HACKS revision 1.218
1# $NetBSD: HACKS,v 1.218 2021/05/31 22:33:19 rin 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 586port arm 587 588 hack gcc-unsigned-compare 589 cdate 09 Mar 2002 590 mdate 18 Mar 2002 591 who bjh21 592 file dist/bind/lib/nameser/ns_parse.c : 1.3 593 file dist/dhcp/minires/ns_parse.c : 1.3 594 file dist/dhcp/omapip/result.c : 1.2 595 file dist/dhcp/server/failover.c : 1.3 596 file gnu/dist/toolchain/bfd/bfd.c : 1.2 597 file gnu/dist/toolchain/bfd/format.c : 1.2 598 file gnu/dist/toolchain/gdb/target.c : 1.2 599 file sys/kern/vfs_subr.c : 1.172 600 descr When checking that a potentially-unsigned enum is >= 0, assign 601 it to an int first. This is necessary to avoid "comparison is 602 always true" warnings with -fshort-enums. Casting to an int 603 really should be enough, but turns out not to be. 604 kcah 605 606 hack gcc-4.5 arm CNAME hostname lookup failure on 607 certain DNS environment (probably -ftree-ter problem) 608 cdate Sat Dec 24 04:59:00 UTC 2011 609 mdate 610 who tsutsui 611 file lib/libc/net/Makefile.inc 1.79 612 descr Hostname lookup against CNAMEs by some commands fails 613 on certain DNS environments if lib/libc/net/gethnamaddr.c 614 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 615 are compiled with -O2, even though nslookup(1) against 616 the same CNAME returns proper hostname. 617 They works properly if compiled with -O2 -fno-tree-ter. 618 Also -O2 fails but -O2 -fno-tree-ter works on the following 619 test case in gcc bugzilla: 620 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 621 kcah 622 623port sh3 624 625 hack gcc4-sh3-bz2 626 cdate Sun May 21 03:34:57 UTC 2006 627 mdate Fri May 16 13:13:00 UTC 2008 628 who mrg, tsutsui 629 file lib/libbz2/Makefile : 1.10 630 descr 631 The in-tree GCC 4.1-based compiler generated too-far 632 pc-relative addresses. Hack is to build with 633 -fno-loop-optimize. 634 kcah 635 636port m68000 637 638 hack gcc4-m68000 639 cdate Fri Feb 8 10:29:37 PST 2008 640 mdate Sun May 4 15:37:19 UTC 2008 641 who mrg, tsutsui 642 file rescue/Makefile : 1.21 643 file sbin/dump_lfs/Makefile : 1.9 644 file sbin/fsck_ffs/Makefile : 1.35 645 file sbin/fsdb/Makefile : 1.22 646 file share/mk/sys.mk : 1.96 647 file usr.sbin/ndbootd/Makefile : 1.5 648 descr 649 Several internal compiler errors with gcc -O1 650 around 64bit integer arithmetic. 651 This hack uses -O1 and adds some -fno-tree-foo options 652 to avoid the problem. 653 This might be related with GCC Bugzilla Bug 32424. 654 kcah 655 656port m68k,sh3,vax 657 658 hack gcc-4.8.1 659 cdate Wed Nov 6 20:41:35 EST 2013 660 who christos 661 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 662 descr 663 compile hashtable_c++0x.cc with -O2 instead of -Os to 664 produce missing instantiation of std::lower_bound expansion 665 for unsigned long. 666 kcah 667 668port sparc 669 670 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 671 cdate Sun Aug 14 19:26:48 PDT 2011 672 who mrg 673 file sys/arch/sparc64/sparc/cpu.c : 1.234 674 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 675 file sys/arch/sparc64/sparc/genassym.cf : 1.67 676 file sys/arch/sparc64/sparc/locore.s : 1.265 677 descr 678 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 679 Post newlock2 there was a bug where a lock was reduced from 680 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 681 would crash due to NULL IPI. This was fixed by re-using the 682 right IPL value. However, GCC 4.5.3 build kernels have the 683 same problems. For now, the hack is re-instated. 684 kcah 685 686 687port mips 688 689 hack mips-shared-linker-load-address 690 cdate Fri Oct 7 08:33:10 UTC 2005 691 who simonb 692 file src/sys/kern/exec_elf32.c : 1.107 693 descr 694 With COMPAT_16 or previous enabled (which enables 695 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 696 load and run at address 0. The check to fix this in 697 rev 1.107 only checks the first psection of the ELF 698 executable, which may not be loadable. A more correct 699 fix is to check the first loadable psection instead of 700 just the first psection. 701 kcah 702 703 hack mips-duplicate-ras-end-label 704 cdate Sat Sep 2 23:29:42 2006 705 who martin 706 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 707 descr 708 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 709 labels by duplicated __asm output from RAS_END() 710 macro. 711 kcah 712 713 hack mips-mcount-assembler-warning 714 cdate Tue Jul 29 14:16:52 UTC 2008 715 who lukem 716 file src/lib/libc/gmon/Makefile.inc : 1.8 717 descr 718 Workaround for PR port-mips/39192. 