HACKS revision 1.162
1 # $NetBSD: HACKS,v 1.162 2015/08/27 12:32:05 pooka 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 netstat ieee1394 address printing. 31 mdate 14 Nov 2000 32 who matt 33 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 34 descr 35 Because the current implementation of IP over IEEE1394, the 36 fw device address contains more than just the IEEE1394 EUI-64. 37 So when printing out IEEE1394 addresses, ignore the extra stuff. 38 kcah 39 40 hack xterm vs. libterm 41 mdate 01 Aug 2000 42 who jdc 43 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 44 pr 10383 45 descr 46 In order to extend the termcap string over 1023 bytes, a ZZ entry was 47 introduced to point to a memory location containing the full entry. 48 Without this hack, xterm will export a termcap containing the ZZ 49 entry, which will then be ignored by libterm. As xterm modifies the 50 exported termcap, this would cause those modifications to be ignored. 51 kcah 52 53 hack wi-at-big-endian-bus 54 cdate 15 Mar 2002 55 who martin 56 file dev/ic/wireg.h 57 descr Add an option to access the underlying bus in big endian byte order 58 to work around deficiencies in bus_space_{read,write}_* macros. 59 Those don't allow the implementation of a proper pcmcia bus space 60 tag. 61 kcah 62 63 hack specific knowledge of colours in curses code 64 cdate Sun Apr 6 11:05:24 BST 2003 65 who jdc 66 file lib/libcurses/color.c : r1.24 67 descr 68 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 69 Fix is to enhance libtermcap to understand terminfo-style % sequences. 70 See also: 71 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 72 kcah 73 74 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 75 cdate 21 Aug 2003 76 who he 77 file sys/miscfs/procfs/procfs_linux.c : 1.14 78 descr 79 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 80 literals/constants, but refer to variables of a type which is 81 not "unsigned long", causing compilation of procfs_linux.c to 82 fail with "makes integer from pointer without a cast". This 83 is observed on e.g. the sun3 port. Ideally the "types" for 84 symbols should be consistent across all ports. 85 kcah 86 87 hack gcc-strict-aliasing 88 cdate 6 August 2004 89 who junyoung 90 pr 26516 91 file src/usr.sbin/racoon/racoon/Makefile : 1.21 92 descr 93 GCC issues a warning "dereferencing type-punned pointer will break 94 strict-aliasing rules" when compiling 95 crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this 96 is due to use of type casting in a non-standard way in the code and 97 not a compiler bug. Once a new release of KAME with a proper fix 98 applied is imported this should be backed out. 99 kcah 100 101 hack gcc4 wrong uninitialized variable 102 mdate 10 May 2006 103 who mrg 104 file bin/ksh/eval.c : 1.6 105 file bin/sh/histedit.c : 1.39 106 file bin/sh/parser.c : 1.60 107 file crypto/dist/heimdal/kdc/524.c : 1.10 108 file crypto/dist/ssh/sftp.c : 1.20 109 file crypto/dist/ssh/ssh-keysign.c : 1.11 110 file dist/ipf/lib/hostname.c : 1.2 111 file dist/ipf/tools/ipmon.c : 1.8 112 file dist/ntp/ntpd/ntp_request.c : 1.4 113 file dist/ntp/ntpd/refclock_shm.c : 1.4 114 file dist/ntp/sntp/timing.c : 1.3 115 file dist/pppd/pppstats/pppstats.c : 1.3 116 file dist/smbfs/lib/smb/rap.c : 1.6 117 file dist/tcpdump/print-zephyr.c : 1.5 118 file distrib/utils/sysinst/aout2elf.c : 1.12 119 file gnu/libexec/uucp/uucico/uucico.c : 1.6 120 file lib/libc/citrus/citrus_csmapper.c : 1.6 121 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 122 file lib/libc/inet/inet_cidr_ntop.c : 1.3 123 file lib/libc/inet/inet_ntop.c : 1.3 124 file lib/libc/stdio/vfwprintf.c : 1.8 125 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 126 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 127 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 128 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 129 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 130 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 131 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 132 file sbin/fsck_ext2fs/dir.c : 1.19 133 file sbin/routed/rtquery/rtquery.c : 1.18 134 file sys/arch/amd64/amd64/pmap.c : 1.26 135 file sys/arch/i386/pci/piixpcib.c : 1.4 136 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 137 file sys/crypto/cast128/cast128.c : 