HACKS revision 1.159
1# $NetBSD: HACKS,v 1.159 2015/05/08 09:44:45 martin Exp $ 2# 3# This file is intended to document workarounds for currently unsolved 4# (mostly) compiler bugs. 5# 6# Format: 7# hack title 8# cdate creation date 9# mdate mod date 10# who responsible developer 11# port ... 12# affected ports, space separated, if not "all" 13# file affected file : revision : line from : line to 14# affected files and revision and line numbers describing hack 15# multiple lines if necessary. 16# pr NNNN ... 17# problem reports this hack works around, if known. Space 18# separated. 19# regress src/regress/directory/where/test/found 20# regression test directories, if available. 21# descr 22# insert short informal description (multi-line). (Longer ones 23# should be in the PR database. More formal descriptions might 24# be in the regress tree. See above). 25# kcah 26# closing bracket. 27# 28# this is a comment. 29 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 gcc-strict-aliasing 88cdate 6 August 2004 89who junyoung 90pr 26516 91file src/usr.sbin/racoon/racoon/Makefile : 1.21 92descr 93 GCC issues a warning "dereferencing type-punned pointer will break 94 strict-aliasing rules" when compiling 95 crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this 96 is due to use of type casting in a non-standard way in the code and 97 not a compiler bug. Once a new release of KAME with a proper fix 98 applied is imported this should be backed out. 99kcah 100 101hack gcc4 wrong uninitialized variable 102mdate 10 May 2006 103who mrg 104file bin/ksh/eval.c : 1.6 105file bin/sh/histedit.c : 1.39 106file bin/sh/parser.c : 1.60 107file crypto/dist/heimdal/kdc/524.c : 1.10 108file crypto/dist/ssh/sftp.c : 1.20 109file crypto/dist/ssh/ssh-keysign.c : 1.11 110file dist/ipf/lib/hostname.c : 1.2 111file dist/ipf/tools/ipmon.c : 1.8 112file dist/ntp/ntpd/ntp_request.c : 1.4 113file dist/ntp/ntpd/refclock_shm.c : 1.4 114file dist/ntp/sntp/timing.c : 1.3 115file dist/pppd/pppstats/pppstats.c : 1.3 116file dist/smbfs/lib/smb/rap.c : 1.6 117file dist/tcpdump/print-zephyr.c : 1.5 118file distrib/utils/sysinst/aout2elf.c : 1.12 119file gnu/libexec/uucp/uucico/uucico.c : 1.6 120file lib/libc/citrus/citrus_csmapper.c : 1.6 121file lib/libc/citrus/citrus_pivot_factory.c : 1.5 122file lib/libc/inet/inet_cidr_ntop.c : 1.3 123file lib/libc/inet/inet_ntop.c : 1.3 124file lib/libc/stdio/vfwprintf.c : 1.8 125file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 126file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 127file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 128file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 129file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 130file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 131file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 132file sbin/fsck_ext2fs/dir.c : 1.19 133file sbin/routed/rtquery/rtquery.c : 1.18 134file sys/arch/amd64/amd64/pmap.c : 1.26 135file sys/arch/i386/pci/piixpcib.c : 1.4 136file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 137file sys/crypto/cast128/cast128.c : 1.9 138file sys/ddb/db_command.c : 1.86 139file sys/dev/cardbus/cardbus_map.c : 1.21 140file sys/dev/fss.c : 1.25 141file sys/dev/ic/igsfb.c : 1.39 142file sys/dev/ic/mb86950.c : 1.5 143file sys/dev/ic/midway.c : 1.71 144file sys/dev/kttcp.c : 1.18 145file sys/dev/rasops/rasops_bitops.h : 1.9 146file sys/dev/pci/cmpci.c : 1.31 147file sys/dev/pci/machfb.c : 1.45 148file sys/dev/usb/ohci.c : 1.174 149file sys/dev/usb/uhci.c : 1.196 150file sys/dev/rasops/rasops_bitops.h : 1.9 151file sys/dist/ipf/netinet/ip_nat.c : 1.10 152file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 153file sys/dist/pf/net/pf.c : 1.22 154file sys/fs/udf/udf_vnops.c : 1.4 155file sys/kern/kern_sig.c : 1.219 156file sys/kern/tty.c : 1.181 157file sys/net/bpf.c : 1.116 158file sys/net/zlib.c : 1.26 159file sys/netccitt/if_x25subr.c : 1.37 160file sys/netinet/in.c : 1.107 161file sys/netsmb/smb_smb.c : 1.27 162file sys/netsmb/smb_trantcp.c : 1.22 163file sys/nfs/nfs_serv.c : 1.108 164file