HACKS revision 1.79
1 # $NetBSD: HACKS,v 1.79 2006/06/24 05:21:11 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/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/crypto/cast128/cast128.c : 1.9 162 file sys/ddb/db_command.c : 1.86 163 file sys/dev/cardbus/cardbus_map.c : 1.21 164 file sys/dev/fss.c : 1.25 165 file sys/dev/ic/igsfb.c : 1.39 166 file sys/dev/ic/mb86950.c : 1.5 167 file sys/dev/ic/midway.c : 1.71 168 file sys/dev/kttcp.c : 1.18 169 file sys/dev/rasops/rasops_bitops.h : 1.9 170 file sys/dev/pci/cmpci.c : 1.31 171 file sys/dev/pci/machfb.c : 1.45 172 file sys/dev/usb/ohci.c : 1.174 173 file sys/dev/usb/uhci.c : 1.196 174 file sys/dev/rasops/rasops_bitops.h : 1.9 175 file sys/dist/ipf/netinet/ip_nat.c : 1.10 176 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 177 file sys/dist/pf/net/pf.c : 1.22 178 file sys/fs/udf/udf_vnops.c : 1.4 179 file sys/kern/kern_sig.c : 1.219 180 file sys/kern/tty.c : 1.181 181 file sys/net/bpf.c : 1.116 182 file sys/net/zlib.c : 1.26 183 file sys/netccitt/if_x25subr.c : 1.37 184 file sys/netinet/in.c : 1.107 185 file sys/netsmb/smb_smb.c : 1.27 186 file sys/netsmb/smb_trantcp.c : 1.22 187 file sys/nfs/nfs_serv.c : 1.108 188 file sys/nfs/nfs_socket.c : 1.129 189 file sys/nfs/nfs_syscalls.c : 1.91 190 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 191 file usr.bin/ftp/ftp.c : 1.140 192 file usr.bin/find/function.c : 1.54 193 file usr.bin/mail/tty.c : 1.20 194 file usr.bin/nl/nl.c : 1.7 195 file usr.bin/systat/keyboard.c : 1.23 196 file usr.bin/usbhidctl/usbhid.c : 1.29 197 file usr.bin/vi/cl/cl_read.c : 1.5 198 file usr.bin/vi/ex/ex_cscope.c : 1.12 199 file usr.bin/vi/ex/ex_tag.c : 1.19 200 file usr.bin/vi/vi/v_txt.c : 1.15 201 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 202 file usr.sbin/cron/do_command.c : 1.19 203 file usr.sbin/timed/timed/slave.c : 1.15 204 descr 205 GCC 4.1 gets many uninitialised variable warnings wrong. We should 206 really audit all the old hacks like this when older compilers are 207 removed from the tree, as many are probably no longer required. 208 The problem is that it does not recognize initialization via function 209 call pointer. I.e. 210 int p; 211 foo(&p); 212 does not mark p as initialized. 213 kcah 214 215 hack gcc4 pointer sign and strict aliasing problems 216 mdate 10 May 2006 217 who mrg 218 file bin/ed/Makefile : 1.33 219 file bin/systrace/Makefile : 1.12 220 file distrib/utils/sysinst/Makefile.inc : 1.44 221 file games/bcd/Makefile : 1.5 222 file games/dab/Makefile : 1.5 223 file games/larn/Makefile : 1.17 224 file games/pom/Makefile : 1.5 225 file lib/libasn1/Makefile : 1.26 226 file lib/libcrypt/Makefile : 1.17 227 file lib/libgssapi/Makefile : 1.16 228 file lib/libhdb/Makefile : 1.20 229 file lib/libkadm5clnt/Makefile : 1.21 230 file lib/libkadm5srv/Makefile : 1.25 231 file lib/libkrb5/Makefile : 1.35 232 file lib/libssh/Makefile : 1.6 233 file lib/libtelnet/Makefile : 1.26 234 file libexec/getty/Makefile : 1.14 235 file libexec/kadmind/Makefile : 1.19 236 file libexec/kpasswdd/Makefile : 1.14 237 file sbin/atactl/Makefile : 1.3 238 file sbin/cgdconfig/Makefile : 1.7 239 file sbin/clri/Makefile : 1.13 240 file sbin/dkctl/Makefile : 1.4 241 file sbin/dump/Makefile : 1.33 242 file sbin/fdisk/Makefile : 1.35 243 file sbin/fsck_ext2fs/Makefile : 1.11 244 