HACKS revision 1.91.2.1
1# $NetBSD: HACKS,v 1.91.2.1 2007/05/16 20:24:13 jdc 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 Fri Jun 30 22:39:12 PDT 2006 324 who mrg 325 file bin/csh/Makefile : 1.27 326 file lib/i18n_module/UTF7/Makefile : 1.2 327 descr 328 GCC4 on vax crashes. -O0 stops it happening so far... 329 kcah 330 331 hack gcc 2.95/vax doesn't like abort being used as function pointer 332 cdate Tue Dec 13 05:54:50 GMT 2005 333 who jmc 334 file lib/libc/rpc/svc_vc.c 1.15 335 descr 336 Provide a local definition for abort which doesn't include 337 the noreturn attribute which trips up gcc 2.95 on vax. 338 kcah 339 340 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 341 cdate Mon May 9 12:16:22 CDT 2005 342 who jmc 343 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 344 gnu/usr.bin/gettext/libgrep/Makefile 1.3 345 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 346 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 347 descr 348 The latest gettext assumes a C99 environment or at least 349 configure checks to work around this. As we don't use configure 350 provide a stdbool.h for vax builds locally in directories from 351 the template provided by the gettext code. 352 kcah 353 354 hack gcc 2.95/vax cannot handle __builtin_ffs() 355 cdate Fri Aug 23 21:31:15 CEST 2002 356 who ragge 357 file sys/lib/libkern/libkern.h : 1.42 358 descr 359 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 360 added this feature to GCC 3 so it can be removed when switching. 361 kcah 362 363 hack gcc-vax-libbz2 364 mdate 27 Jun 2002 365 who thorpej 366 file lib/libbz2/Makefile 367 descr 368 libbz2 is mis-compiled with optimization with GCC 2.95.3 369 on VAX. -O0 works around this problem. 370 kcah 371 372 hack vax Toolchain bug 373 cdate 28 Mar 2003 374 who he 375 file sys/arch/vax/vax/intvec.S : 1.5 376 descr 377 Workaround for PR toolchain/20924. The assembler apparently 378 tries to range-check byte offsets when it doesn't have 379 sufficient information to make that decision. 380 Workaround uses `brw' instead of `brb' instruction. 381 kcah 382 383 hack vax gcc 2.95.3 -Wuninitialized workarounds 384 cdate 6 Nov 2003 385 who he 386 file sys/dev/bi/if_ni.c : 1.22 387 file sys/arch/vax/vax/ctu.c : 1.20 388 descr 389 Workaround for gcc 2.95.3 failing to detect that certain 390 variables will be initialized; so that this code compiles 391 with -Wuninitialized. Should be reviewed and possibly 392 reverted when gcc 3.3.2 is ready for vax. 393 kcah 394 395 hack vax gcc 2.95.3 structure initialization 396 cdat 13 May 2004 397 who cl 398 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 399 descr 400 Workaround for gcc 2.95.3 failing to initialize structures 401 and/or unions inside structures using nested designators. 402 Should be reverted when gcc >=3.3.3 is ready for vax. 403 kcah 404 405 hack vax gcc 2.95.3 needs -I. to build nslexer.c 406 cdat 6 Jun 2004 407 who mhitch 408 file lib/libc/arch/vax/Makefile.inc : 1.6 409 descr 410 It appears necessary to add -I. to CPPFLAGS when building 411 nslesxer.c. This may be caused by gcc 2.95.3 being used. 412 Should be reverted when a newer gcc is ready for vax. 413 kcah 414 415 hack vax gcc 2.95.3 doesn't understand "-std=c99" 416 cdat 5 April 2005 417 who tron 418 file src/share/mk/bsd.sys.mk 419 descr 420 We cannot use "-std=c99" for compiler warning level 4 and above 421 because gcc 2.95.3 doesn't support that option. 422 kcah 423 424 hack declare boolean_t in two IPF user-mode programs 425 cdate Tue Mar 7 19:19:20 CET 2006 426 who he 427 file dist/ipf/ipsend/iptests.c : 1.8 428 dist/ipf/ipsend/sock.c : 1.7 429 descr 430 The IPF user-mode programs ipsend and iptest first 431 include <sys/types.h> without _KERNEL defined, and 432 later include <sys/file.h> with _KERNEL defined. 433 This causes a build failure when building for vax, 434 since <sys/device.h> ends up being included without 435 bollean_t being defined by <sys/types.h>. 436 Build failure and further details documented in 437 PR#32907. 