HACKS revision 1.137
1 # $NetBSD: HACKS,v 1.137 2013/11/07 21:33:59 christos 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 emacs aborting on exit (libgcc issue) 284 mdate 7 November 2011 285 who christos 286 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 287 descr 288 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 289 to do just that. If the symbol requested is not found, then it aborts. 290 emacs 23.3 triggers this assertion. For now disable aborting, and 291 silently ignore. 292 kcah 293 294 hack cross-building hack on Darwin 295 mdate 20 July 2008 296 who agc 297 file src/distrib/common/Makefile.mdset : 1.33 298 descr 299 Darwin has problems with getopt() when used in mdsetimage -v, 300 due to the difference between BSD and libiberty() getopt 301 implementations, more fully described in 302 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 303 and the subsequent thread. For just now, we just have an ugly 304 workaround not to call mdsetimage with the -v argument on Darwin 305 kcah 306 307 hack avoid rebuilding asn1 libraries 308 mdate 03 August 2008 309 who veego 310 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 311 file src/lib/libasn1/Makefile : 1.32 312 file src/lib/libhdb/Makefile : 1.23 313 file src/lib/libgssapi/Makefile : 1.20 314 file src/lib/libhx509/Makefile : 1.3 315 pr 9702 39185 316 descr 317 asn1_compile does not check if generated header files do not have to 318 be rebuild. 319 Generate .hx files and copy it in the Makefiles if they changed. 320 kcah 321 322 hack avoid gcc4 -O1 bug in loop optimize 323 cdate 29 November 2008 324 who tsutsui 325 file src/sbin/ifconfig/Makefile : 1.39 326 pr 40036 40066 327 descr 328 gcc -O1 seems to generate wrong code in loop optimize so that 329 ifconfig lo0 inet6 doesn't return error even if a kernel 330 doesn't have IPv6 support. (see the above PRs for details) 331 For workaround, specify -fno-loop-optimize on m68000, 332 which uses -O1 by default. 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 port vax 347 348 hack gcc4/vax ICE 349 cdate 350 who tsutsui 351 file sys/arch/vax/conf/Makefile.vax 352 descr 353 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 354 -fno-tree-ter prevents it so add it to COPTS. 355 kcah 356 357 hack gcc4/vax compiler crash 358 cdate Fri Jun 30 22:39:12 PDT 2006 359 who mrg 360 file bin/csh/Makefile : 1.27 361 file lib/i18n_module/UTF7/Makefile : 1.2 362 descr 363 GCC4 on vax crashes. -O0 stops it happening so far... 364 kcah 365 366 hack gcc 2.95/vax doesn't like abort being used as function pointer 367 cdate Tue Dec 13 05:54:50 GMT 2005 368 who jmc 369 file lib/libc/rpc/svc_vc.c 1.15 370 descr 371 Provide a local definition for abort which doesn't include 372 the noreturn attribute which trips up gcc 2.95 on vax. 373 kcah 374 375 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 376 cdate Mon May 9 12:16:22 CDT 2005 377 who jmc 378 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 379 gnu/usr.bin/gettext/libgrep/Makefile 1.3 380 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 381 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 382 descr 383 The latest gettext assumes a C99 environment or at least 384 configure checks to work around this. As we don't use configure 385 provide a stdbool.h for vax builds locally in directories from 386 the template provided by the gettext code. 387 kcah 388 389 hack gcc 2.95/vax cannot handle __builtin_ffs() 390 cdate Fri Aug 23 21:31:15 CEST 2002 391 who ragge 392 file sys/lib/libkern/libkern.h : 1.42 393 descr 394 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 395 added this feature to GCC 3 so it can be removed when switching. 