HACKS revision 1.91.2.4
1# $NetBSD: HACKS,v 1.91.2.4 2012/03/17 19:40:41 bouyer 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 distrib/utils/x_dhclient/Makefile : 1.15 223file games/bcd/Makefile : 1.5 224file games/dab/Makefile : 1.5 225file games/larn/Makefile : 1.17 226file games/pom/Makefile : 1.5 227file lib/libasn1/Makefile : 1.26 228file lib/libcrypt/Makefile : 1.17 229file lib/libgssapi/Makefile : 1.16 230file lib/libhdb/Makefile : 1.20 231file lib/libkadm5clnt/Makefile : 1.21 232file lib/libkadm5srv/Makefile : 1.25 233file lib/libkrb5/Makefile : 1.35 234file lib/libssh/Makefile : 1.6 235file lib/libtelnet/Makefile : 1.26 236file libexec/getty/Makefile : 1.14 237file libexec/kadmind/Makefile : 1.19 238file libexec/kpasswdd/Makefile : 1.14 239file sbin/atactl/Makefile : 1.3 240file sbin/cgdconfig/Makefile : 1.7 241file sbin/clri/Makefile : 1.13 242file sbin/dkctl/Makefile : 1.4 243file sbin/dump/Makefile : 1.33 244file sbin/fdisk/Makefile : 1.35 245file sbin/fsck_ext2fs/Makefile : 1.11 246file sbin/fsck_ffs/Makefile : 1.29 247file sbin/fsdb/Makefile : 1.18 248file sbin/mount_smbfs/Makefile : 1.4 249file sbin/newfs/Makefile : 1.30 250file sbin/newfs_sysvbfs/Makefile : 1.2 251file sbin/restore/Makefile : 1.23 252file sbin/veriexecctl/Makefile : 1.11 253file sys/lib/libsa/Makefile : 1.59 254file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 255file usr.bin/awk/Makefile : 1.9 256file usr.bin/crontab/Makefile : 1.24 257file usr.bin/ctags/Makefile : 1.8 258file usr.bin/gzip/Makefile : 1.10 259file usr.bin/ssh/sftp/Makefile : 1.10 260file usr.bin/ssh/ssh/Makefile : 1.25 261file usr.bin/vi/build/Makefile : 1.26 262file usr.bin/telnet/Makefile : 1.40 263file usr.bin/tn3270/tn3270/Makefile : 1.36 264file usr.bin/tr/Makefile : 1.4 265file usr.sbin/amd/amd/Makefile : 1.27 266file usr.sbin/amd/amq/Makefile : 1.14 267file usr.sbin/amd/libamu/Makefile : 1.20 268file usr.sbin/amd/pawd/Makefile : 1.5 269file usr.sbin/bind/Makefile.inc : 1.22 270file usr.sbin/bind/libdns/Makefile : 1.3 271file usr.sbin/bind/named/Makefile : 1.17 272file usr.sbin/bootp/bootptest/Makefile : 1.2 273file usr.sbin/chrtbl/Makefile : 1.6 274file usr.sbin/cron/Makefile : 1.12 275file usr.sbin/dhcp/Makefile.inc : 1.20 276file usr.sbin/dumplfs/Makefile : 1.11 277file usr.sbin/hprop/Makefile : 1.13 278file usr.sbin/installboot/Makefile : 1.35 279file usr.sbin/ipf/ipftest/Makefile : 1.32 280file usr.sbin/isdn/isdnd/Makefile : 1.6 281file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 282file usr.sbin/isdn/isdntel/Makefile : 1.2 283file usr.sbin/isdn/isdntrace/Makefile : 126 284file usr.sbin/mopd/common/Makefile : 1.10 285file usr.sbin/mopd/mopd/Makefile : 1.9 286file usr.sbin/mopd/mopprobe/Makefile : 1.7 287file usr.sbin/makefs/Makefile : 1.17 288file usr.sbin/mscdlabel/Makefile : 1.5 289file usr.sbin/pkg_install/add/Makefile : 1.7 290file usr.sbin/pkg_install/create/Makefile : 1.5 291file usr.sbin/pkg_install/lib/Makefile : 1.28 292file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 293file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 294file usr.sbin/pppd/Makefile.inc : 1.3 295file usr.sbin/pppd/pppd/Makefile : 1.38 296file usr.sbin/rarpd/Makefile : 1.10 297file usr.sbin/rbootd/Makefile : 1.10 298file usr.sbin/rpc.pcnfsd/Makefile : 1.17 299file usr.sbin/rtadvd/Makefile : 1.9 300file usr.sbin/tcpdump/Makefile : 1.42 301file usr.sbin/wiconfig/Makefile : 1.3 302descr 303 GCC 4.1 warns on pointer sign comparision/assignments and lots of 304 code does not conform. For now we use -Wno-pointer-sign and 305 -fno-strict-aliasing. 