HACKS revision 1.235
1 # $NetBSD: HACKS,v 1.235 2023/01/22 20:41:25 christos 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 gcc10/vax ICE 426 cdate Sun Jan 22 15:37:56 EST 2023 427 who christos 428 file external/mit/xorg/lib/fontconfig/src/Makefile : 1.28 429 descr 430 Disable optimization on some files 431 kcah 432 433 hack gcc4/vax ICE 434 cdate Sat Dec 22 08:17:57 2007 UTC 435 who tsutsui 436 file sys/arch/vax/conf/Makefile.vax : 1.79 437 descr 438 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 439 -fno-tree-ter prevents it so add it to COPTS. 440 kcah 441 442 hack gcc4/vax compiler crash 443 cdate Fri Jun 30 22:39:12 PDT 2006 444 who mrg 445 file bin/csh/Makefile : 1.27 446 file lib/i18n_module/UTF7/Makefile : 1.2 447 descr 448 GCC4 on vax crashes. -O0 stops it happening so far... 449 kcah 450 451 hack declare boolean_t in two IPF user-mode programs 452 cdate Tue Mar 7 19:19:20 CET 2006 453 who he 454 file dist/ipf/ipsend/iptests.c : 1.8 455 dist/ipf/ipsend/sock.c : 1.7 456 descr 457 The IPF user-mode programs ipsend and iptest first 458 include <sys/types.h> without _KERNEL defined, and 459 later include <sys/file.h> with _KERNEL defined. 460 This causes a build failure when building for vax, 461 since <sys/device.h> ends up being included without 462 bollean_t being defined by <sys/types.h>. 463 Build failure and further details documented in 464 PR#32907. 465 kcah 466 467 hack pcc 0.9.9 large string literals 468 cdat 8 July 2008 469 who gmcgarry 470 file sys/conf/param.c : 1.58 471 descr 472 Workaround for pcc 0.9.9 not handling large string literals 473 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 474 fail compilation. 475 There is a proposal on the pcc mailing list to stuff config 476 file in ELF section. 477 kcah 478 479 hack xorg warnings 480 cdat 30 July 2008, 3 June, 2013 481 who mrg 482 file external/mit/xorg/lib/libSM/Makefile : 1.2 483 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 484 external/mit/xorg/lib/libXext/Makefile : 1.2 485 external/mit/xorg/lib/libXfont/Makefile : 1.2 486 descr 487 Disable several warnings or use -Wno-error across Xorg sources 488 while we get them working 489 kcah 490 491 hack 32 bit time leftovers 492 cdat 11 January 2009 493 who christos 494 file lib/libc/time/localtime.c : 1.41 495 lib/libc/time/zic.c : 1.23 496 descr 497 The timezone compiled files still contain 32 bit time_t 498 quantities. I did not want to version the files because 499 the ``parser'' is too ugly for words. What needs to be 500 done, is to rewrite the parser from scratch also to avoid 501 potential core-dumps from parsing invalid files. 502 kcah 503 504 hack 32 bit time leftovers 505 cdat 11 January 2009 506 who christos 507 file various 508 descr 509 Many filesystem on-disk formats have 32 bit times. 510 kcah 511 512 hack gcc 4.5 fsdb miscompile 513 date Sat Nov 9 11:03:02 EST 2013 514 who christos 515 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 516 descr 517 src/sbin/fsdb/fsdb.c: In function 'findblk': 518 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 519 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 520 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 521 (const_int 8 [0x8])) 522 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 523 -1 (nil)) 524 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 525 extract_insn, at recog.c:2103 526 kcah 527 528 hack gcc 4.8 gcc miscompiles 529 date Sat Nov 9 16:35:18 EST 2013 530 who christos 531 file distrib/utils/x_ping/Makefile : 1.8 532 file distrib/vax/miniroot/Makefile.inc : ? 533 file distrib/vax/ramdisk/Makefile : ? 