HACKS revision 1.204
1 # $NetBSD: HACKS,v 1.204 2020/04/30 12:35:01 rin Exp $ 2 # 3 # This file is intended to document workarounds for currently unsolved 4 # (mostly) compiler bugs. 5 # 6 # Format: 7 # hack title 8 # cdate creation date 9 # mdate mod date 10 # who responsible developer 11 # port ... 12 # affected ports, space separated, if not "all" 13 # file affected file : revision : line from : line to 14 # affected files and revision and line numbers describing hack 15 # multiple lines if necessary. 16 # pr NNNN ... 17 # problem reports this hack works around, if known. Space 18 # separated. 19 # regress src/regress/directory/where/test/found 20 # regression test directories, if available. 21 # descr 22 # insert short informal description (multi-line). (Longer ones 23 # should be in the PR database. More formal descriptions might 24 # be in the regress tree. See above). 25 # kcah 26 # closing bracket. 27 # 28 # this is a comment. 29 30 hack static linking with libpthread 31 mdate 7 May 2019 32 who maya 33 file lib/libpthread/Makefile 1.92 -> 1.94 34 descr 35 To avoid some libc thread stub functions being picked up 36 in static builds, link pthread as one section. 37 kcah 38 39 hack gcc-5.3 optimizes memset+malloc -> calloc inside calloc 40 mdate 4 May 2016 41 who christos 42 file external/gpl2/lib/libmalloc/lib/Makefile 1.3 -> 1.5 43 descr 44 resulting in infinite recursion; we prevent this with 45 -fno-builtin-malloc 46 kcah 47 48 hack turn off tree-vrp for parts of ufs_lookup.c 49 mdate 28 April 2016 50 who mrg christos 51 file src/sys/ufs/ufs/ufs_lookup.c : 1.144 52 pr 51094 53 descr 54 with -ftree-vrp enabled in ufs_lookup.c sometimes bad dir 55 panicks are see. 56 hcah 57 58 hack netstat ieee1394 address printing. 59 mdate 14 Nov 2000 60 who matt 61 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 62 descr 63 Because the current implementation of IP over IEEE1394, the 64 fw device address contains more than just the IEEE1394 EUI-64. 65 So when printing out IEEE1394 addresses, ignore the extra stuff. 66 kcah 67 68 hack xterm vs. libterm 69 mdate 01 Aug 2000 70 who jdc 71 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 72 pr 10383 73 descr 74 In order to extend the termcap string over 1023 bytes, a ZZ entry was 75 introduced to point to a memory location containing the full entry. 76 Without this hack, xterm will export a termcap containing the ZZ 77 entry, which will then be ignored by libterm. As xterm modifies the 78 exported termcap, this would cause those modifications to be ignored. 79 kcah 80 81 hack wi-at-big-endian-bus 82 cdate 15 Mar 2002 83 who martin 84 file dev/ic/wireg.h : 1.20 85 descr Add an option to access the underlying bus in big endian byte order 86 to work around deficiencies in bus_space_{read,write}_* macros. 87 Those don't allow the implementation of a proper pcmcia bus space 88 tag. 89 kcah 90 91 hack specific knowledge of colours in curses code 92 cdate Sun Apr 6 11:05:24 BST 2003 93 who jdc 94 file lib/libcurses/color.c : r1.24 95 descr 96 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 97 Fix is to enhance libtermcap to understand terminfo-style % sequences. 98 See also: 99 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 100 kcah 101 102 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 103 cdate 21 Aug 2003 104 who he 105 file sys/miscfs/procfs/procfs_linux.c : 1.14 106 descr 107 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 108 literals/constants, but refer to variables of a type which is 109 not "unsigned long", causing compilation of procfs_linux.c to 110 fail with "makes integer from pointer without a cast". This 111 is observed on e.g. the sun3 port. Ideally the "types" for 112 symbols should be consistent across all ports. 