HACKS revision 1.83
1# $NetBSD: HACKS,v 1.83 2006/07/31 18:39:32 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 30hack netstat ieee1394 address printing. 31mdate 14 Nov 2000 32who matt 33file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 34descr 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. 38kcah 39 40hack xterm vs. libterm 41mdate 01 Aug 2000 42who jdc 43file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 44pr 10383 45descr 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. 51kcah 52 53hack wi-at-big-endian-bus 54cdate 15 Mar 2002 55who martin 56file dev/ic/wireg.h 57descr 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. 61kcah 62 63hack specific knowledge of colours in curses code 64cdate Sun Apr 6 11:05:24 BST 2003 65who jdc 66file lib/libcurses/color.c : r1.24 67descr 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 72kcah 73 74hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 75cdate 21 Aug 2003 76who he 77file sys/miscfs/procfs/procfs_linux.c : 1.14 78descr 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. 85kcah 86 87hack GCC2 isn't C99 88cdate 5 December 2003 89who mrg 90file gnu/dist/binutils/ld/ldlex.c: r1.2 91descr 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. 97kcah 98 99hack gcc-strict-aliasing 100cdate 6 August 2004 101who junyoung 102pr 26516 103file src/usr.sbin/racoon/racoon/Makefile : 1.21 104descr 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. 111kcah 112 113hack gcc 3.3.3 wrong uninitialised variable 114mdate 12 May 2006 115who he 116file usr.bin/msgc/msg_sys.def : 1.33-1.34 117file distrib/utils/sysinst/aout2elf.c : 1.11 118descr 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. 123kcah 124 125hack gcc4 wrong uninitialized variable 126mdate 10 May 2006 127who mrg 128file bin/ksh/eval.c : 1.6 129file bin/sh/histedit.c : 1.39 130file bin/sh/parser.c : 1.60 131file bin/systrace/systrace.c : 1.33 132file crypto/dist/heimdal/kdc/524.c : 1.10 133file crypto/dist/ssh/sftp.c : 1.20 134file crypto/dist/ssh/ssh-keysign.c : 1.11 135file dist/ipf/lib/hostname.c : 1.2 136file dist/ipf/tools/ipmon.c : 1.8 137file dist/ntp/ntpd/ntp_request.c : 1.4 138file dist/ntp/ntpd/refclock_shm.c : 1.4 139file dist/ntp/sntp/timing.c : 1.3 140file dist/pppd/pppstats/pppstats.c : 1.3 141file dist/smbfs/lib/smb/rap.c : 1.6 142file dist/tcpdump/print-zephyr.c : 1.5 143file distrib/utils/sysinst/aout2elf.c : 1.12 144file gnu/libexec/uucp/uucico/uucico.c : 1.6 145file lib/libc/citrus/citrus_csmapper.c : 1.6 146file lib/libc/citrus/citrus_pivot_factory.c : 1.5 147file lib/libc/inet/inet_cidr_ntop.c : 1.3 148file lib/libc/inet/inet_ntop.c : 1.3 149file lib/libc/stdio/vfwprintf.c : 1.8 150file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 151file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 152file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 153file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 154file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 155file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 156file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 157file sbin/fsck_ext2fs/dir.c : 1.19 158file sbin/routed/rtquery/rtquery.c : 1.18 159file sys/arch/amd64/amd64/pmap.c : 1.26 160file sys/arch/i386/pci/piixpcib.c : 1.4 161file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 162file sys/crypto/cast128/cast128.c : 1.9 163file sys/ddb/db_command.c : 1.86 164file sys/dev/cardbus/cardbus_map.c : 1.21 165file sys/dev/fss.c : 1.25 166file sys/dev/ic/igsfb.c : 1.39 167file sys/dev/ic/mb86950.c : 1.5 168file sys/dev/ic/midway.c : 1.71 169file sys/dev/kttcp.c : 1.18 170file sys/dev/rasops/rasops_bitops.h : 1.9 171file sys/dev/pci/cmpci.c : 1.31 172file sys/dev/pci/machfb.c : 1.45 173file sys/dev/usb/ohci.c : 1.174 174file sys/dev/usb/uhci.c : 1.196 175file sys/dev/rasops/rasops_bitops.h : 1.9 176file sys/dist/ipf/netinet/ip_nat.c : 1.10 177file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 178file sys/dist/pf/net/pf.c : 1.22 179file sys/fs/udf/udf_vnops.c : 1.4 180file sys/kern/kern_sig.c : 1.219 181file sys/kern/tty.c : 1.181 182file sys/net/bpf.c : 1.116 183file sys/net/zlib.c : 1.26 184file sys/netccitt/if_x25subr.c : 1.37 185file sys/netinet/in.c : 1.107 186file sys/netsmb/smb_smb.c : 1.27 187file sys/netsmb/smb_trantcp.c : 1.22 188file sys/nfs/nfs_serv.c : 1.108 189file sys/nfs/nfs_socket.c : 1.129 190file sys/nfs/nfs_syscalls.c : 1.91 191file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 192file usr.bin/ftp/ftp.c : 1.140 193file usr.bin/find/function.c : 1.54 194file usr.bin/mail/tty.c : 1.20 195file usr.bin/nl/nl.c : 1.7 196file usr.bin/systat/keyboard.c : 1.23 197file usr.bin/usbhidctl/usbhid.c : 1.29 198file usr.bin/vi/cl/cl_read.c : 1.5 199file usr.bin/vi/ex/ex_cscope.c : 1.12 200file usr.bin/vi/ex/ex_tag.c : 1.19 201file usr.bin/vi/vi/v_txt.c : 1.15 202file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 203file usr.sbin/cron/do_command.c : 1.19 204file usr.sbin/timed/timed/slave.c : 1.15 205descr 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. 