HACKS revision 1.231
1 # $NetBSD: HACKS,v 1.231 2022/09/12 08:11:51 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 30 hack llvm needs no-unused-command-line-argument 31 mdate 10 May 2020 32 who maxv 33 file share/mk/bsd.lib.mk 1.380 -> 1.381 34 descr 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. 38 kcah 39 40 hack static linking with libpthread 41 mdate 7 May 2019 42 who maya 43 file src/lib/libpthread/Makefile 1.92 -> 1.94 44 descr 45 To avoid some libc thread stub functions being picked up 46 in static builds, link pthread as one section. 47 kcah 48 49 hack disable optimization for gcc-9.3 in src/lib/libc/gdtoa/strtod.c 50 mdate 18 Sep 2020 51 who christos 52 file src/lib/libc/gdtoa/strtod.c 1.15 -> 1.16 53 descr 54 See PR/55668, the program there causes infinite loop 55 kcah 56 57 hack gcc-5.3 optimizes memset+malloc -> calloc inside calloc 58 mdate 4 May 2016 59 who christos 60 file external/gpl2/lib/libmalloc/lib/Makefile 1.3 -> 1.5 61 descr 62 resulting in infinite recursion; we prevent this with 63 -fno-builtin-malloc 64 kcah 65 66 hack turn off tree-vrp for parts of ufs_lookup.c 67 mdate 28 April 2016 68 who mrg christos 69 file src/sys/ufs/ufs/ufs_lookup.c : 1.144 70 pr 51094 71 descr 72 with -ftree-vrp enabled in ufs_lookup.c sometimes bad dir 73 panicks are see. 74 hcah 75 76 hack netstat ieee1394 address printing. 77 mdate 14 Nov 2000 78 who matt 79 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 80 descr 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. 84 kcah 85 86 hack xterm vs. libterm 87 mdate 01 Aug 2000 88 who jdc 89 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 90 pr 10383 91 descr 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. 97 kcah 98 99 hack wi-at-big-endian-bus 100 cdate 15 Mar 2002 101 who martin 102 file dev/ic/wireg.h : 1.20 103 descr 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. 107 kcah 108 109 hack specific knowledge of colours in curses code 110 cdate Sun Apr 6 11:05:24 BST 2003 111 who jdc 112 file lib/libcurses/color.c : r1.24 113 descr 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 118 kcah 119 120 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 121 cdate 21 Aug 2003 122 who he 123 file sys/miscfs/procfs/procfs_linux.c : 1.14 124 descr 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. 131 kcah 132 133 hack gcc4 wrong uninitialized variable 134 mdate 10 May 2006 135 who mrg 136 file bin/ksh/eval.c : 1.6 137 file bin/sh/histedit.c : 1.39 138 file bin/sh/parser.c : 1.60 139 file crypto/dist/heimdal/kdc/524.c : 1.10 140 file crypto/dist/ssh/sftp.c : 1.20 141 file crypto/dist/ssh/ssh-keysign.c : 1.11 142 file dist/ipf/lib/hostname.c : 1.2 143 file dist/ipf/tools/ipmon.c : 1.8 144 file dist/ntp/ntpd/ntp_request.c : 1.4 145 file dist/ntp/ntpd/refclock_shm.c : 1.4 146 file dist/ntp/sntp/timing.c : 1.3 147 file dist/pppd/pppstats/pppstats.c : 1.3 148 file dist/tcpdump/print-zephyr.c : 1.5 149 file distrib/utils/sysinst/aout2elf.c : 1.12 150 file gnu/libexec/uucp/uucico/uucico.c : 1.6 151 file lib/libc/citrus/citrus_csmapper.c : 1.6 152 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 153 file lib/libc/inet/inet_cidr_ntop.c : 1.3 154 file lib/libc/inet/inet_ntop.c : 1.3 155 file lib/libc/stdio/vfwprintf.c : 1.8 156 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 157 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 158 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 159 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 160 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 161 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 162 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 163 file sbin/fsck_ext2fs/dir.c : 1.19 164 file sbin/routed/rtquery/rtquery.c : 1.18 165 file sys/arch/amd64/amd64/pmap.c : 1.26 166 file sys/arch/i386/pci/piixpcib.c : 1.4 167 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 168 file sys/crypto/cast128/cast128.c : 1.9 169 file sys/ddb/db_command.c : 1.86 170 file sys/dev/cardbus/cardbus_map.c : 1.21 171 file sys/dev/fss.c : 1.25 172 file sys/dev/ic/igsfb.c : 1.39 173 file sys/dev/ic/mb86950.c : 1.5 174 file sys/dev/ic/midway.c : 1.71 175 file sys/dev/kttcp.c : 1.18 176 file sys/dev/rasops/rasops_bitops.h : 1.9 177 file sys/dev/pci/cmpci.c : 1.31 178 file sys/dev/pci/machfb.c : 1.45 179 file sys/dev/usb/ohci.c : 1.174 180 file sys/dev/usb/uhci.c : 1.196 181 file sys/dev/rasops/rasops_bitops.h : 1.9 182 file sys/dist/ipf/netinet/ip_nat.c : 1.10 183 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 184 file sys/dist/pf/net/pf.c : 1.22 185 file sys/fs/udf/udf_vnops.c : 1.4 186 file sys/kern/kern_sig.c : 1.219 187 file sys/kern/tty.c : 1.181 188 file sys/net/bpf.c : 1.116 189 file sys/net/zlib.c : 1.26 190 file sys/netccitt/if_x25subr.c : 1.37 191 file sys/netinet/in.c : 1.107 192 file sys/nfs/nfs_serv.c : 1.108 193 file sys/nfs/nfs_socket.c : 1.129 194 file sys/nfs/nfs_syscalls.c : 1.91 195 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 196 file usr.bin/ftp/ftp.c : 1.140 197 file usr.bin/find/function.c : 1.54 198 file usr.bin/mail/tty.c : 1.20 199 file usr.bin/msgc/msg_sys.def : 1.33-1.34 200 file usr.bin/nl/nl.c : 1.7 201 file usr.bin/systat/keyboard.c : 1.23 202 file usr.bin/usbhidctl/usbhid.c : 1.29 203 file usr.bin/vi/cl/cl_read.c : 1.5 204 file usr.bin/vi/ex/ex_cscope.c : 1.12 205 file usr.bin/vi/ex/ex_tag.c : 1.19 206 file usr.bin/vi/vi/v_txt.c : 1.15 207 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 208 file usr.sbin/cron/do_command.c : 1.19 209 file usr.sbin/timed/timed/slave.c : 1.15 210 descr 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. 219 kcah 220 221 hack gcc4 pointer sign and strict aliasing problems 222 mdate 10 May 2006 223 who mrg 224 file bin/ed/Makefile : 1.33 225 file distrib/utils/sysinst/Makefile.inc : 1.44 226 file distrib/utils/x_dhclient/Makefile : 1.15 227 file games/bcd/Makefile : 1.5 228 file games/dab/Makefile : 1.5 229 file games/larn/Makefile : 1.17 230 file games/pom/Makefile : 1.5 231 file lib/libasn1/Makefile : 1.26 232 file lib/libcrypt/Makefile : 1.17 233 file lib/libgssapi/Makefile : 1.16 234 file lib/libhdb/Makefile : 1.20 235 file lib/libkadm5clnt/Makefile : 1.21 236 file lib/libkadm5srv/Makefile : 1.25 237 file lib/libkrb5/Makefile : 1.35 238 file lib/libssh/Makefile : 1.6 239 file lib/libtelnet/Makefile : 1.26 240 file libexec/getty/Makefile : 1.14 241 file libexec/kadmind/Makefile : 1.19 242 file libexec/kpasswdd/Makefile : 1.14 243 file sbin/atactl/Makefile : 1.3 244 file sbin/cgdconfig/Makefile : 1.7 245 file sbin/clri/Makefile : 1.13 246 file sbin/dkctl/Makefile : 1.4 247 file sbin/dump/Makefile : 1.33 248 file sbin/fdisk/Makefile : 1.35 249 file sbin/fsck_ext2fs/Makefile : 1.11 250 file sbin/fsck_ffs/Makefile : 1.29 251 file sbin/fsdb/Makefile : 1.18 252 file sbin/newfs/Makefile : 1.30 253 file sbin/newfs_sysvbfs/Makefile : 1.2 254 file sbin/restore/Makefile : 1.23 255 file sbin/veriexecctl/Makefile : 1.11 256 file sys/lib/libsa/Makefile : 1.59 257 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 258 file usr.bin/awk/Makefile : 1.9 259 file usr.bin/crontab/Makefile : 1.24 260 file usr.bin/ctags/Makefile : 1.8 261 file usr.bin/gzip/Makefile : 1.10 262 file usr.bin/ssh/sftp/Makefile : 1.10 263 file usr.bin/ssh/ssh/Makefile : 1.25 264 file usr.bin/vi/build/Makefile : 1.26 265 file usr.bin/telnet/Makefile : 1.40 266 file usr.bin/tn3270/tn3270/Makefile : 1.36 267 file usr.bin/tr/Makefile : 1.4 268 file usr.sbin/amd/amd/Makefile : 1.27 269 file usr.sbin/amd/amq/Makefile : 1.14 270 file usr.sbin/amd/libamu/Makefile : 1.20 271 file usr.sbin/amd/pawd/Makefile : 1.5 272 file usr.sbin/bind/Makefile.inc : 1.22 273 file usr.sbin/bind/libdns/Makefile : 1.3 274 file usr.sbin/bind/named/Makefile : 1.17 275 file usr.sbin/bootp/bootptest/Makefile : 1.2 276 file usr.sbin/chrtbl/Makefile : 1.6 277 file usr.sbin/cron/Makefile : 1.12 278 file usr.sbin/dhcp/Makefile.inc : 1.20 279 file usr.sbin/hprop/Makefile : 1.13 280 file usr.sbin/installboot/Makefile : 1.35 281 file usr.sbin/ipf/ipftest/Makefile : 1.32 282 file usr.sbin/isdn/isdnd/Makefile : 1.6 283 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 284 file usr.sbin/isdn/isdntel/Makefile : 1.2 285 file usr.sbin/isdn/isdntrace/Makefile : 126 286 file usr.sbin/mopd/common/Makefile : 1.10 287 file usr.sbin/mopd/mopd/Makefile : 1.9 288 file usr.sbin/mopd/mopprobe/Makefile : 1.7 289 file usr.sbin/makefs/Makefile : 1.17 290 file usr.sbin/mscdlabel/Makefile : 1.5 291 file usr.sbin/pkg_install/add/Makefile : 1.7 292 file usr.sbin/pkg_install/create/Makefile : 1.5 293 file usr.sbin/pkg_install/lib/Makefile : 1.28 294 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 295 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 296 file usr.sbin/pppd/Makefile.inc : 1.3 297 file usr.sbin/pppd/pppd/Makefile : 1.38 298 file usr.sbin/rarpd/Makefile : 1.10 299 file usr.sbin/rbootd/Makefile : 1.10 300 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 301 file usr.sbin/tcpdump/Makefile : 1.42 302 descr 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. 