396 kcah 397 398 hack gcc 2.95/vax libbz2 399 mdate 27 Jun 2002 400 who thorpej 401 file lib/libbz2/Makefile 402 descr 403 libbz2 is mis-compiled with optimization with GCC 2.95.3 404 on VAX. -O0 works around this problem. 405 kcah 406 407 hack vax Toolchain bug 408 cdate 28 Mar 2003 409 who he 410 file sys/arch/vax/vax/intvec.S : 1.5 411 descr 412 Workaround for PR toolchain/20924. The assembler apparently 413 tries to range-check byte offsets when it doesn't have 414 sufficient information to make that decision. 415 Workaround uses `brw' instead of `brb' instruction. 416 kcah 417 418 hack vax gcc 2.95.3 -Wuninitialized workarounds 419 cdate 6 Nov 2003 420 who he 421 file sys/dev/bi/if_ni.c : 1.22 422 file sys/arch/vax/vax/ctu.c : 1.20 423 descr 424 Workaround for gcc 2.95.3 failing to detect that certain 425 variables will be initialized; so that this code compiles 426 with -Wuninitialized. Should be reviewed and possibly 427 reverted when gcc 3.3.2 is ready for vax. 428 kcah 429 430 hack vax gcc 2.95.3 structure initialization 431 cdat 13 May 2004 432 who cl 433 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 434 descr 435 Workaround for gcc 2.95.3 failing to initialize structures 436 and/or unions inside structures using nested designators. 437 Should be reverted when gcc >=3.3.3 is ready for vax. 438 kcah 439 440 hack vax gcc 2.95.3 needs -I. to build nslexer.c 441 cdat 6 Jun 2004 442 who mhitch 443 file lib/libc/arch/vax/Makefile.inc : 1.6 444 descr 445 It appears necessary to add -I. to CPPFLAGS when building 446 nslesxer.c. This may be caused by gcc 2.95.3 being used. 447 Should be reverted when a newer gcc is ready for vax. 448 kcah 449 450 hack vax gcc 2.95.3 doesn't understand "-std=c99" 451 cdat 5 April 2005 452 who tron 453 file src/share/mk/bsd.sys.mk 454 descr 455 We cannot use "-std=c99" for compiler warning level 4 and above 456 because gcc 2.95.3 doesn't support that option. 457 kcah 458 459 hack declare boolean_t in two IPF user-mode programs 460 cdate Tue Mar 7 19:19:20 CET 2006 461 who he 462 file dist/ipf/ipsend/iptests.c : 1.8 463 dist/ipf/ipsend/sock.c : 1.7 464 descr 465 The IPF user-mode programs ipsend and iptest first 466 include <sys/types.h> without _KERNEL defined, and 467 later include <sys/file.h> with _KERNEL defined. 468 This causes a build failure when building for vax, 469 since <sys/device.h> ends up being included without 470 bollean_t being defined by <sys/types.h>. 471 Build failure and further details documented in 472 PR#32907. 473 kcah 474 475 hack pcc 0.9.9 large string literals 476 cdat 8 July 2008 477 who gmcgarry 478 file sys/conf/param.c : 1.58 479 descr 480 Workaround for pcc 0.9.9 not handling large string literals 481 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 482 fail compilation. 483 There is a proposal on the pcc mailing list to stuff config 484 file in ELF section. 485 kcah 486 487 hack xorg warnings 488 cdat 30 July 2008, 3 June, 2013 489 who mrg 490 file external/mit/xorg/lib/libSM/Makefile : 1.2 491 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 492 external/mit/xorg/lib/libXext/Makefile : 1.2 493 external/mit/xorg/lib/libXfont/Makefile : 1.2 494 descr 495 Disable several warnings or use -Wno-error across Xorg sources 496 while we get them working 497 kcah 498 499 hack 32 bit time leftovers 500 cdat 11 January 2009 501 who christos 502 file lib/libc/time/localtime.c : 1.41 503 lib/libc/time/zic.c : 1.23 504 descr 505 The timezone compiled files still contain 32 bit time_t 506 quantities. I did not want to version the files because 507 the ``parser'' is too ugly for words. What needs to be 508 done, is to rewrite the parser from scratch also to avoid 509 potential core-dumps from parsing invalid files. 