HACKS revision 1.230
1# $NetBSD: HACKS,v 1.230 2022/08/10 13:38:26 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 585 586 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 595port arm 596 597 hack gcc-unsigned-compare 598 cdate 09 Mar 2002 599 mdate 18 Mar 2002 600 who bjh21 601 file dist/bind/lib/nameser/ns_parse.c : 1.3 602 file dist/dhcp/minires/ns_parse.c : 1.3 603 file dist/dhcp/omapip/result.c : 1.2 604 file dist/dhcp/server/failover.c : 1.3 605 file gnu/dist/toolchain/bfd/bfd.c : 1.2 606 file gnu/dist/toolchain/bfd/format.c : 1.2 607 file gnu/dist/toolchain/gdb/target.c : 1.2 608 file sys/kern/vfs_subr.c : 1.172 609 descr When checking that a potentially-unsigned enum is >= 0, assign 610 it to an int first. This is necessary to avoid "comparison is 611 always true" warnings with -fshort-enums. Casting to an int 612 really should be enough, but turns out not to be. 613 kcah 614 615 hack gcc-4.5 arm CNAME hostname lookup failure on 616 certain DNS environment (probably -ftree-ter problem) 617 cdate Sat Dec 24 04:59:00 UTC 2011 618 mdate 619 who tsutsui 620 file lib/libc/net/Makefile.inc 1.79 621 descr Hostname lookup against CNAMEs by some commands fails 622 on certain DNS environments if lib/libc/net/gethnamaddr.c 623 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 624 are compiled with -O2, even though nslookup(1) against 625 the same CNAME returns proper hostname. 626 They works properly if compiled with -O2 -fno-tree-ter. 627 Also -O2 fails but -O2 -fno-tree-ter works on the following 628 test case in gcc bugzilla: 629 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 630 kcah 631 632port sh3 633 634 hack gcc4-sh3-bz2 635 cdate Sun May 21 03:34:57 UTC 2006 636 mdate Fri May 16 13:13:00 UTC 2008 637 who mrg, tsutsui 638 file lib/libbz2/Makefile : 1.10 639 descr 640 The in-tree GCC 4.1-based compiler generated too-far 641 pc-relative addresses. Hack is to build with 642 -fno-loop-optimize. 643 kcah 644 645port m68000 646 647 hack gcc4-m68000 648 cdate Fri Feb 8 10:29:37 PST 2008 649 mdate Sun May 4 15:37:19 UTC 2008 650 who mrg, tsutsui 651 file rescue/Makefile : 1.21 652 file sbin/dump_lfs/Makefile : 1.9 653 file sbin/fsck_ffs/Makefile : 1.35 654 file sbin/fsdb/Makefile : 1.22 655 file share/mk/sys.mk : 1.96 656 file usr.sbin/ndbootd/Makefile : 1.5 657 descr 658 Several internal compiler errors with gcc -O1 659 around 64bit integer arithmetic. 660 This hack uses -O1 and adds some -fno-tree-foo options 661 to avoid the problem. 662 This might be related with GCC Bugzilla Bug 32424. 663 kcah 664 665port m68k,sh3,vax 666 667 hack gcc-4.8.1 668 cdate Wed Nov 6 20:41:35 EST 2013 669 who christos 670 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 671 descr 672 compile hashtable_c++0x.cc with -O2 instead of -Os to 673 produce missing instantiation of std::lower_bound expansion 674 for unsigned long. 675 kcah 676 677port sparc 678 679 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 680 cdate Sun Aug 14 19:26:48 PDT 2011 681 who mrg 682 file sys/arch/sparc64/sparc/cpu.c : 1.234 683 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 684 file sys/arch/sparc64/sparc/genassym.cf : 1.67 685 file sys/arch/sparc64/sparc/locore.s : 1.265 686 descr 687 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 688 Post newlock2 there was a bug where a lock was reduced from 689 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 690 would crash due to NULL IPI. This was fixed by re-using the 691 right IPL value. However, GCC 4.5.3 build kernels have the 692 same problems. For now, the hack is re-instated. 