534 file external/gpl3/gdb/lib/libdecnumber/Makefile : 1.3 535 file sbin/fsdb/Makefile : 1.36 536 file sbin/newfs_ext2fs/Makefile : 1.6 537 file sbin/ping/Makefile : 1.17 538 file usr.sbin/mtrace/Makefile : 1.11 539 descr 540 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 541 internal compiler error: in change_address_1, at emit-rtl.c:2019 542 external/gpl3/gcc/dist/gcc/recog.c:770:1: 543 internal compiler error: in change_address_1, at emit-rtl.c:2019 544 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 545 internal compiler error: in change_address_1, at emit-rtl.c:2019 546 sbin/ping/ping.c:679:1: 547 internal compiler error: in change_address_1, at emit-rtl.c:2019 548 sbin/newfs_ext2fs/mke2fs.c:681:1: 549 internal compiler error: in reload_combine_note_use, 550 at postreload.c:1561 551 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 552 internal compiler error: in change_address_1, at emit-rtl.c:2019 553 usr.sbin/mtrace/mtrace.c:1655:1: 554 internal compiler error: in change_address_1, at emit-rtl.c:2019 555 kcah 556 557 hack gcc 5.4 cc1 miscompile 558 date Tue Feb 14 07:19:57 JST 2017 559 who rin 560 pr port-vax/51967 561 file external/gpl3/gcc/usr.bin/backend/Makefile : 1.35 562 descr 563 cc1 aborts due to SIGILL when compiling the sample code attached 564 to the PR. As a workaround, compile dse.c with -O0. 565 kcah 566 567 hack libssh miscompile 568 cdate Tue Feb 14 17:58:06 JST 2017 569 mdate Tue Feb 14 18:57:39 JST 2017 570 who rin 571 file crypto/external/bsd/openssh/lib/Makefile : 1.20 572 descr 573 poly1305.c and umac.c are miscompiled, which results in login 574 failure to/from external hosts via ssh. 575 kcah 576 577 hack mandoc miscompile 578 date Tue Feb 14 18:03:05 JST 2017 579 who rin 580 file external/bsd/mdocml/lib/libmandoc/Makefile : 1.8 581 descr 582 mandoc(1) receives SIGILL in in_line_argn() from mdoc_macro.c. 583 kcah 584 585 hack libX11 miscompile 586 date Thu Feb 16 10:00:22 JST 2017 587 who rin 588 file src/external/mit/xorg/lib/libX11/Makefile.libx11 : 1.18 589 descr 590 lcWrap.c is miscompiled, which results in input failure via XIM. 591 Besides, some clients, e.g., pkgsrc/x11/kterm, receive SIGSEGV. 592 kcah 593 594 hack gomoku compiler crash 595 date Tue May 31 15:11:39 EDT 2022 596 who christos 597 file src/games/gomoku/Makefile : 1.12 598 descr 599 pickmove.c crashes with -O2, warns about ovi.o_intersect being 600 unitialized with -O1, works with -O0 601 kcah 602 603 hack gdtoa/misc.c miscompile 604 cdate Sun Dec 4 22:27:26 UTC 2022 605 who jakllsch 606 file src/lib/libc/gdtoa/Makefile.inc : 1.11 607 descr 608 some doubles print as garbage if gdtoa/misc.c isn't compiled at -O0 609 kcah 610 611 port arm 612 613 hack gcc-unsigned-compare 614 cdate 09 Mar 2002 615 mdate 18 Mar 2002 616 who bjh21 617 file dist/bind/lib/nameser/ns_parse.c : 1.3 618 file dist/dhcp/minires/ns_parse.c : 1.3 619 file dist/dhcp/omapip/result.c : 1.2 620 file dist/dhcp/server/failover.c : 1.3 621 file gnu/dist/toolchain/bfd/bfd.c : 1.2 622 file gnu/dist/toolchain/bfd/format.c : 1.2 623 file gnu/dist/toolchain/gdb/target.c : 1.2 624 file sys/kern/vfs_subr.c : 1.172 625 descr When checking that a potentially-unsigned enum is >= 0, assign 626 it to an int first. This is necessary to avoid "comparison is 627 always true" warnings with -fshort-enums. Casting to an int 628 really should be enough, but turns out not to be. 629 kcah 630 631 hack gcc-4.5 arm CNAME hostname lookup failure on 632 certain DNS environment (probably -ftree-ter problem) 633 cdate Sat Dec 24 04:59:00 UTC 2011 634 mdate 635 who tsutsui 636 file lib/libc/net/Makefile.inc 1.79 637 descr Hostname lookup against CNAMEs by some commands fails 638 on certain DNS environments if lib/libc/net/gethnamaddr.c 639 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 640 are compiled with -O2, even though nslookup(1) against 641 the same CNAME returns proper hostname. 