HACKS revision 1.228
1 # $NetBSD: HACKS,v 1.228 2022/04/10 19:54:57 rillig 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 port arm 587 588 hack gcc-unsigned-compare 589 cdate 09 Mar 2002 590 mdate 18 Mar 2002 591 who bjh21 592 file dist/bind/lib/nameser/ns_parse.c : 1.3 593 file dist/dhcp/minires/ns_parse.c : 1.3 594 file dist/dhcp/omapip/result.c : 1.2 595 file dist/dhcp/server/failover.c : 1.3 596 file gnu/dist/toolchain/bfd/bfd.c : 1.2 597 file gnu/dist/toolchain/bfd/format.c : 1.2 598 file gnu/dist/toolchain/gdb/target.c : 1.2 599 file sys/kern/vfs_subr.c : 1.172 600 descr When checking that a potentially-unsigned enum is >= 0, assign 601 it to an int first. This is necessary to avoid "comparison is 602 always true" warnings with -fshort-enums. Casting to an int 603 really should be enough, but turns out not to be. 604 kcah 605 606 hack gcc-4.5 arm CNAME hostname lookup failure on 607 certain DNS environment (probably -ftree-ter problem) 608 cdate Sat Dec 24 04:59:00 UTC 2011 609 mdate 610 who tsutsui 611 file lib/libc/net/Makefile.inc 1.79 612 descr Hostname lookup against CNAMEs by some commands fails 613 on certain DNS environments if lib/libc/net/gethnamaddr.c 614 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 615 are compiled with -O2, even though nslookup(1) against 616 the same CNAME returns proper hostname. 617 They works properly if compiled with -O2 -fno-tree-ter. 618 Also -O2 fails but -O2 -fno-tree-ter works on the following 619 test case in gcc bugzilla: 620 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 621 kcah 622 623 port sh3 624 625 hack gcc4-sh3-bz2 626 cdate Sun May 21 03:34:57 UTC 2006 627 mdate Fri May 16 13:13:00 UTC 2008 628 who mrg, tsutsui 629 file lib/libbz2/Makefile : 1.10 630 descr 631 The in-tree GCC 4.1-based compiler generated too-far 632 pc-relative addresses. Hack is to build with 633 -fno-loop-optimize. 634 kcah 635 636 port m68000 637 638 hack gcc4-m68000 639 cdate Fri Feb 8 10:29:37 PST 2008 640 mdate Sun May 4 15:37:19 UTC 2008 641 who mrg, tsutsui 642 file rescue/Makefile : 1.21 643 file sbin/dump_lfs/Makefile : 1.9 644 file sbin/fsck_ffs/Makefile : 1.35 645 file sbin/fsdb/Makefile : 1.22 646 file share/mk/sys.mk : 1.96 647 file usr.sbin/ndbootd/Makefile : 1.5 648 descr 649 Several internal compiler errors with gcc -O1 650 around 64bit integer arithmetic. 651 This hack uses -O1 and adds some -fno-tree-foo options 652 to avoid the problem. 653 This might be related with GCC Bugzilla Bug 32424. 654 kcah 655 656 port m68k,sh3,vax 657 658 hack gcc-4.8.1 659 cdate Wed Nov 6 20:41:35 EST 2013 660 who christos 661 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 662 descr 663 compile hashtable_c++0x.cc with -O2 instead of -Os to 664 produce missing instantiation of std::lower_bound expansion 665 for unsigned long. 666 kcah 667 668 port sparc 669 670 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 671 cdate Sun Aug 14 19:26:48 PDT 2011 672 who mrg 673 file sys/arch/sparc64/sparc/cpu.c : 1.234 674 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 675 file sys/arch/sparc64/sparc/genassym.cf : 1.67 676 file sys/arch/sparc64/sparc/locore.s : 1.265 677 descr 678 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 679 Post newlock2 there was a bug where a lock was reduced from 680 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 681 would crash due to NULL IPI. This was fixed by re-using the 682 right IPL value. However, GCC 4.5.3 build kernels have the 683 same problems. For now, the hack is re-instated. 684 kcah 685 686 687 port mips 688 689 hack mips-shared-linker-load-address 690 cdate Fri Oct 7 08:33:10 UTC 2005 691 who simonb 692 file src/sys/kern/exec_elf32.c : 1.107 693 descr 694 With COMPAT_16 or previous enabled (which enables 695 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 696 load and run at address 0. The check to fix this in 697 rev 1.107 only checks the first psection of the ELF 698 executable, which may not be loadable. A more correct 699 fix is to check the first loadable psection instead of 700 just the first psection. 