113 kcah 114 115 hack gcc4 wrong uninitialized variable 116 mdate 10 May 2006 117 who mrg 118 file bin/ksh/eval.c : 1.6 119 file bin/sh/histedit.c : 1.39 120 file bin/sh/parser.c : 1.60 121 file crypto/dist/heimdal/kdc/524.c : 1.10 122 file crypto/dist/ssh/sftp.c : 1.20 123 file crypto/dist/ssh/ssh-keysign.c : 1.11 124 file dist/ipf/lib/hostname.c : 1.2 125 file dist/ipf/tools/ipmon.c : 1.8 126 file dist/ntp/ntpd/ntp_request.c : 1.4 127 file dist/ntp/ntpd/refclock_shm.c : 1.4 128 file dist/ntp/sntp/timing.c : 1.3 129 file dist/pppd/pppstats/pppstats.c : 1.3 130 file dist/tcpdump/print-zephyr.c : 1.5 131 file distrib/utils/sysinst/aout2elf.c : 1.12 132 file gnu/libexec/uucp/uucico/uucico.c : 1.6 133 file lib/libc/citrus/citrus_csmapper.c : 1.6 134 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 135 file lib/libc/inet/inet_cidr_ntop.c : 1.3 136 file lib/libc/inet/inet_ntop.c : 1.3 137 file lib/libc/stdio/vfwprintf.c : 1.8 138 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 139 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 140 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 141 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 142 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 143 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 144 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 145 file sbin/fsck_ext2fs/dir.c : 1.19 146 file sbin/routed/rtquery/rtquery.c : 1.18 147 file sys/arch/amd64/amd64/pmap.c : 1.26 148 file sys/arch/i386/pci/piixpcib.c : 1.4 149 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 150 file sys/crypto/cast128/cast128.c : 1.9 151 file sys/ddb/db_command.c : 1.86 152 file sys/dev/cardbus/cardbus_map.c : 1.21 153 file sys/dev/fss.c : 1.25 154 file sys/dev/ic/igsfb.c : 1.39 155 file sys/dev/ic/mb86950.c : 1.5 156 file sys/dev/ic/midway.c : 1.71 157 file sys/dev/kttcp.c : 1.18 158 file sys/dev/rasops/rasops_bitops.h : 1.9 159 file sys/dev/pci/cmpci.c : 1.31 160 file sys/dev/pci/machfb.c : 1.45 161 file sys/dev/usb/ohci.c : 1.174 162 file sys/dev/usb/uhci.c : 1.196 163 file sys/dev/rasops/rasops_bitops.h : 1.9 164 file sys/dist/ipf/netinet/ip_nat.c : 1.10 165 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 166 file sys/dist/pf/net/pf.c : 1.22 167 file sys/fs/udf/udf_vnops.c : 1.4 168 file sys/kern/kern_sig.c : 1.219 169 file sys/kern/tty.c : 1.181 170 file sys/net/bpf.c : 1.116 171 file sys/net/zlib.c : 1.26 172 file sys/netccitt/if_x25subr.c : 1.37 173 file sys/netinet/in.c : 1.107 174 file sys/netsmb/smb_smb.c : 1.27 175 file sys/netsmb/smb_trantcp.c : 1.22 176 file sys/nfs/nfs_serv.c : 1.108 177 file sys/nfs/nfs_socket.c : 1.129 178 file sys/nfs/nfs_syscalls.c : 1.91 179 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 180 file usr.bin/ftp/ftp.c : 1.140 181 file usr.bin/find/function.c : 1.54 182 file usr.bin/mail/tty.c : 1.20 183 file usr.bin/msgc/msg_sys.def : 1.33-1.34 184 file usr.bin/nl/nl.c : 1.7 185 file usr.bin/systat/keyboard.c : 1.23 186 file usr.bin/usbhidctl/usbhid.c : 1.29 187 file usr.bin/vi/cl/cl_read.c : 1.5 188 file usr.bin/vi/ex/ex_cscope.c : 1.12 189 file usr.bin/vi/ex/ex_tag.c : 1.19 190 file usr.bin/vi/vi/v_txt.c : 1.15 191 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 192 file usr.sbin/cron/do_command.c : 1.19 193 file usr.sbin/timed/timed/slave.c : 1.15 194 descr 195 GCC 4.1 gets many uninitialised variable warnings wrong. We should 196 really audit all the old hacks like this when older compilers are 197 removed from the tree, as many are probably no longer required. 198 The problem is that it does not recognize initialization via function 199 call pointer. I.e. 200 int p; 201 foo(&p); 202 does not mark p as initialized. 203 kcah 204 205 hack gcc4 pointer sign and strict aliasing problems 206 mdate 10 May 2006 207 who mrg 208 file bin/ed/Makefile : 1.33 209 file distrib/utils/sysinst/Makefile.inc : 1.44 210 file distrib/utils/x_dhclient/Makefile : 1.15 211 file games/bcd/Makefile : 1.5 212 file games/dab/Makefile : 1.5 213 file games/larn/Makefile : 1.17 214 file games/pom/Makefile : 1.5 215 file lib/libasn1/Makefile : 1.26 216 file lib/libcrypt/Makefile : 1.17 217 file lib/libgssapi/Makefile : 1.16 218 file lib/libhdb/Makefile : 1.20 219 file lib/libkadm5clnt/Makefile : 1.21 220 file lib/libkadm5srv/Makefile : 1.25 221 file lib/libkrb5/Makefile : 1.35 222 file lib/libssh/Makefile : 1.6 223 file lib/libtelnet/Makefile : 1.26 224 file libexec/getty/Makefile : 1.14 225 file libexec/kadmind/Makefile : 1.19 226 file libexec/kpasswdd/Makefile : 1.14 227 file sbin/atactl/Makefile : 1.3 228 file sbin/cgdconfig/Makefile : 1.7 229 file sbin/clri/Makefile : 1.13 230 file sbin/dkctl/Makefile : 1.4 231 file sbin/dump/Makefile : 1.33 232 file sbin/fdisk/Makefile : 1.35 233 file sbin/fsck_ext2fs/Makefile : 1.11 234 file sbin/fsck_ffs/Makefile : 1.29 235 file sbin/fsdb/Makefile : 1.18 236 file