1.9 138 file sys/ddb/db_command.c : 1.86 139 file sys/dev/cardbus/cardbus_map.c : 1.21 140 file sys/dev/fss.c : 1.25 141 file sys/dev/ic/igsfb.c : 1.39 142 file sys/dev/ic/mb86950.c : 1.5 143 file sys/dev/ic/midway.c : 1.71 144 file sys/dev/kttcp.c : 1.18 145 file sys/dev/rasops/rasops_bitops.h : 1.9 146 file sys/dev/pci/cmpci.c : 1.31 147 file sys/dev/pci/machfb.c : 1.45 148 file sys/dev/usb/ohci.c : 1.174 149 file sys/dev/usb/uhci.c : 1.196 150 file sys/dev/rasops/rasops_bitops.h : 1.9 151 file sys/dist/ipf/netinet/ip_nat.c : 1.10 152 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 153 file sys/dist/pf/net/pf.c : 1.22 154 file sys/fs/udf/udf_vnops.c : 1.4 155 file sys/kern/kern_sig.c : 1.219 156 file sys/kern/tty.c : 1.181 157 file sys/net/bpf.c : 1.116 158 file sys/net/zlib.c : 1.26 159 file sys/netccitt/if_x25subr.c : 1.37 160 file sys/netinet/in.c : 1.107 161 file sys/netsmb/smb_smb.c : 1.27 162 file sys/netsmb/smb_trantcp.c : 1.22 163 file sys/nfs/nfs_serv.c : 1.108 164 file sys/nfs/nfs_socket.c : 1.129 165 file sys/nfs/nfs_syscalls.c : 1.91 166 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 167 file usr.bin/ftp/ftp.c : 1.140 168 file usr.bin/find/function.c : 1.54 169 file usr.bin/mail/tty.c : 1.20 170 file usr.bin/msgc/msg_sys.def : 1.33-1.34 171 file usr.bin/nl/nl.c : 1.7 172 file usr.bin/systat/keyboard.c : 1.23 173 file usr.bin/usbhidctl/usbhid.c : 1.29 174 file usr.bin/vi/cl/cl_read.c : 1.5 175 file usr.bin/vi/ex/ex_cscope.c : 1.12 176 file usr.bin/vi/ex/ex_tag.c : 1.19 177 file usr.bin/vi/vi/v_txt.c : 1.15 178 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 179 file usr.sbin/cron/do_command.c : 1.19 180 file usr.sbin/timed/timed/slave.c : 1.15 181 descr 182 GCC 4.1 gets many uninitialised variable warnings wrong. We should 183 really audit all the old hacks like this when older compilers are 184 removed from the tree, as many are probably no longer required. 185 The problem is that it does not recognize initialization via function 186 call pointer. I.e. 187 int p; 188 foo(&p); 189 does not mark p as initialized. 190 kcah 191 192 hack gcc4 pointer sign and strict aliasing problems 193 mdate 10 May 2006 194 who mrg 195 file bin/ed/Makefile : 1.33 196 file distrib/utils/sysinst/Makefile.inc : 1.44 197 file distrib/utils/x_dhclient/Makefile : 1.15 198 file games/bcd/Makefile : 1.5 199 file games/dab/Makefile : 1.5 200 file games/larn/Makefile : 1.17 201 file games/pom/Makefile : 1.5 202 file lib/libasn1/Makefile : 1.26 203 file lib/libcrypt/Makefile : 1.17 204 file lib/libgssapi/Makefile : 1.16 205 file lib/libhdb/Makefile : 1.20 206 file lib/libkadm5clnt/Makefile : 1.21 207 file lib/libkadm5srv/Makefile : 1.25 208 file lib/libkrb5/Makefile : 1.35 209 file lib/libssh/Makefile : 1.6 210 file lib/libtelnet/Makefile : 1.26 211 file libexec/getty/Makefile : 1.14 212 file libexec/kadmind/Makefile : 1.19 213 file libexec/kpasswdd/Makefile : 1.14 214 file sbin/atactl/Makefile : 1.3 215 file sbin/cgdconfig/Makefile : 1.7 216 file sbin/clri/Makefile : 1.13 217 file sbin/dkctl/Makefile : 1.4 218 file sbin/dump/Makefile : 1.33 219 file sbin/fdisk/Makefile : 1.35 220 file sbin/fsck_ext2fs/Makefile : 1.11 221 file sbin/fsck_ffs/Makefile : 1.29 222 file sbin/fsdb/Makefile : 1.18 223 file sbin/mount_smbfs/Makefile : 1.4 224 file sbin/newfs/Makefile : 1.30 225 file sbin/newfs_sysvbfs/Makefile : 1.2 226 file sbin/restore/Makefile : 1.23 227 file sbin/veriexecctl/Makefile : 1.11 228 file sys/lib/libsa/Makefile : 1.59 229 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 230 file usr.bin/awk/Makefile : 1.9 231 file usr.bin/crontab/Makefile : 1.24 232 file usr.bin/ctags/Makefile : 1.8 233 file usr.bin/gzip/Makefile : 1.10 234 file usr.bin/ssh/sftp/Makefile : 1.10 235 file usr.bin/ssh/ssh/Makefile : 1.25 236 file usr.bin/vi/build/Makefile : 1.26 237 file usr.bin/telnet/Makefile : 1.40 238 file usr.bin/tn3270/tn3270/Makefile : 1.36 239 file usr.bin/tr/Makefile : 1.4 240 file usr.sbin/amd/amd/Makefile : 1.27 241 file usr.sbin/amd/amq/Makefile : 1.14 242 file usr.sbin/amd/libamu/Makefile : 1.20 243 file usr.sbin/amd/pawd/Makefile : 1.5 244 file usr.sbin/bind/Makefile.inc : 1.22 245 file usr.sbin/bind/libdns/Makefile : 1.3 246 file usr.sbin/bind/named/Makefile : 1.17 247 file usr.sbin/bootp/bootptest/Makefile : 1.2 248 file usr.sbin/chrtbl/Makefile : 1.6 249 file usr.sbin/cron/Makefile : 1.12 250 file usr.sbin/dhcp/Makefile.inc : 1.20 251 file usr.sbin/dumplfs/Makefile : 1.11 252 file usr.sbin/hprop/Makefile : 1.13 253 file usr.sbin/installboot/Makefile : 1.35 254 file usr.sbin/ipf/ipftest/Makefile : 1.32 255 file usr.sbin/isdn/isdnd/Makefile : 1.6 256 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 257 file usr.sbin/isdn/isdntel/Makefile : 1.2 258 file usr.sbin/isdn/isdntrace/Makefile : 126 259 file usr.sbin/mopd/common/Makefile : 1.10 260 file usr.sbin/mopd/mopd/Makefile : 1.9 261 file usr.sbin/mopd/mopprobe/Makefile : 1.7 262 file usr.sbin/makefs/Makefile : 1.17 263 file usr.sbin/mscdlabel/Makefile : 1.5 264 file usr.sbin/pkg_install/add/Makefile : 1.7 265 file usr.sbin/pkg_install/create/Makefile : 1.5 266 file usr.sbin/pkg_install/lib/Makefile : 1.28 267 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 268 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 269 file usr.sbin/pppd/Makefile.inc : 1.3 270 file usr.sbin/pppd/pppd/Makefile : 1.38 271 file usr.sbin/rarpd/Makefile : 1.10 272 file usr.sbin/rbootd/Makefile : 1.10 273 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 274 file usr.sbin/rtadvd/Makefile : 1.9 275 file usr.sbin/tcpdump/Makefile : 1.42 276 file usr.sbin/wiconfig/Makefile : 1.3 277 descr 278 GCC 4.1 warns on pointer sign comparision/assignments and lots of 279 code does not conform. For now we use -Wno-pointer-sign and 280 -fno-strict-aliasing. 281 kcah 282 283 hack disable ctf for gcc-4.8 build 284 mdate April 3 2014 285 who christos 286 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 287 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 288 descr 289 nbctfconvert -g -L VERSION -g fold-const.o 290 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 291 ((null)) <13532> 292 kcak 293 294 hack emacs aborting on exit (libgcc issue) 295 mdate 7 November 2011 296 who christos 297 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 298 descr 299 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 300 to do just that. If the symbol requested is not found, then it aborts. 301 emacs 23.3 triggers this assertion. For now disable aborting, and 302 silently ignore. 303 kcah 304 305 hack cross-building hack on Darwin 306 mdate 20 July 2008 307 who agc 308 file src/distrib/common/Makefile.mdset : 1.33 309 descr 310 Darwin has problems with getopt() when used in mdsetimage -v, 311 due to the difference between BSD and libiberty() getopt 312 implementations, more fully described in 313 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 314 and the subsequent thread. For just now, we just have an ugly 315 workaround not to call mdsetimage with the -v argument on Darwin 316 kcah 317 318 hack avoid rebuilding asn1 libraries 319 mdate 03 August 2008 320 who veego 321 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 322 file src/lib/libasn1/Makefile : 1.32 323 file src/lib/libhdb/Makefile : 1.23 324 file src/lib/libgssapi/Makefile : 1.20 325 file src/lib/libhx509/Makefile : 1.3 326 pr 9702 39185 327 descr 328 asn1_compile does not check if generated header files do not have to 329 be rebuild. 330 Generate .hx files and copy it in the Makefiles if they changed. 331 kcah 332 333 hack avoid gcc4 -O1 bug in loop optimize 334 cdate 29 November 2008 335 who tsutsui 336 file src/sbin/ifconfig/Makefile : 1.39 337 pr 40036 40066 338 descr 339 gcc -O1 seems to generate wrong code in loop optimize so that 340 ifconfig lo0 inet6 doesn't return error even if a kernel 341 doesn't have IPv6 support. (see the above PRs for details) 342 For workaround, specify -fno-loop-optimize on m68000, 343 which uses -O1 by default. 344 kcah 345 346 hack MKPIE ldscript for /usr.sbin/crash 347 cdate 22 April 2010 348 who christos 349 file src/usr.sbin/crash/Makefile : 1.5 350 file src/usr.sbin/crash/ldscript.crash : 1.1 351 pr N/A 352 descr 353 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 354 sections 355 kcah 356 357 hack Disable fortification for /usr/bin/makeinfo 358 cdata 24 Mar 2014 359 who tron 360 file src/gnu/usr.bin/texinfo/makeinfo/Makefile : 1.8 361 pr N/A 362 descr 363 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 364 it fails to process certain texinfo files, e.g. "cl.texi" 365 included in the Emacs 24.3 distribution. 