701 kcah 702 703 hack mips-duplicate-ras-end-label 704 cdate Sat Sep 2 23:29:42 2006 705 who martin 706 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 707 descr 708 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 709 labels by duplicated __asm output from RAS_END() 710 macro. 711 kcah 712 713 hack mips-mcount-assembler-warning 714 cdate Tue Jul 29 14:16:52 UTC 2008 715 who lukem 716 file src/lib/libc/gmon/Makefile.inc : 1.8 717 descr 718 Workaround for PR port-mips/39192. 719 common/lib/libc/gmon/mcount.c generates a (fatal) 720 assembler warning on MIPS: 721 Warning: No .cprestore pseudo-op used in PIC code 722 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 723 kcah 724 725 port i386 726 727 hack use volatile intermediate variable to enforce rounding 728 cdate Tue Aug 1 22:15:55 MEST 2006 729 who drochner 730 file src/lib/libm/src/lrintf.c : 1.4 731 file src/lib/libm/src/s_rintf.c : 1.8 732 descr 733 gcc-4 does subsequent operations on "float" values within 734 the i387 FPU without rounding the intermediate results 735 kcah 736 737 port x86 738 hack turn off optimization for biosdisk_ll.c because otherwise 739 we are pass the wrong arguments to biosdisk_read(). 740 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 741 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 742 cdate Mon Apr 7 21:09:55 2014 UTC 743 who christos 744 file src/sys/arch/i386/stand/lib/Makefile : 1.38 745 descr 746 Turning on DISK_DEBUG shows the problem. We should find 747 out which option is causing this. 748 hcah 749 750 port powerpc 751 752 hack avoid using __builtin_return_address(0) because it fails in 753 Xorg's module loader 754 cdate Sat Sep 27 03:52:05 UTC 2008 755 who macallan 756 file src/libexec/ld.elf_so/rtld.c : 1.121 757 descr 758 workaround for PR port-macppc/37812 759 kcah 760 761 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 762 building the native compiler via build.sh those don't defined 763 properly. 764 cdate Sat Mar 12 08:00:00 UTC 2011 765 who matt 766 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h : 1.7 767 descr 768 see above 769 kcah 770 771 port powerpc64 772 773 hack include _errno.c in libposix so that __errno resolves. It 774 should resolve from libc's errno, but somehow it does not. 775 Linker bug? 776 cdate Thu Oct 27 13:19:47 EDT 2011 777 who christos 778 file src/lib/libposix/Makefile: 1.15 779 file src/lib/librt/Makefile: 1.14 780 descr 781 workaround for: 782 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 783 R_PPC64_REL24 relocation against symbol `.__errno' 784 kcah 785 786 hack rename data() function in mdocml to avoid redefined error. 787 Compiler/Assembler bug? 788 cdate Sat Oct 29 11:16:01 EDT 2011 789 who christos 790 file src/external/bsd/mdocml/tbl_data.c: 1.2 791 descr 792 workaround for: 793 {standard input}: Assembler messages: 794 {standard input}:105: Error: symbol `.data' is already \ 795 defined 796 kcah 797 798 port emips 799 800 hack Add nop between ctc1 and mtc0 to avoid assembler internal 801 error 802 cdate Sat Oct 29 16:57:34 EDT 2011 803 who christos 804 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 805 descr 806 workaround for: 807 {standard input}: Assembler messages: 808 {standard input}:730: Internal error! 809 Assertion failure in append_insn at /usr/src/external/gpl3/\ 810 binutils/dist/gas/config/tc-mips.c line 2910. 811 kcah 812 813 port ia64 814 815 hack libgcc unwind dummy function 816 cdate Fri Apr 17 14:31:03 CEST 2015 817 who martin 818 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 819 descr 820 Add an empty _Unwind_FindTableEntry() implementation. 