sys/nfs/nfs_socket.c : 1.129 165file sys/nfs/nfs_syscalls.c : 1.91 166file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 167file usr.bin/ftp/ftp.c : 1.140 168file usr.bin/find/function.c : 1.54 169file usr.bin/mail/tty.c : 1.20 170file usr.bin/msgc/msg_sys.def : 1.33-1.34 171file usr.bin/nl/nl.c : 1.7 172file usr.bin/systat/keyboard.c : 1.23 173file usr.bin/usbhidctl/usbhid.c : 1.29 174file usr.bin/vi/cl/cl_read.c : 1.5 175file usr.bin/vi/ex/ex_cscope.c : 1.12 176file usr.bin/vi/ex/ex_tag.c : 1.19 177file usr.bin/vi/vi/v_txt.c : 1.15 178file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 179file usr.sbin/cron/do_command.c : 1.19 180file usr.sbin/timed/timed/slave.c : 1.15 181descr 182 GCC 4.1 gets many uninitialised variable warnings wrong. We should 183 really audit all the old hacks like this when older compilers are 184 removed from the tree, as many are probably no longer required. 185 The problem is that it does not recognize initialization via function 186 call pointer. I.e. 187 int p; 188 foo(&p); 189 does not mark p as initialized. 190kcah 191 192hack gcc4 pointer sign and strict aliasing problems 193mdate 10 May 2006 194who mrg 195file bin/ed/Makefile : 1.33 196file distrib/utils/sysinst/Makefile.inc : 1.44 197file distrib/utils/x_dhclient/Makefile : 1.15 198file games/bcd/Makefile : 1.5 199file games/dab/Makefile : 1.5 200file games/larn/Makefile : 1.17 201file games/pom/Makefile : 1.5 202file lib/libasn1/Makefile : 1.26 203file lib/libcrypt/Makefile : 1.17 204file lib/libgssapi/Makefile : 1.16 205file lib/libhdb/Makefile : 1.20 206file lib/libkadm5clnt/Makefile : 1.21 207file lib/libkadm5srv/Makefile : 1.25 208file lib/libkrb5/Makefile : 1.35 209file lib/libssh/Makefile : 1.6 210file lib/libtelnet/Makefile : 1.26 211file libexec/getty/Makefile : 1.14 212file libexec/kadmind/Makefile : 1.19 213file libexec/kpasswdd/Makefile : 1.14 214file sbin/atactl/Makefile : 1.3 215file sbin/cgdconfig/Makefile : 1.7 216file sbin/clri/Makefile : 1.13 217file sbin/dkctl/Makefile : 1.4 218file sbin/dump/Makefile : 1.33 219file sbin/fdisk/Makefile : 1.35 220file sbin/fsck_ext2fs/Makefile : 1.11 221file sbin/fsck_ffs/Makefile : 1.29 222file sbin/fsdb/Makefile : 1.18 223file sbin/mount_smbfs/Makefile : 1.4 224file sbin/newfs/Makefile : 1.30 225file sbin/newfs_sysvbfs/Makefile : 1.2 226file sbin/restore/Makefile : 1.23 227file sbin/veriexecctl/Makefile : 1.11 228file sys/lib/libsa/Makefile : 1.59 229file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 230file usr.bin/awk/Makefile : 1.9 231file usr.bin/crontab/Makefile : 1.24 232file usr.bin/ctags/Makefile : 1.8 233file usr.bin/gzip/Makefile : 1.10 234file usr.bin/ssh/sftp/Makefile : 1.10 235file usr.bin/ssh/ssh/Makefile : 1.25 236file usr.bin/vi/build/Makefile : 1.26 237file usr.bin/telnet/Makefile : 1.40 238file usr.bin/tn3270/tn3270/Makefile : 1.36 239file usr.bin/tr/Makefile : 1.4 240file usr.sbin/amd/amd/Makefile : 1.27 241file usr.sbin/amd/amq/Makefile : 1.14 242file usr.sbin/amd/libamu/Makefile : 1.20 243file usr.sbin/amd/pawd/Makefile : 1.5 244file usr.sbin/bind/Makefile.inc : 1.22 245file usr.sbin/bind/libdns/Makefile : 1.3 246file usr.sbin/bind/named/Makefile : 1.17 247file usr.sbin/bootp/bootptest/Makefile : 1.2 248file usr.sbin/chrtbl/Makefile : 1.6 249file usr.sbin/cron/Makefile : 1.12 250file usr.sbin/dhcp/Makefile.inc : 1.20 251file usr.sbin/dumplfs/Makefile : 1.11 252file usr.sbin/hprop/Makefile : 1.13 253file usr.sbin/installboot/Makefile : 1.35 254file usr.sbin/ipf/ipftest/Makefile : 1.32 255file usr.sbin/isdn/isdnd/Makefile : 1.6 256file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 257file usr.sbin/isdn/isdntel/Makefile : 1.2 258file usr.sbin/isdn/isdntrace/Makefile : 126 259file usr.sbin/mopd/common/Makefile : 1.10 260file usr.sbin/mopd/mopd/Makefile : 1.9 261file usr.sbin/mopd/mopprobe/Makefile : 1.7 262file usr.sbin/makefs/Makefile : 1.17 263file usr.sbin/mscdlabel/Makefile : 1.5 264file usr.sbin/pkg_install/add/Makefile : 1.7 265file usr.sbin/pkg_install/create/Makefile : 1.5 266file usr.sbin/pkg_install/lib/Makefile : 1.28 267file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 268file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 269file usr.sbin/pppd/Makefile.inc : 1.3 270file usr.sbin/pppd/pppd/Makefile : 1.38 271file usr.sbin/rarpd/Makefile : 1.10 272file usr.sbin/rbootd/Makefile : 1.10 273file usr.sbin/rpc.pcnfsd/Makefile : 1.17 274file usr.sbin/rtadvd/Makefile : 1.9 275file usr.sbin/tcpdump/Makefile : 1.42 276file usr.sbin/wiconfig/Makefile : 1.3 277descr 278 GCC 4.1 warns on pointer sign comparision/assignments and lots of 279 code does not conform. For now we use -Wno-pointer-sign and 280 -fno-strict-aliasing. 