HACKS revision 1.232
1# $NetBSD: HACKS,v 1.232 2022/12/04 22:35:15 jakllsch 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 llvm needs no-unused-command-line-argument 31mdate 10 May 2020 32who maxv 33file share/mk/bsd.lib.mk 1.380 -> 1.381 34descr 35 To avoid LLVM warnings when compiling the kernel with special 36 CFLAGS such as KASAN on amd64 or ARMV83_PAC on aarch64, pass 37 -Wno-unused-command-line-argument. 38kcah 39 40hack static linking with libpthread 41mdate 7 May 2019 42who maya 43file src/lib/libpthread/Makefile 1.92 -> 1.94 44descr 45 To avoid some libc thread stub functions being picked up 46 in static builds, link pthread as one section. 47kcah 48 49hack disable optimization for gcc-9.3 in src/lib/libc/gdtoa/strtod.c 50mdate 18 Sep 2020 51who christos 52file src/lib/libc/gdtoa/strtod.c 1.15 -> 1.16 53descr 54 See PR/55668, the program there causes infinite loop 55kcah 56 57hack gcc-5.3 optimizes memset+malloc -> calloc inside calloc 58mdate 4 May 2016 59who christos 60file external/gpl2/lib/libmalloc/lib/Makefile 1.3 -> 1.5 61descr 62 resulting in infinite recursion; we prevent this with 63 -fno-builtin-malloc 64kcah 65 66hack turn off tree-vrp for parts of ufs_lookup.c 67mdate 28 April 2016 68who mrg christos 69file src/sys/ufs/ufs/ufs_lookup.c : 1.144 70pr 51094 71descr 72 with -ftree-vrp enabled in ufs_lookup.c sometimes bad dir 73 panicks are see. 74hcah 75 76hack netstat ieee1394 address printing. 77mdate 14 Nov 2000 78who matt 79file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 80descr 81 Because the current implementation of IP over IEEE1394, the 82 fw device address contains more than just the IEEE1394 EUI-64. 83 So when printing out IEEE1394 addresses, ignore the extra stuff. 84kcah 85 86hack xterm vs. libterm 87mdate 01 Aug 2000 88who jdc 89file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 90pr 10383 91descr 92 In order to extend the termcap string over 1023 bytes, a ZZ entry was 93 introduced to point to a memory location containing the full entry. 94 Without this hack, xterm will export a termcap containing the ZZ 95 entry, which will then be ignored by libterm. As xterm modifies the 96 exported termcap, this would cause those modifications to be ignored. 97kcah 98 99hack wi-at-big-endian-bus 100cdate 15 Mar 2002 101who martin 102file dev/ic/wireg.h : 1.20 103descr Add an option to access the underlying bus in big endian byte order 104 to work around deficiencies in bus_space_{read,write}_* macros. 105 Those don't allow the implementation of a proper pcmcia bus space 106 tag. 107kcah 108 109hack specific knowledge of colours in curses code 110cdate Sun Apr 6 11:05:24 BST 2003 111who jdc 112file lib/libcurses/color.c : r1.24 113descr 114 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 115 Fix is to enhance libtermcap to understand terminfo-style % sequences. 116 See also: 117 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 118kcah 119 120hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 121cdate 21 Aug 2003 122who he 123file sys/miscfs/procfs/procfs_linux.c : 1.14 124descr 125 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 126 literals/constants, but refer to variables of a type which is 127 not "unsigned long", causing compilation of procfs_linux.c to 128 fail with "makes integer from pointer without a cast". This 129 is observed on e.g. the sun3 port. Ideally the "types" for 130 symbols should be consistent across all ports. 131kcah 132 133hack gcc4 wrong uninitialized variable 134mdate 10 May 2006 135who mrg 136file bin/ksh/eval.c : 1.6 137file bin/sh/histedit.c : 1.39 138file bin/sh/parser.c : 1.60 139file crypto/dist/heimdal/kdc/524.c : 1.10 140file crypto/dist/ssh/sftp.c : 1.20 141file crypto/dist/ssh/ssh-keysign.c : 1.11 142file dist/ipf/lib/hostname.c : 1.2 143file dist/ipf/tools/ipmon.c : 1.8 144file dist/ntp/ntpd/ntp_request.c : 1.4 145file dist/ntp/ntpd/refclock_shm.c : 1.4 146file dist/ntp/sntp/timing.c : 1.3 147file dist/pppd/pppstats/pppstats.c : 1.3 148file dist/tcpdump/print-zephyr.c : 1.5 149file distrib/utils/sysinst/aout2elf.c : 1.12 150file gnu/libexec/uucp/uucico/uucico.c : 1.6 151file lib/libc/citrus/citrus_csmapper.c : 1.6 152file lib/libc/citrus/citrus_pivot_factory.c : 1.5 153file lib/libc/inet/inet_cidr_ntop.c : 1.3 154file lib/libc/inet/inet_ntop.c : 1.3 155file lib/libc/stdio/vfwprintf.c : 1.8 156file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 157file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 