HACKS revision 1.160
1 # $NetBSD: HACKS,v 1.160 2015/06/26 10:25:41 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++ 5.1 barfs on volatile in initializers 385 cdata 26 Jun 2015 386 who pooka 387 file src/lib/libpthread/pthread_types.h : 1.14 388 file src/lib/libpthread/pthread_types.h : 1.15 389 pr lib/49989 390 descr 391 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 392 in C++ results in: 393 error: temporary of non-literal type '__pthread_mutex_st' 394 in a constant expression 395 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 396 [...] 397 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 398 not literal because: 399 struct __pthread_mutex_st { 400 ^ 401 include/pthread_types.h:103:17: note: non-static data 402 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 403 pthread_spin_t ptm_errorcheck; 404 kcah 405 406 port vax 407 408 hack gcc4/vax ICE 409 cdate 410 who tsutsui 411 file sys/arch/vax/conf/Makefile.vax 412 descr 413 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 414 -fno-tree-ter prevents it so add it to COPTS. 415 kcah 416 417 hack gcc4/vax compiler crash 418 cdate Fri Jun 30 22:39:12 PDT 2006 419 who mrg 420 file bin/csh/Makefile : 1.27 421 file lib/i18n_module/UTF7/Makefile : 1.2 422 descr 423 GCC4 on vax crashes. -O0 stops it happening so far... 424 kcah 425 426 hack gcc 2.95/vax doesn't like abort being used as function pointer 427 cdate Tue Dec 13 05:54:50 GMT 2005 428 who jmc 429 file lib/libc/rpc/svc_vc.c 1.15 430 descr 431 Provide a local definition for abort which doesn't include 432 the noreturn attribute which trips up gcc 2.95 on vax. 433 kcah 434 435 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 436 cdate Mon May 9 12:16:22 CDT 2005 437 who jmc 438 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 439 gnu/usr.bin/gettext/libgrep/Makefile 1.3 440 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 441 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 442 descr 443 The latest gettext assumes a C99 environment or at least 444 configure checks to work around this. As we don't use configure 445 provide a stdbool.h for vax builds locally in directories from 446 the template provided by the gettext code. 447 kcah 448 449 hack gcc 2.95/vax cannot handle __builtin_ffs() 450 cdate Fri Aug 23 21:31:15 CEST 2002 451 who ragge 452 file sys/lib/libkern/libkern.h : 1.42 453 descr 454 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 455 added this feature to GCC 3 so it can be removed when switching. 456 kcah 457 458 hack gcc 2.95/vax libbz2 459 mdate 27 Jun 2002 460 who thorpej 461 file lib/libbz2/Makefile 462 descr 463 libbz2 is mis-compiled with optimization with GCC 2.95.3 464 on VAX. -O0 works around this problem. 465 kcah 466 467 hack vax Toolchain bug 468 cdate 28 Mar 2003 469 who he 470 file sys/arch/vax/vax/intvec.S : 1.5 471 descr 472 Workaround for PR toolchain/20924. The assembler apparently 473 tries to range-check byte offsets when it doesn't have 474 sufficient information to make that decision. 475 Workaround uses `brw' instead of `brb' instruction. 476 kcah 477 478 hack vax gcc 2.95.3 -Wuninitialized workarounds 479 cdate 6 Nov 2003 480 who he 481 file sys/dev/bi/if_ni.c : 1.22 482 file sys/arch/vax/vax/ctu.c : 1.20 483 descr 484 Workaround for gcc 2.95.3 failing to detect that certain 485 variables will be initialized; so that this code compiles 486 with -Wuninitialized. Should be reviewed and possibly 487 reverted when gcc 3.3.2 is ready for vax. 488 kcah 489 490 hack vax gcc 2.95.3 structure initialization 491 cdat 13 May 2004 492 who cl 493 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 494 descr 495 Workaround for gcc 2.95.3 failing to initialize structures 496 and/or unions inside structures using nested designators. 497 Should be reverted when gcc >=3.3.3 is ready for vax. 498 kcah 499 500 hack vax gcc 2.95.3 needs -I. to build nslexer.c 501 cdat 6 Jun 2004 502 who mhitch 503 file lib/libc/arch/vax/Makefile.inc : 1.6 504 descr 505 It appears necessary to add -I. to CPPFLAGS when building 506 nslesxer.c. This may be caused by gcc 2.95.3 being used. 507 Should be reverted when a newer gcc is ready for vax. 508 kcah 509 510 hack vax gcc 2.95.3 doesn't understand "-std=c99" 511 cdat 5 April 2005 512 who tron 513 file src/share/mk/bsd.sys.mk 514 descr 515 We cannot use "-std=c99" for compiler warning level 4 and above 516 because gcc 2.95.3 doesn't support that option. 