281kcah 282 283hack disable ctf for gcc-4.8 build 284mdate April 3 2014 285who christos 286file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 287file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 288descr 289 nbctfconvert -g -L VERSION -g fold-const.o 290 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 291 ((null)) <13532> 292kcak 293 294hack emacs aborting on exit (libgcc issue) 295mdate 7 November 2011 296who christos 297file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 298descr 299 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 300 to do just that. If the symbol requested is not found, then it aborts. 301 emacs 23.3 triggers this assertion. For now disable aborting, and 302 silently ignore. 303kcah 304 305hack cross-building hack on Darwin 306mdate 20 July 2008 307who agc 308file src/distrib/common/Makefile.mdset : 1.33 309descr 310 Darwin has problems with getopt() when used in mdsetimage -v, 311 due to the difference between BSD and libiberty() getopt 312 implementations, more fully described in 313 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 314 and the subsequent thread. For just now, we just have an ugly 315 workaround not to call mdsetimage with the -v argument on Darwin 316kcah 317 318hack avoid rebuilding asn1 libraries 319mdate 03 August 2008 320who veego 321file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 322file src/lib/libasn1/Makefile : 1.32 323file src/lib/libhdb/Makefile : 1.23 324file src/lib/libgssapi/Makefile : 1.20 325file src/lib/libhx509/Makefile : 1.3 326pr 9702 39185 327descr 328 asn1_compile does not check if generated header files do not have to 329 be rebuild. 330 Generate .hx files and copy it in the Makefiles if they changed. 331kcah 332 333hack avoid gcc4 -O1 bug in loop optimize 334cdate 29 November 2008 335who tsutsui 336file src/sbin/ifconfig/Makefile : 1.39 337pr 40036 40066 338descr 339 gcc -O1 seems to generate wrong code in loop optimize so that 340 ifconfig lo0 inet6 doesn't return error even if a kernel 341 doesn't have IPv6 support. (see the above PRs for details) 342 For workaround, specify -fno-loop-optimize on m68000, 343 which uses -O1 by default. 344kcah 345 346hack MKPIE ldscript for /usr.sbin/crash 347cdate 22 April 2010 348who christos 349file src/usr.sbin/crash/Makefile : 1.5 350file src/usr.sbin/crash/ldscript.crash : 1.1 351pr N/A 352descr 353 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 354 sections 355kcah 356 357hack Disable fortification for /usr/bin/makeinfo 358cdata 24 Mar 2014 359who tron 360file src/gnu/usr.bin/texinfo/makeinfo/Makefile : 1.8 361pr N/A 362descr 363 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 364 it fails to process certain texinfo files, e.g. "cl.texi" 365 included in the Emacs 24.3 distribution. 366kcah 367 368hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 369cdata 05 Apr 2014 370who tron 371file src/external/mit/xorg/bin/xauth/Makefile : 1.4 372pr N/A 373descr 374 If "xauth" is compile with "USE_SSP" set to "yes" it fails 375 mysteriously with an error message like this: 376 377 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 378 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 379 380 The compiler seems to get confused about the two filename variables 381 used in the link(2) system call. 382kcah 383 384port vax 385 386 hack gcc4/vax ICE 387 cdate 388 who tsutsui 389 file sys/arch/vax/conf/Makefile.vax 390 descr 391 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 392 -fno-tree-ter prevents it so add it to COPTS. 