HACKS revision 1.206
1 # $NetBSD: HACKS,v 1.206 2020/05/06 14:33:52 snj 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/nfs/nfs_serv.c : 1.108 175 file sys/nfs/nfs_socket.c : 1.129 176 file sys/nfs/nfs_syscalls.c : 1.91 177 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 178 file usr.bin/ftp/ftp.c : 1.140 179 file usr.bin/find/function.c : 1.54 180 file usr.bin/mail/tty.c : 1.20 181 file usr.bin/msgc/msg_sys.def : 1.33-1.34 182 file usr.bin/nl/nl.c : 1.7 183 file usr.bin/systat/keyboard.c : 1.23 184 file usr.bin/usbhidctl/usbhid.c : 1.29 185 file usr.bin/vi/cl/cl_read.c : 1.5 186 file usr.bin/vi/ex/ex_cscope.c : 1.12 187 file usr.bin/vi/ex/ex_tag.c : 1.19 188 file usr.bin/vi/vi/v_txt.c : 1.15 189 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 190 file usr.sbin/cron/do_command.c : 1.19 191 file usr.sbin/timed/timed/slave.c : 1.15 192 descr 193 GCC 4.1 gets many uninitialised variable warnings wrong. We should 194 really audit all the old hacks like this when older compilers are 195 removed from the tree, as many are probably no longer required. 196 The problem is that it does not recognize initialization via function 197 call pointer. I.e. 198 int p; 199 foo(&p); 200 does not mark p as initialized. 201 kcah 202 203 hack gcc4 pointer sign and strict aliasing problems 204 mdate 10 May 2006 205 who mrg 206 file bin/ed/Makefile : 1.33 207 file distrib/utils/sysinst/Makefile.inc : 1.44 208 file distrib/utils/x_dhclient/Makefile : 1.15 209 file games/bcd/Makefile : 1.5 210 file games/dab/Makefile : 1.5 211 file games/larn/Makefile : 1.17 212 file games/pom/Makefile : 1.5 213 file lib/libasn1/Makefile : 1.26 214 file lib/libcrypt/Makefile : 1.17 215 file lib/libgssapi/Makefile : 1.16 216 file lib/libhdb/Makefile : 1.20 217 file lib/libkadm5clnt/Makefile : 1.21 218 file lib/libkadm5srv/Makefile : 1.25 219 file lib/libkrb5/Makefile : 1.35 220 file lib/libssh/Makefile : 1.6 221 file lib/libtelnet/Makefile : 1.26 222 file libexec/getty/Makefile : 1.14 223 file libexec/kadmind/Makefile : 1.19 224 file libexec/kpasswdd/Makefile : 1.14 225 file sbin/atactl/Makefile : 1.3 226 file sbin/cgdconfig/Makefile : 1.7 227 file sbin/clri/Makefile : 1.13 228 file sbin/dkctl/Makefile : 1.4 229 file sbin/dump/Makefile : 1.33 230 file sbin/fdisk/Makefile : 1.35 231 file sbin/fsck_ext2fs/Makefile : 1.11 232 file sbin/fsck_ffs/Makefile : 1.29 233 file sbin/fsdb/Makefile : 1.18 234 file sbin/newfs/Makefile : 1.30 235 file sbin/newfs_sysvbfs/Makefile : 1.2 236 file sbin/restore/Makefile : 1.23 237 file sbin/veriexecctl/Makefile : 1.11 238 file sys/lib/libsa/Makefile : 1.59 239 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 240 file usr.bin/awk/Makefile : 1.9 241 file usr.bin/crontab/Makefile : 1.24 242 file usr.bin/ctags/Makefile : 1.8 243 file usr.bin/gzip/Makefile : 1.10 244 file usr.bin/ssh/sftp/Makefile : 1.10 245 file usr.bin/ssh/ssh/Makefile : 1.25 246 file usr.bin/vi/build/Makefile : 1.26 247 file usr.bin/telnet/Makefile : 1.40 248 file usr.bin/tn3270/tn3270/Makefile : 1.36 249 file usr.bin/tr/Makefile : 1.4 250 file usr.sbin/amd/amd/Makefile : 1.27 251 file usr.sbin/amd/amq/Makefile : 1.14 252 file usr.sbin/amd/libamu/Makefile : 1.20 253 file usr.sbin/amd/pawd/Makefile : 1.5 254 file usr.sbin/bind/Makefile.inc : 1.22 255 file usr.sbin/bind/libdns/Makefile : 1.3 256 file usr.sbin/bind/named/Makefile : 1.17 257 file usr.sbin/bootp/bootptest/Makefile : 1.2 258 file usr.sbin/chrtbl/Makefile : 1.6 259 file