642 They works properly if compiled with -O2 -fno-tree-ter. 643 Also -O2 fails but -O2 -fno-tree-ter works on the following 644 test case in gcc bugzilla: 645 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 646 kcah 647 648 port sh3 649 650 hack gcc4-sh3-bz2 651 cdate Sun May 21 03:34:57 UTC 2006 652 mdate Fri May 16 13:13:00 UTC 2008 653 who mrg, tsutsui 654 file lib/libbz2/Makefile : 1.10 655 descr 656 The in-tree GCC 4.1-based compiler generated too-far 657 pc-relative addresses. Hack is to build with 658 -fno-loop-optimize. 659 kcah 660 661 port m68000 662 663 hack gcc4-m68000 664 cdate Fri Feb 8 10:29:37 PST 2008 665 mdate Sun May 4 15:37:19 UTC 2008 666 who mrg, tsutsui 667 file rescue/Makefile : 1.21 668 file sbin/dump_lfs/Makefile : 1.9 669 file sbin/fsck_ffs/Makefile : 1.35 670 file sbin/fsdb/Makefile : 1.22 671 file share/mk/sys.mk : 1.96 672 file usr.sbin/ndbootd/Makefile : 1.5 673 descr 674 Several internal compiler errors with gcc -O1 675 around 64bit integer arithmetic. 676 This hack uses -O1 and adds some -fno-tree-foo options 677 to avoid the problem. 678 This might be related with GCC Bugzilla Bug 32424. 679 kcah 680 681 port m68k,sh3,vax 682 683 hack gcc-4.8.1 684 cdate Wed Nov 6 20:41:35 EST 2013 685 who christos 686 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 687 descr 688 compile hashtable_c++0x.cc with -O2 instead of -Os to 689 produce missing instantiation of std::lower_bound expansion 690 for unsigned long. 691 kcah 692 693 port sparc 694 695 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 696 cdate Sun Aug 14 19:26:48 PDT 2011 697 who mrg 698 file sys/arch/sparc64/sparc/cpu.c : 1.234 699 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 700 file sys/arch/sparc64/sparc/genassym.cf : 1.67 701 file sys/arch/sparc64/sparc/locore.s : 1.265 702 descr 703 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 704 Post newlock2 there was a bug where a lock was reduced from 705 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 706 would crash due to NULL IPI. This was fixed by re-using the 707 right IPL value. However, GCC 4.5.3 build kernels have the 708 same problems. For now, the hack is re-instated. 709 kcah 710 711 712 port mips 713 714 hack mips-shared-linker-load-address 715 cdate Fri Oct 7 08:33:10 UTC 2005 716 who simonb 717 file src/sys/kern/exec_elf32.c : 1.107 718 descr 719 With COMPAT_16 or previous enabled (which enables 720 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 721 load and run at address 0. The check to fix this in 722 rev 1.107 only checks the first psection of the ELF 723 executable, which may not be loadable. A more correct 724 fix is to check the first loadable psection instead of 725 just the first psection. 726 kcah 727 728 hack mips-duplicate-ras-end-label 729 cdate Sat Sep 2 23:29:42 2006 730 who martin 731 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 732 descr 733 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 734 labels by duplicated __asm output from RAS_END() 735 macro. 736 kcah 737 738 hack mips-mcount-assembler-warning 739 cdate Tue Jul 29 14:16:52 UTC 2008 740 who lukem 741 file src/lib/libc/gmon/Makefile.inc : 1.8 742 descr 743 Workaround for PR port-mips/39192. 