158file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 159file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 160file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 161file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 162file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 163file sbin/fsck_ext2fs/dir.c : 1.19 164file sbin/routed/rtquery/rtquery.c : 1.18 165file sys/arch/amd64/amd64/pmap.c : 1.26 166file sys/arch/i386/pci/piixpcib.c : 1.4 167file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 168file sys/crypto/cast128/cast128.c : 1.9 169file sys/ddb/db_command.c : 1.86 170file sys/dev/cardbus/cardbus_map.c : 1.21 171file sys/dev/fss.c : 1.25 172file sys/dev/ic/igsfb.c : 1.39 173file sys/dev/ic/mb86950.c : 1.5 174file sys/dev/ic/midway.c : 1.71 175file sys/dev/kttcp.c : 1.18 176file sys/dev/rasops/rasops_bitops.h : 1.9 177file sys/dev/pci/cmpci.c : 1.31 178file sys/dev/pci/machfb.c : 1.45 179file sys/dev/usb/ohci.c : 1.174 180file sys/dev/usb/uhci.c : 1.196 181file sys/dev/rasops/rasops_bitops.h : 1.9 182file sys/dist/ipf/netinet/ip_nat.c : 1.10 183file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 184file sys/dist/pf/net/pf.c : 1.22 185file sys/fs/udf/udf_vnops.c : 1.4 186file sys/kern/kern_sig.c : 1.219 187file sys/kern/tty.c : 1.181 188file sys/net/bpf.c : 1.116 189file sys/net/zlib.c : 1.26 190file sys/netccitt/if_x25subr.c : 1.37 191file sys/netinet/in.c : 1.107 192file sys/nfs/nfs_serv.c : 1.108 193file sys/nfs/nfs_socket.c : 1.129 194file sys/nfs/nfs_syscalls.c : 1.91 195file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 196file usr.bin/ftp/ftp.c : 1.140 197file usr.bin/find/function.c : 1.54 198file usr.bin/mail/tty.c : 1.20 199file usr.bin/msgc/msg_sys.def : 1.33-1.34 200file usr.bin/nl/nl.c : 1.7 201file usr.bin/systat/keyboard.c : 1.23 202file usr.bin/usbhidctl/usbhid.c : 1.29 203file usr.bin/vi/cl/cl_read.c : 1.5 204file usr.bin/vi/ex/ex_cscope.c : 1.12 205file usr.bin/vi/ex/ex_tag.c : 1.19 206file usr.bin/vi/vi/v_txt.c : 1.15 207file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 208file usr.sbin/cron/do_command.c : 1.19 209file usr.sbin/timed/timed/slave.c : 1.15 210descr 211 GCC 4.1 gets many uninitialised variable warnings wrong. We should 212 really audit all the old hacks like this when older compilers are 213 removed from the tree, as many are probably no longer required. 214 The problem is that it does not recognize initialization via function 215 call pointer. I.e. 216 int p; 217 foo(&p); 218 does not mark p as initialized. 219kcah 220 221hack gcc4 pointer sign and strict aliasing problems 222mdate 10 May 2006 223who mrg 224file bin/ed/Makefile : 1.33 225file distrib/utils/sysinst/Makefile.inc : 1.44 226file distrib/utils/x_dhclient/Makefile : 1.15 227file games/bcd/Makefile : 1.5 228file games/dab/Makefile : 1.5 229file games/larn/Makefile : 1.17 230file games/pom/Makefile : 1.5 231file lib/libasn1/Makefile : 1.26 232file lib/libcrypt/Makefile : 1.17 233file lib/libgssapi/Makefile : 1.16 234file lib/libhdb/Makefile : 1.20 235file lib/libkadm5clnt/Makefile : 1.21 236file lib/libkadm5srv/Makefile : 1.25 237file lib/libkrb5/Makefile : 1.35 238file lib/libssh/Makefile : 1.6 239file lib/libtelnet/Makefile : 1.26 240file libexec/getty/Makefile : 1.14 241file libexec/kadmind/Makefile : 1.19 242file libexec/kpasswdd/Makefile : 1.14 243file sbin/atactl/Makefile : 1.3 244file sbin/cgdconfig/Makefile : 1.7 245file sbin/clri/Makefile : 1.13 246file sbin/dkctl/Makefile : 1.4 247file sbin/dump/Makefile : 1.33 248file sbin/fdisk/Makefile : 1.35 249file sbin/fsck_ext2fs/Makefile : 1.11 250file sbin/fsck_ffs/Makefile : 1.29 251file sbin/fsdb/Makefile : 1.18 252file sbin/newfs/Makefile : 1.30 253file sbin/newfs_sysvbfs/Makefile : 1.2 254file sbin/restore/Makefile : 1.23 255file sbin/veriexecctl/Makefile : 1.11 256file sys/lib/libsa/Makefile : 1.59 257file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 258file usr.bin/awk/Makefile : 1.9 259file usr.bin/crontab/Makefile : 1.24 260file usr.bin/ctags/Makefile : 1.8 261file usr.bin/gzip/Makefile : 1.10 262file usr.bin/ssh/sftp/Makefile : 1.10 263file usr.bin/ssh/ssh/Makefile : 1.25 264file usr.bin/vi/build/Makefile : 1.26 265file usr.bin/telnet/Makefile : 1.40 266file usr.bin/tn3270/tn3270/Makefile : 1.36 267file usr.bin/tr/Makefile : 1.4 268file usr.sbin/amd/amd/Makefile : 1.27 269file usr.sbin/amd/amq/Makefile : 1.14 270file usr.sbin/amd/libamu/Makefile : 1.20 271file usr.sbin/amd/pawd/Makefile : 1.5 272file usr.sbin/bind/Makefile.inc : 1.22 273file