HACKS revision 1.178
1 # $NetBSD: HACKS,v 1.178 2017/02/13 22:31:09 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 gcc-5.3 optimizes memset+malloc -> calloc inside calloc 31 mdate 4 May 2016 32 who christos 33 file external/gpl2/lib/libmalloc/lib/Makefile 1.3 -> 1.5 34 descr 35 resulting in infinite recursion; we prevent this with 36 -fno-builtin-malloc 37 kcah 38 39 hack turn off tree-vrp for parts of ufs_lookup.c 40 mdate 28 April 2016 41 who mrg christos 42 file src/sys/ufs/ufs/ufs_lookup.c : 1.144 43 pr 51094 44 descr 45 with -ftree-vrp enabled in ufs_lookup.c sometimes bad dir 46 panicks are see. 47 hcah 48 49 hack netstat ieee1394 address printing. 50 mdate 14 Nov 2000 51 who matt 52 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 53 descr 54 Because the current implementation of IP over IEEE1394, the 55 fw device address contains more than just the IEEE1394 EUI-64. 56 So when printing out IEEE1394 addresses, ignore the extra stuff. 57 kcah 58 59 hack xterm vs. libterm 60 mdate 01 Aug 2000 61 who jdc 62 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 63 pr 10383 64 descr 65 In order to extend the termcap string over 1023 bytes, a ZZ entry was 66 introduced to point to a memory location containing the full entry. 67 Without this hack, xterm will export a termcap containing the ZZ 68 entry, which will then be ignored by libterm. As xterm modifies the 69 exported termcap, this would cause those modifications to be ignored. 70 kcah 71 72 hack wi-at-big-endian-bus 73 cdate 15 Mar 2002 74 who martin 75 file dev/ic/wireg.h 76 descr Add an option to access the underlying bus in big endian byte order 77 to work around deficiencies in bus_space_{read,write}_* macros. 78 Those don't allow the implementation of a proper pcmcia bus space 79 tag. 80 kcah 81 82 hack specific knowledge of colours in curses code 83 cdate Sun Apr 6 11:05:24 BST 2003 84 who jdc 85 file lib/libcurses/color.c : r1.24 86 descr 87 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 88 Fix is to enhance libtermcap to understand terminfo-style % sequences. 89 See also: 90 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 91 kcah 92 93 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 94 cdate 21 Aug 2003 95 who he 96 file sys/miscfs/procfs/procfs_linux.c : 1.14 97 descr 98 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 99 literals/constants, but refer to variables of a type which is 100 not "unsigned long", causing compilation of procfs_linux.c to 101 fail with "makes integer from pointer without a cast". This 102 is observed on e.g. the sun3 port. Ideally the "types" for 103 symbols should be consistent across all ports. 104 kcah 105 106 hack gcc4 wrong uninitialized variable 107 mdate 10 May 2006 108 who mrg 109 file bin/ksh/eval.c : 1.6 110 file bin/sh/histedit.c : 1.39 111 file bin/sh/parser.c : 1.60 112 file crypto/dist/heimdal/kdc/524.c : 1.10 113 file crypto/dist/ssh/sftp.c : 1.20 114 file crypto/dist/ssh/ssh-keysign.c : 1.11 115 file dist/ipf/lib/hostname.c : 1.2 116 file dist/ipf/tools/ipmon.c : 1.8 117 file dist/ntp/ntpd/ntp_request.c : 1.4 118 file dist/ntp/ntpd/refclock_shm.c : 1.4 119 file dist/ntp/sntp/timing.c : 1.3 120 file dist/pppd/pppstats/pppstats.c : 1.3 121 file dist/smbfs/lib/smb/rap.c : 1.6 122 file dist/tcpdump/print-zephyr.c : 1.5 123 file distrib/utils/sysinst/aout2elf.c : 1.12 124 file gnu/libexec/uucp/uucico/uucico.c : 1.6 125 file lib/libc/citrus/citrus_csmapper.c : 1.6 126 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 127 file lib/libc/inet/inet_cidr_ntop.c : 1.3 128 file lib/libc/inet/inet_ntop.c : 1.3 129 file lib/libc/stdio/vfwprintf.c : 1.8 130 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 131 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 132 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 133 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 134 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 135 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 136 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 137 file sbin/fsck_ext2fs/dir.c : 