438 kcah 439 440port arm 441 442 hack gcc-unsigned-compare 443 cdate 09 Mar 2002 444 mdate 18 Mar 2002 445 who bjh21 446 file dist/bind/lib/nameser/ns_parse.c : 1.3 447 file dist/dhcp/minires/ns_parse.c : 1.3 448 file dist/dhcp/omapip/result.c : 1.2 449 file dist/dhcp/server/failover.c : 1.3 450 file gnu/dist/toolchain/bfd/bfd.c : 1.2 451 file gnu/dist/toolchain/bfd/format.c : 1.2 452 file gnu/dist/toolchain/gdb/target.c : 1.2 453 file sys/kern/vfs_subr.c : 1.172 454 descr When checking that a potentially-unsigned enum is >= 0, assign 455 it to an int first. This is necessary to avoid "comparison is 456 always true" warnings with -fshort-enums. Casting to an int 457 really should be enough, but turns out not to be. 458 kcah 459 460 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 461 cdate Tue Oct 28 18:02:16 GMT 2003 462 who skrll 463 pr 23044 464 file sys/arch/arm/conf/Makefile.arm : 1.19 465 descr 466 Performing a build.sh tools on a CATS with NFS mounted 467 obj and src directories results in "panic: receive 1" 468 The hack is to compile sys/kern/uipc_socket.c with 469 -fno-strict-aliasing 470 kcah 471 472 473port pc532 474 475 hack egcs-pc532-ip6_mroute 476 cdate 09 Jul 2002 477 who simonb 478 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 479 file sys/arch/pc532/conf/files.pc532 : 1.47 480 descr 481 egcs 1.1.2 gets an "internal error--insn does not satisfy its 482 constraints" error compiling ip6_mroute.c with -O2 or greater. 483 -O1 works around this problem. 484 kcah 485 486 hack gcc-pc532-duffs_device 487 cdate Mon Oct 27 07:23:05 UTC 2003 488 who simonb 489 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 490 file sys/arch/pc532/conf/files.pc532 : 1.52 491 pr GCC PR optimization/5230 492 descr 493 gcc incorrectly gives an "unreachable code at beginning of 494 switch statement" for a Duff's device construct in 495 arch/pc532/dev/ncr.c. There is no way to disable just this 496 warning, so -Wno-error is turned on for this file. 497 kcah 498 499 hack gcc332-cppmacro-ice 500 cdate Sun Dec 7 12:48:33 UTC 2003 501 who simonb 502 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 503 descr 504 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 505 The hack is to use -O1 for this file. Fixed in gcc 506 -current mainline, unable to work out where the fix is 507 right now. 508 kcah 509 510 511port sh3 512 513 hack gcc4-sh3-bz2 514 mdate 20 May 2006 515 who mrg 516 file lib/libbz2/Makefile : 1.10 517 descr 518 The in-tree GCC 4.1-based compiler generated too-far 519 pc-relative addresses. Hack is to build with -O0. 520 kcah 521 522 523port sh5 524 525 hack SuperH SH5 Toolchain Bugs 526 cdate 11 Jul 2002 527 who scw 528 file usr.sbin/ndbootd/ndbootd.c : 1.6 529 file usr.sbin/traceroute/traceroute.c : 1.48 530 descr 531 The SuperH SH5 toolchain (2.97-sh5-010522) gets an internal 532 compiler error when assigning a bit-wise inverted value 533 under some circumstances. 534 Work around it by splitting the statement into two. 535 kcah 536 537 hack SuperH SH5 Toolchain Bugs 538 cdate 17 May 2003 539 who scw 540 file lib/libpthread/pthread_lock.c : 1.7 541 descr 542 The SuperH SH5 toolchain generates incorrect PIC code when 543 faced with a symbol which is declared extern, but has local 544 scope due to being defined within an asm() statement (without 545 being declared .globl in that statement). Work around it by 546 adding the .globl. 547 kcah 548 549 hack gcc 3.3.2 on sh5 - ICE compiling reload1.c at -O2 550 cdate Sun Dec 7 19:44:05 GMT 2003 551 who scw 552 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 553 descr 554 Gcc3 for sh5 gets an ICE compiling reload1.c at -O2. 555 Drop to -O1 for now when building for sh5. 556 kcah 557 558 hack gcc 3.3.2 on sh5 - ICE compiling elf32.c/elf64.c at -O2 559 cdate Sun Dec 7 21:10:46 GMT 2003 560 who scw 561 file gnu/lib/libbfd/Makefile : 1.39 562 descr 563 Gcc3 for sh5 gets an ICE compiling libbfd's elf32.c 564 and elf64.c at -O2. 565 Drop to -O1 for now when building for sh5. 566 kcah 567 568 569 hack gcc 3.3.2 on sh5 - fatal warning compiling function.c 570 cdate Sun Dec 7 19:44:05 GMT 2003 571 who scw 572 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 573 descr 574 Gcc3 for sh5 issues a warning: 575 .../gnu/dist/gcc/gcc/function.c:4742: warning: `and' of 576 mutually exclusive equal-tests is always 0. 577 This causes the build to fail because of -Werror. 578 Work-around by defining NOGCCERROR when building for sh5. 579 kcah 580 581 hack gcc 3.3.3 on sh5 - ICE compiling rbtdb.c and rbtdb64.c 582 cdate Thu Nov 11 00:35:33 UTC 2004 583 who he 584 file usr.sbin/bind/libdns/Makefile/1.2 585 descr 586 Gcc3 for sh5 gets an ICE compiling these files at -O2. 