366 kcah 367 368 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 369 cdata 05 Apr 2014 370 who tron 371 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 372 pr N/A 373 descr 374 If "xauth" is compile with "USE_SSP" set to "yes" it fails 375 mysteriously with an error message like this: 376 377 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 378 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 379 380 The compiler seems to get confused about the two filename variables 381 used in the link(2) system call. 382 kcah 383 384 hack g++ 5.x barfs on volatile in constexpr initializers 385 cdata 27 Aug 2015 386 who pooka 387 file src/lib/libpthread/pthread_types.h : 1.17 388 pr lib/49989 389 descr 390 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 391 in C++ results in: 392 error: temporary of non-literal type '__pthread_mutex_st' 393 in a constant expression 394 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 395 [...] 396 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 397 not literal because: 398 struct __pthread_mutex_st { 399 ^ 400 include/pthread_types.h:103:17: note: non-static data 401 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 402 pthread_spin_t ptm_errorcheck; 403 kcah 404 405 port vax 406 407 hack gcc4/vax ICE 408 cdate 409 who tsutsui 410 file sys/arch/vax/conf/Makefile.vax 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 gcc 2.95/vax doesn't like abort being used as function pointer 426 cdate Tue Dec 13 05:54:50 GMT 2005 427 who jmc 428 file lib/libc/rpc/svc_vc.c 1.15 429 descr 430 Provide a local definition for abort which doesn't include 431 the noreturn attribute which trips up gcc 2.95 on vax. 432 kcah 433 434 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 435 cdate Mon May 9 12:16:22 CDT 2005 436 who jmc 437 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 438 gnu/usr.bin/gettext/libgrep/Makefile 1.3 439 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 440 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 441 descr 442 The latest gettext assumes a C99 environment or at least 443 configure checks to work around this. As we don't use configure 444 provide a stdbool.h for vax builds locally in directories from 445 the template provided by the gettext code. 446 kcah 447 448 hack gcc 2.95/vax cannot handle __builtin_ffs() 449 cdate Fri Aug 23 21:31:15 CEST 2002 450 who ragge 451 file sys/lib/libkern/libkern.h : 1.42 452 descr 453 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 454 added this feature to GCC 3 so it can be removed when switching. 455 kcah 456 457 hack gcc 2.95/vax libbz2 458 mdate 27 Jun 2002 459 who thorpej 460 file lib/libbz2/Makefile 461 descr 462 libbz2 is mis-compiled with optimization with GCC 2.95.3 463 on VAX. -O0 works around this problem. 464 kcah 465 466 hack vax Toolchain bug 467 cdate 28 Mar 2003 468 who he 469 file sys/arch/vax/vax/intvec.S : 1.5 470 descr 471 Workaround for PR toolchain/20924. The assembler apparently 472 tries to range-check byte offsets when it doesn't have 473 sufficient information to make that decision. 474 Workaround uses `brw' instead of `brb' instruction. 475 kcah 476 477 hack vax gcc 2.95.3 -Wuninitialized workarounds 478 cdate 6 Nov 2003 479 who he 480 file sys/dev/bi/if_ni.c : 1.22 481 file sys/arch/vax/vax/ctu.c : 1.20 482 descr 483 Workaround for gcc 2.95.3 failing to detect that certain 484 variables will be initialized; so that this code compiles 485 with -Wuninitialized. Should be reviewed and possibly 486 reverted when gcc 3.3.2 is ready for vax. 487 kcah 488 489 hack vax gcc 2.95.3 structure initialization 490 cdat 13 May 2004 491 who cl 492 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 493 descr 494 Workaround for gcc 2.95.3 failing to initialize structures 495 and/or unions inside structures using nested designators. 496 Should be reverted when gcc >=3.3.3 is ready for vax. 497 kcah 498 499 hack vax gcc 2.95.3 needs -I. to build nslexer.c 500 cdat 6 Jun 2004 501 who mhitch 502 file lib/libc/arch/vax/Makefile.inc : 1.6 503 descr 504 It appears necessary to add -I. to CPPFLAGS when building 505 nslesxer.c. This may be caused by gcc 2.95.3 being used. 506 Should be reverted when a newer gcc is ready for vax. 507 kcah 508 509 hack vax gcc 2.95.3 doesn't understand "-std=c99" 510 cdat 5 April 2005 511 who tron 512 file src/share/mk/bsd.sys.mk 513 descr 514 We cannot use "-std=c99" for compiler warning level 4 and above 515 because gcc 2.95.3 doesn't support that option. 