file sbin/fsck_ffs/Makefile : 1.29 245 file sbin/fsdb/Makefile : 1.18 246 file sbin/mount_smbfs/Makefile : 1.4 247 file sbin/newfs/Makefile : 1.30 248 file sbin/newfs_sysvbfs/Makefile : 1.2 249 file sbin/restore/Makefile : 1.23 250 file sbin/veriexecctl/Makefile : 1.11 251 file sys/lib/libsa/Makefile : 1.59 252 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 253 file usr.bin/awk/Makefile : 1.9 254 file usr.bin/crontab/Makefile : 1.24 255 file usr.bin/ctags/Makefile : 1.8 256 file usr.bin/gzip/Makefile : 1.10 257 file usr.bin/ssh/sftp/Makefile : 1.10 258 file usr.bin/ssh/ssh/Makefile : 1.25 259 file usr.bin/vi/build/Makefile : 1.26 260 file usr.bin/telnet/Makefile : 1.40 261 file usr.bin/tn3270/tn3270/Makefile : 1.36 262 file usr.bin/tr/Makefile : 1.4 263 file usr.sbin/amd/amd/Makefile : 1.27 264 file usr.sbin/amd/amq/Makefile : 1.14 265 file usr.sbin/amd/libamu/Makefile : 1.20 266 file usr.sbin/amd/pawd/Makefile : 1.5 267 file usr.sbin/bind/Makefile.inc : 1.22 268 file usr.sbin/bind/libdns/Makefile : 1.3 269 file usr.sbin/bind/named/Makefile : 1.17 270 file usr.sbin/bootp/bootptest/Makefile : 1.2 271 file usr.sbin/chrtbl/Makefile : 1.6 272 file usr.sbin/cron/Makefile : 1.12 273 file usr.sbin/dhcp/Makefile.inc : 1.20 274 file usr.sbin/dumplfs/Makefile : 1.11 275 file usr.sbin/hprop/Makefile : 1.13 276 file usr.sbin/installboot/Makefile : 1.35 277 file usr.sbin/ipf/ipftest/Makefile : 1.32 278 file usr.sbin/isdn/isdnd/Makefile : 1.6 279 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 280 file usr.sbin/isdn/isdntel/Makefile : 1.2 281 file usr.sbin/isdn/isdntrace/Makefile : 126 282 file usr.sbin/mopd/common/Makefile : 1.10 283 file usr.sbin/mopd/mopd/Makefile : 1.9 284 file usr.sbin/mopd/mopprobe/Makefile : 1.7 285 file usr.sbin/makefs/Makefile : 1.17 286 file usr.sbin/mscdlabel/Makefile : 1.5 287 file usr.sbin/pkg_install/add/Makefile : 1.7 288 file usr.sbin/pkg_install/create/Makefile : 1.5 289 file usr.sbin/pkg_install/lib/Makefile : 1.28 290 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 291 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 292 file usr.sbin/pppd/Makefile.inc : 1.3 293 file usr.sbin/pppd/pppd/Makefile : 1.38 294 file usr.sbin/rarpd/Makefile : 1.10 295 file usr.sbin/rbootd/Makefile : 1.10 296 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 297 file usr.sbin/rtadvd/Makefile : 1.9 298 file usr.sbin/tcpdump/Makefile : 1.42 299 file usr.sbin/wiconfig/Makefile : 1.3 300 descr 301 GCC 4.1 warns on pointer sign comparision/assignments and lots of 302 code does not conform. For now we use -Wno-pointer-sign and 303 -fno-strict-aliasing. 304 kcah 305 306 port vax 307 308 hack gcc 2.95/vax doesn't like abort being used as function pointer 309 cdate Tue Dec 13 05:54:50 GMT 2005 310 who jmc 311 file lib/libc/rpc/svc_vc.c 1.15 312 descr 313 Provide a local definition for abort which doesn't include 314 the noreturn attribute which trips up gcc 2.95 on vax. 315 316 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 317 cdate Mon May 9 12:16:22 CDT 2005 318 who jmc 319 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 320 gnu/usr.bin/gettext/libgrep/Makefile 1.3 321 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 322 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 323 descr 324 The latest gettext assumes a C99 environment