sbin/newfs/Makefile : 1.30 237 file sbin/newfs_sysvbfs/Makefile : 1.2 238 file sbin/restore/Makefile : 1.23 239 file sbin/veriexecctl/Makefile : 1.11 240 file sys/lib/libsa/Makefile : 1.59 241 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 242 file usr.bin/awk/Makefile : 1.9 243 file usr.bin/crontab/Makefile : 1.24 244 file usr.bin/ctags/Makefile : 1.8 245 file usr.bin/gzip/Makefile : 1.10 246 file usr.bin/ssh/sftp/Makefile : 1.10 247 file usr.bin/ssh/ssh/Makefile : 1.25 248 file usr.bin/vi/build/Makefile : 1.26 249 file usr.bin/telnet/Makefile : 1.40 250 file usr.bin/tn3270/tn3270/Makefile : 1.36 251 file usr.bin/tr/Makefile : 1.4 252 file usr.sbin/amd/amd/Makefile : 1.27 253 file usr.sbin/amd/amq/Makefile : 1.14 254 file usr.sbin/amd/libamu/Makefile : 1.20 255 file usr.sbin/amd/pawd/Makefile : 1.5 256 file usr.sbin/bind/Makefile.inc : 1.22 257 file usr.sbin/bind/libdns/Makefile : 1.3 258 file usr.sbin/bind/named/Makefile : 1.17 259 file usr.sbin/bootp/bootptest/Makefile : 1.2 260 file usr.sbin/chrtbl/Makefile : 1.6 261 file usr.sbin/cron/Makefile : 1.12 262 file usr.sbin/dhcp/Makefile.inc : 1.20 263 file usr.sbin/hprop/Makefile : 1.13 264 file usr.sbin/installboot/Makefile : 1.35 265 file usr.sbin/ipf/ipftest/Makefile : 1.32 266 file usr.sbin/isdn/isdnd/Makefile : 1.6 267 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 268 file usr.sbin/isdn/isdntel/Makefile : 1.2 269 file usr.sbin/isdn/isdntrace/Makefile : 126 270 file usr.sbin/mopd/common/Makefile : 1.10 271 file usr.sbin/mopd/mopd/Makefile : 1.9 272 file usr.sbin/mopd/mopprobe/Makefile : 1.7 273 file usr.sbin/makefs/Makefile : 1.17 274 file usr.sbin/mscdlabel/Makefile : 1.5 275 file usr.sbin/pkg_install/add/Makefile : 1.7 276 file usr.sbin/pkg_install/create/Makefile : 1.5 277 file usr.sbin/pkg_install/lib/Makefile : 1.28 278 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 279 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 280 file usr.sbin/pppd/Makefile.inc : 1.3 281 file usr.sbin/pppd/pppd/Makefile : 1.38 282 file usr.sbin/rarpd/Makefile : 1.10 283 file usr.sbin/rbootd/Makefile : 1.10 284 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 285 file usr.sbin/tcpdump/Makefile : 1.42 286 descr 287 GCC 4.1 warns on pointer sign comparision/assignments and lots of 288 code does not conform. For now we use -Wno-pointer-sign and 289 -fno-strict-aliasing. 290 kcah 291 292 hack disable ctf for gcc-4.8 build 293 mdate April 3 2014 294 who christos 295 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 296 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 297 descr 298 nbctfconvert -g -L VERSION -g fold-const.o 299 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 300 ((null)) <13532> 301 kcak 302 303 hack emacs aborting on exit (libgcc issue) 304 mdate 7 November 2011 305 who christos 306 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 307 descr 308 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 309 to do just that. If the symbol requested is not found, then it aborts. 310 emacs 23.3 triggers this assertion. For now disable aborting, and 311 silently ignore. 312 kcah 313 314 hack cross-building hack on Darwin 315 mdate 20 July 2008 316 who agc 317 file src/distrib/common/Makefile.mdset : 1.33 318 descr 319 Darwin has problems with getopt() when used in mdsetimage -v, 320 due to the difference between BSD and libiberty() getopt 321 implementations, more fully described in 322 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 323 and the subsequent thread. For just now, we just have an ugly 324 workaround not to call mdsetimage with the -v argument on Darwin 325 kcah 326 327 hack avoid rebuilding asn1 libraries 328 mdate 03 August 2008 329 who veego 330 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 331 file src/lib/libasn1/Makefile : 1.32 332 file src/lib/libhdb/Makefile : 1.23 333 file src/lib/libgssapi/Makefile : 1.20 334 file src/lib/libhx509/Makefile : 1.3 335 pr 9702 39185 336 descr 337 asn1_compile does not check if generated header files do not have to 338 be rebuild. 339 Generate .hx files and copy it in the Makefiles if they changed. 340 kcah 341 342 hack Disable fortification for /usr/bin/makeinfo 343 cdata 24 Mar 2014 344 who tron 345 file src/external/gpl2/texinfo/bin/makeinfo/Makefile : 1.1 346 pr N/A 347 descr 348 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 349 it fails to process certain texinfo files, e.g. "cl.texi" 350 included in the Emacs 24.3 distribution. 