821 In the end we will use our libc stuff, and this should 822 go away again. 823 kcah 824 825 port x68k 826 827 hack compiler error with gcc 4.5.x 828 cdate Fri May 24 13:23:01 EDT 2013 829 who christos 830 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 831 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 832 descr 833 workaround for: 834 internal compiler error: in cselib_record_set, at cselib.c:1999 835 kcah 836 837 hack fallback to /usr/bin/clang-cpp in rpcgen 838 cdate Wed Jun 5 15:49:27 CEST 2013 839 who joerg 840 file src/usr.bin/rpcgen/rpc_main.c : 1.35 841 descr 842 It is undecided which compiler owns /usr/bin/cpp and whether it should 843 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 844 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 845 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 846 kcah 847 848 port hppa 849 850 hack compiler error with gcc 4.5.x 851 cdate Tue Jul 23 07:42:28 BST 2013 852 who skrll 853 file src/sys/lib/libkern/Makefile.libkern: 1.26 854 descr 855 workaround for unanalysed codegen bug affecting md5c.c. 856 kcah 857 858 hack gdb vs _rtld_debug_state problem 859 cdate Thu Mar 5 09:49:53 UTC 2015 860 who skrll 861 file src/libexec/ld.elf_so/rtld.c: 1.175 862 descr 863 workaround for problem where gdb misses the breakpoint on 864 _rtld_debug_state when the function is only the 865 bv,n %r0(%rp) instruction - the nullify seems to 866 confuse something 867 kcah 868 869 port mips64* 870 hack compiler crashes on mips64* with optimization enabled 871 cdate Tue May 13 18:46:48 UTC 2014 872 who macallan 873 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 874 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 875 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 876 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 877 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 878 pr 48696 879 kcah 880 881 port vax 882 hack compile boot with -O1 883 cdate Sat May 24 09:40:58 CEST 2014 884 who martin 885 file src/sys/arch/vax/boot/boot/Makefile: 1.41 886 descr /boot does not work when compiled with -O2 and gcc 4.8 887 kcah 888 889 port vax 890 hack compile nir.c in gallium with -O1 891 cdate Mon Oct 28 14:39:35 EDT 2019 892 who christos 893 file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 894 descr gallium does not compile. 895 kcah 896 897 port sh3 898 hack compile parse.c in battlestar with -Wno-restrict 899 cdate Mon Oct 28 14:39:35 EDT 2019 900 who christos 901 file /cvsroot/src/games/battlestar/Makefile 1.11 902 descr fails to compile, confused by char words[][]; 903 strcpy(words[n - 1], words[n + 1]); 904 kcah 905 906 port sh3 907 hack compile ddns.c in dhcpcd with no-stringop-overflow 908 cdate Tue Oct 29 20:25:59 EDT 2019 909 who christos 910 file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 911 descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 912 kcah 913 914 port arm 915 hack avoid using labels in a 12-bit constant. 916 cdate Mon Mar 30 05:26:47 2015 UTC 917 who matt 918 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 919 descr workaround for clang misassembling an instruction 920 kcah 921 922 port sparc64 923 hack during profiling with -m32 (and ASLR) labels are not generated 924 consistently 925 cdate Sat Feb 11 04:56:37 2017 UTC 926 who christos 927 file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 928 desc asn1_krb5_asn1.po does not produce the same results during successive 929 compilation runs; it is bimodal. Turning optimization to -O0 fixes 930 the issue 931 kcah 932 933 port ia64 934 hack ski emulator crashes 935 cdate Sat Apr 8 18:10:43 2017 UTC 936 who scole 937 file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 938 desc 939 ski emulator crashes during acpi detection. Added a check for 940 uninitialized index. Submitted a request for change with upstream 941 mailing list, but never got a