extern, but has local 573 scope due to being defined within an asm() statement (without 574 being declared .globl in that statement). Work around it by 575 adding the .globl. 576 kcah 577 578 hack gcc 3.3.2 on sh5 - ICE compiling reload1.c at -O2 579 cdate Sun Dec 7 19:44:05 GMT 2003 580 who scw 581 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 582 descr 583 Gcc3 for sh5 gets an ICE compiling reload1.c at -O2. 584 Drop to -O1 for now when building for sh5. 585 kcah 586 587 hack gcc 3.3.2 on sh5 - ICE compiling elf32.c/elf64.c at -O2 588 cdate Sun Dec 7 21:10:46 GMT 2003 589 who scw 590 file gnu/lib/libbfd/Makefile : 1.39 591 descr 592 Gcc3 for sh5 gets an ICE compiling libbfd's elf32.c 593 and elf64.c at -O2. 594 Drop to -O1 for now when building for sh5. 595 kcah 596 597 598 hack gcc 3.3.2 on sh5 - fatal warning compiling function.c 599 cdate Sun Dec 7 19:44:05 GMT 2003 600 who scw 601 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 602 descr 603 Gcc3 for sh5 issues a warning: 604 .../gnu/dist/gcc/gcc/function.c:4742: warning: `and' of 605 mutually exclusive equal-tests is always 0. 606 This causes the build to fail because of -Werror. 607 Work-around by defining NOGCCERROR when building for sh5. 608 kcah 609 610 hack gcc 3.3.3 on sh5 - ICE compiling rbtdb.c and rbtdb64.c 611 cdate Thu Nov 11 00:35:33 UTC 2004 612 who he 613 file usr.sbin/bind/libdns/Makefile/1.2 614 descr 615 Gcc3 for sh5 gets an ICE compiling these files at -O2. 616 Drop to -O1 for now when building for sh5. 617 kcah 618 619 hack gcc 3.3.3 nb3 on sh5 - ICE compiling bsd-comp.c 620 cdate Thu May 25 23:05:20 UTC 2005 621 who he 622 file sys/lkm/net/bsdcomp/Makefile : 1.3 623 descr 624 Gcc3 for sh5 gets an ICE compiling this at -O2, 625 "could not split insn". Drop to -O1 for sh5. 626 kcah 627 628 hack gcc 3.3.3 nb3 on sh5 - ICE compiling strtod.c 629 cdate Tue Jan 31 10:51:52 GMT 2006 630 who scw 631 file lib/libc/gdtoa/Makefile.inc : 1.2 632 descr 633 Gcc3 for sh5 gets an ICE compiling this at -O2, 634 "could not split insn". Drop to -O1 for sh5. 635 kcah 636 637 port sun2 638 639 hack gcc 3.3.2/mdsetimage 640 cdate Tue Oct 28 18:43:05 EST 2003 641 who fredette 642 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 643 descr 644 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 645 this hack uses -O0 to avoid the problem. 646 kcah 647 648 hack gcc 3.3.2/installboot/ffs.c 649 cdate Tue Oct 28 18:43:05 EST 2003 650 who fredette 651 file usr.sbin/installboot/Makefile : 1.26 652 descr 653 ffs.c causes cc1 to barf for as-yet unknown reasons. this 654 hack uses -O0 to avoid the problem. 655 kcah 656 657 hack gcc 4.1.1/fsck_ffs/pass1.c 658 cdate Fri Jun 23 10:30:25 PDT 2006 659 who mrg 660 file sbin/fsck_ffs/Makefile : 1.30 661 file sbin/fsdb/Makefile : 1.19 662 file sbin/dump_lfs/Makefile : 1.9 663 file usr.sbin/ndbootd/Makefile : 1.2 664 descr 665 pass1.c causes cc1 to barf for as-yet unknown reasons. this 666 hack uses -O0 to avoid the problem. (these all seem to be the 667 same problem.) 668 kcah 669 670 671 port m68000 672 673 hack gcc 3.3.2/gcc/ra-colorize.c 674 cdate Wed Nov 5 11:03:13 EST 2003 675 who mrg 676 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 677 descr 678 ra-colorize.c causes a whole spew of unreferenced .L* local 679 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 680 Note this has been fixed in 3.3.3 at least on m68k, 681 but it hasn't been confirmed on sun2/m68000. 