393 kcah 394 395 hack gcc4/vax compiler crash 396 cdate Fri Jun 30 22:39:12 PDT 2006 397 who mrg 398 file bin/csh/Makefile : 1.27 399 file lib/i18n_module/UTF7/Makefile : 1.2 400 descr 401 GCC4 on vax crashes. -O0 stops it happening so far... 402 kcah 403 404 hack gcc 2.95/vax doesn't like abort being used as function pointer 405 cdate Tue Dec 13 05:54:50 GMT 2005 406 who jmc 407 file lib/libc/rpc/svc_vc.c 1.15 408 descr 409 Provide a local definition for abort which doesn't include 410 the noreturn attribute which trips up gcc 2.95 on vax. 411 kcah 412 413 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 414 cdate Mon May 9 12:16:22 CDT 2005 415 who jmc 416 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 417 gnu/usr.bin/gettext/libgrep/Makefile 1.3 418 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 419 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 420 descr 421 The latest gettext assumes a C99 environment or at least 422 configure checks to work around this. As we don't use configure 423 provide a stdbool.h for vax builds locally in directories from 424 the template provided by the gettext code. 425 kcah 426 427 hack gcc 2.95/vax cannot handle __builtin_ffs() 428 cdate Fri Aug 23 21:31:15 CEST 2002 429 who ragge 430 file sys/lib/libkern/libkern.h : 1.42 431 descr 432 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 433 added this feature to GCC 3 so it can be removed when switching. 434 kcah 435 436 hack gcc 2.95/vax libbz2 437 mdate 27 Jun 2002 438 who thorpej 439 file lib/libbz2/Makefile 440 descr 441 libbz2 is mis-compiled with optimization with GCC 2.95.3 442 on VAX. -O0 works around this problem. 443 kcah 444 445 hack vax Toolchain bug 446 cdate 28 Mar 2003 447 who he 448 file sys/arch/vax/vax/intvec.S : 1.5 449 descr 450 Workaround for PR toolchain/20924. The assembler apparently 451 tries to range-check byte offsets when it doesn't have 452 sufficient information to make that decision. 453 Workaround uses `brw' instead of `brb' instruction. 454 kcah 455 456 hack vax gcc 2.95.3 -Wuninitialized workarounds 457 cdate 6 Nov 2003 458 who he 459 file sys/dev/bi/if_ni.c : 1.22 460 file sys/arch/vax/vax/ctu.c : 1.20 461 descr 462 Workaround for gcc 2.95.3 failing to detect that certain 463 variables will be initialized; so that this code compiles 464 with -Wuninitialized. Should be reviewed and possibly 465 reverted when gcc 3.3.2 is ready for vax. 466 kcah 467 468 hack vax gcc 2.95.3 structure initialization 469 cdat 13 May 2004 470 who cl 471 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 472 descr 473 Workaround for gcc 2.95.3 failing to initialize structures 474 and/or unions inside structures using nested designators. 475 Should be reverted when gcc >=3.3.3 is ready for vax. 476 kcah 477 478 hack vax gcc 2.95.3 needs -I. to build nslexer.c 479 cdat 6 Jun 2004 480 who mhitch 481 file lib/libc/arch/vax/Makefile.inc : 1.6 482 descr 483 It appears necessary to add -I. to CPPFLAGS when building 484 nslesxer.c. This may be caused by gcc 2.95.3 being used. 485 Should be reverted when a newer gcc is ready for vax. 486 kcah 487 488 hack vax gcc 2.95.3 doesn't understand "-std=c99" 489 cdat 5 April 2005 490 who tron 491 file src/share/mk/bsd.sys.mk 492 descr 493 We cannot use "-std=c99" for compiler warning level 4 and above 494 because gcc 2.95.3 doesn't support that option. 495 kcah 496 497 hack declare boolean_t in two IPF user-mode programs 498 cdate Tue Mar 7 19:19:20 CET 2006 499 who he 500 file dist/ipf/ipsend/iptests.c : 1.8 501 dist/ipf/ipsend/sock.c : 1.7 502 descr 503 The IPF user-mode programs ipsend and iptest first 504 include <sys/types.h> without _KERNEL defined, and 505 later include <sys/file.h> with _KERNEL defined. 506 This causes a build failure when building for vax, 507 since <sys/device.h> ends up being included without 508 bollean_t being defined by <sys/types.h>. 509 Build failure and further details documented in 510 PR#32907. 