1.19 138 file sbin/routed/rtquery/rtquery.c : 1.18 139 file sys/arch/amd64/amd64/pmap.c : 1.26 140 file sys/arch/i386/pci/piixpcib.c : 1.4 141 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 142 file sys/crypto/cast128/cast128.c : 1.9 143 file sys/ddb/db_command.c : 1.86 144 file sys/dev/cardbus/cardbus_map.c : 1.21 145 file sys/dev/fss.c : 1.25 146 file sys/dev/ic/igsfb.c : 1.39 147 file sys/dev/ic/mb86950.c : 1.5 148 file sys/dev/ic/midway.c : 1.71 149 file sys/dev/kttcp.c : 1.18 150 file sys/dev/rasops/rasops_bitops.h : 1.9 151 file sys/dev/pci/cmpci.c : 1.31 152 file sys/dev/pci/machfb.c : 1.45 153 file sys/dev/usb/ohci.c : 1.174 154 file sys/dev/usb/uhci.c : 1.196 155 file sys/dev/rasops/rasops_bitops.h : 1.9 156 file sys/dist/ipf/netinet/ip_nat.c : 1.10 157 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 158 file sys/dist/pf/net/pf.c : 1.22 159 file sys/fs/udf/udf_vnops.c : 1.4 160 file sys/kern/kern_sig.c : 1.219 161 file sys/kern/tty.c : 1.181 162 file sys/net/bpf.c : 1.116 163 file sys/net/zlib.c : 1.26 164 file sys/netccitt/if_x25subr.c : 1.37 165 file sys/netinet/in.c : 1.107 166 file sys/netsmb/smb_smb.c : 1.27 167 file sys/netsmb/smb_trantcp.c : 1.22 168 file sys/nfs/nfs_serv.c : 1.108 169 file sys/nfs/nfs_socket.c : 1.129 170 file sys/nfs/nfs_syscalls.c : 1.91 171 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 172 file usr.bin/ftp/ftp.c : 1.140 173 file usr.bin/find/function.c : 1.54 174 file usr.bin/mail/tty.c : 1.20 175 file usr.bin/msgc/msg_sys.def : 1.33-1.34 176 file usr.bin/nl/nl.c : 1.7 177 file usr.bin/systat/keyboard.c : 1.23 178 file usr.bin/usbhidctl/usbhid.c : 1.29 179 file usr.bin/vi/cl/cl_read.c : 1.5 180 file usr.bin/vi/ex/ex_cscope.c : 1.12 181 file usr.bin/vi/ex/ex_tag.c : 1.19 182 file usr.bin/vi/vi/v_txt.c : 1.15 183 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 184 file usr.sbin/cron/do_command.c : 1.19 185 file usr.sbin/timed/timed/slave.c : 1.15 186 descr 187 GCC 4.1 gets many uninitialised variable warnings wrong. We should 188 really audit all the old hacks like this when older compilers are 189 removed from the tree, as many are probably no longer required. 190 The problem is that it does not recognize initialization via function 191 call pointer. I.e. 192 int p; 193 foo(&p); 194 does not mark p as initialized. 195 kcah 196 197 hack gcc4 pointer sign and strict aliasing problems 198 mdate 10 May 2006 199 who mrg 200 file bin/ed/Makefile : 1.33 201 file distrib/utils/sysinst/Makefile.inc : 1.44 202 file distrib/utils/x_dhclient/Makefile : 1.15 203 file games/bcd/Makefile : 1.5 204 file games/dab/Makefile : 1.5 205 file games/larn/Makefile : 1.17 206 file games/pom/Makefile : 1.5 207 file lib/libasn1/Makefile : 1.26 208 file lib/libcrypt/Makefile : 1.17 209 file lib/libgssapi/Makefile : 1.16 210 file lib/libhdb/Makefile : 1.20 211 file lib/libkadm5clnt/Makefile : 1.21 212 file lib/libkadm5srv/Makefile : 1.25 213 file lib/libkrb5/Makefile : 1.35 214 file lib/libssh/Makefile : 1.6 215 file lib/libtelnet/Makefile : 1.26 216 file libexec/getty/Makefile : 1.14 217 file libexec/kadmind/Makefile : 1.19 218 file libexec/kpasswdd/Makefile : 1.14 219 file sbin/atactl/Makefile : 1.3 220 file sbin/cgdconfig/Makefile : 1.7 221 file sbin/clri/Makefile : 1.13 222 file sbin/dkctl/Makefile : 1.4 223 file sbin/dump/Makefile : 1.33 224 file sbin/fdisk/Makefile : 1.35 225 file sbin/fsck_ext2fs/Makefile : 1.11 226 file sbin/fsck_ffs/Makefile : 1.29 227 file sbin/fsdb/Makefile : 1.18 228 file sbin/mount_smbfs/Makefile : 1.4 229 file sbin/newfs/Makefile : 1.30 230 file sbin/newfs_sysvbfs/Makefile : 1.2 231 file sbin/restore/Makefile : 1.23 232 file sbin/veriexecctl/Makefile : 1.11 233 file sys/lib/libsa/Makefile : 1.59 234 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 235 file usr.bin/awk/Makefile : 1.9 236 file usr.bin/crontab/Makefile : 1.24 237 file usr.bin/ctags/Makefile : 1.8 238 file usr.bin/gzip/Makefile : 1.10 239 file usr.bin/ssh/sftp/Makefile : 1.10 240 file usr.bin/ssh/ssh/Makefile : 1.25 241 file usr.bin/vi/build/Makefile : 1.26 242 file usr.bin/telnet/Makefile : 1.40 243 file usr.bin/tn3270/tn3270/Makefile : 1.36 244 file usr.bin/tr/Makefile : 1.4 245 file usr.sbin/amd/amd/Makefile : 1.27 246 file usr.sbin/amd/amq/Makefile : 1.14 247 file usr.sbin/amd/libamu/Makefile : 1.20 248 file usr.sbin/amd/pawd/Makefile : 1.5 249 file usr.sbin/bind/Makefile.inc : 1.22 250 file usr.sbin/bind/libdns/Makefile : 1.3 251 file usr.sbin/bind/named/Makefile : 1.17 252 file usr.sbin/bootp/bootptest/Makefile : 1.2 253 file usr.sbin/chrtbl/Makefile : 1.6 254 file usr.sbin/cron/Makefile : 1.12 255 file usr.sbin/dhcp/Makefile.inc : 1.20 256 file usr.sbin/hprop/Makefile : 1.13 257 file usr.sbin/installboot/Makefile : 1.35 258 file usr.sbin/ipf/ipftest/Makefile : 1.32 259 file usr.sbin/isdn/isdnd/Makefile : 1.6 260 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 261 file usr.sbin/isdn/isdntel/Makefile : 1.2 262 file usr.sbin/isdn/isdntrace/Makefile : 126 263 file usr.sbin/mopd/common/Makefile : 1.10 264 file usr.sbin/mopd/mopd/Makefile : 1.9 265 file usr.sbin/mopd/mopprobe/Makefile : 1.7 266 file usr.sbin/makefs/Makefile : 1.17 267 file usr.sbin/mscdlabel/Makefile : 1.5 268 file usr.sbin/pkg_install/add/Makefile : 1.7 269 file usr.sbin/pkg_install/create/Makefile : 1.5 270 file usr.sbin/pkg_install/lib/Makefile : 1.28 271 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 272 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 273 file usr.sbin/pppd/Makefile.inc : 1.3 274 file usr.sbin/pppd/pppd/Makefile : 1.38 275 file usr.sbin/rarpd/Makefile : 1.10 276 file usr.sbin/rbootd/Makefile : 1.10 277 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 278 file usr.sbin/tcpdump/Makefile : 1.42 279 descr 280 GCC 4.1 warns on pointer sign comparision/assignments and lots of 281 code does not conform. For now we use -Wno-pointer-sign and 282 -fno-strict-aliasing. 283 kcah 284 285 hack disable ctf for gcc-4.8 build 286 mdate April 3 2014 287 who christos 288 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 289 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 290 descr 291 nbctfconvert -g -L VERSION -g fold-const.o 292 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 293 ((null)) <13532> 294 kcak 295 296 hack emacs aborting on exit (libgcc issue) 297 mdate 7 November 2011 298 who christos 299 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 300 descr 301 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 302 to do just that. If the symbol requested is not found, then it aborts. 303 emacs 23.3 triggers this assertion. For now disable aborting, and 304 silently ignore. 305 kcah 306 307 hack cross-building hack on Darwin 308 mdate 20 July 2008 309 who agc 310 file src/distrib/common/Makefile.mdset : 1.33 311 descr 312 Darwin has problems with getopt() when used in mdsetimage -v, 313 due to the difference between BSD and libiberty() getopt 314 implementations, more fully described in 315 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 316 and the subsequent thread. For just now, we just have an ugly 317 workaround not to call mdsetimage with the -v argument on Darwin 318 kcah 319 320 hack avoid rebuilding asn1 libraries 321 mdate 03 August 2008 322 who veego 323 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 324 file src/lib/libasn1/Makefile : 1.32 325 file src/lib/libhdb/Makefile : 1.23 326 file src/lib/libgssapi/Makefile : 1.20 327 file src/lib/libhx509/Makefile : 1.3 328 pr 9702 39185 329 descr 330 asn1_compile does not check if generated header files do not have to 331 be rebuild. 332 Generate .hx files and copy it in the Makefiles if they changed. 333 kcah 334 335 hack MKPIE ldscript for /usr.sbin/crash 336 cdate 22 April 2010 337 who christos 338 file src/usr.sbin/crash/Makefile : 1.5 339 file src/usr.sbin/crash/ldscript.crash : 1.1 340 pr N/A 341 descr 342 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 343 sections 344 kcah 345 346 hack Disable fortification for /usr/bin/makeinfo 347 cdata 24 Mar 2014 348 who tron 349 file src/gnu/usr.bin/texinfo/makeinfo/Makefile : 1.8 350 pr N/A 351 descr 352 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 353 it fails to process certain texinfo files, e.g. "cl.texi" 354 included in the Emacs 24.3 distribution. 