usr.sbin/cron/Makefile : 1.12 260 file usr.sbin/dhcp/Makefile.inc : 1.20 261 file usr.sbin/hprop/Makefile : 1.13 262 file usr.sbin/installboot/Makefile : 1.35 263 file usr.sbin/ipf/ipftest/Makefile : 1.32 264 file usr.sbin/isdn/isdnd/Makefile : 1.6 265 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 266 file usr.sbin/isdn/isdntel/Makefile : 1.2 267 file usr.sbin/isdn/isdntrace/Makefile : 126 268 file usr.sbin/mopd/common/Makefile : 1.10 269 file usr.sbin/mopd/mopd/Makefile : 1.9 270 file usr.sbin/mopd/mopprobe/Makefile : 1.7 271 file usr.sbin/makefs/Makefile : 1.17 272 file usr.sbin/mscdlabel/Makefile : 1.5 273 file usr.sbin/pkg_install/add/Makefile : 1.7 274 file usr.sbin/pkg_install/create/Makefile : 1.5 275 file usr.sbin/pkg_install/lib/Makefile : 1.28 276 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 277 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 278 file usr.sbin/pppd/Makefile.inc : 1.3 279 file usr.sbin/pppd/pppd/Makefile : 1.38 280 file usr.sbin/rarpd/Makefile : 1.10 281 file usr.sbin/rbootd/Makefile : 1.10 282 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 283 file usr.sbin/tcpdump/Makefile : 1.42 284 descr 285 GCC 4.1 warns on pointer sign comparision/assignments and lots of 286 code does not conform. For now we use -Wno-pointer-sign and 287 -fno-strict-aliasing. 288 kcah 289 290 hack disable ctf for gcc-4.8 build 291 mdate April 3 2014 292 who christos 293 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 294 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 295 descr 296 nbctfconvert -g -L VERSION -g fold-const.o 297 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 298 ((null)) <13532> 299 kcak 300 301 hack emacs aborting on exit (libgcc issue) 302 mdate 7 November 2011 303 who christos 304 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 305 descr 306 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 307 to do just that. If the symbol requested is not found, then it aborts. 308 emacs 23.3 triggers this assertion. For now disable aborting, and 309 silently ignore. 310 kcah 311 312 hack cross-building hack on Darwin 313 mdate 20 July 2008 314 who agc 315 file src/distrib/common/Makefile.mdset : 1.33 316 descr 317 Darwin has problems with getopt() when used in mdsetimage -v, 318 due to the difference between BSD and libiberty() getopt 319 implementations, more fully described in 320 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 321 and the subsequent thread. For just now, we just have an ugly 322 workaround not to call mdsetimage with the -v argument on Darwin 323 kcah 324 325 hack avoid rebuilding asn1 libraries 326 mdate 03 August 2008 327 who veego 328 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 329 file src/lib/libasn1/Makefile : 1.32 330 file src/lib/libhdb/Makefile : 1.23 331 file src/lib/libgssapi/Makefile : 1.20 332 file src/lib/libhx509/Makefile : 1.3 333 pr 9702 39185 334 descr 335 asn1_compile does not check if generated header files do not have to 336 be rebuild. 337 Generate .hx files and copy it in the Makefiles if they changed. 338 kcah 339 340 hack Disable fortification for /usr/bin/makeinfo 341 cdata 24 Mar 2014 342 who tron 343 file src/external/gpl2/texinfo/bin/makeinfo/Makefile : 1.1 344 pr N/A 345 descr 346 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 347 it fails to process certain texinfo files, e.g. "cl.texi" 348 included in the Emacs 24.3 distribution. 