693 kcah 694 695 696port mips 697 698 hack mips-shared-linker-load-address 699 cdate Fri Oct 7 08:33:10 UTC 2005 700 who simonb 701 file src/sys/kern/exec_elf32.c : 1.107 702 descr 703 With COMPAT_16 or previous enabled (which enables 704 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 705 load and run at address 0. The check to fix this in 706 rev 1.107 only checks the first psection of the ELF 707 executable, which may not be loadable. A more correct 708 fix is to check the first loadable psection instead of 709 just the first psection. 710 kcah 711 712 hack mips-duplicate-ras-end-label 713 cdate Sat Sep 2 23:29:42 2006 714 who martin 715 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 716 descr 717 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 718 labels by duplicated __asm output from RAS_END() 719 macro. 720 kcah 721 722 hack mips-mcount-assembler-warning 723 cdate Tue Jul 29 14:16:52 UTC 2008 724 who lukem 725 file src/lib/libc/gmon/Makefile.inc : 1.8 726 descr 727 Workaround for PR port-mips/39192. 728 common/lib/libc/gmon/mcount.c generates a (fatal) 729 assembler warning on MIPS: 730 Warning: No .cprestore pseudo-op used in PIC code 731 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 732 kcah 733 734port i386 735 736 hack use volatile intermediate variable to enforce rounding 737 cdate Tue Aug 1 22:15:55 MEST 2006 738 who drochner 739 file src/lib/libm/src/lrintf.c : 1.4 740 file src/lib/libm/src/s_rintf.c : 1.8 741 descr 742 gcc-4 does subsequent operations on "float" values within 743 the i387 FPU without rounding the intermediate results 744 kcah 745 746port x86 747 hack turn off optimization for biosdisk_ll.c because otherwise 748 we are pass the wrong arguments to biosdisk_read(). 749 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 750 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 751 cdate Mon Apr 7 21:09:55 2014 UTC 752 who christos 753 file src/sys/arch/i386/stand/lib/Makefile : 1.38 754 descr 755 Turning on DISK_DEBUG shows the problem. We should find 756 out which option is causing this. 757 hcah 758 759port powerpc 760 761 hack avoid using __builtin_return_address(0) because it fails in 762 Xorg's module loader 763 cdate Sat Sep 27 03:52:05 UTC 2008 764 who macallan 765 file src/libexec/ld.elf_so/rtld.c : 1.121 766 descr 767 workaround for PR port-macppc/37812 768 kcah 769 770 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 771 building the native compiler via build.sh those don't defined 772 properly. 773 cdate Sat Mar 12 08:00:00 UTC 2011 774 who matt 775 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h : 1.7 776 descr 777 see above 778 kcah 779 780port powerpc64 781 782 hack include _errno.c in libposix so that __errno resolves. It 783 should resolve from libc's errno, but somehow it does not. 784 Linker bug? 785 cdate Thu Oct 27 13:19:47 EDT 2011 786 who christos 787 file src/lib/libposix/Makefile: 1.15 788 file src/lib/librt/Makefile: 1.14 789 descr 790 workaround for: 791 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 792 R_PPC64_REL24 relocation against symbol `.__errno' 793 kcah 794 795 hack rename data() function in mdocml to avoid redefined error. 796 Compiler/Assembler bug? 797 cdate Sat Oct 29 11:16:01 EDT 2011 798 who christos 799 file src/external/bsd/mdocml/tbl_data.c: 1.2 800 descr 801 workaround for: 802 {standard input}: Assembler messages: 803 {standard input}:105: Error: symbol `.data' is already \ 804 defined 805 kcah 806 807port emips 808 809 hack Add nop between ctc1 and mtc0 to avoid assembler internal 810 error 811 cdate Sat Oct 29 16:57:34 EDT 2011 812 who christos 813 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 814 descr 815 workaround for: 816 {standard input}: Assembler messages: 817 {standard input}:730: Internal error! 818 Assertion failure in append_insn at /usr/src/external/gpl3/\ 819 binutils/dist/gas/config/tc-mips.c line 2910. 820 kcah 821 822port ia64 823 824 hack libgcc unwind dummy function 825 cdate Fri Apr 17 14:31:03 CEST 2015 826 who martin 827 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 828 descr 829 Add an empty _Unwind_FindTableEntry() implementation. 