351 kcah 352 353 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 354 cdata 05 Apr 2014 355 who tron 356 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 357 pr N/A 358 descr 359 If "xauth" is compile with "USE_SSP" set to "yes" it fails 360 mysteriously with an error message like this: 361 362 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 363 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 364 365 The compiler seems to get confused about the two filename variables 366 used in the link(2) system call. 367 kcah 368 369 hack g++ 5.x barfs on volatile in constexpr initializers 370 cdata 27 Aug 2015 371 who pooka 372 file src/lib/libpthread/pthread_types.h : 1.17 373 pr lib/49989 374 descr 375 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 376 in C++ results in: 377 error: temporary of non-literal type '__pthread_mutex_st' 378 in a constant expression 379 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 380 [...] 381 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 382 not literal because: 383 struct __pthread_mutex_st { 384 ^ 385 include/pthread_types.h:103:17: note: non-static data 386 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 387 pthread_spin_t ptm_errorcheck; 388 kcah 389 390 hack libm cabs{,f,l} and g++ 391 cdata 11 Jan 2016 392 who christos 393 pr lib/50646 394 file src/external/gpl3/gcc.old/dist/libstdc++-v3/include/std/complex : 1.2 395 file src/external/gpl3/gcc/dist/libstdc++-v3/include/std/complex : 1.2 396 descr 397 Our cabs and cabsf have a different argument format on some architectures 398 and for that we have created in libm/compat_cabs{,f}.c. The standard 399 versions in libc are __c99_cabs{,f,l} and there are __RENAME()'s in 400 <complex.h>. G++ uses __builtin_cabs{,f,l} to implement those and they 401 translate by default to cabs{,f,l} which gets defined to cabs{,f} (the 402 wrong function) and an undefined cabsl. I've changed <complex> to use 403 the __c99_cabs{,f,l} directly. Using the __builtin_cabs{,f,l} in gcc is 404 still broken. 405 kcah 406 407 port vax 408 409 hack gcc4/vax ICE 410 cdate Sat Dec 22 08:17:57 2007 UTC 411 who tsutsui 412 file sys/arch/vax/conf/Makefile.vax : 1.79 413 descr 414 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 415 -fno-tree-ter prevents it so add it to COPTS. 416 kcah 417 418 hack gcc4/vax compiler crash 419 cdate Fri Jun 30 22:39:12 PDT 2006 420 who mrg 421 file bin/csh/Makefile : 1.27 422 file lib/i18n_module/UTF7/Makefile : 1.2 423 descr 424 GCC4 on vax crashes. -O0 stops it happening so far... 425 kcah 426 427 hack declare boolean_t in two IPF user-mode programs 428 cdate Tue Mar 7 19:19:20 CET 2006 429 who he 430 file dist/ipf/ipsend/iptests.c : 1.8 431 dist/ipf/ipsend/sock.c : 1.7 432 descr 433 The IPF user-mode programs ipsend and iptest first 434 include <sys/types.h> without _KERNEL defined, and 435 later include <sys/file.h> with _KERNEL defined. 436 This causes a build failure when building for vax, 437 since <sys/device.h> ends up being included without 438 bollean_t being defined by <sys/types.h>. 439 Build failure and further details documented in 440 PR#32907. 441 kcah 442 443 hack pcc 0.9.9 large string literals 444 cdat 8 July 2008 445 who gmcgarry 446 file sys/conf/param.c : 1.58 447 descr 448 Workaround for pcc 0.9.9 not handling large string literals 449 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 450 fail compilation. 451 There is a proposal on the pcc mailing list to stuff config 452 file in ELF section. 453 kcah 454 455 hack xorg warnings 456 cdat 30 July 2008, 3 June, 2013 457 who mrg 458 file external/mit/xorg/lib/libSM/Makefile : 1.2 459 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 460 external/mit/xorg/lib/libXext/Makefile : 1.2 461 external/mit/xorg/lib/libXfont/Makefile : 1.2 462 descr 463 Disable several warnings or use -Wno-error across Xorg sources 464 while we get them working 465 kcah 466 467 hack 32 bit time leftovers 468 cdat 11 January 2009 469 who christos 470 file lib/libc/time/localtime.c : 1.41 471 lib/libc/time/zic.c : 1.23 472 descr 473 The timezone compiled files still contain 32 bit time_t 474 quantities. I did not want to version the files because 475 the ``parser'' is too ugly for words. What needs to be 476 done, is to rewrite the parser from scratch also to avoid 477 potential core-dumps from parsing invalid files. 