744 common/lib/libc/gmon/mcount.c generates a (fatal) 745 assembler warning on MIPS: 746 Warning: No .cprestore pseudo-op used in PIC code 747 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 748 kcah 749 750 port i386 751 752 hack use volatile intermediate variable to enforce rounding 753 cdate Tue Aug 1 22:15:55 MEST 2006 754 who drochner 755 file src/lib/libm/src/lrintf.c : 1.4 756 file src/lib/libm/src/s_rintf.c : 1.8 757 descr 758 gcc-4 does subsequent operations on "float" values within 759 the i387 FPU without rounding the intermediate results 760 kcah 761 762 port x86 763 hack turn off optimization for biosdisk_ll.c because otherwise 764 we are pass the wrong arguments to biosdisk_read(). 765 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 766 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 767 cdate Mon Apr 7 21:09:55 2014 UTC 768 who christos 769 file src/sys/arch/i386/stand/lib/Makefile : 1.38 770 descr 771 Turning on DISK_DEBUG shows the problem. We should find 772 out which option is causing this. 773 hcah 774 775 port powerpc 776 777 hack avoid using __builtin_return_address(0) because it fails in 778 Xorg's module loader 779 cdate Sat Sep 27 03:52:05 UTC 2008 780 who macallan 781 file src/libexec/ld.elf_so/rtld.c : 1.121 782 descr 783 workaround for PR port-macppc/37812 784 kcah 785 786 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 787 building the native compiler via build.sh those don't defined 788 properly. 789 cdate Sat Mar 12 08:00:00 UTC 2011 790 who matt 791 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h : 1.7 792 descr 793 see above 794 kcah 795 796 port powerpc64 797 798 hack include _errno.c in libposix so that __errno resolves. It 799 should resolve from libc's errno, but somehow it does not. 800 Linker bug? 801 cdate Thu Oct 27 13:19:47 EDT 2011 802 who christos 803 file src/lib/libposix/Makefile: 1.15 804 file src/lib/librt/Makefile: 1.14 805 descr 806 workaround for: 807 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 808 R_PPC64_REL24 relocation against symbol `.__errno' 809 kcah 810 811 hack rename data() function in mdocml to avoid redefined error. 812 Compiler/Assembler bug? 813 cdate Sat Oct 29 11:16:01 EDT 2011 814 who christos 815 file src/external/bsd/mdocml/tbl_data.c: 1.2 816 descr 817 workaround for: 818 {standard input}: Assembler messages: 819 {standard input}:105: Error: symbol `.data' is already \ 820 defined 821 kcah 822 823 port emips 824 825 hack Add nop between ctc1 and mtc0 to avoid assembler internal 826 error 827 cdate Sat Oct 29 16:57:34 EDT 2011 828 who christos 829 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 830 descr 831 workaround for: 832 {standard input}: Assembler messages: 833 {standard input}:730: Internal error! 834 Assertion failure in append_insn at /usr/src/external/gpl3/\ 835 binutils/dist/gas/config/tc-mips.c line 2910. 836 kcah 837 838 port ia64 839 840 hack libgcc unwind dummy function 841 cdate Fri Apr 17 14:31:03 CEST 2015 842 who martin 843 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 844 descr 845 Add an empty _Unwind_FindTableEntry() implementation. 846 In the end we will use our libc stuff, and this should 847 go away again. 848 kcah 849 850 port x68k 851 852 hack compiler error with gcc 4.5.x 853 cdate Fri May 24 13:23:01 EDT 2013 854 who christos 855 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 856 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 857 descr 858 workaround for: 859 internal compiler error: in cselib_record_set, at cselib.c:1999 860 kcah 861 862 hack fallback to /usr/bin/clang-cpp in rpcgen 863 cdate Wed Jun 5 15:49:27 CEST 2013 864 who joerg 865 file src/usr.bin/rpcgen/rpc_main.c : 1.35 866 descr 867 It is undecided which compiler owns /usr/bin/cpp and whether it should 868 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 869 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 870 