517 kcah 518 519 hack declare boolean_t in two IPF user-mode programs 520 cdate Tue Mar 7 19:19:20 CET 2006 521 who he 522 file dist/ipf/ipsend/iptests.c : 1.8 523 dist/ipf/ipsend/sock.c : 1.7 524 descr 525 The IPF user-mode programs ipsend and iptest first 526 include <sys/types.h> without _KERNEL defined, and 527 later include <sys/file.h> with _KERNEL defined. 528 This causes a build failure when building for vax, 529 since <sys/device.h> ends up being included without 530 bollean_t being defined by <sys/types.h>. 531 Build failure and further details documented in 532 PR#32907. 533 kcah 534 535 hack pcc 0.9.9 large string literals 536 cdat 8 July 2008 537 who gmcgarry 538 file sys/conf/param.c : 1.58 539 descr 540 Workaround for pcc 0.9.9 not handling large string literals 541 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 542 fail compilation. 543 There is a proposal on the pcc mailing list to stuff config 544 file in ELF section. 545 kcah 546 547 hack xorg warnings 548 cdat 30 July 2008, 3 June, 2013 549 who mrg 550 file external/mit/xorg/lib/libSM/Makefile : 1.2 551 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 552 external/mit/xorg/lib/libXext/Makefile : 1.2 553 external/mit/xorg/lib/libXfont/Makefile : 1.2 554 descr 555 Disable several warnings or use -Wno-error across Xorg sources 556 while we get them working 557 kcah 558 559 hack 32 bit time leftovers 560 cdat 11 January 2009 561 who christos 562 file lib/libc/time/localtime.c : 1.41 563 lib/libc/time/zic.c : 1.23 564 descr 565 The timezone compiled files still contain 32 bit time_t 566 quantities. I did not want to version the files because 567 the ``parser'' is too ugly for words. What needs to be 568 done, is to rewrite the parser from scratch also to avoid 569 potential core-dumps from parsing invalid files. 570 kcah 571 572 hack 32 bit time leftovers 573 cdat 11 January 2009 574 who christos 575 file various 576 descr 577 Many filesystem on-disk formats have 32 bit times. 578 kcah 579 580 hack gcc 4.5 fsdb miscompile 581 date Sat Nov 9 11:03:02 EST 2013 582 who christos 583 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 584 descr 585 src/sbin/fsdb/fsdb.c: In function 'findblk': 586 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 587 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 588 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 589 (const_int 8 [0x8])) 590 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 591 -1 (nil)) 592 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 593 extract_insn, at recog.c:2103 594 kcah 595 596 hack gcc 4.8 gcc miscompiles 597 date Sat Nov 9 16:35:18 EST 2013 598 who christos 599 file distrib/utils/x_ping/Makefile 600 file distrib/vax/miniroot/Makefile.inc 601 file distrib/vax/ramdisk/Makefile 602 file external/gpl3/gdb/lib/libdecnumber/Makefile 603 file sbin/fsdb/Makefile 604 file sbin/newfs_ext2fs/Makefile 605 file sbin/ping/Makefile 606 file usr.sbin/lmcconfig/Makefile 607 file usr.sbin/mtrace/Makefile 608 descr 609 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 610 internal compiler error: in change_address_1, at emit-rtl.c:2019 611 external/gpl3/gcc/dist/gcc/recog.c:770:1: 612 internal compiler error: in change_address_1, at emit-rtl.c:2019 613 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 614 internal compiler error: in change_address_1, at emit-rtl.c:2019 615 sbin/ping/ping.c:679:1: 616 internal compiler error: in change_address_1, at emit-rtl.c:2019 617 sbin/newfs_ext2fs/mke2fs.c:681:1: 618 internal compiler error: in reload_combine_note_use, 619 at postreload.c:1561 620 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 621 internal compiler error: in change_address_1, at emit-rtl.c:2019 622 usr.sbin/lmcconfig/lmcconfig.c:939:3: 623 internal compiler error: in reload_combine_note_use, 624 at postreload.c:1561 625 usr.sbin/mtrace/mtrace.c:1655:1: 626 internal compiler error: in change_address_1, at emit-rtl.c:2019 627 kcah 628 629 port arm 630 631 hack gcc-unsigned-compare 632 cdate 09 Mar 2002 633 mdate 18 Mar 2002 634 who bjh21 635 file dist/bind/lib/nameser/ns_parse.c : 1.3 636 file dist/dhcp/minires/ns_parse.c : 1.3 637 file dist/dhcp/omapip/result.c : 1.2 638 