349 kcah 350 351 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 352 cdata 05 Apr 2014 353 who tron 354 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 355 pr N/A 356 descr 357 If "xauth" is compile with "USE_SSP" set to "yes" it fails 358 mysteriously with an error message like this: 359 360 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 361 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 362 363 The compiler seems to get confused about the two filename variables 364 used in the link(2) system call. 365 kcah 366 367 hack g++ 5.x barfs on volatile in constexpr initializers 368 cdata 27 Aug 2015 369 who pooka 370 file src/lib/libpthread/pthread_types.h : 1.17 371 pr lib/49989 372 descr 373 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 374 in C++ results in: 375 error: temporary of non-literal type '__pthread_mutex_st' 376 in a constant expression 377 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 378 [...] 379 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 380 not literal because: 381 struct __pthread_mutex_st { 382 ^ 383 include/pthread_types.h:103:17: note: non-static data 384 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 385 pthread_spin_t ptm_errorcheck; 386 kcah 387 388 hack libm cabs{,f,l} and g++ 389 cdata 11 Jan 2016 390 who christos 391 pr lib/50646 392 file src/external/gpl3/gcc.old/dist/libstdc++-v3/include/std/complex : 1.2 393 file src/external/gpl3/gcc/dist/libstdc++-v3/include/std/complex : 1.2 394 descr 395 Our cabs and cabsf have a different argument format on some architectures 396 and for that we have created in libm/compat_cabs{,f}.c. The standard 397 versions in libc are __c99_cabs{,f,l} and there are __RENAME()'s in 398 <complex.h>. G++ uses __builtin_cabs{,f,l} to implement those and they 399 translate by default to cabs{,f,l} which gets defined to cabs{,f} (the 400 wrong function) and an undefined cabsl. I've changed <complex> to use 401 the __c99_cabs{,f,l} directly. Using the __builtin_cabs{,f,l} in gcc is 402 still broken. 403 kcah 404 405 port vax 406 407 hack gcc4/vax ICE 408 cdate Sat Dec 22 08:17:57 2007 UTC 409 who tsutsui 410 file sys/arch/vax/conf/Makefile.vax : 1.79 411 descr 412 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 413 -fno-tree-ter prevents it so add it to COPTS. 414 kcah 415 416 hack gcc4/vax compiler crash 417 cdate Fri Jun 30 22:39:12 PDT 2006 418 who mrg 419 file bin/csh/Makefile : 1.27 420 file lib/i18n_module/UTF7/Makefile : 1.2 421 descr 422 GCC4 on vax crashes. -O0 stops it happening so far... 423 kcah 424 425 hack declare boolean_t in two IPF user-mode programs 426 cdate Tue Mar 7 19:19:20 CET 2006 427 who he 428 file dist/ipf/ipsend/iptests.c : 1.8 429 dist/ipf/ipsend/sock.c : 1.7 430 descr 431 The IPF user-mode programs ipsend and iptest first 432 include <sys/types.h> without _KERNEL defined, and 433 later include <sys/file.h> with _KERNEL defined. 434 This causes a build failure when building for vax, 435 since <sys/device.h> ends up being included without 436 bollean_t being defined by <sys/types.h>. 437 Build failure and further details documented in 438 PR#32907. 439 kcah 440 441 hack pcc 0.9.9 large string literals 442 cdat 8 July 2008 443 who gmcgarry 444 file sys/conf/param.c : 1.58 445 descr 446 Workaround for pcc 0.9.9 not handling large string literals 447 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 448 fail compilation. 449 There is a proposal on the pcc mailing list to stuff config 450 file in ELF section. 