355 kcah 356 357 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 358 cdata 05 Apr 2014 359 who tron 360 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 361 pr N/A 362 descr 363 If "xauth" is compile with "USE_SSP" set to "yes" it fails 364 mysteriously with an error message like this: 365 366 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 367 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 368 369 The compiler seems to get confused about the two filename variables 370 used in the link(2) system call. 371 kcah 372 373 hack g++ 5.x barfs on volatile in constexpr initializers 374 cdata 27 Aug 2015 375 who pooka 376 file src/lib/libpthread/pthread_types.h : 1.17 377 pr lib/49989 378 descr 379 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 380 in C++ results in: 381 error: temporary of non-literal type '__pthread_mutex_st' 382 in a constant expression 383 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 384 [...] 385 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 386 not literal because: 387 struct __pthread_mutex_st { 388 ^ 389 include/pthread_types.h:103:17: note: non-static data 390 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 391 pthread_spin_t ptm_errorcheck; 392 kcah 393 394 hack libm cabs{,f,l} and g++ 395 cdata 11 Jan 2016 396 who christos 397 pr lib/50646 398 file src/external/gpl3/gcc.old/dist/libstdc++-v3/include/std/complex : 1.2 399 file src/external/gpl3/gcc/dist/libstdc++-v3/include/std/complex : 1.2 400 descr 401 Our cabs and cabsf have a different argument format on some architectures 402 and for that we have created in libm/compat_cabs{,f}.c. The standard 403 versions in libc are __c99_cabs{,f,l} and there are __RENAME()'s in 404 <complex.h>. G++ uses __builtin_cabs{,f,l} to implement those and they 405 translate by default to cabs{,f,l} which gets defined to cabs{,f} (the 406 wrong function) and an undefined cabsl. I've changed <complex> to use 407 the __c99_cabs{,f,l} directly. Using the __builtin_cabs{,f,l} in gcc is 408 still broken. 409 kcah 410 411 port vax 412 413 hack gcc4/vax ICE 414 cdate 415 who tsutsui 416 file sys/arch/vax/conf/Makefile.vax 417 descr 418 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 419 -fno-tree-ter prevents it so add it to COPTS. 420 kcah 421 422 hack gcc4/vax compiler crash 423 cdate Fri Jun 30 22:39:12 PDT 2006 424 who mrg 425 file bin/csh/Makefile : 1.27 426 file lib/i18n_module/UTF7/Makefile : 1.2 427 descr 428 GCC4 on vax crashes. -O0 stops it happening so far... 429 kcah 430 431 hack declare boolean_t in two IPF user-mode programs 432 cdate Tue Mar 7 19:19:20 CET 2006 433 who he 434 file dist/ipf/ipsend/iptests.c : 1.8 435 dist/ipf/ipsend/sock.c : 1.7 436 descr 437 The IPF user-mode programs ipsend and iptest first 438 include <sys/types.h> without _KERNEL defined, and 439 later include <sys/file.h> with _KERNEL defined. 440 This causes a build failure when building for vax, 441 since <sys/device.h> ends up being included without 442 bollean_t being defined by <sys/types.h>. 443 Build failure and further details documented in 444 PR#32907. 445 kcah 446 447 hack pcc 0.9.9 large string literals 448 cdat 8 July 2008 449 who gmcgarry 450 file sys/conf/param.c : 1.58 451 descr 452 Workaround for pcc 0.9.9 not handling large string literals 453 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 454 fail compilation. 455 There is a proposal on the pcc mailing list to stuff config 456 file in ELF section. 457 kcah 458 459 hack xorg warnings 460 cdat 30 July 2008, 3 June, 2013 461 who mrg 462 file external/mit/xorg/lib/libSM/Makefile : 1.2 463 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 464 external/mit/xorg/lib/libXext/Makefile : 1.2 465 external/mit/xorg/lib/libXfont/Makefile : 1.2 466 descr 467 Disable several warnings or use -Wno-error across Xorg sources 468 while we get them working 469 kcah 470 471 hack 32 bit time leftovers 472 cdat 11 January 2009 473 who christos 474 file lib/libc/time/localtime.c : 1.41 475 lib/libc/time/zic.c : 1.23 476 descr 477 The timezone compiled files still contain 32 bit time_t 478 quantities. I did not want to version the files because 479 the ``parser'' is too ugly for words. What needs to be 480 done, is to rewrite the parser from scratch also to avoid 481 potential core-dumps from parsing invalid files. 