830 In the end we will use our libc stuff, and this should 831 go away again. 832 kcah 833 834port x68k 835 836 hack compiler error with gcc 4.5.x 837 cdate Fri May 24 13:23:01 EDT 2013 838 who christos 839 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 840 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 841 descr 842 workaround for: 843 internal compiler error: in cselib_record_set, at cselib.c:1999 844 kcah 845 846hack fallback to /usr/bin/clang-cpp in rpcgen 847cdate Wed Jun 5 15:49:27 CEST 2013 848who joerg 849file src/usr.bin/rpcgen/rpc_main.c : 1.35 850descr 851 It is undecided which compiler owns /usr/bin/cpp and whether it should 852 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 853 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 854 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 855kcah 856 857port hppa 858 859 hack compiler error with gcc 4.5.x 860 cdate Tue Jul 23 07:42:28 BST 2013 861 who skrll 862 file src/sys/lib/libkern/Makefile.libkern: 1.26 863 descr 864 workaround for unanalysed codegen bug affecting md5c.c. 865 kcah 866 867 hack gdb vs _rtld_debug_state problem 868 cdate Thu Mar 5 09:49:53 UTC 2015 869 who skrll 870 file src/libexec/ld.elf_so/rtld.c: 1.175 871 descr 872 workaround for problem where gdb misses the breakpoint on 873 _rtld_debug_state when the function is only the 874 bv,n %r0(%rp) instruction - the nullify seems to 875 confuse something 876 kcah 877 878port mips64* 879hack compiler crashes on mips64* with optimization enabled 880cdate Tue May 13 18:46:48 UTC 2014 881who macallan 882file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 883 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 884 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 885 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 886descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 887pr 48696 888kcah 889 890port vax 891hack compile boot with -O1 892cdate Sat May 24 09:40:58 CEST 2014 893who martin 894file src/sys/arch/vax/boot/boot/Makefile: 1.41 895descr /boot does not work when compiled with -O2 and gcc 4.8 896kcah 897 898port vax 899hack compile nir.c in gallium with -O1 900cdate Mon Oct 28 14:39:35 EDT 2019 901who christos 902file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 903descr gallium does not compile. 904kcah 905 906port sh3 907hack compile parse.c in battlestar with -Wno-restrict 908cdate Mon Oct 28 14:39:35 EDT 2019 909who christos 910file /cvsroot/src/games/battlestar/Makefile 1.11 911descr fails to compile, confused by char words[][]; 912 strcpy(words[n - 1], words[n + 1]); 913kcah 914 915port sh3 916hack compile ddns.c in dhcpcd with no-stringop-overflow 917cdate Tue Oct 29 20:25:59 EDT 2019 918who christos 919file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 920descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 921kcah 922 923port arm 924hack avoid using labels in a 12-bit constant. 925cdate Mon Mar 30 05:26:47 2015 UTC 926who matt 927file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 928descr workaround for clang misassembling an instruction 929kcah 930 931port sparc64 932hack during profiling with -m32 (and ASLR) labels are not generated 933 consistently 934cdate Sat Feb 11 04:56:37 2017 UTC 935who christos 936file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 937desc asn1_krb5_asn1.po does not produce the same results during successive 938 compilation runs; it is bimodal. Turning optimization to -O0 fixes 939 the issue 940kcah 941 942port ia64 943hack ski emulator crashes 944cdate Sat Apr 8 18:10:43 2017 UTC 945who scole 946file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 947desc 948 ski emulator crashes during acpi detection. Added a check for 949 uninitialized index. Submitted a request for change with upstream 