682 (it's too slow even on emulator and unlikely to build 683 toolchains on sun2 with its maximum 4MB RAM) 684 kcah 685 686 port sparc64 687 688 hack disable optimzations for uvm_bio.c on 32 bit kernels 689 cdate Sun Mar 21 14:14:04 MET 2004 690 who martin 691 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 692 file sys/arch/sparc64/conf/files.sparc64 : 1.93 693 descr 694 The sparc compiler miscompiles uvm_bio.c when using 695 any optimization. This results in ubc_release panics. 696 kcah 697 698 port macppc 699 700 hack remove inline from rotate_{left,right} 701 cdate Tue Feb 22 13:43:25 EST 2005 702 who christos 703 file src/dist/bind/lib/dns/rbt.c 704 descr 705 The macppc gcc-3.3 compiler miscompiles rbt.c when these 706 functions are inlined. The error is: 707 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 708 .* named[368]: exiting (due to assertion failure) 709 This is reportedly fixed in gcc-3.4 710 kcah 711 712 port hppa 713 714 hack hppa-gcc-3.3.3/grep/dfa.c 715 cdate Sun Aug 8 08:34:32 PDT 2004 716 who chs 717 file gnu/usr.bin/grep/grep/Makefile : 1.4 718 descr 719 gcc 3.3.3 generates bad code for dfa.c with -O2, 720 reduce optimization to -O1 to avoid the bug. 721 kcah 722 723 hack hppa boot-from-disk memory corruption 724 cdate Wed May 18 06:56:07 PDT 2005 725 who chs 726 file src/sys/dev/scsipi/scsipiconf.h : 1.98 727 descr 728 There is some bug with DMA on hppa that corrupts scsipi_xfer 729 structures, but it only shows up when booting from disk. 730 For now, we'll add some padding to scsipi_xfer so that 731 the corrupted memory is not otherwise used. 732 kcah 733 734 port mips 735 736 hack mips-shared-linker-load-address 737 cdate Fri Oct 7 08:33:10 UTC 2005 738 who simonb 739 file src/sys/kern/exec_elf32.c : 1.107 740 descr 741 With COMPAT_16 or previous enabled (which enables 742 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 743 load and run at address 0. The check to fix this in 744 rev 1.107 only checks the first psection of the ELF 745 executable, which may not be loadable. A more correct 746 fix is to check the first loadable psection instead of 747 just the first psection. 748 kcah 749 750 hack mips-duplicate-ras-end-label 751 cdate Sat Sep 2 23:29:42 2006 752 who martin 753 file src/regres/sys/kern/ras/ras3/Makefile : 1.3 754 descr 755 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 756 labels by duplicated __asm output from RAS_END() 757 macro. 758 kcah 759 760 port i386 761 762 hack minus-Os-broken-machdep-c 763 cdate Mon Jul 31 13:09:01 EDT 2006 764 who christos 765 file src/sys/arch/machdep.c : 1.576 766 descr 767 gcc-4 miscompiles this file with -Os and the resulting 768 kernel resets as reported in PR33725 769 kcah 770 771 hack use volatile intermediate variable to enforce rounding 772 cdate Tue Aug 1 22:15:55 MEST 2006 773 who drochner 774 file src/lib/libm/src/lrintf.c : 1.4 775 file src/lib/libm/src/s_rintf.c : 1.8 776 descr 777 gcc-4 does subsequent operations on "float" values within 778 the i387 FPU without rounding the intermediate results 779 kcah 780
Indexes created Wed Nov 05 21:10:10 GMT 2025