451 kcah 452 453 hack xorg warnings 454 cdat 30 July 2008, 3 June, 2013 455 who mrg 456 file external/mit/xorg/lib/libSM/Makefile : 1.2 457 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 458 external/mit/xorg/lib/libXext/Makefile : 1.2 459 external/mit/xorg/lib/libXfont/Makefile : 1.2 460 descr 461 Disable several warnings or use -Wno-error across Xorg sources 462 while we get them working 463 kcah 464 465 hack 32 bit time leftovers 466 cdat 11 January 2009 467 who christos 468 file lib/libc/time/localtime.c : 1.41 469 lib/libc/time/zic.c : 1.23 470 descr 471 The timezone compiled files still contain 32 bit time_t 472 quantities. I did not want to version the files because 473 the ``parser'' is too ugly for words. What needs to be 474 done, is to rewrite the parser from scratch also to avoid 475 potential core-dumps from parsing invalid files. 476 kcah 477 478 hack 32 bit time leftovers 479 cdat 11 January 2009 480 who christos 481 file various 482 descr 483 Many filesystem on-disk formats have 32 bit times. 484 kcah 485 486 hack gcc 4.5 fsdb miscompile 487 date Sat Nov 9 11:03:02 EST 2013 488 who christos 489 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 490 descr 491 src/sbin/fsdb/fsdb.c: In function 'findblk': 492 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 493 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 494 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 495 (const_int 8 [0x8])) 496 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 497 -1 (nil)) 498 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 499 extract_insn, at recog.c:2103 500 kcah 501 502 hack gcc 4.8 gcc miscompiles 503 date Sat Nov 9 16:35:18 EST 2013 504 who christos 505 file distrib/utils/x_ping/Makefile : 1.8 506 file distrib/vax/miniroot/Makefile.inc : ? 507 file distrib/vax/ramdisk/Makefile : ? 508 file external/gpl3/gdb/lib/libdecnumber/Makefile : 1.3 509 file sbin/fsdb/Makefile : 1.36 510 file sbin/newfs_ext2fs/Makefile : 1.6 511 file sbin/ping/Makefile : 1.17 512 file usr.sbin/mtrace/Makefile : 1.11 513 descr 514 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 515 internal compiler error: in change_address_1, at emit-rtl.c:2019 516 external/gpl3/gcc/dist/gcc/recog.c:770:1: 517 internal compiler error: in change_address_1, at emit-rtl.c:2019 518 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 519 internal compiler error: in change_address_1, at emit-rtl.c:2019 520 sbin/ping/ping.c:679:1: 521 internal compiler error: in change_address_1, at emit-rtl.c:2019 522 sbin/newfs_ext2fs/mke2fs.c:681:1: 523 internal compiler error: in reload_combine_note_use, 524 at postreload.c:1561 525 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 526 internal compiler error: in change_address_1, at emit-rtl.c:2019 527 usr.sbin/mtrace/mtrace.c:1655:1: 528 internal compiler error: in change_address_1, at emit-rtl.c:2019 529 kcah 530 531 hack gcc 5.4 cc1 miscompile 532 date Tue Feb 14 07:19:57 JST 2017 533 who rin 534 pr port-vax/51967 535 file external/gpl3/gcc/usr.bin/backend/Makefile : 1.35 536 descr 537 cc1 aborts due to SIGILL when compiling the sample code attached 538 to the PR. As a workaround, compile dse.c with -O0. 