478 kcah 479 480 hack 32 bit time leftovers 481 cdat 11 January 2009 482 who christos 483 file various 484 descr 485 Many filesystem on-disk formats have 32 bit times. 486 kcah 487 488 hack gcc 4.5 fsdb miscompile 489 date Sat Nov 9 11:03:02 EST 2013 490 who christos 491 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 492 descr 493 src/sbin/fsdb/fsdb.c: In function 'findblk': 494 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 495 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 496 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 497 (const_int 8 [0x8])) 498 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 499 -1 (nil)) 500 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 501 extract_insn, at recog.c:2103 502 kcah 503 504 hack gcc 4.8 gcc miscompiles 505 date Sat Nov 9 16:35:18 EST 2013 506 who christos 507 file distrib/utils/x_ping/Makefile : 1.8 508 file distrib/vax/miniroot/Makefile.inc : ? 509 file distrib/vax/ramdisk/Makefile : ? 510 file external/gpl3/gdb/lib/libdecnumber/Makefile : 1.3 511 file sbin/fsdb/Makefile : 1.36 512 file sbin/newfs_ext2fs/Makefile : 1.6 513 file sbin/ping/Makefile : 1.17 514 file usr.sbin/mtrace/Makefile : 1.11 515 descr 516 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 517 internal compiler error: in change_address_1, at emit-rtl.c:2019 518 external/gpl3/gcc/dist/gcc/recog.c:770:1: 519 internal compiler error: in change_address_1, at emit-rtl.c:2019 520 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 521 internal compiler error: in change_address_1, at emit-rtl.c:2019 522 sbin/ping/ping.c:679:1: 523 internal compiler error: in change_address_1, at emit-rtl.c:2019 524 sbin/newfs_ext2fs/mke2fs.c:681:1: 525 internal compiler error: in reload_combine_note_use, 526 at postreload.c:1561 527 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 528 internal compiler error: in change_address_1, at emit-rtl.c:2019 529 usr.sbin/mtrace/mtrace.c:1655:1: 530 internal compiler error: in change_address_1, at emit-rtl.c:2019 531 kcah 532 533 hack gcc 5.4 cc1 miscompile 534 date Tue Feb 14 07:19:57 JST 2017 535 who rin 536 pr port-vax/51967 537 file external/gpl3/gcc/usr.bin/backend/Makefile : 1.35 538 descr 539 cc1 aborts due to SIGILL when compiling the sample code attached 540 to the PR. As a workaround, compile dse.c with -O0. 541 kcah 542 543 hack libssh miscompile 544 cdate Tue Feb 14 17:58:06 JST 2017 545 mdate Tue Feb 14 18:57:39 JST 2017 546 who rin 547 file crypto/external/bsd/openssh/lib/Makefile : 1.20 548 descr 549 poly1305.c and umac.c are miscompiled, which results in login 550 failure to/from external hosts via ssh. 551 kcah 552 553 hack mandoc miscompile 554 date Tue Feb 14 18:03:05 JST 2017 555 who rin 556 file external/bsd/mdocml/lib/libmandoc/Makefile : 1.8 557 descr 558 mandoc(1) receives SIGILL in in_line_argn() from mdoc_macro.c. 559 kcah 560 561 hack libX11 miscompile 562 date Thu Feb 16 10:00:22 JST 2017 563 who rin 564 file src/external/mit/xorg/lib/libX11/Makefile.libx11 : 1.18 565 descr 566 lcWrap.c is miscompiled, which results in input failure via XIM. 567 Besides, some clients, e.g., pkgsrc/x11/kterm, receive SIGSEGV. 568 kcah 569 570 port arm 571 572 hack gcc-unsigned-compare 573 cdate 09 Mar 2002 574 mdate 18 Mar 2002 575 who bjh21 576 file dist/bind/lib/nameser/ns_parse.c : 1.3 577 file dist/dhcp/minires/ns_parse.c : 1.3 578 file dist/dhcp/omapip/result.c : 1.2 579 file dist/dhcp/server/failover.c : 1.3 580 file gnu/dist/toolchain/bfd/bfd.c : 1.2 581 file gnu/dist/toolchain/bfd/format.c : 1.2 582 file gnu/dist/toolchain/gdb/target.c : 1.2 583 file sys/kern/vfs_subr.c : 1.172 584 descr When checking that a potentially-unsigned enum is >= 0, assign 585 it to an int first. This is necessary to avoid "comparison is 586 always true" warnings with -fshort-enums. Casting to an int 587 really should be enough, but turns out not to be. 588 kcah 589 590 hack gcc-4.5 arm CNAME hostname lookup failure on 591 certain DNS environment (probably -ftree-ter problem) 592 cdate Sat Dec 24 04:59:00 UTC 2011 593 mdate 594 who tsutsui 595 file lib/libc/net/Makefile.inc 1.79 596 descr Hostname lookup against CNAMEs by some commands fails 597 on certain DNS environments if lib/libc/net/gethnamaddr.c 598 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 599 are compiled with -O2, even though nslookup(1) against 600 the same CNAME returns proper hostname. 