719 common/lib/libc/gmon/mcount.c generates a (fatal) 720 assembler warning on MIPS: 721 Warning: No .cprestore pseudo-op used in PIC code 722 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 723 kcah 724 725port i386 726 727 hack use volatile intermediate variable to enforce rounding 728 cdate Tue Aug 1 22:15:55 MEST 2006 729 who drochner 730 file src/lib/libm/src/lrintf.c : 1.4 731 file src/lib/libm/src/s_rintf.c : 1.8 732 descr 733 gcc-4 does subsequent operations on "float" values within 734 the i387 FPU without rounding the intermediate results 735 kcah 736 737port x86 738 hack turn off optimization for biosdisk_ll.c because otherwise 739 we are pass the wrong arguments to biosdisk_read(). 740 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 741 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 742 cdate Mon Apr 7 21:09:55 2014 UTC 743 who christos 744 file src/sys/arch/i386/stand/lib/Makefile : 1.38 745 descr 746 Turning on DISK_DEBUG shows the problem. We should find 747 out which option is causing this. 748 hcah 749 750port powerpc 751 752 hack avoid using __builtin_return_address(0) because it fails in 753 Xorg's module loader 754 cdate Sat Sep 27 03:52:05 UTC 2008 755 who macallan 756 file src/libexec/ld.elf_so/rtld.c : 1.121 757 descr 758 workaround for PR port-macppc/37812 759 kcah 760 761 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 762 building the native compiler via build.sh those don't defined 763 properly. 764 cdate Sat Mar 12 08:00:00 UTC 2011 765 who matt 766 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h : 1.7 767 descr 768 see above 769 kcah 770 771port powerpc64 772 773 hack include _errno.c in libposix so that __errno resolves. It 774 should resolve from libc's errno, but somehow it does not. 775 Linker bug? 776 cdate Thu Oct 27 13:19:47 EDT 2011 777 who christos 778 file src/lib/libposix/Makefile: 1.15 779 file src/lib/librt/Makefile: 1.14 780 descr 781 workaround for: 782 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 783 R_PPC64_REL24 relocation against symbol `.__errno' 784 kcah 785 786 hack rename data() function in mdocml to avoid redefined error. 787 Compiler/Assembler bug? 788 cdate Sat Oct 29 11:16:01 EDT 2011 789 who christos 790 file src/external/bsd/mdocml/tbl_data.c: 1.2 791 descr 792 workaround for: 793 {standard input}: Assembler messages: 794 {standard input}:105: Error: symbol `.data' is already \ 795 defined 796 kcah 797 798port emips 799 800 hack Add nop between ctc1 and mtc0 to avoid assembler internal 801 error 802 cdate Sat Oct 29 16:57:34 EDT 2011 803 who christos 804 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 805 descr 806 workaround for: 807 {standard input}: Assembler messages: 808 {standard input}:730: Internal error! 809 Assertion failure in append_insn at /usr/src/external/gpl3/\ 810 binutils/dist/gas/config/tc-mips.c line 2910. 811 kcah 812 813port ia64 814 815 hack libgcc unwind dummy function 816 cdate Fri Apr 17 14:31:03 CEST 2015 817 who martin 818 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 819 descr 820 Add an empty _Unwind_FindTableEntry() implementation. 821 In the end we will use our libc stuff, and this should 822 go away again. 823 kcah 824 825port x68k 826 827 hack compiler error with gcc 4.5.x 828 cdate Fri May 24 13:23:01 EDT 2013 829 who christos 830 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 831 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 832 descr 833 workaround for: 834 internal compiler error: in cselib_record_set, at cselib.c:1999 835 kcah 836 837hack fallback to /usr/bin/clang-cpp in rpcgen 838cdate Wed Jun 5 15:49:27 CEST 2013 839who joerg 840file src/usr.bin/rpcgen/rpc_main.c : 1.35 841descr 842 It is undecided which compiler owns /usr/bin/cpp and whether it should 843 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 844 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 845 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 846kcah 847 848port hppa 849 850 hack compiler error with gcc 4.5.x 851 cdate Tue Jul 23 07:42:28 BST 2013 852 who skrll 853 file src/sys/lib/libkern/Makefile.libkern: 1.26 854 descr 855 workaround for unanalysed codegen bug affecting md5c.c. 856 kcah 857 858 hack gdb vs _rtld_debug_state problem 859 cdate Thu Mar 5 09:49:53 UTC 2015 860 who skrll 861 file src/libexec/ld.elf_so/rtld.c: 1.175 862 descr 863 workaround for problem where gdb misses the breakpoint on 864 _rtld_debug_state when the function is only the 865 bv,n %r0(%rp) instruction - the nullify seems to 866 confuse something 867 kcah 868 869port mips64* 870hack compiler crashes on mips64* with optimization enabled 871cdate