usr.sbin/bind/libdns/Makefile : 1.3 274file usr.sbin/bind/named/Makefile : 1.17 275file usr.sbin/bootp/bootptest/Makefile : 1.2 276file usr.sbin/chrtbl/Makefile : 1.6 277file usr.sbin/cron/Makefile : 1.12 278file usr.sbin/dhcp/Makefile.inc : 1.20 279file usr.sbin/hprop/Makefile : 1.13 280file usr.sbin/installboot/Makefile : 1.35 281file usr.sbin/ipf/ipftest/Makefile : 1.32 282file usr.sbin/isdn/isdnd/Makefile : 1.6 283file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 284file usr.sbin/isdn/isdntel/Makefile : 1.2 285file usr.sbin/isdn/isdntrace/Makefile : 126 286file usr.sbin/mopd/common/Makefile : 1.10 287file usr.sbin/mopd/mopd/Makefile : 1.9 288file usr.sbin/mopd/mopprobe/Makefile : 1.7 289file usr.sbin/makefs/Makefile : 1.17 290file usr.sbin/mscdlabel/Makefile : 1.5 291file usr.sbin/pkg_install/add/Makefile : 1.7 292file usr.sbin/pkg_install/create/Makefile : 1.5 293file usr.sbin/pkg_install/lib/Makefile : 1.28 294file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 295file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 296file usr.sbin/pppd/Makefile.inc : 1.3 297file usr.sbin/pppd/pppd/Makefile : 1.38 298file usr.sbin/rarpd/Makefile : 1.10 299file usr.sbin/rbootd/Makefile : 1.10 300file usr.sbin/rpc.pcnfsd/Makefile : 1.17 301file usr.sbin/tcpdump/Makefile : 1.42 302descr 303 GCC 4.1 warns on pointer sign comparison/assignments and lots of 304 code does not conform. For now we use -Wno-pointer-sign and 305 -fno-strict-aliasing. 306kcah 307 308hack disable ctf for gcc-4.8 build 309mdate April 3 2014 310who christos 311file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 312file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 313descr 314 nbctfconvert -g -L VERSION -g fold-const.o 315 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 316 ((null)) <13532> 317kcak 318 319hack emacs aborting on exit (libgcc issue) 320mdate 7 November 2011 321who christos 322file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 323descr 324 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 325 to do just that. If the symbol requested is not found, then it aborts. 326 emacs 23.3 triggers this assertion. For now disable aborting, and 327 silently ignore. 328kcah 329 330hack cross-building hack on Darwin 331mdate 20 July 2008 332who agc 333file src/distrib/common/Makefile.mdset : 1.33 334descr 335 Darwin has problems with getopt() when used in mdsetimage -v, 336 due to the difference between BSD and libiberty() getopt 337 implementations, more fully described in 338 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 339 and the subsequent thread. For just now, we just have an ugly 340 workaround not to call mdsetimage with the -v argument on Darwin 341kcah 342 343hack avoid rebuilding asn1 libraries 344mdate 03 August 2008 345who veego 346file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 347file src/lib/libasn1/Makefile : 1.32 348file src/lib/libhdb/Makefile : 1.23 349file src/lib/libgssapi/Makefile : 1.20 350file src/lib/libhx509/Makefile : 1.3 351pr 9702 39185 352descr 353 asn1_compile does not check if generated header files do not have to 354 be rebuild. 355 Generate .hx files and copy it in the Makefiles if they changed. 356kcah 357 358hack Disable fortification for /usr/bin/makeinfo 359cdata 24 Mar 2014 360who tron 361file src/external/gpl2/texinfo/bin/makeinfo/Makefile : 1.1 362pr N/A 363descr 364 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 365 it fails to process certain texinfo files, e.g. "cl.texi" 366 included in the Emacs 24.3 distribution. 367kcah 368 369hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 370cdata 05 Apr 2014 371who tron 372file src/external/mit/xorg/bin/xauth/Makefile : 1.4 373pr N/A 374descr 375 If "xauth" is compile with "USE_SSP" set to "yes" it fails 376 mysteriously with an error message like this: 377 378 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 379 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 380 381 The compiler seems to get confused about the two filename variables 382 used in the link(2) system call. 383kcah 384 385hack g++ 5.x barfs on volatile in constexpr initializers 386cdata 27 Aug 2015 387who pooka 388file src/lib/libpthread/pthread_types.h : 1.17 389pr lib/49989 390descr 391 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 392 in C++ results in: 393 error: temporary of non-literal type '__pthread_mutex_st' 394 in a constant expression 395 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 396 [...] 