601 They works properly if compiled with -O2 -fno-tree-ter. 602 Also -O2 fails but -O2 -fno-tree-ter works on the following 603 test case in gcc bugzilla: 604 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 605 kcah 606 607 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 608 cdate Wed Nov 14 13:02:02 JST 2012 609 who msaitoh 610 file lib/libc/softfloat/Makefile.inc : 1.11 (hack removed) 611 pr 46953 612 regress src/tests/lib/libm/t_cbrt 613 regress src/tests/lib/libm/t_ceil 614 regress src/tests/lib/libm/t_exp 615 regress src/tests/lib/libm/t_log 616 regress src/tests/lib/libm/t_scalbn 617 regress src/tests/lib/libm/t_sinh 618 regress src/tests/lib/libm/t_sqrt 619 descr Gcc has a bug in tree optimization. For adddf3, 620 -INF + -INF returns 0 without -fno-tree-vrp. 621 Debugging with -fdump-tree-all shows that 622 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 623 is broken. 624 kcah 625 626 port sh3 627 628 hack gcc4-sh3-bz2 629 cdate Sun May 21 03:34:57 UTC 2006 630 mdate Fri May 16 13:13:00 UTC 2008 631 who mrg, tsutsui 632 file lib/libbz2/Makefile : 1.10 633 descr 634 The in-tree GCC 4.1-based compiler generated too-far 635 pc-relative addresses. Hack is to build with 636 -fno-loop-optimize. 637 kcah 638 639 port m68000 640 641 hack gcc4-m68000 642 cdate Fri Feb 8 10:29:37 PST 2008 643 mdate Sun May 4 15:37:19 UTC 2008 644 who mrg, tsutsui 645 file rescue/Makefile : 1.21 646 file sbin/dump_lfs/Makefile : 1.9 647 file sbin/fsck_ffs/Makefile : 1.35 648 file sbin/fsdb/Makefile : 1.22 649 file share/mk/sys.mk : 1.96 650 file usr.sbin/ndbootd/Makefile : 1.5 651 descr 652 Several internal compiler errors with gcc -O1 653 around 64bit integer arithmetic. 654 This hack uses -O1 and adds some -fno-tree-foo options 655 to avoid the problem. 656 This might be related with GCC Bugzilla Bug 32424. 657 kcah 658 659 port m68k,sh3,vax 660 661 hack gcc-4.8.1 662 cdate Wed Nov 6 20:41:35 EST 2013 663 who christos 664 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 665 descr 666 compile hashtable_c++0x.cc with -O2 instead of -Os to 667 produce missing instantiation of std::lower_bound expansion 668 for unsigned long. 669 kcah 670 671 port sparc 672 673 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 674 cdate Sun Aug 14 19:26:48 PDT 2011 675 who mrg 676 file sys/arch/sparc64/sparc/cpu.c : 1.234 677 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 678 file sys/arch/sparc64/sparc/genassym.cf : 1.67 679 file sys/arch/sparc64/sparc/locore.s : 1.265 680 descr 681 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 682 Post newlock2 there was a bug where a lock was reduced from 683 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 684 would crash due to NULL IPI. This was fixed by re-using the 685 right IPL value. However, GCC 4.5.3 build kernels have the 686 same problems. For now, the hack is re-instated. 687 kcah 688 689 690 port mips 691 692 hack mips-shared-linker-load-address 693 cdate Fri Oct 7 08:33:10 UTC 2005 694 who simonb 695 file src/sys/kern/exec_elf32.c : 1.107 696 descr 697 With COMPAT_16 or previous enabled (which enables 698 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 699 load and run at address 0. The check to fix this in 700 rev 1.107 only checks the first psection of the ELF 701 executable, which may not be loadable. A more correct 702 fix is to check the first loadable psection instead of 703 just the first psection. 704 kcah 705 706 hack mips-duplicate-ras-end-label 707 cdate Sat Sep 2 23:29:42 2006 708 who martin 709 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 710 descr 711 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 712 labels by duplicated __asm output from RAS_END() 713 macro. 714 kcah 715 716 hack mips-mcount-assembler-warning 717 cdate Tue Jul 29 14:16:52 UTC 2008 718 who lukem 719 file src/lib/libc/gmon/Makefile.inc : 1.8 720 descr 721 Workaround for PR port-mips/39192. 