516 kcah 517 518 hack declare boolean_t in two IPF user-mode programs 519 cdate Tue Mar 7 19:19:20 CET 2006 520 who he 521 file dist/ipf/ipsend/iptests.c : 1.8 522 dist/ipf/ipsend/sock.c : 1.7 523 descr 524 The IPF user-mode programs ipsend and iptest first 525 include <sys/types.h> without _KERNEL defined, and 526 later include <sys/file.h> with _KERNEL defined. 527 This causes a build failure when building for vax, 528 since <sys/device.h> ends up being included without 529 bollean_t being defined by <sys/types.h>. 530 Build failure and further details documented in 531 PR#32907. 532 kcah 533 534 hack pcc 0.9.9 large string literals 535 cdat 8 July 2008 536 who gmcgarry 537 file sys/conf/param.c : 1.58 538 descr 539 Workaround for pcc 0.9.9 not handling large string literals 540 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 541 fail compilation. 542 There is a proposal on the pcc mailing list to stuff config 543 file in ELF section. 544 kcah 545 546 hack xorg warnings 547 cdat 30 July 2008, 3 June, 2013 548 who mrg 549 file external/mit/xorg/lib/libSM/Makefile : 1.2 550 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 551 external/mit/xorg/lib/libXext/Makefile : 1.2 552 external/mit/xorg/lib/libXfont/Makefile : 1.2 553 descr 554 Disable several warnings or use -Wno-error across Xorg sources 555 while we get them working 556 kcah 557 558 hack 32 bit time leftovers 559 cdat 11 January 2009 560 who christos 561 file lib/libc/time/localtime.c : 1.41 562 lib/libc/time/zic.c : 1.23 563 descr 564 The timezone compiled files still contain 32 bit time_t 565 quantities. I did not want to version the files because 566 the ``parser'' is too ugly for words. What needs to be 567 done, is to rewrite the parser from scratch also to avoid 568 potential core-dumps from parsing invalid files. 569 kcah 570 571 hack 32 bit time leftovers 572 cdat 11 January 2009 573 who christos 574 file various 575 descr 576 Many filesystem on-disk formats have 32 bit times. 577 kcah 578 579 hack gcc 4.5 fsdb miscompile 580 date Sat Nov 9 11:03:02 EST 2013 581 who christos 582 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 583 descr 584 src/sbin/fsdb/fsdb.c: In function 'findblk': 585 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 586 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 587 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 588 (const_int 8 [0x8])) 589 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 590 -1 (nil)) 591 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 592 extract_insn, at recog.c:2103 593 kcah 594 595 hack gcc 4.8 gcc miscompiles 596 date Sat Nov 9 16:35:18 EST 2013 597 who christos 598 file distrib/utils/x_ping/Makefile 599 file distrib/vax/miniroot/Makefile.inc 600 file distrib/vax/ramdisk/Makefile 601 file external/gpl3/gdb/lib/libdecnumber/Makefile 602 file sbin/fsdb/Makefile 603 file sbin/newfs_ext2fs/Makefile 604 file sbin/ping/Makefile 605 file usr.sbin/lmcconfig/Makefile 606 file usr.sbin/mtrace/Makefile 607 descr 608 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 609 internal compiler error: in change_address_1, at emit-rtl.c:2019 610 external/gpl3/gcc/dist/gcc/recog.c:770:1: 611 internal compiler error: in change_address_1, at emit-rtl.c:2019 612 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 613 internal compiler error: in change_address_1, at emit-rtl.c:2019 614 sbin/ping/ping.c:679:1: 615 internal compiler error: in change_address_1, at emit-rtl.c:2019 616 sbin/newfs_ext2fs/mke2fs.c:681:1: 617 internal compiler error: in reload_combine_note_use, 618 at postreload.c:1561 619 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 620 internal compiler error: in change_address_1, at emit-rtl.c:2019 621 usr.sbin/lmcconfig/lmcconfig.c:939:3: 622 internal compiler error: in reload_combine_note_use, 623 at postreload.c:1561 624 usr.sbin/mtrace/mtrace.c:1655:1: 625 internal compiler error: in change_address_1, at emit-rtl.c:2019 626 kcah 627 628 port arm 629 630 hack gcc-unsigned-compare 631 cdate 09 Mar 2002 632 mdate 18 Mar 2002 633 who bjh21 634 file dist/bind/lib/nameser/ns_parse.c : 1.3 635 file dist/dhcp/minires/ns_parse.c : 1.3 636 file