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 871 kcah 872 873 port hppa 874 875 hack compiler error with gcc 4.5.x 876 cdate Tue Jul 23 07:42:28 BST 2013 877 who skrll 878 file src/sys/lib/libkern/Makefile.libkern: 1.26 879 descr 880 workaround for unanalysed codegen bug affecting md5c.c. 881 kcah 882 883 hack gdb vs _rtld_debug_state problem 884 cdate Thu Mar 5 09:49:53 UTC 2015 885 who skrll 886 file src/libexec/ld.elf_so/rtld.c: 1.175 887 descr 888 workaround for problem where gdb misses the breakpoint on 889 _rtld_debug_state when the function is only the 890 bv,n %r0(%rp) instruction - the nullify seems to 891 confuse something 892 kcah 893 894 port mips64* 895 hack compiler crashes on mips64* with optimization enabled 896 cdate Tue May 13 18:46:48 UTC 2014 897 who macallan 898 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 899 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 900 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 901 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 902 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 903 pr 48696 904 kcah 905 906 port vax 907 hack compile boot with -O1 908 cdate Sat May 24 09:40:58 CEST 2014 909 who martin 910 file src/sys/arch/vax/boot/boot/Makefile: 1.41 911 descr /boot does not work when compiled with -O2 and gcc 4.8 912 kcah 913 914 port vax 915 hack compile nir.c in gallium with -O1 916 cdate Mon Oct 28 14:39:35 EDT 2019 917 who christos 918 file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 919 descr gallium does not compile. 920 kcah 921 922 port sh3 923 hack compile parse.c in battlestar with -Wno-restrict 924 cdate Mon Oct 28 14:39:35 EDT 2019 925 who christos 926 file /cvsroot/src/games/battlestar/Makefile 1.11 927 descr fails to compile, confused by char words[][]; 928 strcpy(words[n - 1], words[n + 1]); 929 kcah 930 931 port sh3 932 hack compile ddns.c in dhcpcd with no-stringop-overflow 933 cdate Tue Oct 29 20:25:59 EDT 2019 934 who christos 935 file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 936 descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 937 kcah 938 939 port arm 940 hack avoid using labels in a 12-bit constant. 941 cdate Mon Mar 30 05:26:47 2015 UTC 942 who matt 943 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 944 descr workaround for clang misassembling an instruction 945 kcah 946 947 port sparc64 948 hack during profiling with -m32 (and ASLR) labels are not generated 949 consistently 950 cdate Sat Feb 11 04:56:37 2017 UTC 951 who christos 952 file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 953 desc asn1_krb5_asn1.po does not produce the same results during successive 954 compilation runs; it is bimodal. Turning optimization to -O0 fixes 955 the issue 956 kcah 957 958 port ia64 959 hack ski emulator crashes 960 cdate Sat Apr 8 18:10:43 2017 UTC 961 who scole 962 file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 963 desc 964 ski emulator crashes during acpi detection. Added a check for 965 uninitialized index. Submitted a request for change with upstream 966 mailing list, but never got a response 967 kcah 968 969 port vax 970 hack compile rtld.c with -O0 971 cdate Wed Apr 3 17:38:38 EDT 2019 972 who christos 973 file src/libexec/ld.elf_so/Makefile: 1.141 974 descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 975 second pass loop with elm == 0xffffffff 976 kcah 977 978 port powerpc 979 hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 980 cdate Wed Jan 29 17:40:19 EST 2020 981 who christos 982 file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 983 file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 984 file src/tests/lib/libc/misc/Makefile: 1.5 985 986 descr Disable optimization on tc.c, logerr.c, ubsan.c crashes: 987 lib/libLLVMCodeGen/../../llvm/../../external/apache2/llvm/lib/..