HACKS revision 1.201
1 # $NetBSD: HACKS,v 1.201 2020/04/12 17:49:00 leot 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 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 411 who tsutsui 412 file sys/arch/vax/conf/Makefile.vax 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 508 file distrib/vax/miniroot/Makefile.inc 509 file distrib/vax/ramdisk/Makefile 510 file external/gpl3/gdb/lib/libdecnumber/Makefile 511 file sbin/fsdb/Makefile 512 file sbin/newfs_ext2fs/Makefile 513 file sbin/ping/Makefile 514 file usr.sbin/lmcconfig/Makefile 515 file usr.sbin/mtrace/Makefile 516 descr 517 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 518 internal compiler error: in change_address_1, at emit-rtl.c:2019 519 external/gpl3/gcc/dist/gcc/recog.c:770:1: 520 internal compiler error: in change_address_1, at emit-rtl.c:2019 521 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 522 internal compiler error: in change_address_1, at emit-rtl.c:2019 523 sbin/ping/ping.c:679:1: 524 internal compiler error: in change_address_1, at emit-rtl.c:2019 525 sbin/newfs_ext2fs/mke2fs.c:681:1: 526 internal compiler error: in reload_combine_note_use, 527 at postreload.c:1561 528 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 529 internal compiler error: in change_address_1, at emit-rtl.c:2019 530 usr.sbin/lmcconfig/lmcconfig.c:939:3: 531 internal compiler error: in reload_combine_note_use, 532 at postreload.c:1561 533 usr.sbin/mtrace/mtrace.c:1655:1: 534 internal compiler error: in change_address_1, at emit-rtl.c:2019 535 kcah 536 537 hack gcc 5.4 cc1 miscompile 538 date Tue Feb 14 07:19:57 JST 2017 539 who rin 540 pr port-vax/51967 541 file external/gpl3/gcc/usr.bin/backend/Makefile : 1.35 542 descr 543 cc1 aborts due to SIGILL when compiling the sample code attached 544 to the PR. As a workaround, compile dse.c with -O0. 545 kcah 546 547 hack libssh miscompile 548 cdate Tue Feb 14 17:58:06 JST 2017 549 mdate Tue Feb 14 18:57:39 JST 2017 550 who rin 551 file crypto/external/bsd/openssh/lib/Makefile : 1.20 552 descr 553 poly1305.c and umac.c are miscompiled, which results in login 554 failure to/from external hosts via ssh. 555 kcah 556 557 hack mandoc miscompile 558 date Tue Feb 14 18:03:05 JST 2017 559 who rin 560 file external/bsd/mdocml/lib/libmandoc/Makefile : 1.8 561 descr 562 mandoc(1) receives SIGILL in in_line_argn() from mdoc_macro.c. 563 kcah 564 565 hack libX11 miscompile 566 date Thu Feb 16 10:00:22 JST 2017 567 who rin 568 file src/external/mit/xorg/lib/libX11/Makefile.libx11 : 1.18 569 descr 570 lcWrap.c is miscompiled, which results in input failure via XIM. 571 Besides, some clients, e.g., pkgsrc/x11/kterm, receive SIGSEGV. 572 kcah 573 574 port arm 575 576 hack gcc-unsigned-compare 577 cdate 09 Mar 2002 578 mdate 18 Mar 2002 579 who bjh21 580 file dist/bind/lib/nameser/ns_parse.c : 1.3 581 file dist/dhcp/minires/ns_parse.c : 1.3 582 file dist/dhcp/omapip/result.c : 1.2 583 file dist/dhcp/server/failover.c : 1.3 584 file gnu/dist/toolchain/bfd/bfd.c : 1.2 585 file gnu/dist/toolchain/bfd/format.c : 1.2 586 file gnu/dist/toolchain/gdb/target.c : 1.2 587 file sys/kern/vfs_subr.c : 1.172 588 descr When checking that a potentially-unsigned enum is >= 0, assign 589 it to an int first. This is necessary to avoid "comparison is 590 always true" warnings with -fshort-enums. Casting to an int 591 really should be enough, but turns out not to be. 592 kcah 593 594 hack gcc-4.5 arm CNAME hostname lookup failure on 595 certain DNS environment (probably -ftree-ter problem) 596 cdate Sat Dec 24 04:59:00 UTC 2011 597 mdate 598 who tsutsui 599 file lib/libc/net/Makefile.inc 1.79 600 descr Hostname lookup against CNAMEs by some commands fails 601 on certain DNS environments if lib/libc/net/gethnamaddr.c 602 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 603 are compiled with -O2, even though nslookup(1) against 604 the same CNAME returns proper hostname. 