214kcah 215 216hack gcc4 pointer sign and strict aliasing problems 217mdate 10 May 2006 218who mrg 219file bin/ed/Makefile : 1.33 220file bin/systrace/Makefile : 1.12 221file distrib/utils/sysinst/Makefile.inc : 1.44 222file games/bcd/Makefile : 1.5 223file games/dab/Makefile : 1.5 224file games/larn/Makefile : 1.17 225file games/pom/Makefile : 1.5 226file lib/libasn1/Makefile : 1.26 227file lib/libcrypt/Makefile : 1.17 228file lib/libgssapi/Makefile : 1.16 229file lib/libhdb/Makefile : 1.20 230file lib/libkadm5clnt/Makefile : 1.21 231file lib/libkadm5srv/Makefile : 1.25 232file lib/libkrb5/Makefile : 1.35 233file lib/libssh/Makefile : 1.6 234file lib/libtelnet/Makefile : 1.26 235file libexec/getty/Makefile : 1.14 236file libexec/kadmind/Makefile : 1.19 237file libexec/kpasswdd/Makefile : 1.14 238file sbin/atactl/Makefile : 1.3 239file sbin/cgdconfig/Makefile : 1.7 240file sbin/clri/Makefile : 1.13 241file sbin/dkctl/Makefile : 1.4 242file sbin/dump/Makefile : 1.33 243file sbin/fdisk/Makefile : 1.35 244file sbin/fsck_ext2fs/Makefile : 1.11 245file sbin/fsck_ffs/Makefile : 1.29 246file sbin/fsdb/Makefile : 1.18 247file sbin/mount_smbfs/Makefile : 1.4 248file sbin/newfs/Makefile : 1.30 249file sbin/newfs_sysvbfs/Makefile : 1.2 250file sbin/restore/Makefile : 1.23 251file sbin/veriexecctl/Makefile : 1.11 252file sys/lib/libsa/Makefile : 1.59 253file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 254file usr.bin/awk/Makefile : 1.9 255file usr.bin/crontab/Makefile : 1.24 256file usr.bin/ctags/Makefile : 1.8 257file usr.bin/gzip/Makefile : 1.10 258file usr.bin/ssh/sftp/Makefile : 1.10 259file usr.bin/ssh/ssh/Makefile : 1.25 260file usr.bin/vi/build/Makefile : 1.26 261file usr.bin/telnet/Makefile : 1.40 262file usr.bin/tn3270/tn3270/Makefile : 1.36 263file usr.bin/tr/Makefile : 1.4 264file usr.sbin/amd/amd/Makefile : 1.27 265file usr.sbin/amd/amq/Makefile : 1.14 266file usr.sbin/amd/libamu/Makefile : 1.20 267file usr.sbin/amd/pawd/Makefile : 1.5 268file usr.sbin/bind/Makefile.inc : 1.22 269file usr.sbin/bind/libdns/Makefile : 1.3 270file usr.sbin/bind/named/Makefile : 1.17 271file usr.sbin/bootp/bootptest/Makefile : 1.2 272file usr.sbin/chrtbl/Makefile : 1.6 273file usr.sbin/cron/Makefile : 1.12 274file usr.sbin/dhcp/Makefile.inc : 1.20 275file usr.sbin/dumplfs/Makefile : 1.11 276file usr.sbin/hprop/Makefile : 1.13 277file usr.sbin/installboot/Makefile : 1.35 278file usr.sbin/ipf/ipftest/Makefile : 1.32 279file usr.sbin/isdn/isdnd/Makefile : 1.6 280file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 281file usr.sbin/isdn/isdntel/Makefile : 1.2 282file usr.sbin/isdn/isdntrace/Makefile : 126 283file usr.sbin/mopd/common/Makefile : 1.10 284file usr.sbin/mopd/mopd/Makefile : 1.9 285file usr.sbin/mopd/mopprobe/Makefile : 1.7 286file usr.sbin/makefs/Makefile : 1.17 287file usr.sbin/mscdlabel/Makefile : 1.5 288file usr.sbin/pkg_install/add/Makefile : 1.7 289file usr.sbin/pkg_install/create/Makefile : 1.5 290file usr.sbin/pkg_install/lib/Makefile : 1.28 291file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 292file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 293file usr.sbin/pppd/Makefile.inc : 1.3 294file usr.sbin/pppd/pppd/Makefile : 1.38 295file usr.sbin/rarpd/Makefile : 1.10 296file usr.sbin/rbootd/Makefile : 1.10 297file usr.sbin/rpc.pcnfsd/Makefile : 1.17 298file usr.sbin/rtadvd/Makefile : 1.9 299file usr.sbin/tcpdump/Makefile : 1.42 300file usr.sbin/wiconfig/Makefile : 1.3 301descr 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. 305kcah 306 307port 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 447port 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 468port 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 502port 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 540port 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 552port 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 637port 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 671port 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 686port 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 698port 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 712port 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 734port 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 750port i386 751 752 hack minus-Os-broken-machdep-c 753 cdate Mon Jul 31 13:09:01 EDT 2006 754 who christos 755 file src/sys/arch/machdep.c : 1.576 756 descr 757 gcc-4 miscompiles this file with -Os and the resulting 758 kernel resets as reported in PR33725 759 kcah 760