722 common/lib/libc/gmon/mcount.c generates a (fatal) 723 assembler warning on MIPS: 724 Warning: No .cprestore pseudo-op used in PIC code 725 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 726 kcah 727 728 port i386 729 730 hack use volatile intermediate variable to enforce rounding 731 cdate Tue Aug 1 22:15:55 MEST 2006 732 who drochner 733 file src/lib/libm/src/lrintf.c : 1.4 734 file src/lib/libm/src/s_rintf.c : 1.8 735 descr 736 gcc-4 does subsequent operations on "float" values within 737 the i387 FPU without rounding the intermediate results 738 kcah 739 740 port x86 741 hack turn off optimization for biosdisk_ll.c because otherwise 742 we are pass the wrong arguments to biosdisk_read(). 743 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 744 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 745 cdate Mon Apr 7 21:09:55 2014 UTC 746 who christos 747 file src/sys/arch/i386/stand/lib/Makefile : 1.38 748 descr 749 Turning on DISK_DEBUG shows the problem. We should find 750 out which option is causing this. 751 hcah 752 753 port powerpc 754 755 hack avoid using __builtin_return_address(0) because it fails in 756 Xorg's module loader 757 cdate Sat Sep 27 03:52:05 UTC 2008 758 who macallan 759 file src/libexec/ld.elf_so/rtld.c : 1.121 760 descr 761 workaround for PR port-macppc/37812 762 kcah 763 764 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 765 building the native compiler via build.sh those don't defined 766 properly. 767 cdate Sat Mar 12 08:00:00 UTC 2011 768 who matt 769 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h : 1.7 770 descr 771 see above 772 kcah 773 774 port powerpc64 775 776 hack include _errno.c in libposix so that __errno resolves. It 777 should resolve from libc's errno, but somehow it does not. 778 Linker bug? 779 cdate Thu Oct 27 13:19:47 EDT 2011 780 who christos 781 file src/lib/libposix/Makefile: 1.15 782 file src/lib/librt/Makefile: 1.14 783 descr 784 workaround for: 785 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 786 R_PPC64_REL24 relocation against symbol `.__errno' 787 kcah 788 789 hack rename data() function in mdocml to avoid redefined error. 790 Compiler/Assembler bug? 791 cdate Sat Oct 29 11:16:01 EDT 2011 792 who christos 793 file src/external/bsd/mdocml/tbl_data.c: 1.2 794 descr 795 workaround for: 796 {standard input}: Assembler messages: 797 {standard input}:105: Error: symbol `.data' is already \ 798 defined 799 kcah 800 801 port emips 802 803 hack Add nop between ctc1 and mtc0 to avoid assembler internal 804 error 805 cdate Sat Oct 29 16:57:34 EDT 2011 806 who christos 807 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 808 descr 809 workaround for: 810 {standard input}: Assembler messages: 811 {standard input}:730: Internal error! 812 Assertion failure in append_insn at /usr/src/external/gpl3/\ 813 binutils/dist/gas/config/tc-mips.c line 2910. 814 kcah 815 816 port ia64 817 818 hack libgcc unwind dummy function 819 cdate Fri Apr 17 14:31:03 CEST 2015 820 who martin 821 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 822 descr 823 Add an empty _Unwind_FindTableEntry() implementation. 824 In the end we will use our libc stuff, and this should 825 go away again. 826 kcah 827 828 port x68k 829 830 hack compiler error with gcc 4.5.x 831 cdate Fri May 24 13:23:01 EDT 2013 832 who christos 833 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 834 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 835 descr 836 workaround for: 837 internal compiler error: in cselib_record_set, at cselib.c:1999 838 kcah 839 840 hack fallback to /usr/bin/clang-cpp in rpcgen 841 cdate Wed Jun 5 15:49:27 CEST 2013 842 who joerg 843 file src/usr.bin/rpcgen/rpc_main.c : 1.35 844 descr 845 It is undecided which compiler owns /usr/bin/cpp and whether it should 846 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 847 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 848 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 849 kcah 850 851 port hppa 852 853 hack compiler error with gcc 4.5.x 854 cdate Tue Jul 23 07:42:28 BST 2013 855 who skrll 856 file src/sys/lib/libkern/Makefile.libkern: 1.26 857 descr 858 workaround for unanalysed codegen bug affecting md5c.c. 859 kcah 860 861 hack gdb vs _rtld_debug_state problem 862 cdate Thu Mar 5 09:49:53 UTC 2015 863 who skrll 864 file src/libexec/ld.elf_so/rtld.c: 1.175 865 descr 866 workaround for problem where gdb misses the breakpoint on 867 _rtld_debug_state when the function is only the 868 bv,n %r0(%rp) instruction - the nullify seems to 869 confuse something 870 kcah 871 872 port mips64* 873 hack compiler crashes on mips64* with optimization enabled 874 cdate Tue May 13 18:46:48 UTC 2014 875 who macallan 876 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 877 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 878 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 879 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 880 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 881 pr 48696 882 kcah 883 884 port vax 885 hack compile boot with -O1 886 cdate Sat May 24 09:40:58 CEST 2014 887 who martin 888 file src/sys/arch/vax/boot/boot/Makefile: 1.41 889 descr /boot does not work when compiled with -O2 and gcc 4.8 890 kcah 891 892 port vax 893 hack compile nir.c in gallium with -O1 894 cdate Mon Oct 28 14:39:35 EDT 2019 895 who christos 896 file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 897 descr gallium does not compile. 898 kcah 899 900 port sh3 901 hack compile parse.c in battlestar with -Wno-restrict 902 cdate Mon Oct 28 14:39:35 EDT 2019 903 who christos 904 file /cvsroot/src/games/battlestar/Makefile 1.11 905 descr fails to compile, confused by char words[][]; 906 strcpy(words[n - 1], words[n + 1]); 907 kcah 908 909 port sh3 910 hack compile ddns.c in dhcpcd with no-stringop-overflow 911 cdate Tue Oct 29 20:25:59 EDT 2019 912 who christos 913 file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 914 descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 915 kcah 916 917 port arm 918 hack avoid using labels in a 12-bit constant. 919 cdate Mon Mar 30 05:26:47 2015 UTC 920 who matt 921 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 922 descr workaround for clang misassembling an instruction 923 kcah 924 925 port sparc64 926 hack during profiling with -m32 (and ASLR) labels are not generated 927 consistently 928 cdate Sat Feb 11 04:56:37 2017 UTC 929 who christos 930 file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 931 desc asn1_krb5_asn1.po does not produce the same results during successive 932 compilation runs; it is bimodal. Turning optimization to -O0 fixes 933 the issue 934 kcah 935 936 port ia64 937 hack ski emulator crashes 938 cdate Sat Apr 8 18:10:43 2017 UTC 939 who scole 940 file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 941 desc 942 ski emulator crashes during acpi detection. Added a check for 943 uninitialized index. Submitted a request for change with upstream 944 mailing list, but never got a response 945 kcah 946 947 port vax 948 hack compile rtld.c with -O0 949 cdate Wed Apr 3 17:38:38 EDT 2019 950 who christos 951 file src/libexec/ld.elf_so/Makefile: 1.141 952 descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 953 second pass loop with elm == 0xffffffff 954 kcah 955 956 port alpha 957 hack GCC 7.4/8.3: userland binaries crash randomly (port-alpha/54307) 958 cdate Fri Nov 1 20:43:35 UTC 2019 959 who rin 960 file src/external/bsd/jemalloc/lib/Makefile.inc: 1.11 961 descr rtree.c and tcache.c need to be compiled with -O0, alternatively, 962 you can compile whole jemalloc with -DJEMALLOC_DEBUG. 963 kcah 964 965 port powerpc 966 hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 967 cdate Wed Jan 29 17:40:19 EST 2020 968 who christos 969 file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 970 file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 971 file src/tests/lib/libc/misc/Makefile: 1.5 972 973 descr Disable optimization on tc.c, logerr.c, ubsan.c crashes: 974 lib/libLLVMCodeGen/../../llvm/../../external/apache2/llvm/lib/..\ 975 /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \ 976 function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const" 977 kcah 978 979 port earmv7hf* 980 hack compile gdb/dwarf2expr.c with -O0 for GCC8 (toolchain/54820 and 54877) 981 cdate Wed Apr 29 11:04:58 UTC 2020 982 who rin 983 file src/external/gpl3/gdb/lib/libgdb/Makefile: 1.22 984 descr GCC 8.4 miscompiles dwarf2expr.c with -O2 or -O1, which results in 985 crashes with 'gdb_exception_RETURN_MASK_ERROR'. Note that this occurs 986 only for earmv7hf{,eb} as far as I can see. Neither earmv6hf{,eb} nor 987 earmv7{,eb} (softfloat) are affected. 988 kcah 989
Indexes created Wed Nov 05 19:10:08 GMT 2025