605 They works properly if compiled with -O2 -fno-tree-ter. 606 Also -O2 fails but -O2 -fno-tree-ter works on the following 607 test case in gcc bugzilla: 608 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 609 kcah 610 611 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 612 cdate Wed Nov 14 13:02:02 JST 2012 613 who msaitoh 614 file lib/libc/softfloat/Makefile.inc 615 pr 46953 616 regress src/tests/lib/libm/t_cbrt 617 regress src/tests/lib/libm/t_ceil 618 regress src/tests/lib/libm/t_exp 619 regress src/tests/lib/libm/t_log 620 regress src/tests/lib/libm/t_scalbn 621 regress src/tests/lib/libm/t_sinh 622 regress src/tests/lib/libm/t_sqrt 623 descr Gcc has a bug in tree optimization. For adddf3, 624 -INF + -INF returns 0 without -fno-tree-vrp. 625 Debugging with -fdump-tree-all shows that 626 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 627 is broken. 628 kcah 629 630 port sh3 631 632 hack gcc4-sh3-bz2 633 cdate Sun May 21 03:34:57 UTC 2006 634 mdate Fri May 16 13:13:00 UTC 2008 635 who mrg, tsutsui 636 file lib/libbz2/Makefile : 1.10 637 descr 638 The in-tree GCC 4.1-based compiler generated too-far 639 pc-relative addresses. Hack is to build with 640 -fno-loop-optimize. 641 kcah 642 643 port m68000 644 645 hack gcc4-m68000 646 cdate Fri Feb 8 10:29:37 PST 2008 647 mdate Sun May 4 15:37:19 UTC 2008 648 who mrg, tsutsui 649 file rescue/Makefile : 1.21 650 file sbin/dump_lfs/Makefile : 1.9 651 file sbin/fsck_ffs/Makefile : 1.35 652 file sbin/fsdb/Makefile : 1.22 653 file share/mk/sys.mk : 1.96 654 file usr.sbin/ndbootd/Makefile : 1.5 655 descr 656 Several internal compiler errors with gcc -O1 657 around 64bit integer arithmetic. 658 This hack uses -O1 and adds some -fno-tree-foo options 659 to avoid the problem. 660 This might be related with GCC Bugzilla Bug 32424. 661 kcah 662 663 port m68k,sh3,vax 664 665 hack gcc-4.8.1 666 cdate Wed Nov 6 20:41:35 EST 2013 667 who christos 668 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 669 descr 670 compile hashtable_c++0x.cc with -O2 instead of -Os to 671 produce missing instantiation of std::lower_bound expansion 672 for unsigned long. 673 kcah 674 675 port sparc 676 677 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 678 cdate Sun Aug 14 19:26:48 PDT 2011 679 who mrg 680 file sys/arch/sparc64/sparc/cpu.c : 1.234 681 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 682 file sys/arch/sparc64/sparc/genassym.cf : 1.67 683 file sys/arch/sparc64/sparc/locore.s : 1.265 684 descr 685 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 686 Post newlock2 there was a bug where a lock was reduced from 687 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 688 would crash due to NULL IPI. This was fixed by re-using the 689 right IPL value. However, GCC 4.5.3 build kernels have the 690 same problems. For now, the hack is re-instated. 691 kcah 692 693 694 port mips 695 696 hack mips-shared-linker-load-address 697 cdate Fri Oct 7 08:33:10 UTC 2005 698 who simonb 699 file src/sys/kern/exec_elf32.c : 1.107 700 descr 701 With COMPAT_16 or previous enabled (which enables 702 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 703 load and run at address 0. The check to fix this in 704 rev 1.107 only checks the first psection of the ELF 705 executable, which may not be loadable. A more correct 706 fix is to check the first loadable psection instead of 707 just the first psection. 