306 kcah 307 308 hack disable ctf for gcc-4.8 build 309 mdate April 3 2014 310 who christos 311 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 312 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 313 descr 314 nbctfconvert -g -L VERSION -g fold-const.o 315 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 316 ((null)) <13532> 317 kcak 318 319 hack emacs aborting on exit (libgcc issue) 320 mdate 7 November 2011 321 who christos 322 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 323 descr 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. 328 kcah 329 330 hack cross-building hack on Darwin 331 mdate 20 July 2008 332 who agc 333 file src/distrib/common/Makefile.mdset : 1.33 334 descr 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 341 kcah 342 343 hack avoid rebuilding asn1 libraries 344 mdate 03 August 2008 345 who veego 346 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 347 file src/lib/libasn1/Makefile : 1.32 348 file src/lib/libhdb/Makefile : 1.23 349 file src/lib/libgssapi/Makefile : 1.20 350 file src/lib/libhx509/Makefile : 1.3 351 pr 9702 39185 352 descr 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. 356 kcah 357 358 hack Disable fortification for /usr/bin/makeinfo 359 cdata 24 Mar 2014 360 who tron 361 file src/external/gpl2/texinfo/bin/makeinfo/Makefile : 1.1 362 pr N/A 363 descr 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. 367 kcah 368 369 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 370 cdata 05 Apr 2014 371 who tron 372 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 373 pr N/A 374 descr 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. 383 kcah 384 385 hack g++ 5.x barfs on volatile in constexpr initializers 386 cdata 27 Aug 2015 387 who pooka 388 file src/lib/libpthread/pthread_types.h : 1.17 389 pr lib/49989 390 descr 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; 404 kcah 405 406 hack libm cabs{,f,l} and g++ 407 cdata 11 Jan 2016 408 who christos 409 pr lib/50646 410 file src/external/gpl3/gcc.old/dist/libstdc++-v3/include/std/complex : 1.2 411 file src/external/gpl3/gcc/dist/libstdc++-v3/include/std/complex : 1.2 412 descr 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. 421 kcah 422 423 port 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 port 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 631 632 port 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 644 645 port 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 664 665 port 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 676 677 port 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 694 695 696 port 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 733 734 port 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 745 746 port 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 758 759 port 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 779 780 port 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 806 807 port 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 821 822 port 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 833 834 port 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 845 846 hack fallback to /usr/bin/clang-cpp in rpcgen 847 cdate Wed Jun 5 15:49:27 CEST 2013 848 who joerg 849 file src/usr.bin/rpcgen/rpc_main.c : 1.35 850 descr 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. 855 kcah 856 857 port 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 877 878 port mips64* 879 hack compiler crashes on mips64* with optimization enabled 880 cdate Tue May 13 18:46:48 UTC 2014 881 who macallan 882 file 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: 1.5 886 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 887 pr 48696 888 kcah 889 890 port vax 891 hack compile boot with -O1 892 cdate Sat May 24 09:40:58 CEST 2014 893 who martin 894 file src/sys/arch/vax/boot/boot/Makefile: 1.41 895 descr /boot does not work when compiled with -O2 and gcc 4.8 896 kcah 897 898 port vax 899 hack compile nir.c in gallium with -O1 900 cdate Mon Oct 28 14:39:35 EDT 2019 901 who christos 902 file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 903 descr gallium does not compile. 