482 kcah 483 484 hack 32 bit time leftovers 485 cdat 11 January 2009 486 who christos 487 file various 488 descr 489 Many filesystem on-disk formats have 32 bit times. 490 kcah 491 492 hack gcc 4.5 fsdb miscompile 493 date Sat Nov 9 11:03:02 EST 2013 494 who christos 495 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 496 descr 497 src/sbin/fsdb/fsdb.c: In function 'findblk': 498 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 499 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 500 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 501 (const_int 8 [0x8])) 502 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 503 -1 (nil)) 504 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 505 extract_insn, at recog.c:2103 506 kcah 507 508 hack gcc 4.8 gcc miscompiles 509 date Sat Nov 9 16:35:18 EST 2013 510 who christos 511 file distrib/utils/x_ping/Makefile 512 file distrib/vax/miniroot/Makefile.inc 513 file distrib/vax/ramdisk/Makefile 514 file external/gpl3/gdb/lib/libdecnumber/Makefile 515 file sbin/fsdb/Makefile 516 file sbin/newfs_ext2fs/Makefile 517 file sbin/ping/Makefile 518 file usr.sbin/lmcconfig/Makefile 519 file usr.sbin/mtrace/Makefile 520 descr 521 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 522 internal compiler error: in change_address_1, at emit-rtl.c:2019 523 external/gpl3/gcc/dist/gcc/recog.c:770:1: 524 internal compiler error: in change_address_1, at emit-rtl.c:2019 525 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 526 internal compiler error: in change_address_1, at emit-rtl.c:2019 527 sbin/ping/ping.c:679:1: 528 internal compiler error: in change_address_1, at emit-rtl.c:2019 529 sbin/newfs_ext2fs/mke2fs.c:681:1: 530 internal compiler error: in reload_combine_note_use, 531 at postreload.c:1561 532 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 533 internal compiler error: in change_address_1, at emit-rtl.c:2019 534 usr.sbin/lmcconfig/lmcconfig.c:939:3: 535 internal compiler error: in reload_combine_note_use, 536 at postreload.c:1561 537 usr.sbin/mtrace/mtrace.c:1655:1: 538 internal compiler error: in change_address_1, at emit-rtl.c:2019 539 kcah 540 541 hack gcc 5.4 cc1 miscompile 542 date Tue Feb 14 07:19:57 JST 2017 543 who rin 544 pr port-vax/51967 545 file external/gpl3/gcc/usr.bin/backend/Makefile : 1.35 546 descr 547 cc1 aborts due to SIGILL when compiling the sample code attached 548 to the PR. As a workaround, compile dse.c with -O0. 549 kcah 550 551 port arm 552 553 hack gcc-unsigned-compare 554 cdate 09 Mar 2002 555 mdate 18 Mar 2002 556 who bjh21 557 file dist/bind/lib/nameser/ns_parse.c : 1.3 558 file dist/dhcp/minires/ns_parse.c : 1.3 559 file dist/dhcp/omapip/result.c : 1.2 560 file dist/dhcp/server/failover.c : 1.3 561 file gnu/dist/toolchain/bfd/bfd.c : 1.2 562 file gnu/dist/toolchain/bfd/format.c : 1.2 563 file gnu/dist/toolchain/gdb/target.c : 1.2 564 file sys/kern/vfs_subr.c : 1.172 565 descr When checking that a potentially-unsigned enum is >= 0, assign 566 it to an int first. This is necessary to avoid "comparison is 567 always true" warnings with -fshort-enums. Casting to an int 568 really should be enough, but turns out not to be. 569 kcah 570 571 hack gcc-4.5 arm CNAME hostname lookup failure on 572 certain DNS environment (probably -ftree-ter problem) 573 cdate Sat Dec 24 04:59:00 UTC 2011 574 mdate 575 who tsutsui 576 file lib/libc/net/Makefile.inc 1.79 577 descr Hostname lookup against CNAMEs by some commands fails 578 on certain DNS environments if lib/libc/net/gethnamaddr.c 579 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 580 are compiled with -O2, even though nslookup(1) against 581 the same CNAME returns proper hostname. 