306kcah 307 308hack rbus resource allocation work around 309cdate 10 May 2007 310who jnemeth 311file src/sys/dev/pcmcia/aic_pcmcia.c : 1.35 312pr 26909 31245 313descr 314 On some cards, the card align field property value interferes 315 with the rbus resource allocation causing the card not to 316 configure properly. Setting it to 0 fixes the problem but it 317 is not the proper solution. 318kcah 319 320port vax 321 322 hack gcc4/vax compiler crash 323 cdate Thu Sep 25 22:20:08 CEST 2008 324 who bouyer 325 file x11/Xserver/os/Makefile : 1.14.4.1 326 file x11/bin/lbxproxy/Makefile : 1.6.12.1 327 descr 328 GCC4 on vax crashes. -O0 stops it happening so far... 329 kcah 330 331 hack gcc4/vax compiler crash 332 cdate Fri Jun 30 22:39:12 PDT 2006 333 who mrg 334 file bin/csh/Makefile : 1.27 335 file lib/i18n_module/UTF7/Makefile : 1.2 336 descr 337 GCC4 on vax crashes. -O0 stops it happening so far... 338 kcah 339 340 hack gcc 2.95/vax doesn't like abort being used as function pointer 341 cdate Tue Dec 13 05:54:50 GMT 2005 342 who jmc 343 file lib/libc/rpc/svc_vc.c 1.15 344 descr 345 Provide a local definition for abort which doesn't include 346 the noreturn attribute which trips up gcc 2.95 on vax. 347 kcah 348 349 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 350 cdate Mon May 9 12:16:22 CDT 2005 351 who jmc 352 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 353 gnu/usr.bin/gettext/libgrep/Makefile 1.3 354 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 355 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 356 descr 357 The latest gettext assumes a C99 environment or at least 358 configure checks to work around this. As we don't use configure 359 provide a stdbool.h for vax builds locally in directories from 360 the template provided by the gettext code. 361 kcah 362 363 hack gcc 2.95/vax cannot handle __builtin_ffs() 364 cdate Fri Aug 23 21:31:15 CEST 2002 365 who ragge 366 file sys/lib/libkern/libkern.h : 1.42 367 descr 368 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 369 added this feature to GCC 3 so it can be removed when switching. 370 kcah 371 372 hack gcc-vax-libbz2 373 mdate 27 Jun 2002 374 who thorpej 375 file lib/libbz2/Makefile 376 descr 377 libbz2 is mis-compiled with optimization with GCC 2.95.3 378 on VAX. -O0 works around this problem. 379 kcah 380 381 hack vax Toolchain bug 382 cdate 28 Mar 2003 383 who he 384 file sys/arch/vax/vax/intvec.S : 1.5 385 descr 386 Workaround for PR toolchain/20924. The assembler apparently 387 tries to range-check byte offsets when it doesn't have 388 sufficient information to make that decision. 389 Workaround uses `brw' instead of `brb' instruction. 390 kcah 391 392 hack vax gcc 2.95.3 -Wuninitialized workarounds 393 cdate 6 Nov 2003 394 who he 395 file sys/dev/bi/if_ni.c : 1.22 396 file sys/arch/vax/vax/ctu.c : 1.20 397 descr 398 Workaround for gcc 2.95.3 failing to detect that certain 399 variables will be initialized; so that this code compiles 400 with -Wuninitialized. Should be reviewed and possibly 401 reverted when gcc 3.3.2 is ready for vax. 402 kcah 403 404 hack vax gcc 2.95.3 structure initialization 405 cdat 13 May 2004 406 who cl 407 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 408 descr 409 Workaround for gcc 2.95.3 failing to initialize structures 410 and/or unions inside structures using nested designators. 