587 Drop to -O1 for now when building for sh5. 588 kcah 589 590 hack gcc 3.3.3 nb3 on sh5 - ICE compiling bsd-comp.c 591 cdate Thu May 25 23:05:20 UTC 2005 592 who he 593 file sys/lkm/net/bsdcomp/Makefile : 1.3 594 descr 595 Gcc3 for sh5 gets an ICE compiling this at -O2, 596 "could not split insn". Drop to -O1 for sh5. 597 kcah 598 599 hack gcc 3.3.3 nb3 on sh5 - ICE compiling strtod.c 600 cdate Tue Jan 31 10:51:52 GMT 2006 601 who scw 602 file lib/libc/gdtoa/Makefile.inc : 1.2 603 descr 604 Gcc3 for sh5 gets an ICE compiling this at -O2, 605 "could not split insn". Drop to -O1 for sh5. 606 kcah 607 608port sun2 609 610 hack gcc 3.3.2/mdsetimage 611 cdate Tue Oct 28 18:43:05 EST 2003 612 who fredette 613 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 614 descr 615 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 616 this hack uses -O0 to avoid the problem. 617 kcah 618 619 hack gcc 3.3.2/installboot/ffs.c 620 cdate Tue Oct 28 18:43:05 EST 2003 621 who fredette 622 file usr.sbin/installboot/Makefile : 1.26 623 descr 624 ffs.c causes cc1 to barf for as-yet unknown reasons. this 625 hack uses -O0 to avoid the problem. 626 kcah 627 628 hack gcc 4.1.1/fsck_ffs/pass1.c 629 cdate Fri Jun 23 10:30:25 PDT 2006 630 who mrg 631 file sbin/fsck_ffs/Makefile : 1.30 632 file sbin/fsdb/Makefile : 1.19 633 file sbin/dump_lfs/Makefile : 1.9 634 file usr.sbin/ndbootd/Makefile : 1.2 635 descr 636 pass1.c causes cc1 to barf for as-yet unknown reasons. this 637 hack uses -O0 to avoid the problem. (these all seem to be the 638 same problem.) 639 kcah 640 641 642port m68000 643 644 hack gcc 3.3.2/gcc/ra-colorize.c 645 cdate Wed Nov 5 11:03:13 EST 2003 646 who mrg 647 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 648 descr 649 ra-colorize.c causes a whole spew of unreferenced .L* local 650 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 651 Note this has been fixed in 3.3.3 at least on m68k, 652 but it hasn't been confirmed on sun2/m68000. 653 (it's too slow even on emulator and unlikely to build 654 toolchains on sun2 with its maximum 4MB RAM) 655 kcah 656 657port sparc64 658 659 hack disable optimzations for uvm_bio.c on 32 bit kernels 660 cdate Sun Mar 21 14:14:04 MET 2004 661 who martin 662 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 663 file sys/arch/sparc64/conf/files.sparc64 : 1.93 664 descr 665 The sparc compiler miscompiles uvm_bio.c when using 666 any optimization. This results in ubc_release panics. 667 kcah 668 669port macppc 670 671 hack remove inline from rotate_{left,right} 672 cdate Tue Feb 22 13:43:25 EST 2005 673 who christos 674 file src/dist/bind/lib/dns/rbt.c 675 descr 676 The macppc gcc-3.3 compiler miscompiles rbt.c when these 677 functions are inlined. The error is: 678 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 679 .* named[368]: exiting (due to assertion failure) 680 This is reportedly fixed in gcc-3.4 681 kcah 682 683port mips 684 685 hack mips-shared-linker-load-address 686 cdate Fri Oct 7 08:33:10 UTC 2005 687 who simonb 688 file src/sys/kern/exec_elf32.c : 1.107 689 descr 690 With COMPAT_16 or previous enabled (which enables 691 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 692 load and run at address 0. The check to fix this in 693 rev 1.107 only checks the first psection of the ELF 694 executable, which may not be loadable. A more correct 695 fix is to check the first loadable psection instead of 696 just the first psection. 697 kcah 698 699 hack mips-duplicate-ras-end-label 700 cdate Sat Sep 2 23:29:42 2006 701 who martin 702 file src/regres/sys/kern/ras/ras3/Makefile : 1.3 703 descr 704 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 705 labels by duplicated __asm output from RAS_END() 706 macro. 707 kcah 708 709port i386 710 711 hack minus-Os-broken-machdep-c 712 cdate Mon Jul 31 13:09:01 EDT 2006 713 who christos 714 file src/sys/arch/machdep.c : 1.576 715 descr 716 gcc-4 miscompiles this file with -Os and the resulting 717 kernel resets as reported in PR33725 718 kcah 719 720 hack use volatile intermediate variable to enforce rounding 721 cdate Tue Aug 1 22:15:55 MEST 2006 722 who drochner 723 file src/lib/libm/src/lrintf.c : 1.4 724 file src/lib/libm/src/s_rintf.c : 1.8 725 descr 726 gcc-4 does subsequent operations on "float" values within 727 the i387 FPU without rounding the intermediate results 728 kcah 729