539 kcah 540 541 hack libssh miscompile 542 cdate Tue Feb 14 17:58:06 JST 2017 543 mdate Tue Feb 14 18:57:39 JST 2017 544 who rin 545 file crypto/external/bsd/openssh/lib/Makefile : 1.20 546 descr 547 poly1305.c and umac.c are miscompiled, which results in login 548 failure to/from external hosts via ssh. 549 kcah 550 551 hack mandoc miscompile 552 date Tue Feb 14 18:03:05 JST 2017 553 who rin 554 file external/bsd/mdocml/lib/libmandoc/Makefile : 1.8 555 descr 556 mandoc(1) receives SIGILL in in_line_argn() from mdoc_macro.c. 557 kcah 558 559 hack libX11 miscompile 560 date Thu Feb 16 10:00:22 JST 2017 561 who rin 562 file src/external/mit/xorg/lib/libX11/Makefile.libx11 : 1.18 563 descr 564 lcWrap.c is miscompiled, which results in input failure via XIM. 565 Besides, some clients, e.g., pkgsrc/x11/kterm, receive SIGSEGV. 566 kcah 567 568 port arm 569 570 hack gcc-unsigned-compare 571 cdate 09 Mar 2002 572 mdate 18 Mar 2002 573 who bjh21 574 file dist/bind/lib/nameser/ns_parse.c : 1.3 575 file dist/dhcp/minires/ns_parse.c : 1.3 576 file dist/dhcp/omapip/result.c : 1.2 577 file dist/dhcp/server/failover.c : 1.3 578 file gnu/dist/toolchain/bfd/bfd.c : 1.2 579 file gnu/dist/toolchain/bfd/format.c : 1.2 580 file gnu/dist/toolchain/gdb/target.c : 1.2 581 file sys/kern/vfs_subr.c : 1.172 582 descr When checking that a potentially-unsigned enum is >= 0, assign 583 it to an int first. This is necessary to avoid "comparison is 584 always true" warnings with -fshort-enums. Casting to an int 585 really should be enough, but turns out not to be. 586 kcah 587 588 hack gcc-4.5 arm CNAME hostname lookup failure on 589 certain DNS environment (probably -ftree-ter problem) 590 cdate Sat Dec 24 04:59:00 UTC 2011 591 mdate 592 who tsutsui 593 file lib/libc/net/Makefile.inc 1.79 594 descr Hostname lookup against CNAMEs by some commands fails 595 on certain DNS environments if lib/libc/net/gethnamaddr.c 596 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 597 are compiled with -O2, even though nslookup(1) against 598 the same CNAME returns proper hostname. 599 They works properly if compiled with -O2 -fno-tree-ter. 600 Also -O2 fails but -O2 -fno-tree-ter works on the following 601 test case in gcc bugzilla: 602 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 603 kcah 604 605 port sh3 606 607 hack gcc4-sh3-bz2 608 cdate Sun May 21 03:34:57 UTC 2006 609 mdate Fri May 16 13:13:00 UTC 2008 610 who mrg, tsutsui 611 file lib/libbz2/Makefile : 1.10 612 descr 613 The in-tree GCC 4.1-based compiler generated too-far 614 pc-relative addresses. Hack is to build with 615 -fno-loop-optimize. 616 kcah 617 618 port m68000 619 620 hack gcc4-m68000 621 cdate Fri Feb 8 10:29:37 PST 2008 622 mdate Sun May 4 15:37:19 UTC 2008 623 who mrg, tsutsui 624 file rescue/Makefile : 1.21 625 file sbin/dump_lfs/Makefile : 1.9 626 file sbin/fsck_ffs/Makefile : 1.35 627 file sbin/fsdb/Makefile : 1.22 628 file share/mk/sys.mk : 1.96 629 file usr.sbin/ndbootd/Makefile : 1.5 630 descr 631 Several internal compiler errors with gcc -O1 632 around 64bit integer arithmetic. 633 This hack uses -O1 and adds some -fno-tree-foo options 634 to avoid the problem. 635 This might be related with GCC Bugzilla Bug 32424. 