582 They works properly if compiled with -O2 -fno-tree-ter. 583 Also -O2 fails but -O2 -fno-tree-ter works on the following 584 test case in gcc bugzilla: 585 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 586 kcah 587 588 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 589 cdate Wed Nov 14 13:02:02 JST 2012 590 who msaitoh 591 file lib/libc/softfloat/Makefile.inc 592 pr 46953 593 regress src/tests/lib/libm/t_cbrt 594 regress src/tests/lib/libm/t_ceil 595 regress src/tests/lib/libm/t_exp 596 regress src/tests/lib/libm/t_log 597 regress src/tests/lib/libm/t_scalbn 598 regress src/tests/lib/libm/t_sinh 599 regress src/tests/lib/libm/t_sqrt 600 descr Gcc has a bug in tree optimization. For adddf3, 601 -INF + -INF returns 0 without -fno-tree-vrp. 602 Debugging with -fdump-tree-all shows that 603 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 604 is broken. 605 kcah 606 607 port sh3 608 609 hack gcc4-sh3-bz2 610 cdate Sun May 21 03:34:57 UTC 2006 611 mdate Fri May 16 13:13:00 UTC 2008 612 who mrg, tsutsui 613 file lib/libbz2/Makefile : 1.10 614 descr 615 The in-tree GCC 4.1-based compiler generated too-far 616 pc-relative addresses. Hack is to build with 617 -fno-loop-optimize. 618 kcah 619 620 port sh3eb 621 hack gcc4.8.1 622 cdate Thu Nov 7 16:31:23 EST 2013 623 who christos 624 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 625 desrc 626 for profiling 627 compile l2cap_signal.c with -O0 to avoid: 628 ./netbt/l2cap_signal.c:36: 629 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 630 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 631 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 632 impossible reload 633 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 634 kcah 635 636 port sh3el 637 hack gcc4.8.1 638 cdate Fri Nov 8 19:27:01 EST 2013 639 who christos 640 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 641 desrc 642 for profiling 643 compile evdns.c with -O0 to avoid: 644 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 645 impossible reload 646 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 647 kcah 648 649 hack gcc4.8.1 650 cdate Fri Nov 8 19:34:48 EST 2013 651 who christos 652 file src/usr.sbin/racoon/Makefile : 1.27 653 desrc 654 for profiling 655 compile ipsec_doi.c with -O0 to avoid: 656 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 657 impossible reload 658 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 659 kcah 660 661 port m68000 662 663 hack gcc4-m68000 664 cdate Fri Feb 8 10:29:37 PST 2008 665 mdate Sun May 4 15:37:19 UTC 2008 666 who mrg, tsutsui 667 file rescue/Makefile : 1.21 668 file sbin/dump_lfs/Makefile : 1.9 669 file sbin/fsck_ffs/Makefile : 1.35 670 file sbin/fsdb/Makefile : 1.22 671 file share/mk/sys.mk : 1.96 672 file usr.sbin/ndbootd/Makefile : 1.5 673 descr 674 Several internal compiler errors with gcc -O1 675 around 64bit integer arithmetic. 676 This hack uses -O1 and adds some -fno-tree-foo options 677 to avoid the problem. 678 This might be related with GCC Bugzilla Bug 32424. 679 kcah 680 681 port m68k,sh3,vax 682 683 hack gcc-4.8.1 684 cdate Wed Nov 6 20:41:35 EST 2013 685 who christos 686 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 687 descr 688 compile hashtable_c++0x.cc with -O2 instead of -Os to 689 produce missing instantiation of std::lower_bound expansion 690 for unsigned long. 691 kcah 692 693 port sparc 694 695 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 696 cdate Sun Aug 14 19:26:48 PDT 2011 697 who mrg 698 file sys/arch/sparc64/sparc/cpu.c : 1.234 699 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 700 file sys/arch/sparc64/sparc/genassym.cf : 1.67 701 file sys/arch/sparc64/sparc/locore.s : 1.265 702 descr 703 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 704 Post newlock2 there was a bug where a lock was reduced from 705 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 706 would crash due to NULL IPI. This was fixed by re-using the 707 right IPL value. However, GCC 4.5.3 build kernels have the 708 same problems. For now, the hack is re-instated. 