or at least 325 configure checks to work around this. As we don't use configure 326 provide a stdbool.h for vax builds locally in directories from 327 the template provided by the gettext code. 328 329 hack gcc 2.95/vax can't handle __used__ 330 cdate Fri May 6 14:30:53 CDT 2005 331 who jmc 332 file src/lib/libc/gmon/mcount.c 1.17 333 src/usr.bin/config/main.c 1.11 334 descr 335 Recent changes to mark this as __used__ to prevent optimization 336 away on sparc64 don't work on 2.95 vax. Ifdef'd back in the 337 old __unused__ if on vax. 338 339 hack gcc 2.95/vax cannot handle __builtin_ffs() 340 cdate Fri Aug 23 21:31:15 CEST 2002 341 who ragge 342 file sys/lib/libkern/libkern.h : 1.42 343 descr 344 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 345 added this feature to GCC 3 so it can be removed when switching. 346 347 348 hack gcc-vax-libbz2 349 mdate 27 Jun 2002 350 who thorpej 351 file lib/libbz2/Makefile 352 descr 353 libbz2 is mis-compiled with optimization with GCC 2.95.3 354 on VAX. -O0 works around this problem. 355 kcah 356 357 hack gawk 358 mdate 8 Nov 2003 359 who ragge 360 file gnu/usr.bin/gawk/Makefile 361 descr 362 gawk is mis-compiled with optimization with GCC 2.95.3 363 on VAX. -O0 works around this problem. 364 kcah 365 366 hack vax Toolchain bug 367 cdate 28 Mar 2003 368 who he 369 file sys/arch/vax/vax/intvec.S : 1.5 370 descr 371 Workaround for PR toolchain/20924. The assembler apparently 372 tries to range-check byte offsets when it doesn't have 373 sufficient information to make that decision. 374 Workaround uses `brw' instead of `brb' instruction. 375 kcah 376 377 hack vax gcc 2.95.3 -Wuninitialized workarounds 378 cdate 6 Nov 2003 379 who he 380 file sys/dev/bi/if_ni.c : 1.22 381 file sys/arch/vax/vax/ctu.c : 1.20 382 descr 383 Workaround for gcc 2.95.3 failing to detect that certain 384 variables will be initialized; so that this code compiles 385 with -Wuninitialized. Should be reviewed and possibly 386 reverted when gcc 3.3.2 is ready for vax. 387 kcah 388 389 hack vax gcc 2.95.3 structure initialization 390 cdat 13 May 2004 391 who cl 392 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 393 descr 394 Workaround for gcc 2.95.3 failing to initialize structures 395 and/or unions inside structures using nested designators. 396 Should be reverted when gcc >=3.3.3 is ready for vax. 397 kcah 398 399 hack vax gcc 2.95.3 needs -I. to build nslexer.c 400 cdat 6 Jun 2004 401 who mhitch 402 file lib/libc/arch/vax/Makefile.inc : 1.6 403 descr 404 It appears necessary to add -I. to CPPFLAGS when building 405 nslesxer.c. This may be caused by gcc 2.95.3 being used. 406 Should be reverted when a newer gcc is ready for vax. 407 kcah 408 409 hack vax gcc 2.95.3 doesn't understand "-std=c99" 410 cdat 5 April 2005 411 who tron 412 file src/share/mk/bsd.sys.mk 413 descr 414 We cannot use "-std=c99" for compiler warning level 4 and above 415 because gcc 2.95.3 doesn't support that option. 416 kcah 417 418 hack declare boolean_t in two IPF user-mode programs 419 cdate Tue Mar 7 19:19:20 CET 2006 420 who he 421 file dist/ipf/ipsend/iptests.c : 1.8 422 dist/ipf/ipsend/sock.c : 1.7 423 descr 424 The IPF user-mode programs ipsend and iptest first 425 include <sys/types.h> without _KERNEL defined, and 426 later include <sys/file.h> with _KERNEL defined. 