file dist/dhcp/server/failover.c : 1.3 639 file gnu/dist/toolchain/bfd/bfd.c : 1.2 640 file gnu/dist/toolchain/bfd/format.c : 1.2 641 file gnu/dist/toolchain/gdb/target.c : 1.2 642 file sys/kern/vfs_subr.c : 1.172 643 descr When checking that a potentially-unsigned enum is >= 0, assign 644 it to an int first. This is necessary to avoid "comparison is 645 always true" warnings with -fshort-enums. Casting to an int 646 really should be enough, but turns out not to be. 647 kcah 648 649 hack gcc-4.5 arm CNAME hostname lookup failure on 650 certain DNS environment (probably -ftree-ter problem) 651 cdate Sat Dec 24 04:59:00 UTC 2011 652 mdate 653 who tsutsui 654 file lib/libc/net/Makefile.inc 1.79 655 descr Hostname lookup against CNAMEs by some commands fails 656 on certain DNS environments if lib/libc/net/gethnamaddr.c 657 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 658 are compiled with -O2, even though nslookup(1) against 659 the same CNAME returns proper hostname. 660 They works properly if compiled with -O2 -fno-tree-ter. 661 Also -O2 fails but -O2 -fno-tree-ter works on the following 662 test case in gcc bugzilla: 663 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 664 kcah 665 666 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 667 cdate Wed Nov 14 13:02:02 JST 2012 668 who msaitoh 669 file lib/libc/softfloat/Makefile.inc 670 pr 46953 671 regress src/tests/lib/libm/t_cbrt 672 regress src/tests/lib/libm/t_ceil 673 regress src/tests/lib/libm/t_exp 674 regress src/tests/lib/libm/t_log 675 regress src/tests/lib/libm/t_scalbn 676 regress src/tests/lib/libm/t_sinh 677 regress src/tests/lib/libm/t_sqrt 678 descr Gcc has a bug in tree optimization. For adddf3, 679 -INF + -INF returns 0 without -fno-tree-vrp. 680 Debugging with -fdump-tree-all shows that 681 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 682 is broken. 683 kcah 684 685 port sh3 686 687 hack gcc4-sh3-bz2 688 cdate Sun May 21 03:34:57 UTC 2006 689 mdate Fri May 16 13:13:00 UTC 2008 690 who mrg, tsutsui 691 file lib/libbz2/Makefile : 1.10 692 descr 693 The in-tree GCC 4.1-based compiler generated too-far 694 pc-relative addresses. Hack is to build with 695 -fno-loop-optimize. 696 kcah 697 698 port sh3eb 699 hack gcc4.8.1 700 cdate Thu Nov 7 16:31:23 EST 2013 701 who christos 702 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 703 desrc 704 for profiling 705 compile l2cap_signal.c with -O0 to avoid: 706 ./netbt/l2cap_signal.c:36: 707 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 708 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 709 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 710 impossible reload 711 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 712 kcah 713 714 port sh3el 715 hack gcc4.8.1 716 cdate Fri Nov 8 19:27:01 EST 2013 717 who christos 718 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 719 desrc 720 for profiling 721 compile evdns.c with -O0 to avoid: 722 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 723 impossible reload 724 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 725 kcah 726 727 hack gcc4.8.1 728 cdate Fri Nov 8 19:34:48 EST 2013 729 who christos 730 file src/usr.sbin/racoon/Makefile : 1.27 731 desrc 732 for profiling 733 compile ipsec_doi.c with -O0 to avoid: 734 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 735 impossible reload 736 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 737 kcah 738 739 port m68000 740 741 hack gcc4-m68000 742 cdate Fri Feb 8 10:29:37 PST 2008 743 mdate Sun May 4 15:37:19 UTC 2008 744 who mrg, tsutsui 745 file rescue/Makefile : 1.21 746 file sbin/dump_lfs/Makefile : 1.9 747 file sbin/fsck_ffs/Makefile : 1.35 748 file sbin/fsdb/Makefile : 1.22 749 file share/mk/sys.mk : 1.96 750 file usr.sbin/ndbootd/Makefile : 1.5 751 descr 752 Several internal compiler errors with gcc -O1 753 around 64bit integer arithmetic. 754 This hack uses -O1 and adds some -fno-tree-foo options 755 to avoid the problem. 756 This might be related with GCC Bugzilla Bug 32424. 