709 kcah 710 711 712 port mips 713 714 hack mips-shared-linker-load-address 715 cdate Fri Oct 7 08:33:10 UTC 2005 716 who simonb 717 file src/sys/kern/exec_elf32.c : 1.107 718 descr 719 With COMPAT_16 or previous enabled (which enables 720 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 721 load and run at address 0. The check to fix this in 722 rev 1.107 only checks the first psection of the ELF 723 executable, which may not be loadable. A more correct 724 fix is to check the first loadable psection instead of 725 just the first psection. 726 kcah 727 728 hack mips-duplicate-ras-end-label 729 cdate Sat Sep 2 23:29:42 2006 730 who martin 731 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 732 descr 733 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 734 labels by duplicated __asm output from RAS_END() 735 macro. 736 kcah 737 738 hack mips-mcount-assembler-warning 739 cdate Tue Jul 29 14:16:52 UTC 2008 740 who lukem 741 file src/lib/libc/gmon/Makefile.inc : 1.8 742 descr 743 Workaround for PR port-mips/39192. 744 common/lib/libc/gmon/mcount.c generates a (fatal) 745 assembler warning on MIPS: 746 Warning: No .cprestore pseudo-op used in PIC code 747 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 748 kcah 749 750 port i386 751 752 hack use volatile intermediate variable to enforce rounding 753 cdate Tue Aug 1 22:15:55 MEST 2006 754 who drochner 755 file src/lib/libm/src/lrintf.c : 1.4 756 file src/lib/libm/src/s_rintf.c : 1.8 757 descr 758 gcc-4 does subsequent operations on "float" values within 759 the i387 FPU without rounding the intermediate results 760 kcah 761 762 port x86 763 hack turn off optimization for biosdisk_ll.c because otherwise 764 we are pass the wrong arguments to biosdisk_read(). 765 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 766 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 767 who christos 768 file src/sys/arch/i386/stand/lib/Makefile : 1.38 769 descr 770 Turning on DISK_DEBUG shows the problem. We should find 771 out which option is causing this. 772 hcah 773 774 port powerpc 775 776 hack avoid using __builtin_return_address(0) because it fails in 777 Xorg's module loader 778 cdate Sat Sep 27 03:52:05 UTC 2008 779 who macallan 780 file src/libexec/ld.elf_so/rtld.c : 1.121 781 descr 782 workaround for PR port-macppc/37812 783 kcah 784 785 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 786 building the native compiler via build.sh those don't defined 787 properly. 788 cdate Sat Mar 12 08:00:00 UTC 2011 789 who matt 790 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 791 descr 792 see above 793 kcah 794 795 port powerpc64 796 797 hack include _errno.c in libposix so that __errno resolves. It 798 should resolve from libc's errno, but somehow it does not. 799 Linker bug? 800 cdate Thu Oct 27 13:19:47 EDT 2011 801 who christos 802 file src/lib/libposix/Makefile: 1.15 803 file src/lib/librt/Makefile: 1.14 804 descr 805 workaround for: 806 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 807 R_PPC64_REL24 relocation against symbol `.__errno' 808 kcah 809 810 hack rename data() function in mdocml to avoid redefined error. 811 Compiler/Assembler bug? 812 cdate Sat Oct 29 11:16:01 EDT 2011 813 who christos 814 file src/external/bsd/mdocml/tbl_data.c: 1.2 815 descr 816 workaround for: 817 {standard input}: Assembler messages: 818 {standard input}:105: Error: symbol `.data' is already \ 819 defined 820 kcah 821 822 port emips 823 824 hack Add nop between ctc1 and mtc0 to avoid assembler internal 825 error 826 cdate Sat Oct 29 16:57:34 EDT 2011 827 who christos 828 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 829 descr 830 workaround for: 831 {standard input}: Assembler messages: 832 {standard input}:730: Internal error! 833 Assertion failure in append_insn at /usr/src/external/gpl3/\ 834 binutils/dist/gas/config/tc-mips.c line 2910. 