427 This causes a build failure when building for vax, 428 since <sys/device.h> ends up being included without 429 bollean_t being defined by <sys/types.h>. 430 Build failure and further details documented in 431 PR#32907. 432 kcah 433 434 port sparc64 435 436 hack binutil-2.11-sparc64-pltrela 437 mdate 14 Aug 2001 438 who eeh 439 file libexec/ld.elf_so/arch/sparc64/mdreloc.c 440 descr 441 The first four PLT entries are reserved. There is some 442 disagreement whether they should have associated relocation 443 entries. Both the SPARC 32-bit and 64-bit ELF specifications 444 say that they should have relocation entries, but the 32-bit 445 SPARC binutils do not generate them, and now the 64-bit SPARC 446 binutils have stopped generating them too. 447 448 To provide binary compatibility, we will check the first entry, 449 if it is reserved it should not be of the type JMP_SLOT. If it 450 is JMP_SLOT, then the 4 reserved entries were not generated and 451 our index is 4 entries too far, so we frob the rela pointer. 452 kcah 453 454 455 port arm 456 457 hack gcc-unsigned-compare 458 cdate 09 Mar 2002 459 mdate 18 Mar 2002 460 who bjh21 461 file dist/bind/lib/nameser/ns_parse.c : 1.3 462 file dist/dhcp/minires/ns_parse.c : 1.3 463 file dist/dhcp/omapip/result.c : 1.2 464 file dist/dhcp/server/failover.c : 1.3 465 file gnu/dist/gawk/eval.c : 1.4 466 file gnu/dist/toolchain/bfd/bfd.c : 1.2 467 file gnu/dist/toolchain/bfd/format.c : 1.2 468 file gnu/dist/toolchain/gdb/target.c : 1.2 469 file sys/kern/vfs_subr.c : 1.172 470 descr When checking that a potentially-unsigned enum is >= 0, assign 471 it to an int first. This is necessary to avoid "comparison is 472 always true" warnings with -fshort-enums. Casting to an int 473 really should be enough, but turns out not to be. 474 kcah 475 476 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 477 cdate Tue Oct 28 18:02:16 GMT 2003 478 who skrll 479 pr 23044 480 file sys/arch/arm/conf/Makefile.arm : 1.19 481 descr 482 Performing a build.sh tools on a CATS with NFS mounted 483 obj and src directories results in "panic: receive 1" 484 The hack is to compile sys/kern/uipc_socket.c with 485 -fno-strict-aliasing 486 kcah 487 488 489 port pc532 490 491 hack egcs-pc532-ip6_mroute 492 cdate 09 Jul 2002 493 who simonb 494 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 495 file sys/arch/pc532/conf/files.pc532 : 1.47 496 descr 497 egcs 1.1.2 gets an "internal error--insn does not satisfy its 498 constraints" error compiling ip6_mroute.c with -O2 or greater. 499 -O1 works around this problem. 500 kcah 501 502 hack gcc-pc532-duffs_device 503 cdate Mon Oct 27 07:23:05 UTC 2003 504 who simonb 505 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 506 file sys/arch/pc532/conf/files.pc532 : 1.52 507 pr GCC PR optimization/5230 508 descr 509 gcc incorrectly gives an "unreachable code at beginning of 510 switch statement" for a Duff's device construct in 511 arch/pc532/dev/ncr.c. There is no way to disable just this 512 warning, so -Wno-error is turned on for this file. 513 kcah 514 515 hack gcc332-cppmacro-ice 516 cdate Sun Dec 7 12:48:33 UTC 2003 517 who simonb 518 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 519 descr 520 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 521 The hack is to use -O1 for this file. Fixed in gcc 522 -current mainline, unable to work out where the fix is 523 right now. 524 kcah 525 526 527 port sh3 528 529 hack gcc4-sh3-bz2 530 mdate 20 May 2006 531 who mrg 532 file lib/libbz2/Makefile : 1.10 533 descr 534 The in-tree GCC 4.1-based compiler generated too-far 535 pc-relative addresses. Hack is to build with -O0. 