HACKS revision 1.232
1 # $NetBSD: HACKS,v 1.232 2022/12/04 22:35:15 jakllsch Exp $ 2 # 3 # This file is intended to document workarounds for currently unsolved 4 # (mostly) compiler bugs. 5 # 6 # Format: 7 # hack title 8 # cdate creation date 9 # mdate mod date 10 # who responsible developer 11 # port ... 12 # affected ports, space separated, if not "all" 13 # file affected file : revision : line from : line to 14 # affected files and revision and line numbers describing hack 15 # multiple lines if necessary. 16 # pr NNNN ... 17 # problem reports this hack works around, if known. Space 18 # separated. 19 # regress src/regress/directory/where/test/found 20 # regression test directories, if available. 21 # descr 22 # insert short informal description (multi-line). (Longer ones 23 # should be in the PR database. More formal descriptions might 24 # be in the regress tree. See above). 25 # kcah 26 # closing bracket. 27 # 28 # this is a comment. 29 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 hack gdtoa/misc.c miscompile 596 cdate Sun Dec 4 22:27:26 UTC 2022 597 who jakllsch 598 file src/lib/libc/gdtoa/Makefile.inc : 1.11 599 descr 600 some doubles print as garbage if gdtoa/misc.c isn't compiled at -O0 601 kcah 602 603 port arm 604 605 hack gcc-unsigned-compare 606 cdate 09 Mar 2002 607 mdate 18 Mar 2002 608 who bjh21 609 file dist/bind/lib/nameser/ns_parse.c : 1.3 610 file dist/dhcp/minires/ns_parse.c : 1.3 611 file dist/dhcp/omapip/result.c : 1.2 612 file dist/dhcp/server/failover.c : 1.3 613 file gnu/dist/toolchain/bfd/bfd.c : 1.2 614 file gnu/dist/toolchain/bfd/format.c : 1.2 615 file gnu/dist/toolchain/gdb/target.c : 1.2 616 file sys/kern/vfs_subr.c : 1.172 617 descr When checking that a potentially-unsigned enum is >= 0, assign 618 it to an int first. This is necessary to avoid "comparison is 619 always true" warnings with -fshort-enums. Casting to an int 620 really should be enough, but turns out not to be. 621 kcah 622 623 hack gcc-4.5 arm CNAME hostname lookup failure on 624 certain DNS environment (probably -ftree-ter problem) 625 cdate Sat Dec 24 04:59:00 UTC 2011 626 mdate 627 who tsutsui 628 file lib/libc/net/Makefile.inc 1.79 629 descr Hostname lookup against CNAMEs by some commands fails 630 on certain DNS environments if lib/libc/net/gethnamaddr.c 631 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 632 are compiled with -O2, even though nslookup(1) against 633 the same CNAME returns proper hostname. 634 They works properly if compiled with -O2 -fno-tree-ter. 635 Also -O2 fails but -O2 -fno-tree-ter works on the following 636 test case in gcc bugzilla: 637 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 638 kcah 639 640 port sh3 641 642 hack gcc4-sh3-bz2 643 cdate Sun May 21 03:34:57 UTC 2006 644 mdate Fri May 16 13:13:00 UTC 2008 645 who mrg, tsutsui 646 file lib/libbz2/Makefile : 1.10 647 descr 648 The in-tree GCC 4.1-based compiler generated too-far 649 pc-relative addresses. Hack is to build with 650 -fno-loop-optimize. 651 kcah 652 653 port m68000 654 655 hack gcc4-m68000 656 cdate Fri Feb 8 10:29:37 PST 2008 657 mdate Sun May 4 15:37:19 UTC 2008 658 who mrg, tsutsui 659 file rescue/Makefile : 1.21 660 file sbin/dump_lfs/Makefile : 1.9 661 file sbin/fsck_ffs/Makefile : 1.35 662 file sbin/fsdb/Makefile : 1.22 663 file share/mk/sys.mk : 1.96 664 file usr.sbin/ndbootd/Makefile : 1.5 665 descr 666 Several internal compiler errors with gcc -O1 667 around 64bit integer arithmetic. 668 This hack uses -O1 and adds some -fno-tree-foo options 669 to avoid the problem. 670 This might be related with GCC Bugzilla Bug 32424. 671 kcah 672 673 port m68k,sh3,vax 674 675 hack gcc-4.8.1 676 cdate Wed Nov 6 20:41:35 EST 2013 677 who christos 678 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 679 descr 680 compile hashtable_c++0x.cc with -O2 instead of -Os to 681 produce missing instantiation of std::lower_bound expansion 682 for unsigned long. 683 kcah 684 685 port sparc 686 687 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 688 cdate Sun Aug 14 19:26:48 PDT 2011 689 who mrg 690 file sys/arch/sparc64/sparc/cpu.c : 1.234 691 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 692 file sys/arch/sparc64/sparc/genassym.cf : 1.67 693 file sys/arch/sparc64/sparc/locore.s : 1.265 694 descr 695 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 696 Post newlock2 there was a bug where a lock was reduced from 697 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 698 would crash due to NULL IPI. This was fixed by re-using the 699 right IPL value. However, GCC 4.5.3 build kernels have the 700 same problems. For now, the hack is re-instated. 