Tue May 13 18:46:48 UTC 2014 872who macallan 873file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 874 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 875 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 876 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 877descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 878pr 48696 879kcah 880 881port vax 882hack compile boot with -O1 883cdate Sat May 24 09:40:58 CEST 2014 884who martin 885file src/sys/arch/vax/boot/boot/Makefile: 1.41 886descr /boot does not work when compiled with -O2 and gcc 4.8 887kcah 888 889port vax 890hack compile nir.c in gallium with -O1 891cdate Mon Oct 28 14:39:35 EDT 2019 892who christos 893file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 894descr gallium does not compile. 895kcah 896 897port sh3 898hack compile parse.c in battlestar with -Wno-restrict 899cdate Mon Oct 28 14:39:35 EDT 2019 900who christos 901file /cvsroot/src/games/battlestar/Makefile 1.11 902descr fails to compile, confused by char words[][]; 903 strcpy(words[n - 1], words[n + 1]); 904kcah 905 906port sh3 907hack compile ddns.c in dhcpcd with no-stringop-overflow 908cdate Tue Oct 29 20:25:59 EDT 2019 909who christos 910file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 911descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 912kcah 913 914port arm 915hack avoid using labels in a 12-bit constant. 916cdate Mon Mar 30 05:26:47 2015 UTC 917who matt 918file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 919descr workaround for clang misassembling an instruction 920kcah 921 922port sparc64 923hack during profiling with -m32 (and ASLR) labels are not generated 924 consistently 925cdate Sat Feb 11 04:56:37 2017 UTC 926who christos 927file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 928desc asn1_krb5_asn1.po does not produce the same results during successive 929 compilation runs; it is bimodal. Turning optimization to -O0 fixes 930 the issue 931kcah 932 933port ia64 934hack ski emulator crashes 935cdate Sat Apr 8 18:10:43 2017 UTC 936who scole 937file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 938desc 939 ski emulator crashes during acpi detection. Added a check for 940 uninitialized index. Submitted a request for change with upstream 941 mailing list, but never got a response 942kcah 943 944port vax 945hack compile rtld.c with -O0 946cdate Wed Apr 3 17:38:38 EDT 2019 947who christos 948file src/libexec/ld.elf_so/Makefile: 1.141 949descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 950 second pass loop with elm == 0xffffffff 951kcah 952 953port alpha 954hack GCC 7.4/8.3/9.3: userland binaries crash randomly (port-alpha/54307) 955cdate Fri Nov 1 20:43:35 UTC 2019 956mdate Wed Dec 16 01:21:32 UTC 2020 957who rin 958file src/external/bsd/jemalloc/lib/Makefile.inc: 1.11 959descr GCC miscompiles rtree.c and tcache.c (for 7.4, 8.3, and 9.3) with 960 optimization levels -O[12]. Compile these files with -O0, 961 alternatively, compile whole jemalloc with -DJEMALLOC_DEBUG. 962kcah 963 964port powerpc 965hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 966cdate Wed Jan 29 17:40:19 EST 2020 967who christos 968file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 969file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 970file src/tests/lib/libc/misc/Makefile: 1.5 971 972descr Disable optimization on tc.c, logerr.c, ubsan.c crashes: 973 lib/libLLVMCodeGen/../../llvm/../../external/apache2/llvm/lib/..\ 974 /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \ 975 function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const" 976kcah 977 978port m68k 979hack compile aes_ccm_tag() with -O0 for GCC8 and GCC9 980cdate Mon Aug 10 06:27:29 UTC 2020 981mdate Mon Oct 5 22:00:00 JST 2020 982who rin 983file src/sys/crypto/aes/aes_ccm.c: 1.5 984descr GCC 9.4 and 8.3 miscompile aes_ccm_tag() for m68k with optimization 985 level -O[12], which results in failure in aes_ccm_selftest(). 986 For 9.4, -O0 and -O1 work but -O2 fails for amiga (A1200, 68060) and 987 mac68k (Quadra 840AV, 68040). Whereas -O0 and -O2 work but -O1 fails 988 for sun3 (TME, 68020 emulator) and sun2 (TME, 68010 emulator). 989kcah 990 991port alpha 992hack compile __realpath in gdb/gnulib/canonicalize-lgpl.c with -O0 (PR/56153) 993cdate Sat May 8 08:24:49 EDT 2021 994mdate Sat May 8 08:24:49 EDT 2021 995who christos 996file src/external/gpl3/gdb/dist/gnulib/import/canonicalize-lgpl.c: 1.2 997descr For alpha gcc-9 and gcc-10 miscompile the malloca macro leading to 998 allocation from the stack and freeing with regular free which causes 999 a crash. 1000kcah 1001