950 mailing list, but never got a response 951kcah 952 953port vax 954hack compile rtld.c with -O0 955cdate Wed Apr 3 17:38:38 EDT 2019 956who christos 957file src/libexec/ld.elf_so/Makefile: 1.141 958descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 959 second pass loop with elm == 0xffffffff 960kcah 961 962port powerpc 963hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 964cdate Wed Jan 29 17:40:19 EST 2020 965who christos 966file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 967file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 968file src/tests/lib/libc/misc/Makefile: 1.5 969 970descr Disable optimization on tc.c, logerr.c, ubsan.c crashes: 971 lib/libLLVMCodeGen/../../llvm/../../external/apache2/llvm/lib/..\ 972 /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \ 973 function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const" 974kcah 975 976port m68k 977hack compile aes_ccm_tag() with -O0 978cdate Mon Aug 10 06:27:29 UTC 2020 979mdate Wed Aug 10 00:00:00 UTC 2022 980who rin 981file src/sys/crypto/aes/aes_ccm.c: 1.5 982descr GCC 9.4 and 8.3 miscompile aes_ccm_tag() for m68k with optimization 983 level -O[12], which results in failure in aes_ccm_selftest(). 984 For 9.4, -O0 and -O1 work but -O2 fails for amiga (A1200, 68060) and 985 mac68k (Quadra 840AV, 68040). Whereas -O0 and -O2 work but -O1 fails 986 for sun3 (TME, 68020 emulator) and sun2 (TME, 68010 emulator). 987 aes_ccm_selftest() still fails with GCC 10.4 and -O2. 988kcah 989 990port sh3 991 992 hack gcc9-sh3-lint 993 cdate Tue Jun 22 14:59:52 CEST 2021 994 mdate Mon Jul 5 12:34:57 CEST 2021 995 who hgutch 996 file external/gpl3/gcc/dist/gcc/config/sh/sh.md 1.2 997 external/gpl3/gcc.old/dist/gcc/config/sh/sh.md 1.11 998 descr 999 The in-tree gcc 9/gcc 10 crashes with an internal 1000 invalid opcode exception when using any kind of 1001 optimization on lex.c in usr.bin/xlint/lint . This 1002 was introduced apparently unintendedly in gcc when 1003 addressing a different issue. Rather than disabling 1004 optimization for lex.c, instead revert the change to 1005 gcc. The bug report upstream has been updated to 1006 reflect the exact breakage. 1007 1008 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101177 1009kcah 1010 1011port sh3 1012hack compile lint1/initdecl() with -O0 for sh3 (port-sh3/56311) 1013cdate Thu Jul 15 07:58:05 UTC 2021 1014mdate Fri Jul 16 10:00:00 UTC 2021 1015who rin 1016file src/usr.bin/xlint/lint1/decl.c: 1.200 1017descr GCC 9 and 10 miscompile initdecl() due to mischoice of register, 1018 as described in the PR. Compiling this function with -O0 works 1019 around the problem. 1020 The problem has been reported to upstream as GCC Bug 101469: 1021 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101469 1022kcah 1023 1024port vax 1025hack compile blake2b.c with -O0 for vax 1026cdate Wed Oct 13 14:28:32 UTC 2021 1027mdate Wed Oct 13 14:28:32 UTC 2021 1028who nia 1029file src/lib/libcrypt/Makefile: 1.200 1030descr GCC 10 fails to build blake2b.c with an internal compiler 1031 error unless optimization is disabled. 1032kcah 1033 1034port arm 1035hack compile t_sig_backtrace with -fno-omit-frame-pointer for arm 1036cdate Tue Nov 23 23:24:37 UTC 2021 1037mdate Tue Nov 23 23:24:37 UTC 2021 1038who thorpej 1039file src/tests/lib/libexecinfo/Makefile: 1.8 1040file src/tests/lib/libexecinfo/t_sig_backtrace: 1.2 1041descr Unit test fails to pass unless t_sig_backtrace.c is compiled 1042 with -fno-omit-frame-pointer and -DNOINLINE_HACK. 1043kcah 1044 1045hack alpha gcc error in lint 1046cdate 2022/04/10 13:21:34 1047who martin 1048port alpha 1049file usr.bin/xlint/Makefile.inc: 1.23 1050pr 56789 1051descr 1052 Compiling lint with -ftrapv fails with an internal 1053 gcc compiler error. 1054 1055 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105209 1056kcah 1057