536 kcah 537 538 539 port sh5 540 541 hack SuperH SH5 Toolchain Bugs 542 cdate 11 Jul 2002 543 who scw 544 file usr.sbin/ndbootd/ndbootd.c : 1.6 545 file usr.sbin/traceroute/traceroute.c : 1.48 546 descr 547 The SuperH SH5 toolchain (2.97-sh5-010522) gets an internal 548 compiler error when assigning a bit-wise inverted value 549 under some circumstances. 550 Work around it by splitting the statement into two. 551 kcah 552 553 hack SuperH SH5 Toolchain Bugs 554 cdate 17 May 2003 555 who scw 556 file lib/libpthread/pthread_lock.c : 1.7 557 descr 558 The SuperH SH5 toolchain generates incorrect PIC code when 559 faced with a symbol which is declared extern, but has local 560 scope due to being defined within an asm() statement (without 561 being declared .globl in that statement). Work around it by 562 adding the .globl. 563 kcah 564 565 hack gcc 3.3.2 on sh5 - ICE compiling reload1.c at -O2 566 cdate Sun Dec 7 19:44:05 GMT 2003 567 who scw 568 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 569 descr 570 Gcc3 for sh5 gets an ICE compiling reload1.c at -O2. 571 Drop to -O1 for now when building for sh5. 572 kcah 573 574 hack gcc 3.3.2 on sh5 - ICE compiling elf32.c/elf64.c at -O2 575 cdate Sun Dec 7 21:10:46 GMT 2003 576 who scw 577 file gnu/lib/libbfd/Makefile : 1.39 578 descr 579 Gcc3 for sh5 gets an ICE compiling libbfd's elf32.c 580 and elf64.c at -O2. 581 Drop to -O1 for now when building for sh5. 582 kcah 583 584 585 hack gcc 3.3.2 on sh5 - fatal warning compiling function.c 586 cdate Sun Dec 7 19:44:05 GMT 2003 587 who scw 588 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 589 descr 590 Gcc3 for sh5 issues a warning: 591 .../gnu/dist/gcc/gcc/function.c:4742: warning: `and' of 592 mutually exclusive equal-tests is always 0. 593 This causes the build to fail because of -Werror. 594 Work-around by defining NOGCCERROR when building for sh5. 595 kcah 596 597 hack gcc 3.3.3 on sh5 - ICE compiling rbtdb.c and rbtdb64.c 598 cdate Thu Nov 11 00:35:33 UTC 2004 599 who he 600 file usr.sbin/bind/libdns/Makefile/1.2 601 descr 602 Gcc3 for sh5 gets an ICE compiling these files at -O2. 603 Drop to -O1 for now when building for sh5. 604 kcah 605 606 hack gcc 3.3.3 nb3 on sh5 - ICE compiling bsd-comp.c 607 cdate Thu May 25 23:05:20 UTC 2005 608 who he 609 file sys/lkm/net/bsdcomp/Makefile : 1.3 610 descr 611 Gcc3 for sh5 gets an ICE compiling this at -O2, 612 "could not split insn". Drop to -O1 for sh5. 613 kcah 614 615 hack gcc 3.3.3 nb3 on sh5 - ICE compiling strtod.c 616 cdate Tue Jan 31 10:51:52 GMT 2006 617 who scw 618 file lib/libc/gdtoa/Makefile.inc : 1.2 619 descr 620 Gcc3 for sh5 gets an ICE compiling this at -O2, 621 "could not split insn". Drop to -O1 for sh5. 622 kcah 623 624 port sun2 625 626 hack gcc 3.3.2/mdsetimage 627 cdate Tue Oct 28 18:43:05 EST 2003 628 who fredette 629 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 630 descr 631 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 632 this hack uses -O0 to avoid the problem. 