511 kcah 512 513 hack pcc 0.9.9 large string literals 514 cdat 8 July 2008 515 who gmcgarry 516 file sys/conf/param.c : 1.58 517 descr 518 Workaround for pcc 0.9.9 not handling large string literals 519 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 520 fail compilation. 521 There is a proposal on the pcc mailing list to stuff config 522 file in ELF section. 523 kcah 524 525 hack xorg warnings 526 cdat 30 July 2008, 3 June, 2013 527 who mrg 528 file external/mit/xorg/lib/libSM/Makefile : 1.2 529 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 530 external/mit/xorg/lib/libXext/Makefile : 1.2 531 external/mit/xorg/lib/libXfont/Makefile : 1.2 532 descr 533 Disable several warnings or use -Wno-error across Xorg sources 534 while we get them working 535 kcah 536 537 hack 32 bit time leftovers 538 cdat 11 January 2009 539 who christos 540 file lib/libc/time/localtime.c : 1.41 541 lib/libc/time/zic.c : 1.23 542 descr 543 The timezone compiled files still contain 32 bit time_t 544 quantities. I did not want to version the files because 545 the ``parser'' is too ugly for words. What needs to be 546 done, is to rewrite the parser from scratch also to avoid 547 potential core-dumps from parsing invalid files. 548 kcah 549 550 hack 32 bit time leftovers 551 cdat 11 January 2009 552 who christos 553 file various 554 descr 555 Many filesystem on-disk formats have 32 bit times. 556 kcah 557 558 hack gcc 4.5 fsdb miscompile 559 date Sat Nov 9 11:03:02 EST 2013 560 who christos 561 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 562 descr 563 src/sbin/fsdb/fsdb.c: In function 'findblk': 564 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 565 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 566 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 567 (const_int 8 [0x8])) 568 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 569 -1 (nil)) 570 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 571 extract_insn, at recog.c:2103 572 kcah 573 574 hack gcc 4.8 gcc miscompiles 575 date Sat Nov 9 16:35:18 EST 2013 576 who christos 577 file distrib/utils/x_ping/Makefile 578 file distrib/vax/miniroot/Makefile.inc 579 file distrib/vax/ramdisk/Makefile 580 file external/gpl3/gdb/lib/libdecnumber/Makefile 581 file sbin/fsdb/Makefile 582 file sbin/newfs_ext2fs/Makefile 583 file sbin/ping/Makefile 584 file usr.sbin/lmcconfig/Makefile 585 file usr.sbin/mtrace/Makefile 586 descr 587 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 588 internal compiler error: in change_address_1, at emit-rtl.c:2019 589 external/gpl3/gcc/dist/gcc/recog.c:770:1: 590 internal compiler error: in change_address_1, at emit-rtl.c:2019 591 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 592 internal compiler error: in change_address_1, at emit-rtl.c:2019 593 sbin/ping/ping.c:679:1: 594 internal compiler error: in change_address_1, at emit-rtl.c:2019 595 sbin/newfs_ext2fs/mke2fs.c:681:1: 596 internal compiler error: in reload_combine_note_use, 597 at postreload.c:1561 598 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 599 internal compiler error: in change_address_1, at emit-rtl.c:2019 600 usr.sbin/lmcconfig/lmcconfig.c:939:3: 601 internal compiler error: in reload_combine_note_use, 602 at postreload.c:1561 603 usr.sbin/mtrace/mtrace.c:1655:1: 604 internal compiler error: in change_address_1, at emit-rtl.c:2019 605 kcah 606 607port arm 608 609 hack gcc-unsigned-compare 610 cdate 09 Mar 2002 611 mdate 18 Mar 2002 612 who bjh21 613 file dist/bind/lib/nameser/ns_parse.c : 1.3 614 file dist/dhcp/minires/ns_parse.c : 1.3 615 file dist/dhcp/omapip/result.c : 1.2 616 file dist/dhcp/server/failover.c : 1.3 617 file gnu/dist/toolchain/bfd/bfd.c : 1.2 618 file gnu/dist/toolchain/bfd/format.c : 1.2 619 file gnu/dist/toolchain/gdb/target.c : 1.2 620 file sys/kern/vfs_subr.c : 1.172 621 descr When checking that a potentially-unsigned enum is >= 0, assign 622 it to an int first. This is necessary to avoid "comparison is 623 always true" warnings with -fshort-enums. Casting to an int 624 really should be enough, but turns out not to be. 625 kcah 626 627 hack gcc-4.5 arm CNAME hostname lookup failure on 628 certain DNS environment (probably -ftree-ter problem) 629 cdate Sat Dec 24 04:59:00 UTC 2011 630 mdate 631 who tsutsui 632 file lib/libc/net/Makefile.inc 1.79 633 descr Hostname lookup against CNAMEs by some commands fails 634 on certain DNS environments if lib/libc/net/gethnamaddr.c 635 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 636 are compiled with -O2, even though nslookup(1) against 637 the same CNAME returns proper hostname. 