636 kcah 637 638 port m68k,sh3,vax 639 640 hack gcc-4.8.1 641 cdate Wed Nov 6 20:41:35 EST 2013 642 who christos 643 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 644 descr 645 compile hashtable_c++0x.cc with -O2 instead of -Os to 646 produce missing instantiation of std::lower_bound expansion 647 for unsigned long. 648 kcah 649 650 port sparc 651 652 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 653 cdate Sun Aug 14 19:26:48 PDT 2011 654 who mrg 655 file sys/arch/sparc64/sparc/cpu.c : 1.234 656 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 657 file sys/arch/sparc64/sparc/genassym.cf : 1.67 658 file sys/arch/sparc64/sparc/locore.s : 1.265 659 descr 660 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 661 Post newlock2 there was a bug where a lock was reduced from 662 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 663 would crash due to NULL IPI. This was fixed by re-using the 664 right IPL value. However, GCC 4.5.3 build kernels have the 665 same problems. For now, the hack is re-instated. 666 kcah 667 668 669 port mips 670 671 hack mips-shared-linker-load-address 672 cdate Fri Oct 7 08:33:10 UTC 2005 673 who simonb 674 file src/sys/kern/exec_elf32.c : 1.107 675 descr 676 With COMPAT_16 or previous enabled (which enables 677 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 678 load and run at address 0. The check to fix this in 679 rev 1.107 only checks the first psection of the ELF 680 executable, which may not be loadable. A more correct 681 fix is to check the first loadable psection instead of 682 just the first psection. 683 kcah 684 685 hack mips-duplicate-ras-end-label 686 cdate Sat Sep 2 23:29:42 2006 687 who martin 688 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 689 descr 690 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 691 labels by duplicated __asm output from RAS_END() 692 macro. 693 kcah 694 695 hack mips-mcount-assembler-warning 696 cdate Tue Jul 29 14:16:52 UTC 2008 697 who lukem 698 file src/lib/libc/gmon/Makefile.inc : 1.8 699 descr 700 Workaround for PR port-mips/39192. 701 common/lib/libc/gmon/mcount.c generates a (fatal) 702 assembler warning on MIPS: 703 Warning: No .cprestore pseudo-op used in PIC code 704 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 705 kcah 706 707 port i386 708 709 hack use volatile intermediate variable to enforce rounding 710 cdate Tue Aug 1 22:15:55 MEST 2006 711 who drochner 712 file src/lib/libm/src/lrintf.c : 1.4 713 file src/lib/libm/src/s_rintf.c : 1.8 714 descr 715 gcc-4 does subsequent operations on "float" values within 716 the i387 FPU without rounding the intermediate results 717 kcah 718 719 port x86 720 hack turn off optimization for biosdisk_ll.c because otherwise 721 we are pass the wrong arguments to biosdisk_read(). 722 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 723 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 724 cdate Mon Apr 7 21:09:55 2014 UTC 725 who christos 726 file src/sys/arch/i386/stand/lib/Makefile : 1.38 727 descr 728 Turning on DISK_DEBUG shows the problem. We should find 729 out which option is causing this. 730 hcah 731 732 port powerpc 733 734 hack avoid using __builtin_return_address(0) because it fails in 735 Xorg's module loader 736 cdate Sat Sep 27 03:52:05 UTC 2008 737 who macallan 738 file src/libexec/ld.elf_so/rtld.c : 1.121 739 descr 740 workaround for PR port-macppc/37812 741 kcah 742 743 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 744 building the native compiler via build.sh those don't defined 745 properly. 746 cdate Sat Mar 12 08:00:00 UTC 2011 747 who matt 748 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h : 1.7 749 descr 750 see above 751 kcah 752 753 port powerpc64 754 755 hack include _errno.c in libposix so that __errno resolves. It 756 should resolve from libc's errno, but somehow it does not. 757 Linker bug? 758 cdate Thu Oct 27 13:19:47 EDT 2011 759 who christos 760 file src/lib/libposix/Makefile: 1.15 761 file src/lib/librt/Makefile: 1.14 762 descr 763 workaround for: 764 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 765 R_PPC64_REL24 relocation against symbol `.