397 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 398 not literal because: 399 struct __pthread_mutex_st { 400 ^ 401 include/pthread_types.h:103:17: note: non-static data 402 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 403 pthread_spin_t ptm_errorcheck; 404kcah 405 406hack libm cabs{,f,l} and g++ 407cdata 11 Jan 2016 408who christos 409pr lib/50646 410file src/external/gpl3/gcc.old/dist/libstdc++-v3/include/std/complex : 1.2 411file src/external/gpl3/gcc/dist/libstdc++-v3/include/std/complex : 1.2 412descr 413 Our cabs and cabsf have a different argument format on some architectures 414 and for that we have created in libm/compat_cabs{,f}.c. The standard 415 versions in libc are __c99_cabs{,f,l} and there are __RENAME()'s in 416 <complex.h>. G++ uses __builtin_cabs{,f,l} to implement those and they 417 translate by default to cabs{,f,l} which gets defined to cabs{,f} (the 418 wrong function) and an undefined cabsl. I've changed <complex> to use 419 the __c99_cabs{,f,l} directly. Using the __builtin_cabs{,f,l} in gcc is 420 still broken. 421kcah 422 423port vax 424 425 hack gcc4/vax ICE 426 cdate Sat Dec 22 08:17:57 2007 UTC 427 who tsutsui 428 file sys/arch/vax/conf/Makefile.vax : 1.79 429 descr 430 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 431 -fno-tree-ter prevents it so add it to COPTS. 432 kcah 433 434 hack gcc4/vax compiler crash 435 cdate Fri Jun 30 22:39:12 PDT 2006 436 who mrg 437 file bin/csh/Makefile : 1.27 438 file lib/i18n_module/UTF7/Makefile : 1.2 439 descr 440 GCC4 on vax crashes. -O0 stops it happening so far... 441 kcah 442 443 hack declare boolean_t in two IPF user-mode programs 444 cdate Tue Mar 7 19:19:20 CET 2006 445 who he 446 file dist/ipf/ipsend/iptests.c : 1.8 447 dist/ipf/ipsend/sock.c : 1.7 448 descr 449 The IPF user-mode programs ipsend and iptest first 450 include <sys/types.h> without _KERNEL defined, and 451 later include <sys/file.h> with _KERNEL defined. 452 This causes a build failure when building for vax, 453 since <sys/device.h> ends up being included without 454 bollean_t being defined by <sys/types.h>. 455 Build failure and further details documented in 456 PR#32907. 457 kcah 458 459 hack pcc 0.9.9 large string literals 460 cdat 8 July 2008 461 who gmcgarry 462 file sys/conf/param.c : 1.58 463 descr 464 Workaround for pcc 0.9.9 not handling large string literals 465 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 466 fail compilation. 467 There is a proposal on the pcc mailing list to stuff config 468 file in ELF section. 469 kcah 470 471 hack xorg warnings 472 cdat 30 July 2008, 3 June, 2013 473 who mrg 474 file external/mit/xorg/lib/libSM/Makefile : 1.2 475 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 476 external/mit/xorg/lib/libXext/Makefile : 1.2 477 external/mit/xorg/lib/libXfont/Makefile : 1.2 478 descr 479 Disable several warnings or use -Wno-error across Xorg sources 480 while we get them working 481 kcah 482 483 hack 32 bit time leftovers 484 cdat 11 January 2009 485 who christos 486 file lib/libc/time/localtime.c : 1.41 487 lib/libc/time/zic.c : 1.23 488 descr 489 The timezone compiled files still contain 32 bit time_t 490 quantities. I did not want to version the files because 491 the ``parser'' is too ugly for words. What needs to be 492 done, is to rewrite the parser from scratch also to avoid 493 potential core-dumps from parsing invalid files. 494 kcah 495 496 hack 32 bit time leftovers 497 cdat 11 January 2009 498 who christos 499 file various 500 descr 501 Many filesystem on-disk formats have 32 bit times. 502 kcah 503 504 hack gcc 4.5 fsdb miscompile 505 date Sat Nov 9 11:03:02 EST 2013 506 who christos 507 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 508 descr 509 src/sbin/fsdb/fsdb.c: In function 'findblk': 510 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 511 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 512 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 513 (const_int 8 [0x8])) 514 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 515 -1 (nil)) 516 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 517 extract_insn, at recog.c:2103 518 kcah 519 520 hack gcc 4.8 gcc miscompiles 521 date Sat Nov 9 16:35:18 EST 2013 522 who christos 523 file distrib/utils/x_ping/Makefile : 1.8 524 file distrib/vax/miniroot/Makefile.inc : ? 525 file distrib/vax/ramdisk/Makefile : ? 