701 kcah 702 703 704 port mips 705 706 hack mips-shared-linker-load-address 707 cdate Fri Oct 7 08:33:10 UTC 2005 708 who simonb 709 file src/sys/kern/exec_elf32.c : 1.107 710 descr 711 With COMPAT_16 or previous enabled (which enables 712 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 713 load and run at address 0. The check to fix this in 714 rev 1.107 only checks the first psection of the ELF 715 executable, which may not be loadable. A more correct 716 fix is to check the first loadable psection instead of 717 just the first psection. 718 kcah 719 720 hack mips-duplicate-ras-end-label 721 cdate Sat Sep 2 23:29:42 2006 722 who martin 723 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 724 descr 725 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 726 labels by duplicated __asm output from RAS_END() 727 macro. 728 kcah 729 730 hack mips-mcount-assembler-warning 731 cdate Tue Jul 29 14:16:52 UTC 2008 732 who lukem 733 file src/lib/libc/gmon/Makefile.inc : 1.8 734 descr 735 Workaround for PR port-mips/39192. 736 common/lib/libc/gmon/mcount.c generates a (fatal) 737 assembler warning on MIPS: 738 Warning: No .cprestore pseudo-op used in PIC code 739 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 740 kcah 741 742 port i386 743 744 hack use volatile intermediate variable to enforce rounding 745 cdate Tue Aug 1 22:15:55 MEST 2006 746 who drochner 747 file src/lib/libm/src/lrintf.c : 1.4 748 file src/lib/libm/src/s_rintf.c : 1.8 749 descr 750 gcc-4 does subsequent operations on "float" values within 751 the i387 FPU without rounding the intermediate results 752 kcah 753 754 port x86 755 hack turn off optimization for biosdisk_ll.c because otherwise 756 we are pass the wrong arguments to biosdisk_read(). 757 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 758 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 759 cdate Mon Apr 7 21:09:55 2014 UTC 760 who christos 761 file src/sys/arch/i386/stand/lib/Makefile : 1.38 762 descr 763 Turning on DISK_DEBUG shows the problem. We should find 764 out which option is causing this. 765 hcah 766 767 port powerpc 768 769 hack avoid using __builtin_return_address(0) because it fails in 770 Xorg's module loader 771 cdate Sat Sep 27 03:52:05 UTC 2008 772 who macallan 773 file src/libexec/ld.elf_so/rtld.c : 1.121 774 descr 775 workaround for PR port-macppc/37812 776 kcah 777 778 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 779 building the native compiler via build.sh those don't defined 780 properly. 781 cdate Sat Mar 12 08:00:00 UTC 2011 782 who matt 783 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h : 1.7 784 descr 785 see above 786 kcah 787 788 port powerpc64 789 790 hack include _errno.c in libposix so that __errno resolves. It 791 should resolve from libc's errno, but somehow it does not. 792 Linker bug? 793 cdate Thu Oct 27 13:19:47 EDT 2011 794 who christos 795 file src/lib/libposix/Makefile: 1.15 796 file src/lib/librt/Makefile: 1.14 797 descr 798 workaround for: 799 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 800 R_PPC64_REL24 relocation against symbol `.__errno' 801 kcah 802 803 hack rename data() function in mdocml to avoid redefined error. 804 Compiler/Assembler bug? 805 cdate Sat Oct 29 11:16:01 EDT 2011 806 who christos 807 file src/external/bsd/mdocml/tbl_data.c: 1.2 808 descr 809 workaround for: 810 {standard input}: Assembler messages: 811 {standard input}:105: Error: symbol `.data' is already \ 812 defined 813 kcah 814 815 port emips 816 817 hack Add nop between ctc1 and mtc0 to avoid assembler internal 818 error 819 cdate Sat Oct 29 16:57:34 EDT 2011 820 who christos 821 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 822 descr 823 workaround for: 824 {standard input}: Assembler messages: 825 {standard input}:730: Internal error! 