638 They works properly if compiled with -O2 -fno-tree-ter. 639 Also -O2 fails but -O2 -fno-tree-ter works on the following 640 test case in gcc bugzilla: 641 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 642 kcah 643 644 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 645 cdate Wed Nov 14 13:02:02 JST 2012 646 who msaitoh 647 file lib/libc/softfloat/Makefile.inc 648 pr 46953 649 regress src/tests/lib/libm/t_cbrt 650 regress src/tests/lib/libm/t_ceil 651 regress src/tests/lib/libm/t_exp 652 regress src/tests/lib/libm/t_log 653 regress src/tests/lib/libm/t_scalbn 654 regress src/tests/lib/libm/t_sinh 655 regress src/tests/lib/libm/t_sqrt 656 descr Gcc has a bug in tree optimization. For adddf3, 657 -INF + -INF returns 0 without -fno-tree-vrp. 658 Debugging with -fdump-tree-all shows that 659 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 660 is broken. 661 kcah 662 663port sh3 664 665 hack gcc4-sh3-bz2 666 cdate Sun May 21 03:34:57 UTC 2006 667 mdate Fri May 16 13:13:00 UTC 2008 668 who mrg, tsutsui 669 file lib/libbz2/Makefile : 1.10 670 descr 671 The in-tree GCC 4.1-based compiler generated too-far 672 pc-relative addresses. Hack is to build with 673 -fno-loop-optimize. 674 kcah 675 676port sh3eb 677 hack gcc4.8.1 678 cdate Thu Nov 7 16:31:23 EST 2013 679 who christos 680 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 681 desrc 682 for profiling 683 compile l2cap_signal.c with -O0 to avoid: 684 ./netbt/l2cap_signal.c:36: 685 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 686 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 687 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 688 impossible reload 689 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 690 kcah 691 692port sh3el 693 hack gcc4.8.1 694 cdate Fri Nov 8 19:27:01 EST 2013 695 who christos 696 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 697 desrc 698 for profiling 699 compile evdns.c with -O0 to avoid: 700 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 701 impossible reload 702 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 703 kcah 704 705 hack gcc4.8.1 706 cdate Fri Nov 8 19:34:48 EST 2013 707 who christos 708 file src/usr.sbin/racoon/Makefile : 1.27 709 desrc 710 for profiling 711 compile ipsec_doi.c with -O0 to avoid: 712 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 713 impossible reload 714 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 715 kcah 716 717port m68000 718 719 hack gcc4-m68000 720 cdate Fri Feb 8 10:29:37 PST 2008 721 mdate Sun May 4 15:37:19 UTC 2008 722 who mrg, tsutsui 723 file rescue/Makefile : 1.21 724 file sbin/dump_lfs/Makefile : 1.9 725 file sbin/fsck_ffs/Makefile : 1.35 726 file sbin/fsdb/Makefile : 1.22 727 file share/mk/sys.mk : 1.96 728 file usr.sbin/ndbootd/Makefile : 1.5 729 descr 730 Several internal compiler errors with gcc -O1 731 around 64bit integer arithmetic. 732 This hack uses -O1 and adds some -fno-tree-foo options 733 to avoid the problem. 734 This might be related with GCC Bugzilla Bug 32424. 735 kcah 736 737port m68k,sh3,vax 738 739 hack gcc-4.8.1 740 cdate Wed Nov 6 20:41:35 EST 2013 741 who christos 742 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 743 descr 744 compile hashtable_c++0x.cc with -O2 instead of -Os to 745 produce missing instantiation of std::lower_bound expansion 746 for unsigned long. 747 kcah 748 749port sparc 750 751 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 752 cdate Sun Aug 14 19:26:48 PDT 2011 753 who mrg 754 file sys/arch/sparc64/sparc/cpu.c : 1.234 755 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 756 file sys/arch/sparc64/sparc/genassym.cf : 1.67 757 file sys/arch/sparc64/sparc/locore.s : 1.265 758 descr 759 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 760 Post newlock2 there was a bug where a lock was reduced from 761 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 762 would crash due to NULL IPI. This was fixed by re-using the 763 right IPL value. However, GCC 4.5.3 build kernels have the 764 same problems. For now, the hack is re-instated. 