411 Should be reverted when gcc >=3.3.3 is ready for vax. 412 kcah 413 414 hack vax gcc 2.95.3 needs -I. to build nslexer.c 415 cdat 6 Jun 2004 416 who mhitch 417 file lib/libc/arch/vax/Makefile.inc : 1.6 418 descr 419 It appears necessary to add -I. to CPPFLAGS when building 420 nslesxer.c. This may be caused by gcc 2.95.3 being used. 421 Should be reverted when a newer gcc is ready for vax. 422 kcah 423 424 hack vax gcc 2.95.3 doesn't understand "-std=c99" 425 cdat 5 April 2005 426 who tron 427 file src/share/mk/bsd.sys.mk 428 descr 429 We cannot use "-std=c99" for compiler warning level 4 and above 430 because gcc 2.95.3 doesn't support that option. 431 kcah 432 433 hack declare boolean_t in two IPF user-mode programs 434 cdate Tue Mar 7 19:19:20 CET 2006 435 who he 436 file dist/ipf/ipsend/iptests.c : 1.8 437 dist/ipf/ipsend/sock.c : 1.7 438 descr 439 The IPF user-mode programs ipsend and iptest first 440 include <sys/types.h> without _KERNEL defined, and 441 later include <sys/file.h> with _KERNEL defined. 442 This causes a build failure when building for vax, 443 since <sys/device.h> ends up being included without 444 bollean_t being defined by <sys/types.h>. 445 Build failure and further details documented in 446 PR#32907. 447 kcah 448 449port arm 450 451 hack gcc-unsigned-compare 452 cdate 09 Mar 2002 453 mdate 18 Mar 2002 454 who bjh21 455 file dist/bind/lib/nameser/ns_parse.c : 1.3 456 file dist/dhcp/minires/ns_parse.c : 1.3 457 file dist/dhcp/omapip/result.c : 1.2 458 file dist/dhcp/server/failover.c : 1.3 459 file gnu/dist/toolchain/bfd/bfd.c : 1.2 460 file gnu/dist/toolchain/bfd/format.c : 1.2 461 file gnu/dist/toolchain/gdb/target.c : 1.2 462 file sys/kern/vfs_subr.c : 1.172 463 descr When checking that a potentially-unsigned enum is >= 0, assign 464 it to an int first. This is necessary to avoid "comparison is 465 always true" warnings with -fshort-enums. Casting to an int 466 really should be enough, but turns out not to be. 467 kcah 468 469 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 470 cdate Tue Oct 28 18:02:16 GMT 2003 471 who skrll 472 pr 23044 473 file sys/arch/arm/conf/Makefile.arm : 1.19 474 descr 475 Performing a build.sh tools on a CATS with NFS mounted 476 obj and src directories results in "panic: receive 1" 477 The hack is to compile sys/kern/uipc_socket.c with 478 -fno-strict-aliasing 479 kcah 480 481 482port pc532 483 484 hack egcs-pc532-ip6_mroute 485 cdate 09 Jul 2002 486 who simonb 487 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 488 file sys/arch/pc532/conf/files.pc532 : 1.47 489 descr 490 egcs 1.1.2 gets an "internal error--insn does not satisfy its 491 constraints" error compiling ip6_mroute.c with -O2 or greater. 492 -O1 works around this problem. 493 kcah 494 495 hack gcc-pc532-duffs_device 496 cdate Mon Oct 27 07:23:05 UTC 2003 497 who simonb 498 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 499 file sys/arch/pc532/conf/files.pc532 : 1.52 500 pr GCC PR optimization/5230 501 descr 502 gcc incorrectly gives an "unreachable code at beginning of 503 switch statement" for a Duff's device construct in 504 arch/pc532/dev/ncr.c. There is no way to disable just this 505 warning, so -Wno-error is turned on for this file. 506 kcah 507 508 hack gcc332-cppmacro-ice 509 cdate Sun Dec 7 12:48:33 UTC 2003 510 who simonb 511 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 512 descr 513 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 514 The hack is to use -O1 for this file. Fixed in gcc 515 -current mainline, unable to work out where the fix is 516 right now. 517 kcah 518 519 520port sh3 521 522 hack gcc4-sh3-bz2 523 mdate 20 May 2006 524 who mrg 525 file lib/libbz2/Makefile : 1.10 526 descr 527 The in-tree GCC 4.1-based compiler generated too-far 528 pc-relative addresses. Hack is to build with -O0. 