526 file external/gpl3/gdb/lib/libdecnumber/Makefile : 1.3 527 file sbin/fsdb/Makefile : 1.36 528 file sbin/newfs_ext2fs/Makefile : 1.6 529 file sbin/ping/Makefile : 1.17 530 file usr.sbin/mtrace/Makefile : 1.11 531 descr 532 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 533 internal compiler error: in change_address_1, at emit-rtl.c:2019 534 external/gpl3/gcc/dist/gcc/recog.c:770:1: 535 internal compiler error: in change_address_1, at emit-rtl.c:2019 536 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 537 internal compiler error: in change_address_1, at emit-rtl.c:2019 538 sbin/ping/ping.c:679:1: 539 internal compiler error: in change_address_1, at emit-rtl.c:2019 540 sbin/newfs_ext2fs/mke2fs.c:681:1: 541 internal compiler error: in reload_combine_note_use, 542 at postreload.c:1561 543 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 544 internal compiler error: in change_address_1, at emit-rtl.c:2019 545 usr.sbin/mtrace/mtrace.c:1655:1: 546 internal compiler error: in change_address_1, at emit-rtl.c:2019 547 kcah 548 549 hack gcc 5.4 cc1 miscompile 550 date Tue Feb 14 07:19:57 JST 2017 551 who rin 552 pr port-vax/51967 553 file external/gpl3/gcc/usr.bin/backend/Makefile : 1.35 554 descr 555 cc1 aborts due to SIGILL when compiling the sample code attached 556 to the PR. As a workaround, compile dse.c with -O0. 557 kcah 558 559 hack libssh miscompile 560 cdate Tue Feb 14 17:58:06 JST 2017 561 mdate Tue Feb 14 18:57:39 JST 2017 562 who rin 563 file crypto/external/bsd/openssh/lib/Makefile : 1.20 564 descr 565 poly1305.c and umac.c are miscompiled, which results in login 566 failure to/from external hosts via ssh. 567 kcah 568 569 hack mandoc miscompile 570 date Tue Feb 14 18:03:05 JST 2017 571 who rin 572 file external/bsd/mdocml/lib/libmandoc/Makefile : 1.8 573 descr 574 mandoc(1) receives SIGILL in in_line_argn() from mdoc_macro.c. 575 kcah 576 577 hack libX11 miscompile 578 date Thu Feb 16 10:00:22 JST 2017 579 who rin 580 file src/external/mit/xorg/lib/libX11/Makefile.libx11 : 1.18 581 descr 582 lcWrap.c is miscompiled, which results in input failure via XIM. 583 Besides, some clients, e.g., pkgsrc/x11/kterm, receive SIGSEGV. 584 kcah 585 586 hack gomoku compiler crash 587 date Tue May 31 15:11:39 EDT 2022 588 who christos 589 file src/games/gomoku/Makefile : 1.12 590 descr 591 pickmove.c crashes with -O2, warns about ovi.o_intersect being 592 unitialized with -O1, works with -O0 593 kcah 594 595 hack gdtoa/misc.c miscompile 596 cdate Sun Dec 4 22:27:26 UTC 2022 597 who jakllsch 598 file src/lib/libc/gdtoa/Makefile.inc : 1.11 599 descr 600 some doubles print as garbage if gdtoa/misc.c isn't compiled at -O0 601 kcah 602 603port arm 604 605 hack gcc-unsigned-compare 606 cdate 09 Mar 2002 607 mdate 18 Mar 2002 608 who bjh21 609 file dist/bind/lib/nameser/ns_parse.c : 1.3 610 file dist/dhcp/minires/ns_parse.c : 1.3 611 file dist/dhcp/omapip/result.c : 1.2 612 file dist/dhcp/server/failover.c : 1.3 613 file gnu/dist/toolchain/bfd/bfd.c : 1.2 614 file gnu/dist/toolchain/bfd/format.c : 1.2 615 file gnu/dist/toolchain/gdb/target.c : 1.2 616 file sys/kern/vfs_subr.c : 1.172 617 descr When checking that a potentially-unsigned enum is >= 0, assign 618 it to an int first. This is necessary to avoid "comparison is 619 always true" warnings with -fshort-enums. Casting to an int 620 really should be enough, but turns out not to be. 621 kcah 622 623 hack gcc-4.5 arm CNAME hostname lookup failure on 624 certain DNS environment (probably -ftree-ter problem) 625 cdate Sat Dec 24 04:59:00 UTC 2011 626 mdate 627 who tsutsui 628 file lib/libc/net/Makefile.inc 1.79 629 descr Hostname lookup against CNAMEs by some commands fails 630 on certain DNS environments if lib/libc/net/gethnamaddr.c 631 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 632 are compiled with -O2, even though nslookup(1) against 633 the same CNAME returns proper hostname. 634 They works properly if compiled with -O2 -fno-tree-ter. 635 Also -O2 fails but -O2 -fno-tree-ter works on the following 636 test case in gcc bugzilla: 637 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 638 kcah 639 640port sh3 641 642 hack gcc4-sh3-bz2 643 cdate Sun May 21 03:34:57 UTC 2006 644 mdate Fri May 16 13:13:00 UTC 2008 645 who mrg, tsutsui 646 file lib/libbz2/Makefile : 1.10 647 descr 648 The in-tree GCC 4.1-based compiler generated too-far 649 pc-relative addresses. Hack is to build with 650 -fno-loop-optimize. 