633 kcah 634 635 hack gcc 3.3.2/installboot/ffs.c 636 cdate Tue Oct 28 18:43:05 EST 2003 637 who fredette 638 file usr.sbin/installboot/Makefile : 1.26 639 descr 640 ffs.c causes cc1 to barf for as-yet unknown reasons. this 641 hack uses -O0 to avoid the problem. 642 kcah 643 644 hack gcc 4.1.1/fsck_ffs/pass1.c 645 cdate Fri Jun 23 10:30:25 PDT 2006 646 who mrg 647 file sbin/fsck_ffs/Makefile : 1.30 648 file sbin/fsdb/Makefile : 1.19 649 file sbin/dump_lfs/Makefile : 1.9 650 file usr.sbin/ndbootd/Makefile : 1.2 651 descr 652 pass1.c causes cc1 to barf for as-yet unknown reasons. this 653 hack uses -O0 to avoid the problem. (these all seem to be the 654 same problem.) 655 kcah 656 657 658 port m68000 659 660 hack gcc 3.3.2/gcc/ra-colorize.c 661 cdate Wed Nov 5 11:03:13 EST 2003 662 who mrg 663 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 664 descr 665 ra-colorize.c causes a whole spew of unreferenced .L* local 666 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 667 Note this has been fixed in 3.3.3 at least on m68k, 668 but it hasn't been confirmed on sun2/m68000. 669 (it's too slow even on emulator and unlikely to build 670 toolchains on sun2 with its maximum 4MB RAM) 671 kcah 672 673 port sparc64 674 675 hack disable optimzations for uvm_bio.c on 32 bit kernels 676 cdate Sun Mar 21 14:14:04 MET 2004 677 who martin 678 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 679 file sys/arch/sparc64/conf/files.sparc64 : 1.93 680 descr 681 The sparc compiler miscompiles uvm_bio.c when using 682 any optimization. This results in ubc_release panics. 683 kcah 684 685 port macppc 686 687 hack remove inline from rotate_{left,right} 688 cdate Tue Feb 22 13:43:25 EST 2005 689 who christos 690 file src/dist/bind/lib/dns/rbt.c 691 descr 692 The macppc gcc-3.3 compiler miscompiles rbt.c when these 693 functions are inlined. The error is: 694 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 695 .* named[368]: exiting (due to assertion failure) 696 This is reportedly fixed in gcc-3.4 697 kcah 698 699 port hppa 700 701 hack hppa-gcc-3.3.3/grep/dfa.c 702 cdate Sun Aug 8 08:34:32 PDT 2004 703 who chs 704 file gnu/usr.bin/grep/grep/Makefile : 1.4 705 descr 706 gcc 3.3.3 generates bad code for dfa.c with -O2, 707 reduce optimization to -O1 to avoid the bug. 708 kcah 709 710 hack hppa boot-from-disk memory corruption 711 cdate Wed May 18 06:56:07 PDT 2005 712 who chs 713 file src/sys/dev/scsipi/scsipiconf.h : 1.98 714 descr 715 There is some bug with DMA on hppa that corrupts scsipi_xfer 716 structures, but it only shows up when booting from disk. 717 For now, we'll add some padding to scsipi_xfer so that 718 the corrupted memory is not otherwise used. 719 kcah 720 721 port mips 722 723 hack mips-shared-linker-load-address 724 cdate Fri Oct 7 08:33:10 UTC 2005 725 who simonb 726 file src/sys/kern/exec_elf32.c : 1.107 727 descr 728 With COMPAT_16 or previous enabled (which enables 729 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 730 load and run at address 0. The check to fix this in 731 rev 1.107 only checks the first psection of the ELF 732 executable, which may not be loadable. A more correct 733 fix is to check the first loadable psection instead of 734 just the first psection. 735 kcah 736 737
Indexes created Wed Nov 05 19:10:08 GMT 2025