dist/dhcp/omapip/result.c : 1.2 637 file dist/dhcp/server/failover.c : 1.3 638 file gnu/dist/toolchain/bfd/bfd.c : 1.2 639 file gnu/dist/toolchain/bfd/format.c : 1.2 640 file gnu/dist/toolchain/gdb/target.c : 1.2 641 file sys/kern/vfs_subr.c : 1.172 642 descr When checking that a potentially-unsigned enum is >= 0, assign 643 it to an int first. This is necessary to avoid "comparison is 644 always true" warnings with -fshort-enums. Casting to an int 645 really should be enough, but turns out not to be. 646 kcah 647 648 hack gcc-4.5 arm CNAME hostname lookup failure on 649 certain DNS environment (probably -ftree-ter problem) 650 cdate Sat Dec 24 04:59:00 UTC 2011 651 mdate 652 who tsutsui 653 file lib/libc/net/Makefile.inc 1.79 654 descr Hostname lookup against CNAMEs by some commands fails 655 on certain DNS environments if lib/libc/net/gethnamaddr.c 656 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 657 are compiled with -O2, even though nslookup(1) against 658 the same CNAME returns proper hostname. 659 They works properly if compiled with -O2 -fno-tree-ter. 660 Also -O2 fails but -O2 -fno-tree-ter works on the following 661 test case in gcc bugzilla: 662 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 663 kcah 664 665 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 666 cdate Wed Nov 14 13:02:02 JST 2012 667 who msaitoh 668 file lib/libc/softfloat/Makefile.inc 669 pr 46953 670 regress src/tests/lib/libm/t_cbrt 671 regress src/tests/lib/libm/t_ceil 672 regress src/tests/lib/libm/t_exp 673 regress src/tests/lib/libm/t_log 674 regress src/tests/lib/libm/t_scalbn 675 regress src/tests/lib/libm/t_sinh 676 regress src/tests/lib/libm/t_sqrt 677 descr Gcc has a bug in tree optimization. For adddf3, 678 -INF + -INF returns 0 without -fno-tree-vrp. 679 Debugging with -fdump-tree-all shows that 680 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 681 is broken. 682 kcah 683 684 port sh3 685 686 hack gcc4-sh3-bz2 687 cdate Sun May 21 03:34:57 UTC 2006 688 mdate Fri May 16 13:13:00 UTC 2008 689 who mrg, tsutsui 690 file lib/libbz2/Makefile : 1.10 691 descr 692 The in-tree GCC 4.1-based compiler generated too-far 693 pc-relative addresses. Hack is to build with 694 -fno-loop-optimize. 695 kcah 696 697 port sh3eb 698 hack gcc4.8.1 699 cdate Thu Nov 7 16:31:23 EST 2013 700 who christos 701 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 702 desrc 703 for profiling 704 compile l2cap_signal.c with -O0 to avoid: 705 ./netbt/l2cap_signal.c:36: 706 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 707 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 708 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 709 impossible reload 710 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 711 kcah 712 713 port sh3el 714 hack gcc4.8.1 715 cdate Fri Nov 8 19:27:01 EST 2013 716 who christos 717 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 718 desrc 719 for profiling 720 compile evdns.c with -O0 to avoid: 721 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 722 impossible reload 723 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 724 kcah 725 726 hack gcc4.8.1 727 cdate Fri Nov 8 19:34:48 EST 2013 728 who christos 729 file src/usr.sbin/racoon/Makefile : 1.27 730 desrc 731 for profiling 732 compile ipsec_doi.c with -O0 to avoid: 733 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 734 impossible reload 735 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 736 kcah 737 738 port m68000 739 740 hack gcc4-m68000 741 cdate Fri Feb 8 10:29:37 PST 2008 742 mdate Sun May 4 15:37:19 UTC 2008 743 who mrg, tsutsui 744 file rescue/Makefile : 1.21 745 file sbin/dump_lfs/Makefile : 1.9 746 file sbin/fsck_ffs/Makefile : 1.35 747 file sbin/fsdb/Makefile : 1.22 748 file share/mk/sys.mk : 1.96 749 file usr.sbin/ndbootd/Makefile : 1.5 750 descr 751 Several internal compiler errors with gcc -O1 752 around 64bit integer arithmetic. 753 This hack uses -O1 and adds some -fno-tree-foo options 754 to avoid the problem. 755 This might be related with GCC Bugzilla Bug 32424. 