response 942 kcah 943 944 port vax 945 hack compile rtld.c with -O0 946 cdate Wed Apr 3 17:38:38 EDT 2019 947 who christos 948 file src/libexec/ld.elf_so/Makefile: 1.141 949 descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 950 second pass loop with elm == 0xffffffff 951 kcah 952 953 port powerpc 954 hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 955 cdate Wed Jan 29 17:40:19 EST 2020 956 who christos 957 file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 958 file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 959 file src/tests/lib/libc/misc/Makefile: 1.5 960 961 descr Disable optimization on tc.c, logerr.c, ubsan.c crashes: 962 lib/libLLVMCodeGen/../../llvm/../../external/apache2/llvm/lib/..\ 963 /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \ 964 function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const" 965 kcah 966 967 port m68k 968 hack compile aes_ccm_tag() with -O0 for GCC8 and GCC9 969 cdate Mon Aug 10 06:27:29 UTC 2020 970 mdate Mon Oct 5 22:00:00 JST 2020 971 who rin 972 file src/sys/crypto/aes/aes_ccm.c: 1.5 973 descr GCC 9.4 and 8.3 miscompile aes_ccm_tag() for m68k with optimization 974 level -O[12], which results in failure in aes_ccm_selftest(). 975 For 9.4, -O0 and -O1 work but -O2 fails for amiga (A1200, 68060) and 976 mac68k (Quadra 840AV, 68040). Whereas -O0 and -O2 work but -O1 fails 977 for sun3 (TME, 68020 emulator) and sun2 (TME, 68010 emulator). 978 kcah 979 980 port sh3 981 982 hack gcc9-sh3-lint 983 cdate Tue Jun 22 14:59:52 CEST 2021 984 mdate Mon Jul 5 12:34:57 CEST 2021 985 who hgutch 986 file external/gpl3/gcc/dist/gcc/config/sh/sh.md 1.2 987 external/gpl3/gcc.old/dist/gcc/config/sh/sh.md 1.11 988 descr 989 The in-tree gcc 9/gcc 10 crashes with an internal 990 invalid opcode exception when using any kind of 991 optimization on lex.c in usr.bin/xlint/lint . This 992 was introduced apparently unintendedly in gcc when 993 addressing a different issue. Rather than disabling 994 optimization for lex.c, instead revert the change to 995 gcc. The bug report upstream has been updated to 996 reflect the exact breakage. 997 998 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101177 999 kcah 1000 1001 port sh3 1002 hack compile lint1/initdecl() with -O0 for sh3 (port-sh3/56311) 1003 cdate Thu Jul 15 07:58:05 UTC 2021 1004 mdate Fri Jul 16 10:00:00 UTC 2021 1005 who rin 1006 file src/usr.bin/xlint/lint1/decl.c: 1.200 1007 descr GCC 9 and 10 miscompile initdecl() due to mischoice of register, 1008 as described in the PR. Compiling this function with -O0 works 1009 around the problem. 1010 The problem has been reported to upstream as GCC Bug 101469: 1011 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101469 1012 kcah 1013 1014 port vax 1015 hack compile blake2b.c with -O0 for vax 1016 cdate Wed Oct 13 14:28:32 UTC 2021 1017 mdate Wed Oct 13 14:28:32 UTC 2021 1018 who nia 1019 file src/lib/libcrypt/Makefile: 1.200 1020 descr GCC 10 fails to build blake2b.c with an internal compiler 1021 error unless optimization is disabled. 1022 kcah 1023 1024 port arm 1025 hack compile t_sig_backtrace with -fno-omit-frame-pointer for arm 1026 cdate Tue Nov 23 23:24:37 UTC 2021 1027 mdate Tue Nov 23 23:24:37 UTC 2021 1028 who thorpej 1029 file src/tests/lib/libexecinfo/Makefile: 1.8 1030 file src/tests/lib/libexecinfo/t_sig_backtrace: 1.2 1031 descr Unit test fails to pass unless t_sig_backtrace.c is compiled 1032 with -fno-omit-frame-pointer and -DNOINLINE_HACK. 1033 kcah 1034 1035 hack alpha gcc error in lint 1036 cdate 2022/04/10 13:21:34 1037 who martin 1038 port alpha 1039 file usr.bin/xlint/Makefile.inc: 1.23 1040 pr 56789 1041 descr 1042 Compiling lint with -ftrapv fails with an internal 1043 gcc compiler error. 1044 1045 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105209 1046 kcah 1047
Indexes created Wed Nov 05 21:10:10 GMT 2025