651 kcah 652 653port m68000 654 655 hack gcc4-m68000 656 cdate Fri Feb 8 10:29:37 PST 2008 657 mdate Sun May 4 15:37:19 UTC 2008 658 who mrg, tsutsui 659 file rescue/Makefile : 1.21 660 file sbin/dump_lfs/Makefile : 1.9 661 file sbin/fsck_ffs/Makefile : 1.35 662 file sbin/fsdb/Makefile : 1.22 663 file share/mk/sys.mk : 1.96 664 file usr.sbin/ndbootd/Makefile : 1.5 665 descr 666 Several internal compiler errors with gcc -O1 667 around 64bit integer arithmetic. 668 This hack uses -O1 and adds some -fno-tree-foo options 669 to avoid the problem. 670 This might be related with GCC Bugzilla Bug 32424. 671 kcah 672 673port m68k,sh3,vax 674 675 hack gcc-4.8.1 676 cdate Wed Nov 6 20:41:35 EST 2013 677 who christos 678 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 679 descr 680 compile hashtable_c++0x.cc with -O2 instead of -Os to 681 produce missing instantiation of std::lower_bound expansion 682 for unsigned long. 683 kcah 684 685port sparc 686 687 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 688 cdate Sun Aug 14 19:26:48 PDT 2011 689 who mrg 690 file sys/arch/sparc64/sparc/cpu.c : 1.234 691 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 692 file sys/arch/sparc64/sparc/genassym.cf : 1.67 693 file sys/arch/sparc64/sparc/locore.s : 1.265 694 descr 695 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 696 Post newlock2 there was a bug where a lock was reduced from 697 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 698 would crash due to NULL IPI. This was fixed by re-using the 699 right IPL value. However, GCC 4.5.3 build kernels have the 700 same problems. For now, the hack is re-instated. 701 kcah 702 703 704port mips 705 706 hack mips-shared-linker-load-address 707 cdate Fri Oct 7 08:33:10 UTC 2005 708 who simonb 709 file src/sys/kern/exec_elf32.c : 1.107 710 descr 711 With COMPAT_16 or previous enabled (which enables 712 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 713 load and run at address 0. The check to fix this in 714 rev 1.107 only checks the first psection of the ELF 715 executable, which may not be loadable. A more correct 716 fix is to check the first loadable psection instead of 717 just the first psection. 718 kcah 719 720 hack mips-duplicate-ras-end-label 721 cdate Sat Sep 2 23:29:42 2006 722 who martin 723 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 724 descr 725 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 726 labels by duplicated __asm output from RAS_END() 727 macro. 728 kcah 729 730 hack mips-mcount-assembler-warning 731 cdate Tue Jul 29 14:16:52 UTC 2008 732 who lukem 733 file src/lib/libc/gmon/Makefile.inc : 1.8 734 descr 735 Workaround for PR port-mips/39192. 736 common/lib/libc/gmon/mcount.c generates a (fatal) 737 assembler warning on MIPS: 738 Warning: No .cprestore pseudo-op used in PIC code 739 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 740 kcah 741 742port i386 743 744 hack use volatile intermediate variable to enforce rounding 745 cdate Tue Aug 1 22:15:55 MEST 2006 746 who drochner 747 file src/lib/libm/src/lrintf.c : 1.4 748 file src/lib/libm/src/s_rintf.c : 1.8 749 descr 750 gcc-4 does subsequent operations on "float" values within 751 the i387 FPU without rounding the intermediate results 752 kcah 753 754port x86 755 hack turn off optimization for biosdisk_ll.c because otherwise 756 we are pass the wrong arguments to biosdisk_read(). 757 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 758 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 759 cdate Mon Apr 7 21:09:55 2014 UTC 760 who christos 761 file src/sys/arch/i386/stand/lib/Makefile : 1.38 762 descr 763 Turning on DISK_DEBUG shows the problem. We should find 764 out which option is causing this. 765 hcah 766 767port powerpc 768 769 hack avoid using __builtin_return_address(0) because it fails in 770 Xorg's module loader 771 cdate Sat Sep 27 03:52:05 UTC 2008 772 who macallan 773 file src/libexec/ld.elf_so/rtld.c : 1.121 774 descr 775 workaround for PR port-macppc/37812 776 kcah 777 778 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 779 building the native compiler via build.sh those don't defined 780 properly. 781 cdate Sat Mar 12 08:00:00 UTC 2011 782 who matt 783 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h : 1.7 784 descr 785 see above 786 kcah 787 788port powerpc64 789 790 hack include _errno.c in libposix so that __errno resolves. It 791 should resolve from libc's errno, but somehow it does not. 792 Linker bug? 793 cdate Thu Oct 27 13:19:47 EDT 2011 794 who christos 795 file src/lib/libposix/Makefile: 1.15 796 file src/lib/librt/Makefile: 1.14 797 descr 798 workaround for: 799 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 800 R_PPC64_REL24 relocation against symbol `.