__errno' 766 kcah 767 768 hack rename data() function in mdocml to avoid redefined error. 769 Compiler/Assembler bug? 770 cdate Sat Oct 29 11:16:01 EDT 2011 771 who christos 772 file src/external/bsd/mdocml/tbl_data.c: 1.2 773 descr 774 workaround for: 775 {standard input}: Assembler messages: 776 {standard input}:105: Error: symbol `.data' is already \ 777 defined 778 kcah 779 780 port emips 781 782 hack Add nop between ctc1 and mtc0 to avoid assembler internal 783 error 784 cdate Sat Oct 29 16:57:34 EDT 2011 785 who christos 786 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 787 descr 788 workaround for: 789 {standard input}: Assembler messages: 790 {standard input}:730: Internal error! 791 Assertion failure in append_insn at /usr/src/external/gpl3/\ 792 binutils/dist/gas/config/tc-mips.c line 2910. 793 kcah 794 795 port ia64 796 797 hack libgcc unwind dummy function 798 cdate Fri Apr 17 14:31:03 CEST 2015 799 who martin 800 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 801 descr 802 Add an empty _Unwind_FindTableEntry() implementation. 803 In the end we will use our libc stuff, and this should 804 go away again. 805 kcah 806 807 port x68k 808 809 hack compiler error with gcc 4.5.x 810 cdate Fri May 24 13:23:01 EDT 2013 811 who christos 812 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 813 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 814 descr 815 workaround for: 816 internal compiler error: in cselib_record_set, at cselib.c:1999 817 kcah 818 819 hack fallback to /usr/bin/clang-cpp in rpcgen 820 cdate Wed Jun 5 15:49:27 CEST 2013 821 who joerg 822 file src/usr.bin/rpcgen/rpc_main.c : 1.35 823 descr 824 It is undecided which compiler owns /usr/bin/cpp and whether it should 825 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 826 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 827 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 828 kcah 829 830 port hppa 831 832 hack compiler error with gcc 4.5.x 833 cdate Tue Jul 23 07:42:28 BST 2013 834 who skrll 835 file src/sys/lib/libkern/Makefile.libkern: 1.26 836 descr 837 workaround for unanalysed codegen bug affecting md5c.c. 838 kcah 839 840 hack gdb vs _rtld_debug_state problem 841 cdate Thu Mar 5 09:49:53 UTC 2015 842 who skrll 843 file src/libexec/ld.elf_so/rtld.c: 1.175 844 descr 845 workaround for problem where gdb misses the breakpoint on 846 _rtld_debug_state when the function is only the 847 bv,n %r0(%rp) instruction - the nullify seems to 848 confuse something 849 kcah 850 851 port mips64* 852 hack compiler crashes on mips64* with optimization enabled 853 cdate Tue May 13 18:46:48 UTC 2014 854 who macallan 855 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 856 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 857 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 858 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 859 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 860 pr 48696 861 kcah 862 863 port vax 864 hack compile boot with -O1 865 cdate Sat May 24 09:40:58 CEST 2014 866 who martin 867 file src/sys/arch/vax/boot/boot/Makefile: 1.41 868 descr /boot does not work when compiled with -O2 and gcc 4.8 869 kcah 870 871 port vax 872 hack compile nir.c in gallium with -O1 873 cdate Mon Oct 28 14:39:35 EDT 2019 874 who christos 875 file /cvsroot/src/external/mit/xorg/lib/gallium/Makefile 1.36 876 descr gallium does not compile. 