756 kcah 757 758 port m68k,sh3,vax 759 760 hack gcc-4.8.1 761 cdate Wed Nov 6 20:41:35 EST 2013 762 who christos 763 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 764 descr 765 compile hashtable_c++0x.cc with -O2 instead of -Os to 766 produce missing instantiation of std::lower_bound expansion 767 for unsigned long. 768 kcah 769 770 port sparc 771 772 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 773 cdate Sun Aug 14 19:26:48 PDT 2011 774 who mrg 775 file sys/arch/sparc64/sparc/cpu.c : 1.234 776 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 777 file sys/arch/sparc64/sparc/genassym.cf : 1.67 778 file sys/arch/sparc64/sparc/locore.s : 1.265 779 descr 780 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 781 Post newlock2 there was a bug where a lock was reduced from 782 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 783 would crash due to NULL IPI. This was fixed by re-using the 784 right IPL value. However, GCC 4.5.3 build kernels have the 785 same problems. For now, the hack is re-instated. 786 kcah 787 788 789 port mips 790 791 hack mips-shared-linker-load-address 792 cdate Fri Oct 7 08:33:10 UTC 2005 793 who simonb 794 file src/sys/kern/exec_elf32.c : 1.107 795 descr 796 With COMPAT_16 or previous enabled (which enables 797 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 798 load and run at address 0. The check to fix this in 799 rev 1.107 only checks the first psection of the ELF 800 executable, which may not be loadable. A more correct 801 fix is to check the first loadable psection instead of 802 just the first psection. 803 kcah 804 805 hack mips-duplicate-ras-end-label 806 cdate Sat Sep 2 23:29:42 2006 807 who martin 808 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 809 descr 810 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 811 labels by duplicated __asm output from RAS_END() 812 macro. 813 kcah 814 815 hack mips-mcount-assembler-warning 816 cdate Tue Jul 29 14:16:52 UTC 2008 817 who lukem 818 file src/lib/libc/gmon/Makefile.inc : 1.8 819 descr 820 Workaround for PR port-mips/39192. 821 common/lib/libc/gmon/mcount.c generates a (fatal) 822 assembler warning on MIPS: 823 Warning: No .cprestore pseudo-op used in PIC code 824 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 825 kcah 826 827 port i386 828 829 hack use volatile intermediate variable to enforce rounding 830 cdate Tue Aug 1 22:15:55 MEST 2006 831 who drochner 832 file src/lib/libm/src/lrintf.c : 1.4 833 file src/lib/libm/src/s_rintf.c : 1.8 834 descr 835 gcc-4 does subsequent operations on "float" values within 836 the i387 FPU without rounding the intermediate results 837 kcah 838 839 port x86 840 hack turn off optimization for biosdisk_ll.c because otherwise 841 we are pass the wrong arguments to biosdisk_read(). 842 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 843 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 844 who christos 845 file src/sys/arch/i386/stand/lib/Makefile : 1.38 846 descr 847 Turning on DISK_DEBUG shows the problem. We should find 848 out which option is causing this. 849 hcah 850 851 port powerpc 852 853 hack avoid using __builtin_return_address(0) because it fails in 854 Xorg's module loader 855 cdate Sat Sep 27 03:52:05 UTC 2008 856 who macallan 857 file src/libexec/ld.elf_so/rtld.c : 1.121 858 descr 859 workaround for PR port-macppc/37812 860 kcah 861 862 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 863 building the native compiler via build.sh those don't defined 864 properly. 865 cdate Sat Mar 12 08:00:00 UTC 2011 866 who matt 867 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 868 descr 869 see above 870 kcah 871 872 port powerpc64 873 874 hack include _errno.c in libposix so that __errno resolves. It 875 should resolve from libc's errno, but somehow it does not. 876 Linker bug? 877 cdate Thu Oct 27 13:19:47 EDT 2011 878 who christos 879 file src/lib/libposix/Makefile: 1.15 880 file src/lib/librt/Makefile: 1.14 881 descr 882 workaround for: 883 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 884 R_PPC64_REL24 relocation against symbol `.__errno' 885 kcah 886 887 hack rename data() function in mdocml to avoid redefined error. 888 Compiler/Assembler bug? 889 cdate Sat Oct 29 11:16:01 EDT 2011 890 who christos 891 file src/external/bsd/mdocml/tbl_data.c: 1.2 892 descr 893 workaround for: 894 {standard input}: Assembler messages: 895 {standard input}:105: Error: symbol `.data' is already \ 896 defined 897 kcah 898 899 port emips 900 901 hack Add nop between ctc1 and mtc0 to avoid assembler internal 902 error 903 cdate Sat Oct 29 16:57:34 EDT 2011 904 who christos 905 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 906 descr 907 workaround for: 908 {standard input}: Assembler messages: 909 {standard input}:730: Internal error! 