757 kcah 758 759 port m68k,sh3,vax 760 761 hack gcc-4.8.1 762 cdate Wed Nov 6 20:41:35 EST 2013 763 who christos 764 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 765 descr 766 compile hashtable_c++0x.cc with -O2 instead of -Os to 767 produce missing instantiation of std::lower_bound expansion 768 for unsigned long. 769 kcah 770 771 port sparc 772 773 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 774 cdate Sun Aug 14 19:26:48 PDT 2011 775 who mrg 776 file sys/arch/sparc64/sparc/cpu.c : 1.234 777 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 778 file sys/arch/sparc64/sparc/genassym.cf : 1.67 779 file sys/arch/sparc64/sparc/locore.s : 1.265 780 descr 781 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 782 Post newlock2 there was a bug where a lock was reduced from 783 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 784 would crash due to NULL IPI. This was fixed by re-using the 785 right IPL value. However, GCC 4.5.3 build kernels have the 786 same problems. For now, the hack is re-instated. 787 kcah 788 789 790 port mips 791 792 hack mips-shared-linker-load-address 793 cdate Fri Oct 7 08:33:10 UTC 2005 794 who simonb 795 file src/sys/kern/exec_elf32.c : 1.107 796 descr 797 With COMPAT_16 or previous enabled (which enables 798 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 799 load and run at address 0. The check to fix this in 800 rev 1.107 only checks the first psection of the ELF 801 executable, which may not be loadable. A more correct 802 fix is to check the first loadable psection instead of 803 just the first psection. 804 kcah 805 806 hack mips-duplicate-ras-end-label 807 cdate Sat Sep 2 23:29:42 2006 808 who martin 809 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 810 descr 811 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 812 labels by duplicated __asm output from RAS_END() 813 macro. 814 kcah 815 816 hack mips-mcount-assembler-warning 817 cdate Tue Jul 29 14:16:52 UTC 2008 818 who lukem 819 file src/lib/libc/gmon/Makefile.inc : 1.8 820 descr 821 Workaround for PR port-mips/39192. 822 common/lib/libc/gmon/mcount.c generates a (fatal) 823 assembler warning on MIPS: 824 Warning: No .cprestore pseudo-op used in PIC code 825 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 826 kcah 827 828 port i386 829 830 hack use volatile intermediate variable to enforce rounding 831 cdate Tue Aug 1 22:15:55 MEST 2006 832 who drochner 833 file src/lib/libm/src/lrintf.c : 1.4 834 file src/lib/libm/src/s_rintf.c : 1.8 835 descr 836 gcc-4 does subsequent operations on "float" values within 837 the i387 FPU without rounding the intermediate results 838 kcah 839 840 port x86 841 hack turn off optimization for biosdisk_ll.c because otherwise 842 we are pass the wrong arguments to biosdisk_read(). 843 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 844 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 845 who christos 846 file src/sys/arch/i386/stand/lib/Makefile : 1.38 847 descr 848 Turning on DISK_DEBUG shows the problem. We should find 849 out which option is causing this. 850 hcah 851 852 port powerpc 853 854 hack avoid using __builtin_return_address(0) because it fails in 855 Xorg's module loader 856 cdate Sat Sep 27 03:52:05 UTC 2008 857 who macallan 858 file src/libexec/ld.elf_so/rtld.c : 1.121 859 descr 860 workaround for PR port-macppc/37812 861 kcah 862 863 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 864 building the native compiler via build.sh those don't defined 865 properly. 866 cdate Sat Mar 12 08:00:00 UTC 2011 867 who matt 868 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 869 descr 870 see above 871 kcah 872 873 port powerpc64 874 875 hack include _errno.c in libposix so that __errno resolves. It 876 should resolve from libc's errno, but somehow it does not. 877 Linker bug? 878 cdate Thu Oct 27 13:19:47 EDT 2011 879 who christos 880 file src/lib/libposix/Makefile: 1.15 881 file src/lib/librt/Makefile: 1.14 882 descr 883 workaround for: 884 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 885 R_PPC64_REL24 relocation against symbol `.__errno' 886 kcah 887 888 hack rename data() function in mdocml to avoid redefined error. 889 Compiler/Assembler bug? 890 cdate Sat Oct 29 11:16:01 EDT 2011 891 who christos 892 file src/external/bsd/mdocml/tbl_data.c: 1.2 893 descr 894 workaround for: 895 {standard input}: Assembler messages: 896 {standard input}:105: Error: symbol `.data' is already \ 897 defined 898 kcah 899 900 port emips 901 902 hack Add nop between ctc1 and mtc0 to avoid assembler internal 903 error 904 cdate Sat Oct 29 16:57:34 EDT 2011 905 who christos 906 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 907 descr 908 workaround for: 909 {standard input}: Assembler messages: 910 {standard input}:730: Internal error! 