835 kcah 836 837 port ia64 838 839 hack libc hesiod.c file does not compile with -O2 (internal 840 compiler error in gcc 4.5.3) 841 cdate Thu Dec 27 08:05:43 CET 2012 842 who martin 843 file src/lib/libc/net/Makefile.inc: 1.82 844 descr 845 workaround for: 846 {standard input}: Assembler messages: 847 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 848 {standard input}:1506: Warning: This is the location of the conflicting usage 849 {standard input}: Error: 2 warnings, treating warnings as errors 850 kcah 851 852 hack libelf libelf_extended.c compiler error in gcc 4.5.3 853 cdate Thu Dec 27 09:05:51 CET 2012 854 who martin 855 file src/external/bsd/libelf/lib/Makefile: 1.3 856 descr 857 workaround for: 858 {standard input}: Assembler messages: 859 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 860 {standard input}:87: Warning: Only the first path encountering the conflict is reported 861 {standard input}:85: Warning: This is the location of the conflicting usage 862 kcah 863 864 hack compiler error with gcc 4.5.x 865 cdate Thu Dec 27 15:15:25 CET 2012 866 who martin 867 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 868 descr 869 workaround for: 870 {standard input}: Assembler messages: 871 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 872 {standard input}:22978: Warning: This is the location of the conflicting usage 873 kcah 874 875 hack libgcc unwind dummy function 876 cdate Fri Apr 17 14:31:03 CEST 2015 877 who martin 878 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 879 descr 880 Add an empty _Unwind_FindTableEntry() implementation. 881 In the end we will use our libc stuff, and this should 882 go away again. 883 kcah 884 885 port x68k 886 887 hack compiler error with gcc 4.5.x 888 cdate Fri May 24 13:23:01 EDT 2013 889 who christos 890 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 891 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 892 descr 893 workaround for: 894 internal compiler error: in cselib_record_set, at cselib.c:1999 895 kcah 896 897 hack fallback to /usr/bin/clang-cpp in rpcgen 898 cdate Wed Jun 5 15:49:27 CEST 2013 899 who joerg 900 file src/usr.bin/rpcgen/rpc_main.c 901 descr 902 It is undecided which compiler owns /usr/bin/cpp and whether it should 903 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 904 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 905 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 906 kcah 907 908 port hppa 909 910 hack compiler error with gcc 4.5.x 911 cdate Tue Jul 23 07:42:28 BST 2013 912 who skrll 913 file src/sys/lib/libkern/Makefile.libkern: 1.26 914 descr 915 workaround for unanalysed codegen bug affecting md5c.c. 916 kcah 917 918 hack gdb vs _rtld_debug_state problem 919 cdate Thu Mar 5 09:49:53 UTC 2015 920 who skrll 921 file src/libexec/ld.elf_so/rtld.c: 1.175 922 descr 923 workaround for problem where gdb misses the breakpoint on 924 _rtld_debug_state when the function is only the 925 bv,n %r0(%rp) instruction - the nullify seems to 926 confuse something 927 kcah 928 929 port mips64* 930 hack compiler crashes on mips64* with optimization enabled 931 cdate Tue May 13 18:46:48 UTC 2014 932 who macallan 933 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 934 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 935 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 936 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 937 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 938 pr 48696 939 kcah 940 941 port vax 942 hack compile boot with -O1 943 cdate Sat May 24 09:40:58 CEST 2014 944 who martin 945 file src/sys/arch/vax/boot/boot/Makefile: 1.41 946 descr /boot does not work when compiled with -O2 and gcc 4.8 947 kcah 948 949 port arm 950 hack avoid using labels in a 12-bit constant. 951 who matt 952 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 953 descr workaround for clang misassembling an instruction 954 kcah 955 956 port sparc64 957 hack during profiling with -m32 (and ASLR) labels are not generated 958 consistently 959 who christos 960 file /cvsroot/src/crypto/external/bsd/heimdal/lib/libasn1/Makefile: 1.4 961 desc asn1_krb5_asn1.po does not produce the same results during successive 962 compilation runs; it is bimodal. Turning optimization to -O0 fixes 963 the issue 964 kcah 965
Indexes created Wed Nov 05 19:10:08 GMT 2025