529 kcah 530 531 532port sun2 533 534 hack gcc 3.3.2/mdsetimage 535 cdate Tue Oct 28 18:43:05 EST 2003 536 who fredette 537 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 538 descr 539 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 540 this hack uses -O0 to avoid the problem. 541 kcah 542 543 hack gcc 3.3.2/installboot/ffs.c 544 cdate Tue Oct 28 18:43:05 EST 2003 545 who fredette 546 file usr.sbin/installboot/Makefile : 1.26 547 descr 548 ffs.c causes cc1 to barf for as-yet unknown reasons. this 549 hack uses -O0 to avoid the problem. 550 kcah 551 552 hack gcc 4.1.1/fsck_ffs/pass1.c 553 cdate Fri Jun 23 10:30:25 PDT 2006 554 who mrg 555 file sbin/fsck_ffs/Makefile : 1.30 556 file sbin/fsdb/Makefile : 1.19 557 file sbin/dump_lfs/Makefile : 1.9 558 file usr.sbin/ndbootd/Makefile : 1.2 559 descr 560 pass1.c causes cc1 to barf for as-yet unknown reasons. this 561 hack uses -O0 to avoid the problem. (these all seem to be the 562 same problem.) 563 kcah 564 565 566port m68000 567 568 hack gcc 3.3.2/gcc/ra-colorize.c 569 cdate Wed Nov 5 11:03:13 EST 2003 570 who mrg 571 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 572 descr 573 ra-colorize.c causes a whole spew of unreferenced .L* local 574 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 575 Note this has been fixed in 3.3.3 at least on m68k, 576 but it hasn't been confirmed on sun2/m68000. 577 (it's too slow even on emulator and unlikely to build 578 toolchains on sun2 with its maximum 4MB RAM) 579 kcah 580 581port macppc 582 583 hack remove inline from rotate_{left,right} 584 cdate Tue Feb 22 13:43:25 EST 2005 585 who christos 586 file src/dist/bind/lib/dns/rbt.c 587 descr 588 The macppc gcc-3.3 compiler miscompiles rbt.c when these 589 functions are inlined. The error is: 590 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 591 .* named[368]: exiting (due to assertion failure) 592 This is reportedly fixed in gcc-3.4 593 kcah 594 595port mips 596 597 hack mips-shared-linker-load-address 598 cdate Fri Oct 7 08:33:10 UTC 2005 599 who simonb 600 file src/sys/kern/exec_elf32.c : 1.107 601 descr 602 With COMPAT_16 or previous enabled (which enables 603 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 604 load and run at address 0. The check to fix this in 605 rev 1.107 only checks the first psection of the ELF 606 executable, which may not be loadable. A more correct 607 fix is to check the first loadable psection instead of 608 just the first psection. 609 kcah 610 611 hack mips-duplicate-ras-end-label 612 cdate Sat Sep 2 23:29:42 2006 613 who martin 614 file src/regres/sys/kern/ras/ras3/Makefile : 1.3 615 descr 616 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 617 labels by duplicated __asm output from RAS_END() 618 macro. 619 kcah 620 621port i386 622 623 hack minus-Os-broken-machdep-c 624 cdate Mon Jul 31 13:09:01 EDT 2006 625 who christos 626 file src/sys/arch/machdep.c : 1.576 627 descr 628 gcc-4 miscompiles this file with -Os and the resulting 629 kernel resets as reported in PR33725 630 kcah 631 632 hack use volatile intermediate variable to enforce rounding 633 cdate Tue Aug 1 22:15:55 MEST 2006 634 who drochner 635 file src/lib/libm/src/lrintf.c : 1.4 636 file src/lib/libm/src/s_rintf.c : 1.8 637 descr 638 gcc-4 does subsequent operations on "float" values within 639 the i387 FPU without rounding the intermediate results 640 kcah 641