765 kcah 766 767 768port mips 769 770 hack mips-shared-linker-load-address 771 cdate Fri Oct 7 08:33:10 UTC 2005 772 who simonb 773 file src/sys/kern/exec_elf32.c : 1.107 774 descr 775 With COMPAT_16 or previous enabled (which enables 776 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 777 load and run at address 0. The check to fix this in 778 rev 1.107 only checks the first psection of the ELF 779 executable, which may not be loadable. A more correct 780 fix is to check the first loadable psection instead of 781 just the first psection. 782 kcah 783 784 hack mips-duplicate-ras-end-label 785 cdate Sat Sep 2 23:29:42 2006 786 who martin 787 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 788 descr 789 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 790 labels by duplicated __asm output from RAS_END() 791 macro. 792 kcah 793 794 hack mips-mcount-assembler-warning 795 cdate Tue Jul 29 14:16:52 UTC 2008 796 who lukem 797 file src/lib/libc/gmon/Makefile.inc : 1.8 798 descr 799 Workaround for PR port-mips/39192. 800 common/lib/libc/gmon/mcount.c generates a (fatal) 801 assembler warning on MIPS: 802 Warning: No .cprestore pseudo-op used in PIC code 803 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 804 kcah 805 806port i386 807 808 hack use volatile intermediate variable to enforce rounding 809 cdate Tue Aug 1 22:15:55 MEST 2006 810 who drochner 811 file src/lib/libm/src/lrintf.c : 1.4 812 file src/lib/libm/src/s_rintf.c : 1.8 813 descr 814 gcc-4 does subsequent operations on "float" values within 815 the i387 FPU without rounding the intermediate results 816 kcah 817 818port x86 819 hack turn off optimization for biosdisk_ll.c because otherwise 820 we are pass the wrong arguments to biosdisk_read(). 821 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 822 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 823 who christos 824 file src/sys/arch/i386/stand/lib/Makefile : 1.38 825 descr 826 Turning on DISK_DEBUG shows the problem. We should find 827 out which option is causing this. 828 hcah 829 830port powerpc 831 832 hack avoid using __builtin_return_address(0) because it fails in 833 Xorg's module loader 834 cdate Sat Sep 27 03:52:05 UTC 2008 835 who macallan 836 file src/libexec/ld.elf_so/rtld.c : 1.121 837 descr 838 workaround for PR port-macppc/37812 839 kcah 840 841 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 842 building the native compiler via build.sh those don't defined 843 properly. 844 cdate Sat Mar 12 08:00:00 UTC 2011 845 who matt 846 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 847 descr 848 see above 849 kcah 850 851port powerpc64 852 853 hack include _errno.c in libposix so that __errno resolves. It 854 should resolve from libc's errno, but somehow it does not. 855 Linker bug? 856 cdate Thu Oct 27 13:19:47 EDT 2011 857 who christos 858 file src/lib/libposix/Makefile: 1.15 859 file src/lib/librt/Makefile: 1.14 860 descr 861 workaround for: 862 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 863 R_PPC64_REL24 relocation against symbol `.__errno' 864 kcah 865 866 hack rename data() function in mdocml to avoid redefined error. 867 Compiler/Assembler bug? 868 cdate Sat Oct 29 11:16:01 EDT 2011 869 who christos 870 file src/external/bsd/mdocml/tbl_data.c: 1.2 871 descr 872 workaround for: 873 {standard input}: Assembler messages: 874 {standard input}:105: Error: symbol `.data' is already \ 875 defined 876 kcah 877 878port emips 879 880 hack Add nop between ctc1 and mtc0 to avoid assembler internal 881 error 882 cdate Sat Oct 29 16:57:34 EDT 2011 883 who christos 884 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 885 descr 886 workaround for: 887 {standard input}: Assembler messages: 888 {standard input}:730: Internal error! 