910 Assertion failure in append_insn at /usr/src/external/gpl3/\ 911 binutils/dist/gas/config/tc-mips.c line 2910. 912 kcah 913 914 port ia64 915 916 hack libc hesiod.c file does not compile with -O2 (internal 917 compiler error in gcc 4.5.3) 918 cdate Thu Dec 27 08:05:43 CET 2012 919 who martin 920 file src/lib/libc/net/Makefile.inc: 1.82 921 descr 922 workaround for: 923 {standard input}: Assembler messages: 924 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 925 {standard input}:1506: Warning: This is the location of the conflicting usage 926 {standard input}: Error: 2 warnings, treating warnings as errors 927 kcah 928 929 hack libelf libelf_extended.c compiler error in gcc 4.5.3 930 cdate Thu Dec 27 09:05:51 CET 2012 931 who martin 932 file src/external/bsd/libelf/lib/Makefile: 1.3 933 descr 934 workaround for: 935 {standard input}: Assembler messages: 936 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 937 {standard input}:87: Warning: Only the first path encountering the conflict is reported 938 {standard input}:85: Warning: This is the location of the conflicting usage 939 kcah 940 941 hack compiler error with gcc 4.5.x 942 cdate Thu Dec 27 15:15:25 CET 2012 943 who martin 944 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 945 descr 946 workaround for: 947 {standard input}: Assembler messages: 948 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 949 {standard input}:22978: Warning: This is the location of the conflicting usage 950 kcah 951 952 hack libgcc unwind dummy function 953 cdate Fri Apr 17 14:31:03 CEST 2015 954 who martin 955 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 956 descr 957 Add an empty _Unwind_FindTableEntry() implementation. 958 In the end we will use our libc stuff, and this should 959 go away again. 960 kcah 961 962 port x68k 963 964 hack compiler error with gcc 4.5.x 965 cdate Fri May 24 13:23:01 EDT 2013 966 who christos 967 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 968 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 969 descr 970 workaround for: 971 internal compiler error: in cselib_record_set, at cselib.c:1999 972 kcah 973 974 hack fallback to /usr/bin/clang-cpp in rpcgen 975 cdate Wed Jun 5 15:49:27 CEST 2013 976 who joerg 977 file src/usr.bin/rpcgen/rpc_main.c 978 descr 979 It is undecided which compiler owns /usr/bin/cpp and whether it should 980 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 981 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 982 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 983 kcah 984 985 port hppa 986 987 hack compiler error with gcc 4.5.x 988 cdate Tue Jul 23 07:42:28 BST 2013 989 who skrll 990 file src/sys/lib/libkern/Makefile.libkern: 1.26 991 descr 992 workaround for unanalysed codegen bug affecting md5c.c. 993 kcah 994 995 hack gdb vs _rtld_debug_state problem 996 cdate Thu Mar 5 09:49:53 UTC 2015 997 who skrll 998 file src/libexec/ld.elf_so/rtld.c: 1.175 999 descr 1000 workaround for problem where gdb misses the breakpoint on 1001 _rtld_debug_state when the function is only the 1002 bv,n %r0(%rp) instruction - the nullify seems to 1003 confuse something 1004 kcah 1005 1006 port mips64* 1007 hack compiler crashes on mips64* with optimization enabled 1008 cdate Tue May 13 18:46:48 UTC 2014 1009 who macallan 1010 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 1011 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 1012 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 1013 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 1014 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 1015 pr 48696 1016 kcah 1017 1018 port vax 1019 hack compile boot with -O1 1020 cdate Sat May 24 09:40:58 CEST 2014 1021 who martin 1022 file src/sys/arch/vax/boot/boot/Makefile: 1.41 1023 descr /boot does not work when compiled with -O2 and gcc 4.8 1024 kcah 1025 1026 port arm 1027 hack avoid using labels in a 12-bit constant. 1028 who matt 1029 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 1030 descr workaround for clang misassembling an instruction 1031 kcah 1032
Indexes created Wed Nov 05 19:10:08 GMT 2025