\ 988 /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \ 989 function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const" 990 kcah 991 992 port m68k 993 hack compile aes_ccm_tag() with -O0 994 cdate Mon Aug 10 06:27:29 UTC 2020 995 mdate Wed Aug 10 00:00:00 UTC 2022 996 who rin 997 file src/sys/crypto/aes/aes_ccm.c: 1.5 998 descr GCC 9.4 and 8.3 miscompile aes_ccm_tag() for m68k with optimization 999 level -O[12], which results in failure in aes_ccm_selftest(). 1000 For 9.4, -O0 and -O1 work but -O2 fails for amiga (A1200, 68060) and 1001 mac68k (Quadra 840AV, 68040). Whereas -O0 and -O2 work but -O1 fails 1002 for sun3 (TME, 68020 emulator) and sun2 (TME, 68010 emulator). 1003 aes_ccm_selftest() still fails with GCC 10.4 and -O2. 1004 kcah 1005 1006 port sh3 1007 1008 hack gcc9-sh3-lint 1009 cdate Tue Jun 22 14:59:52 CEST 2021 1010 mdate Mon Jul 5 12:34:57 CEST 2021 1011 who hgutch 1012 file external/gpl3/gcc/dist/gcc/config/sh/sh.md 1.2 1013 external/gpl3/gcc.old/dist/gcc/config/sh/sh.md 1.11 1014 descr 1015 The in-tree gcc 9/gcc 10 crashes with an internal 1016 invalid opcode exception when using any kind of 1017 optimization on lex.c in usr.bin/xlint/lint . This 1018 was introduced apparently unintendedly in gcc when 1019 addressing a different issue. Rather than disabling 1020 optimization for lex.c, instead revert the change to 1021 gcc. The bug report upstream has been updated to 1022 reflect the exact breakage. 1023 1024 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101177 1025 kcah 1026 1027 port sh3 1028 hack compile lint1/initdecl() with -O0 for sh3 (port-sh3/56311) 1029 cdate Thu Jul 15 07:58:05 UTC 2021 1030 mdate Fri Jul 16 10:00:00 UTC 2021 1031 who rin 1032 file src/usr.bin/xlint/lint1/decl.c: 1.200 1033 descr GCC 9 and 10 miscompile initdecl() due to mischoice of register, 1034 as described in the PR. Compiling this function with -O0 works 1035 around the problem. 1036 The problem has been reported to upstream as GCC Bug 101469: 1037 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101469 1038 kcah 1039 1040 port vax 1041 hack compile blake2b.c with -O0 for vax 1042 cdate Wed Oct 13 14:28:32 UTC 2021 1043 mdate Wed Oct 13 14:28:32 UTC 2021 1044 who nia 1045 file src/lib/libcrypt/Makefile: 1.200 1046 descr GCC 10 fails to build blake2b.c with an internal compiler 1047 error unless optimization is disabled. 1048 kcah 1049 1050 port arm 1051 hack compile t_sig_backtrace with -fno-omit-frame-pointer for arm 1052 cdate Tue Nov 23 23:24:37 UTC 2021 1053 mdate Tue Nov 23 23:24:37 UTC 2021 1054 who thorpej 1055 file src/tests/lib/libexecinfo/Makefile: 1.8 1056 file src/tests/lib/libexecinfo/t_sig_backtrace: 1.2 1057 descr Unit test fails to pass unless t_sig_backtrace.c is compiled 1058 with -fno-omit-frame-pointer and -DNOINLINE_HACK. 1059 kcah 1060 1061 hack alpha gcc error in lint 1062 cdate 2022/04/10 13:21:34 1063 who martin 1064 port alpha 1065 file usr.bin/xlint/Makefile.inc: 1.23 1066 pr 56789 1067 descr 1068 Compiling lint with -ftrapv fails with an internal 1069 gcc compiler error. 1070 1071 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105209 1072 kcah 1073 1074 hack compile copy{in,out}() for ibm4xx with -O0 for clang 1075 cdate Mon Sep 12 08:06:36 UTC 2022 1076 who rin 1077 port evbppc 1078 file sys/arch/powerpc/ibm4xx/trap.c: 1.99 1079 descr 1080 clang 13.0.0 miscompiles copy{in,out}() with -O[12]. As a result, 1081 kernel cannot execute /sbin/init. 1082 kcah 1083
Indexes created Wed Nov 05 22:09:55 GMT 2025