904 kcah 905 906 port sh3 907 hack compile parse.c in battlestar with -Wno-restrict 908 cdate Mon Oct 28 14:39:35 EDT 2019 909 who christos 910 file /cvsroot/src/games/battlestar/Makefile 1.11 911 descr fails to compile, confused by char words[][]; 912 strcpy(words[n - 1], words[n + 1]); 913 kcah 914 915 port sh3 916 hack compile ddns.c in dhcpcd with no-stringop-overflow 917 cdate Tue Oct 29 20:25:59 EDT 2019 918 who christos 919 file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 920 descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 921 kcah 922 923 port arm 924 hack avoid using labels in a 12-bit constant. 925 cdate Mon Mar 30 05:26:47 2015 UTC 926 who matt 927 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 928 descr workaround for clang misassembling an instruction 929 kcah 930 931 port sparc64 932 hack during profiling with -m32 (and ASLR) labels are not generated 933 consistently 934 cdate Sat Feb 11 04:56:37 2017 UTC 935 who christos 936 file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 937 desc 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 940 kcah 941 942 port ia64 943 hack ski emulator crashes 944 cdate Sat Apr 8 18:10:43 2017 UTC 945 who scole 946 file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 947 desc 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 951 kcah 952 953 port vax 954 hack compile rtld.c with -O0 955 cdate Wed Apr 3 17:38:38 EDT 2019 956 who christos 957 file src/libexec/ld.elf_so/Makefile: 1.141 958 descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 959 second pass loop with elm == 0xffffffff 960 kcah 961 962 port powerpc 963 hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 964 cdate Wed Jan 29 17:40:19 EST 2020 965 who christos 966 file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 967 file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 968 file src/tests/lib/libc/misc/Makefile: 1.5 969 970 descr 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" 974 kcah 975 976 port m68k 977 hack compile aes_ccm_tag() with -O0 978 cdate Mon Aug 10 06:27:29 UTC 2020 979 mdate Wed Aug 10 00:00:00 UTC 2022 980 who rin 981 file src/sys/crypto/aes/aes_ccm.c: 1.5 982 descr 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. 988 kcah 989 990 port 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 1009 kcah 1010 1011 port sh3 1012 hack compile lint1/initdecl() with -O0 for sh3 (port-sh3/56311) 1013 cdate Thu Jul 15 07:58:05 UTC 2021 1014 mdate Fri Jul 16 10:00:00 UTC 2021 1015 who rin 1016 file src/usr.bin/xlint/lint1/decl.c: 1.200 1017 descr 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 1022 kcah 1023 1024 port vax 1025 hack compile blake2b.c with -O0 for vax 1026 cdate Wed Oct 13 14:28:32 UTC 2021 1027 mdate Wed Oct 13 14:28:32 UTC 2021 1028 who nia 1029 file src/lib/libcrypt/Makefile: 1.200 1030 descr GCC 10 fails to build blake2b.c with an internal compiler 1031 error unless optimization is disabled. 1032 kcah 1033 1034 port arm 1035 hack compile t_sig_backtrace with -fno-omit-frame-pointer for arm 1036 cdate Tue Nov 23 23:24:37 UTC 2021 1037 mdate Tue Nov 23 23:24:37 UTC 2021 1038 who thorpej 1039 file src/tests/lib/libexecinfo/Makefile: 1.8 1040 file src/tests/lib/libexecinfo/t_sig_backtrace: 1.2 1041 descr Unit test fails to pass unless t_sig_backtrace.c is compiled 1042 with -fno-omit-frame-pointer and -DNOINLINE_HACK. 1043 kcah 1044 1045 hack alpha gcc error in lint 1046 cdate 2022/04/10 13:21:34 1047 who martin 1048 port alpha 1049 file usr.bin/xlint/Makefile.inc: 1.23 1050 pr 56789 1051 descr 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 1056 kcah 1057 1058 hack compile copy{in,out}() for ibm4xx with -O0 for clang 1059 cdate Mon Sep 12 08:06:36 UTC 2022 1060 who rin 1061 port evbppc 1062 file sys/arch/powerpc/ibm4xx/trap.c: 1.99 1063 descr 1064 clang 13.0.0 miscompiles copy{in,out}() with -O[12]. As a result, 1065 kernel cannot execute /sbin/init. 1066 kcah 1067
Indexes created Wed Nov 05 19:10:08 GMT 2025