__errno' 801 kcah 802 803 hack rename data() function in mdocml to avoid redefined error. 804 Compiler/Assembler bug? 805 cdate Sat Oct 29 11:16:01 EDT 2011 806 who christos 807 file src/external/bsd/mdocml/tbl_data.c: 1.2 808 descr 809 workaround for: 810 {standard input}: Assembler messages: 811 {standard input}:105: Error: symbol `.data' is already \ 812 defined 813 kcah 814 815port emips 816 817 hack Add nop between ctc1 and mtc0 to avoid assembler internal 818 error 819 cdate Sat Oct 29 16:57:34 EDT 2011 820 who christos 821 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 822 descr 823 workaround for: 824 {standard input}: Assembler messages: 825 {standard input}:730: Internal error! 826 Assertion failure in append_insn at /usr/src/external/gpl3/\ 827 binutils/dist/gas/config/tc-mips.c line 2910. 828 kcah 829 830port ia64 831 832 hack libgcc unwind dummy function 833 cdate Fri Apr 17 14:31:03 CEST 2015 834 who martin 835 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 836 descr 837 Add an empty _Unwind_FindTableEntry() implementation. 838 In the end we will use our libc stuff, and this should 839 go away again. 840 kcah 841 842port x68k 843 844 hack compiler error with gcc 4.5.x 845 cdate Fri May 24 13:23:01 EDT 2013 846 who christos 847 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 848 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 849 descr 850 workaround for: 851 internal compiler error: in cselib_record_set, at cselib.c:1999 852 kcah 853 854hack fallback to /usr/bin/clang-cpp in rpcgen 855cdate Wed Jun 5 15:49:27 CEST 2013 856who joerg 857file src/usr.bin/rpcgen/rpc_main.c : 1.35 858descr 859 It is undecided which compiler owns /usr/bin/cpp and whether it should 860 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 861 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 862 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 863kcah 864 865port hppa 866 867 hack compiler error with gcc 4.5.x 868 cdate Tue Jul 23 07:42:28 BST 2013 869 who skrll 870 file src/sys/lib/libkern/Makefile.libkern: 1.26 871 descr 872 workaround for unanalysed codegen bug affecting md5c.c. 873 kcah 874 875 hack gdb vs _rtld_debug_state problem 876 cdate Thu Mar 5 09:49:53 UTC 2015 877 who skrll 878 file src/libexec/ld.elf_so/rtld.c: 1.175 879 descr 880 workaround for problem where gdb misses the breakpoint on 881 _rtld_debug_state when the function is only the 882 bv,n %r0(%rp) instruction - the nullify seems to 883 confuse something 884 kcah 885 886port mips64* 887hack compiler crashes on mips64* with optimization enabled 888cdate Tue May 13 18:46:48 UTC 2014 889who macallan 890file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 891 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 892 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 893 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 894descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 895pr 48696 896kcah 897 898port vax 899hack compile boot with -O1 900cdate Sat May 24 09:40:58 CEST 2014 901who martin 902file src/sys/arch/vax/boot/boot/Makefile: 1.41 903descr /boot does not work when compiled with -O2 and gcc 4.8 904kcah 905 906port vax 907hack compile nir.c in gallium with -O1 908cdate Mon Oct 28 14:39:35 EDT 2019 909who christos 910file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 911descr gallium does not compile. 912kcah 913 914port sh3 915hack compile parse.c in battlestar with -Wno-restrict 916cdate Mon Oct 28 14:39:35 EDT 2019 917who christos 918file /cvsroot/src/games/battlestar/Makefile 1.11 919descr fails to compile, confused by char words[][]; 920 strcpy(words[n - 1], words[n + 1]); 921kcah 922 923port sh3 924hack compile ddns.c in dhcpcd with no-stringop-overflow 925cdate Tue Oct 29 20:25:59 EDT 2019 926who christos 927file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 928descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 929kcah 930 931port arm 932hack avoid using labels in a 12-bit constant. 