911 Assertion failure in append_insn at /usr/src/external/gpl3/\ 912 binutils/dist/gas/config/tc-mips.c line 2910. 913 kcah 914 915 port ia64 916 917 hack libc hesiod.c file does not compile with -O2 (internal 918 compiler error in gcc 4.5.3) 919 cdate Thu Dec 27 08:05:43 CET 2012 920 who martin 921 file src/lib/libc/net/Makefile.inc: 1.82 922 descr 923 workaround for: 924 {standard input}: Assembler messages: 925 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 926 {standard input}:1506: Warning: This is the location of the conflicting usage 927 {standard input}: Error: 2 warnings, treating warnings as errors 928 kcah 929 930 hack libelf libelf_extended.c compiler error in gcc 4.5.3 931 cdate Thu Dec 27 09:05:51 CET 2012 932 who martin 933 file src/external/bsd/libelf/lib/Makefile: 1.3 934 descr 935 workaround for: 936 {standard input}: Assembler messages: 937 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 938 {standard input}:87: Warning: Only the first path encountering the conflict is reported 939 {standard input}:85: Warning: This is the location of the conflicting usage 940 kcah 941 942 hack compiler error with gcc 4.5.x 943 cdate Thu Dec 27 15:15:25 CET 2012 944 who martin 945 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 946 descr 947 workaround for: 948 {standard input}: Assembler messages: 949 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 950 {standard input}:22978: Warning: This is the location of the conflicting usage 951 kcah 952 953 hack libgcc unwind dummy function 954 cdate Fri Apr 17 14:31:03 CEST 2015 955 who martin 956 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 957 descr 958 Add an empty _Unwind_FindTableEntry() implementation. 959 In the end we will use our libc stuff, and this should 960 go away again. 961 kcah 962 963 port x68k 964 965 hack compiler error with gcc 4.5.x 966 cdate Fri May 24 13:23:01 EDT 2013 967 who christos 968 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 969 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 970 src/x11/lib/GLU/Makefile: 1.9 971 descr 972 workaround for: 973 internal compiler error: in cselib_record_set, at cselib.c:1999 974 kcah 975 976 hack fallback to /usr/bin/clang-cpp in rpcgen 977 cdate Wed Jun 5 15:49:27 CEST 2013 978 who joerg 979 file src/usr.bin/rpcgen/rpc_main.c 980 descr 981 It is undecided which compiler owns /usr/bin/cpp and whether it should 982 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 983 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 984 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 985 kcah 986 987 port hppa 988 989 hack compiler error with gcc 4.5.x 990 cdate Tue Jul 23 07:42:28 BST 2013 991 who skrll 992 file src/sys/lib/libkern/Makefile.libkern: 1.26 993 descr 994 workaround for unanalysed codegen bug affecting md5c.c. 995 kcah 996 997 hack gdb vs _rtld_debug_state problem 998 cdate Thu Mar 5 09:49:53 UTC 2015 999 who skrll 1000 file src/libexec/ld.elf_so/rtld.c: 1.175 1001 descr 1002 workaround for problem where gdb misses the breakpoint on 1003 _rtld_debug_state when the function is only the 1004 bv,n %r0(%rp) instruction - the nullify seems to 1005 confuse something 1006 kcah 1007 1008 port mips64* 1009 hack compiler crashes on mips64* with optimization enabled 1010 cdate Tue May 13 18:46:48 UTC 2014 1011 who macallan 1012 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 1013 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 1014 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 1015 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 1016 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 1017 pr 48696 1018 kcah 1019 1020 port vax 1021 hack compile boot with -O1 1022 cdate Sat May 24 09:40:58 CEST 2014 1023 who martin 1024 file src/sys/arch/vax/boot/boot/Makefile: 1.41 1025 descr /boot does not work when compiled with -O2 and gcc 4.8 1026 kcah 1027 1028 port arm 1029 hack avoid using labels in a 12-bit constant. 1030 who matt 1031 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 1032 descr workaround for clang misassembling an instruction 1033 kcah 1034
Indexes created Wed Nov 05 19:10:08 GMT 2025