889 Assertion failure in append_insn at /usr/src/external/gpl3/\ 890 binutils/dist/gas/config/tc-mips.c line 2910. 891 kcah 892 893port ia64 894 895 hack libc hesiod.c file does not compile with -O2 (internal 896 compiler error in gcc 4.5.3) 897 cdate Thu Dec 27 08:05:43 CET 2012 898 who martin 899 file src/lib/libc/net/Makefile.inc: 1.82 900 descr 901 workaround for: 902 {standard input}: Assembler messages: 903 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 904 {standard input}:1506: Warning: This is the location of the conflicting usage 905 {standard input}: Error: 2 warnings, treating warnings as errors 906 kcah 907 908 hack libelf libelf_extended.c compiler error in gcc 4.5.3 909 cdate Thu Dec 27 09:05:51 CET 2012 910 who martin 911 file src/external/bsd/libelf/lib/Makefile: 1.3 912 descr 913 workaround for: 914 {standard input}: Assembler messages: 915 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 916 {standard input}:87: Warning: Only the first path encountering the conflict is reported 917 {standard input}:85: Warning: This is the location of the conflicting usage 918 kcah 919 920 hack compiler error with gcc 4.5.x 921 cdate Thu Dec 27 15:15:25 CET 2012 922 who martin 923 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 924 descr 925 workaround for: 926 {standard input}: Assembler messages: 927 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 928 {standard input}:22978: Warning: This is the location of the conflicting usage 929 kcah 930 931 hack libgcc unwind dummy function 932 cdate Fri Apr 17 14:31:03 CEST 2015 933 who martin 934 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 935 descr 936 Add an empty _Unwind_FindTableEntry() implementation. 937 In the end we will use our libc stuff, and this should 938 go away again. 939 kcah 940 941port x68k 942 943 hack compiler error with gcc 4.5.x 944 cdate Fri May 24 13:23:01 EDT 2013 945 who christos 946 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 947 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 948 src/x11/lib/GLU/Makefile: 1.9 949 descr 950 workaround for: 951 internal compiler error: in cselib_record_set, at cselib.c:1999 952 kcah 953 954hack fallback to /usr/bin/clang-cpp in rpcgen 955cdate Wed Jun 5 15:49:27 CEST 2013 956who joerg 957file src/usr.bin/rpcgen/rpc_main.c 958descr 959 It is undecided which compiler owns /usr/bin/cpp and whether it should 960 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 961 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 962 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 963kcah 964 965port hppa 966 967 hack compiler error with gcc 4.5.x 968 cdate Tue Jul 23 07:42:28 BST 2013 969 who skrll 970 file src/sys/lib/libkern/Makefile.libkern: 1.26 971 descr 972 workaround for unanalysed codegen bug affecting md5c.c. 973 kcah 974 975 hack gdb vs _rtld_debug_state problem 976 cdate Thu Mar 5 09:49:53 UTC 2015 977 who skrll 978 file src/libexec/ld.elf_so/rtld.c: 1.175 979 descr 980 workaround for problem where gdb misses the breakpoint on 981 _rtld_debug_state when the function is only the 982 bv,n %r0(%rp) instruction - the nullify seems to 983 confuse something 984 kcah 985 986port mips64* 987hack compiler crashes on mips64* with optimization enabled 988cdate Tue May 13 18:46:48 UTC 2014 989who macallan 990file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 991 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 992 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 993 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 994descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 995pr 48696 996kcah 997 998port vax 999hack compile boot with -O1 1000cdate Sat May 24 09:40:58 CEST 2014 1001who martin 1002file src/sys/arch/vax/boot/boot/Makefile: 1.41 1003descr /boot does not work when compiled with -O2 and gcc 4.8 1004kcah 1005 1006port arm 1007hack avoid using labels in a 12-bit constant. 1008who matt 1009file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 1010descr workaround for clang misassembling an instruction 1011kcah 1012