708 kcah 709 710 hack mips-duplicate-ras-end-label 711 cdate Sat Sep 2 23:29:42 2006 712 who martin 713 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 714 descr 715 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 716 labels by duplicated __asm output from RAS_END() 717 macro. 718 kcah 719 720 hack mips-mcount-assembler-warning 721 cdate Tue Jul 29 14:16:52 UTC 2008 722 who lukem 723 file src/lib/libc/gmon/Makefile.inc : 1.8 724 descr 725 Workaround for PR port-mips/39192. 726 common/lib/libc/gmon/mcount.c generates a (fatal) 727 assembler warning on MIPS: 728 Warning: No .cprestore pseudo-op used in PIC code 729 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 730 kcah 731 732 port i386 733 734 hack use volatile intermediate variable to enforce rounding 735 cdate Tue Aug 1 22:15:55 MEST 2006 736 who drochner 737 file src/lib/libm/src/lrintf.c : 1.4 738 file src/lib/libm/src/s_rintf.c : 1.8 739 descr 740 gcc-4 does subsequent operations on "float" values within 741 the i387 FPU without rounding the intermediate results 742 kcah 743 744 port x86 745 hack turn off optimization for biosdisk_ll.c because otherwise 746 we are pass the wrong arguments to biosdisk_read(). 747 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 748 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 749 who christos 750 file src/sys/arch/i386/stand/lib/Makefile : 1.38 751 descr 752 Turning on DISK_DEBUG shows the problem. We should find 753 out which option is causing this. 754 hcah 755 756 port powerpc 757 758 hack avoid using __builtin_return_address(0) because it fails in 759 Xorg's module loader 760 cdate Sat Sep 27 03:52:05 UTC 2008 761 who macallan 762 file src/libexec/ld.elf_so/rtld.c : 1.121 763 descr 764 workaround for PR port-macppc/37812 765 kcah 766 767 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 768 building the native compiler via build.sh those don't defined 769 properly. 770 cdate Sat Mar 12 08:00:00 UTC 2011 771 who matt 772 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 773 descr 774 see above 775 kcah 776 777 port powerpc64 778 779 hack include _errno.c in libposix so that __errno resolves. It 780 should resolve from libc's errno, but somehow it does not. 781 Linker bug? 782 cdate Thu Oct 27 13:19:47 EDT 2011 783 who christos 784 file src/lib/libposix/Makefile: 1.15 785 file src/lib/librt/Makefile: 1.14 786 descr 787 workaround for: 788 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 789 R_PPC64_REL24 relocation against symbol `.__errno' 790 kcah 791 792 hack rename data() function in mdocml to avoid redefined error. 793 Compiler/Assembler bug? 794 cdate Sat Oct 29 11:16:01 EDT 2011 795 who christos 796 file src/external/bsd/mdocml/tbl_data.c: 1.2 797 descr 798 workaround for: 799 {standard input}: Assembler messages: 800 {standard input}:105: Error: symbol `.data' is already \ 801 defined 802 kcah 803 804 port emips 805 806 hack Add nop between ctc1 and mtc0 to avoid assembler internal 807 error 808 cdate Sat Oct 29 16:57:34 EDT 2011 809 who christos 810 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 811 descr 812 workaround for: 813 {standard input}: Assembler messages: 814 {standard input}:730: Internal error! 815 Assertion failure in append_insn at /usr/src/external/gpl3/\ 816 binutils/dist/gas/config/tc-mips.c line 2910. 817 kcah 818 819 port ia64 820 821 hack libgcc unwind dummy function 822 cdate Fri Apr 17 14:31:03 CEST 2015 823 who martin 824 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 825 descr 826 Add an empty _Unwind_FindTableEntry() implementation. 