826 Assertion failure in append_insn at /usr/src/external/gpl3/\ 827 binutils/dist/gas/config/tc-mips.c line 2910. 828 kcah 829 830 port ia64 831 832 hack libgcc unwind dummy function 833 cdate Fri Apr 17 14:31:03 CEST 2015 834 who martin 835 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 836 descr 837 Add an empty _Unwind_FindTableEntry() implementation. 838 In the end we will use our libc stuff, and this should 839 go away again. 840 kcah 841 842 port x68k 843 844 hack compiler error with gcc 4.5.x 845 cdate Fri May 24 13:23:01 EDT 2013 846 who christos 847 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 848 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 849 descr 850 workaround for: 851 internal compiler error: in cselib_record_set, at cselib.c:1999 852 kcah 853 854 hack fallback to /usr/bin/clang-cpp in rpcgen 855 cdate Wed Jun 5 15:49:27 CEST 2013 856 who joerg 857 file src/usr.bin/rpcgen/rpc_main.c : 1.35 858 descr 859 It is undecided which compiler owns /usr/bin/cpp and whether it should 860 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 861 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 862 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 863 kcah 864 865 port hppa 866 867 hack compiler error with gcc 4.5.x 868 cdate Tue Jul 23 07:42:28 BST 2013 869 who skrll 870 file src/sys/lib/libkern/Makefile.libkern: 1.26 871 descr 872 workaround for unanalysed codegen bug affecting md5c.c. 873 kcah 874 875 hack gdb vs _rtld_debug_state problem 876 cdate Thu Mar 5 09:49:53 UTC 2015 877 who skrll 878 file src/libexec/ld.elf_so/rtld.c: 1.175 879 descr 880 workaround for problem where gdb misses the breakpoint on 881 _rtld_debug_state when the function is only the 882 bv,n %r0(%rp) instruction - the nullify seems to 883 confuse something 884 kcah 885 886 port mips64* 887 hack compiler crashes on mips64* with optimization enabled 888 cdate Tue May 13 18:46:48 UTC 2014 889 who macallan 890 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 891 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 892 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 893 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 894 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 895 pr 48696 896 kcah 897 898 port vax 899 hack compile boot with -O1 900 cdate Sat May 24 09:40:58 CEST 2014 901 who martin 902 file src/sys/arch/vax/boot/boot/Makefile: 1.41 903 descr /boot does not work when compiled with -O2 and gcc 4.8 904 kcah 905 906 port vax 907 hack compile nir.c in gallium with -O1 908 cdate Mon Oct 28 14:39:35 EDT 2019 909 who christos 910 file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 911 descr gallium does not compile. 912 kcah 913 914 port sh3 915 hack compile parse.c in battlestar with -Wno-restrict 916 cdate Mon Oct 28 14:39:35 EDT 2019 917 who christos 918 file /cvsroot/src/games/battlestar/Makefile 1.11 919 descr fails to compile, confused by char words[][]; 920 strcpy(words[n - 1], words[n + 1]); 921 kcah 922 923 port sh3 924 hack compile ddns.c in dhcpcd with no-stringop-overflow 925 cdate Tue Oct 29 20:25:59 EDT 2019 926 who christos 927 file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 928 descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 929 kcah 930 931 port arm 932 hack avoid using labels in a 12-bit constant. 933 cdate Mon Mar 30 05:26:47 2015 UTC 934 who matt 935 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 936 descr workaround for clang misassembling an instruction 937 kcah 938 939 port sparc64 940 hack during profiling with -m32 (and ASLR) labels are not generated 941 consistently 942 cdate Sat Feb 11 04:56:37 2017 UTC 943 who christos 944 file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 945 desc asn1_krb5_asn1.po does not produce the same results during successive 946 compilation runs; it is bimodal. Turning optimization to -O0 fixes 947 the issue 948 kcah 949 950 port ia64 951 hack ski emulator crashes 952 cdate Sat Apr 8 18:10:43 2017 UTC 953 who scole 954 file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 955 desc 956 ski emulator crashes during acpi detection. Added a check for 957 uninitialized index. Submitted a request for change with upstream 958 mailing list, but never got a response 