877 kcah 878 879 port sh3 880 hack compile parse.c in battlestar with -Wno-restrict 881 cdate Mon Oct 28 14:39:35 EDT 2019 882 who christos 883 file /cvsroot/src/games/battlestar/Makefile 1.11 884 descr fails to compile, confused by char words[][]; 885 strcpy(words[n - 1], words[n + 1]); 886 kcah 887 888 port sh3 889 hack compile ddns.c in dhcpcd with no-stringop-overflow 890 cdate Tue Oct 29 20:25:59 EDT 2019 891 who christos 892 file /cvsroot/src/external/mpl/dhcp/bin/server/Makefile 1.2 893 descr fails to compile, confused by builtin_object_size in strcat(p, ".in..") 894 kcah 895 896 port arm 897 hack avoid using labels in a 12-bit constant. 898 cdate Mon Mar 30 05:26:47 2015 UTC 899 who matt 900 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 901 descr workaround for clang misassembling an instruction 902 kcah 903 904 port sparc64 905 hack during profiling with -m32 (and ASLR) labels are not generated 906 consistently 907 cdate Sat Feb 11 04:56:37 2017 UTC 908 who christos 909 file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 910 desc asn1_krb5_asn1.po does not produce the same results during successive 911 compilation runs; it is bimodal. Turning optimization to -O0 fixes 912 the issue 913 kcah 914 915 port ia64 916 hack ski emulator crashes 917 cdate Sat Apr 8 18:10:43 2017 UTC 918 who scole 919 file /cvsroot/src/sys/external/bsd/acpica/dist/tables/tbxfload.c: 1.6 920 desc 921 ski emulator crashes during acpi detection. Added a check for 922 uninitialized index. Submitted a request for change with upstream 923 mailing list, but never got a response 924 kcah 925 926 port vax 927 hack compile rtld.c with -O0 928 cdate Wed Apr 3 17:38:38 EDT 2019 929 who christos 930 file src/libexec/ld.elf_so/Makefile: 1.141 931 descr Disable optimization for rtld.c on the vax with gcc-7. Crashes on the 932 second pass loop with elm == 0xffffffff 933 kcah 934 935 port alpha 936 hack GCC 7.4/8.3: userland binaries crash randomly (port-alpha/54307) 937 cdate Fri Nov 1 20:43:35 UTC 2019 938 who rin 939 file src/external/bsd/jemalloc/lib/Makefile.inc: 1.11 940 descr rtree.c and tcache.c need to be compiled with -O0, alternatively, 941 you can compile whole jemalloc with -DJEMALLOC_DEBUG. 942 kcah 943 944 port powerpc 945 hack compile tc.c, logerr.c, ubsan.c with -O0 for clang 946 cdate Wed Jan 29 17:40:19 EST 2020 947 who christos 948 file src/external/bsd/atf/lib/libatf-c/Makefile: 1.22 949 file src/external/bsd/dhcpcd/sbin/dhcpcd/Makefile: 1.49 950 file src/tests/lib/libc/misc/Makefile: 1.5 951 952 descr Disable optimization on tc.c, logerr.c, ubsan.c crashes: 953 lib/libLLVMCodeGen/../../llvm/../../external/apache2/llvm/lib/..\ 954 /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \ 955 function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const" 956 kcah 957 958 port earmv7hf* 959 hack compile gdb/dwarf2expr.c with -O0 for GCC8 (toolchain/54820 and 54877) 960 cdate Wed Apr 29 11:04:58 UTC 2020 961 who rin 962 file src/external/gpl3/gdb/lib/libgdb/Makefile: 1.22 963 descr GCC 8.4 miscompiles dwarf2expr.c with -O2 or -O1, which results in 964 crashes with 'gdb_exception_RETURN_MASK_ERROR'. Note that this occurs 965 only for earmv7hf{,eb} as far as I can see. Neither earmv6hf{,eb} nor 966 earmv7{,eb} (softfloat) are affected. 967 kcah 968
Indexes created Wed Nov 05 21:10:10 GMT 2025