827 In the end we will use our libc stuff, and this should 828 go away again. 829 kcah 830 831 port x68k 832 833 hack compiler error with gcc 4.5.x 834 cdate Fri May 24 13:23:01 EDT 2013 835 who christos 836 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 837 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 838 descr 839 workaround for: 840 internal compiler error: in cselib_record_set, at cselib.c:1999 841 kcah 842 843 hack fallback to /usr/bin/clang-cpp in rpcgen 844 cdate Wed Jun 5 15:49:27 CEST 2013 845 who joerg 846 file src/usr.bin/rpcgen/rpc_main.c 847 descr 848 It is undecided which compiler owns /usr/bin/cpp and whether it should 849 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 850 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 851 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 852 kcah 853 854 port hppa 855 856 hack compiler error with gcc 4.5.x 857 cdate Tue Jul 23 07:42:28 BST 2013 858 who skrll 859 file src/sys/lib/libkern/Makefile.libkern: 1.26 860 descr 861 workaround for unanalysed codegen bug affecting md5c.c. 862 kcah 863 864 hack gdb vs _rtld_debug_state problem 865 cdate Thu Mar 5 09:49:53 UTC 2015 866 who skrll 867 file src/libexec/ld.elf_so/rtld.c: 1.175 868 descr 869 workaround for problem where gdb misses the breakpoint on 870 _rtld_debug_state when the function is only the 871 bv,n %r0(%rp) instruction - the nullify seems to 872 confuse something 873 kcah 874 875 port mips64* 876 hack compiler crashes on mips64* with optimization enabled 877 cdate Tue May 13 18:46:48 UTC 2014 878 who macallan 879 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 880 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 881 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 882 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 883 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 884 pr 48696 885 kcah 886 887 port vax 888 hack compile boot with -O1 889 cdate Sat May 24 09:40:58 CEST 2014 890 who martin 891 file src/sys/arch/vax/boot/boot/Makefile: 1.41 892 descr /boot does not work when compiled with -O2 and gcc 4.8 893 kcah 894 895 port vax 896 hack compile nir.c in gallium with -O1 897 cdate Mon Oct 28 14:39:35 EDT 2019 898 who christos 899 file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 900 descr gallium does not compile. 901 kcah 902 903 port sh3 904 hack compile parse.c in battlestar with -Wno-restrict 905 cdate Mon Oct 28 14:39:35 EDT 2019 906 who christos 907 file /cvsroot/src/games/battlestar/Makefile 1.11 908 descr fails to compile, confused by char words[][]; 909 strcpy(words[n - 1], words[n + 1]); 910 kcah 911 912 port sh3 913 hack compile ddns.c in dhcpcd with no-stringop-overflow 914 cdate Tue Oct 29 20:25:59 EDT 2019 915 who christos 916 file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 917 descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 918 kcah 919 920 port arm 921 hack avoid using labels in a 12-bit constant. 922 who matt 923 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 924 descr workaround for clang misassembling an instruction 925 kcah 926 927 port sparc64 928 hack during profiling with -m32 (and ASLR) labels are not generated 929 consistently 930 who christos 931 file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 932 desc asn1_krb5_asn1.po does not produce the same results during successive 933 compilation runs; it is bimodal. Turning optimization to -O0 fixes 934 the issue 935 kcah 936 937 port ia64 938 hack ski emulator crashes 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
Indexes created Wed Nov 05 19:10:08 GMT 2025