933cdate Mon Mar 30 05:26:47 2015 UTC 934who matt 935file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 936descr workaround for clang misassembling an instruction 937kcah 938 939port sparc64 940hack during profiling with -m32 (and ASLR) labels are not generated 941 consistently 942cdate Sat Feb 11 04:56:37 2017 UTC 943who christos 944file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 945desc asn1_krb5_asn1.po does not produce the same results during successive 946 compilation runs; it is bimodal. Turning optimization to -O0 fixes 947 the issue 948kcah 949 950port ia64 951hack ski emulator crashes 952cdate Sat Apr 8 18:10:43 2017 UTC 953who scole 954file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 955desc 956 ski emulator crashes during acpi detection. Added a check for 957 uninitialized index. Submitted a request for change with upstream 958 mailing list, but never got a response 959kcah 960 961port vax 962hack compile rtld.c with -O0 963cdate Wed Apr 3 17:38:38 EDT 2019 964who christos 965file src/libexec/ld.elf_so/Makefile: 1.141 966descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 967 second pass loop with elm == 0xffffffff 968kcah 969 970port powerpc 971hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 972cdate Wed Jan 29 17:40:19 EST 2020 973who christos 974file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 975file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 976file src/tests/lib/libc/misc/Makefile: 1.5 977 978descr Disable optimization on tc.c, logerr.c, ubsan.c crashes: 979 lib/libLLVMCodeGen/../../llvm/../../external/apache2/llvm/lib/..\ 980 /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \ 981 function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const" 982kcah 983 984port m68k 985hack compile aes_ccm_tag() with -O0 986cdate Mon Aug 10 06:27:29 UTC 2020 987mdate Wed Aug 10 00:00:00 UTC 2022 988who rin 989file src/sys/crypto/aes/aes_ccm.c: 1.5 990descr GCC 9.4 and 8.3 miscompile aes_ccm_tag() for m68k with optimization 991 level -O[12], which results in failure in aes_ccm_selftest(). 992 For 9.4, -O0 and -O1 work but -O2 fails for amiga (A1200, 68060) and 993 mac68k (Quadra 840AV, 68040). Whereas -O0 and -O2 work but -O1 fails 994 for sun3 (TME, 68020 emulator) and sun2 (TME, 68010 emulator). 995 aes_ccm_selftest() still fails with GCC 10.4 and -O2. 996kcah 997 998port sh3 999 1000 hack gcc9-sh3-lint 1001 cdate Tue Jun 22 14:59:52 CEST 2021 1002 mdate Mon Jul 5 12:34:57 CEST 2021 1003 who hgutch 1004 file external/gpl3/gcc/dist/gcc/config/sh/sh.md 1.2 1005 external/gpl3/gcc.old/dist/gcc/config/sh/sh.md 1.11 1006 descr 1007 The in-tree gcc 9/gcc 10 crashes with an internal 1008 invalid opcode exception when using any kind of 1009 optimization on lex.c in usr.bin/xlint/lint . This 1010 was introduced apparently unintendedly in gcc when 1011 addressing a different issue. Rather than disabling 1012 optimization for lex.c, instead revert the change to 1013 gcc. The bug report upstream has been updated to 1014 reflect the exact breakage. 1015 1016 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101177 1017kcah 1018 1019port sh3 1020hack compile lint1/initdecl() with -O0 for sh3 (port-sh3/56311) 1021cdate Thu Jul 15 07:58:05 UTC 2021 1022mdate Fri Jul 16 10:00:00 UTC 2021 1023who rin 1024file src/usr.bin/xlint/lint1/decl.c: 1.200 1025descr GCC 9 and 10 miscompile initdecl() due to mischoice of register, 1026 as described in the PR. Compiling this function with -O0 works 1027 around the problem. 1028 The problem has been reported to upstream as GCC Bug 101469: 1029 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101469 1030kcah 1031 1032port vax 1033hack compile blake2b.c with -O0 for vax 1034cdate Wed Oct 13 14:28:32 UTC 2021 1035mdate Wed Oct 13 14:28:32 UTC 2021 1036who nia 1037file src/lib/libcrypt/Makefile: 1.200 1038descr GCC 10 fails to build blake2b.c with an internal compiler 1039 error unless optimization is disabled. 1040kcah 1041 1042port arm 1043hack compile t_sig_backtrace with -fno-omit-frame-pointer for arm 1044cdate Tue Nov 23 23:24:37 UTC 2021 1045mdate Tue Nov 23 23:24:37 UTC 2021 1046who thorpej 1047file src/tests/lib/libexecinfo/Makefile: 1.8 1048file src/tests/lib/libexecinfo/t_sig_backtrace: 1.2 1049descr Unit test fails to pass unless t_sig_backtrace.c is compiled 1050 with -fno-omit-frame-pointer and -DNOINLINE_HACK. 1051kcah 1052 1053hack alpha gcc error in lint 1054cdate 2022/04/10 13:21:34 1055who martin 1056port alpha 1057file usr.bin/xlint/Makefile.inc: 1.23 1058pr 56789 1059descr 1060 Compiling lint with -ftrapv fails with an internal 1061 gcc compiler error. 1062 1063 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105209 1064kcah 1065 1066hack compile copy{in,out}() for ibm4xx with -O0 for clang 1067cdate Mon Sep 12 08:06:36 UTC 2022 1068who rin 1069port evbppc 1070file sys/arch/powerpc/ibm4xx/trap.c: 1.99 1071descr 1072 clang 13.0.0 miscompiles copy{in,out}() with -O[12]. As a result, 1073 kernel cannot execute /sbin/init. 1074kcah 1075