959 kcah 960 961 port vax 962 hack compile rtld.c with -O0 963 cdate Wed Apr 3 17:38:38 EDT 2019 964 who christos 965 file src/libexec/ld.elf_so/Makefile: 1.141 966 descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 967 second pass loop with elm == 0xffffffff 968 kcah 969 970 port powerpc 971 hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 972 cdate Wed Jan 29 17:40:19 EST 2020 973 who christos 974 file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 975 file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 976 file src/tests/lib/libc/misc/Makefile: 1.5 977 978 descr Disable optimization on tc.c, logerr.c, ubsan.c crashes: 979 lib/libLLVMCodeGen/../../llvm/../../external/apache2/llvm/lib/..\ 980 /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \ 981 function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const" 982 kcah 983 984 port m68k 985 hack compile aes_ccm_tag() with -O0 986 cdate Mon Aug 10 06:27:29 UTC 2020 987 mdate Wed Aug 10 00:00:00 UTC 2022 988 who rin 989 file src/sys/crypto/aes/aes_ccm.c: 1.5 990 descr GCC 9.4 and 8.3 miscompile aes_ccm_tag() for m68k with optimization 991 level -O[12], which results in failure in aes_ccm_selftest(). 992 For 9.4, -O0 and -O1 work but -O2 fails for amiga (A1200, 68060) and 993 mac68k (Quadra 840AV, 68040). Whereas -O0 and -O2 work but -O1 fails 994 for sun3 (TME, 68020 emulator) and sun2 (TME, 68010 emulator). 995 aes_ccm_selftest() still fails with GCC 10.4 and -O2. 996 kcah 997 998 port sh3 999 1000 hack gcc9-sh3-lint 1001 cdate Tue Jun 22 14:59:52 CEST 2021 1002 mdate Mon Jul 5 12:34:57 CEST 2021 1003 who hgutch 1004 file external/gpl3/gcc/dist/gcc/config/sh/sh.md 1.2 1005 external/gpl3/gcc.old/dist/gcc/config/sh/sh.md 1.11 1006 descr 1007 The in-tree gcc 9/gcc 10 crashes with an internal 1008 invalid opcode exception when using any kind of 1009 optimization on lex.c in usr.bin/xlint/lint . This 1010 was introduced apparently unintendedly in gcc when 1011 addressing a different issue. Rather than disabling 1012 optimization for lex.c, instead revert the change to 1013 gcc. The bug report upstream has been updated to 1014 reflect the exact breakage. 1015 1016 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101177 1017 kcah 1018 1019 port sh3 1020 hack compile lint1/initdecl() with -O0 for sh3 (port-sh3/56311) 1021 cdate Thu Jul 15 07:58:05 UTC 2021 1022 mdate Fri Jul 16 10:00:00 UTC 2021 1023 who rin 1024 file src/usr.bin/xlint/lint1/decl.c: 1.200 1025 descr GCC 9 and 10 miscompile initdecl() due to mischoice of register, 1026 as described in the PR. Compiling this function with -O0 works 1027 around the problem. 1028 The problem has been reported to upstream as GCC Bug 101469: 1029 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101469 1030 kcah 1031 1032 port vax 1033 hack compile blake2b.c with -O0 for vax 1034 cdate Wed Oct 13 14:28:32 UTC 2021 1035 mdate Wed Oct 13 14:28:32 UTC 2021 1036 who nia 1037 file src/lib/libcrypt/Makefile: 1.200 1038 descr GCC 10 fails to build blake2b.c with an internal compiler 1039 error unless optimization is disabled. 1040 kcah 1041 1042 port arm 1043 hack compile t_sig_backtrace with -fno-omit-frame-pointer for arm 1044 cdate Tue Nov 23 23:24:37 UTC 2021 1045 mdate Tue Nov 23 23:24:37 UTC 2021 1046 who thorpej 1047 file src/tests/lib/libexecinfo/Makefile: 1.8 1048 file src/tests/lib/libexecinfo/t_sig_backtrace: 1.2 1049 descr Unit test fails to pass unless t_sig_backtrace.c is compiled 1050 with -fno-omit-frame-pointer and -DNOINLINE_HACK. 1051 kcah 1052 1053 hack alpha gcc error in lint 1054 cdate 2022/04/10 13:21:34 1055 who martin 1056 port alpha 1057 file usr.bin/xlint/Makefile.inc: 1.23 1058 pr 56789 1059 descr 1060 Compiling lint with -ftrapv fails with an internal 1061 gcc compiler error. 1062 1063 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105209 1064 kcah 1065 1066 hack compile copy{in,out}() for ibm4xx with -O0 for clang 1067 cdate Mon Sep 12 08:06:36 UTC 2022 1068 who rin 1069 port evbppc 1070 file sys/arch/powerpc/ibm4xx/trap.c: 1.99 1071 descr 1072 clang 13.0.0 miscompiles copy{in,out}() with -O[12]. As a result, 1073 kernel cannot execute /sbin/init. 1074 kcah 1075
Indexes created Wed Nov 05 19:10:08 GMT 2025