510 kcah 511 512 hack 32 bit time leftovers 513 cdat 11 January 2009 514 who christos 515 file various 516 descr 517 Many filesystem on-disk formats have 32 bit times. 518 kcah 519 520 port arm 521 522 hack gcc-unsigned-compare 523 cdate 09 Mar 2002 524 mdate 18 Mar 2002 525 who bjh21 526 file dist/bind/lib/nameser/ns_parse.c : 1.3 527 file dist/dhcp/minires/ns_parse.c : 1.3 528 file dist/dhcp/omapip/result.c : 1.2 529 file dist/dhcp/server/failover.c : 1.3 530 file gnu/dist/toolchain/bfd/bfd.c : 1.2 531 file gnu/dist/toolchain/bfd/format.c : 1.2 532 file gnu/dist/toolchain/gdb/target.c : 1.2 533 file sys/kern/vfs_subr.c : 1.172 534 descr When checking that a potentially-unsigned enum is >= 0, assign 535 it to an int first. This is necessary to avoid "comparison is 536 always true" warnings with -fshort-enums. Casting to an int 537 really should be enough, but turns out not to be. 538 kcah 539 540 hack gcc-4.5 arm CNAME hostname lookup failure on 541 certain DNS environment (probably -ftree-ter problem) 542 cdate Sat Dec 24 04:59:00 UTC 2011 543 mdate 544 who tsutsui 545 file lib/libc/net/Makefile.inc 1.79 546 descr Hostname lookup against CNAMEs by some commands fails 547 on certain DNS environments if lib/libc/net/gethnamaddr.c 548 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 549 are compiled with -O2, even though nslookup(1) against 550 the same CNAME returns proper hostname. 551 They works properly if compiled with -O2 -fno-tree-ter. 552 Also -O2 fails but -O2 -fno-tree-ter works on the following 553 test case in gcc bugzilla: 554 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 555 kcah 556 557 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 558 cdate Wed Nov 14 13:02:02 JST 2012 559 who msaitoh 560 file lib/libc/softfloat/Makefile.inc 561 pr 46953 562 regress src/tests/lib/libm/t_cbrt 563 regress src/tests/lib/libm/t_ceil 564 regress src/tests/lib/libm/t_exp 565 regress src/tests/lib/libm/t_log 566 regress src/tests/lib/libm/t_scalbn 567 regress src/tests/lib/libm/t_sinh 568 regress src/tests/lib/libm/t_sqrt 569 descr Gcc has a bug in tree optimization. For adddf3, 570 -INF + -INF returns 0 without -fno-tree-vrp. 571 Debugging with -fdump-tree-all shows that 572 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 573 is broken. 574 kcah 575 576 port sh3 577 578 hack gcc4-sh3-bz2 579 cdate Sun May 21 03:34:57 UTC 2006 580 mdate Fri May 16 13:13:00 UTC 2008 581 who mrg, tsutsui 582 file lib/libbz2/Makefile : 1.10 583 descr 584 The in-tree GCC 4.1-based compiler generated too-far 585 pc-relative addresses. Hack is to build with 586 -fno-loop-optimize. 587 kcah 588 589 hack gcc4.8.1 590 cdate Thu Nov 7 16:31:23 EST 2013 591 who christos 592 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 593 desrc 594 compile l2cap_signal.c with -O0 to avoid: 595 ./netbt/l2cap_signal.c:36: 596 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 597 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 598 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 599 impossible reload 600 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 601 kcah 602 603 port m68000 604 605 hack gcc4-m68000 606 cdate Fri Feb 8 10:29:37 PST 2008 607 mdate Sun May 4 15:37:19 UTC 2008 608 who mrg, tsutsui 609 file rescue/Makefile : 1.21 610 file sbin/dump_lfs/Makefile : 1.9 611 file sbin/fsck_ffs/Makefile : 1.35 612 file sbin/fsdb/Makefile : 1.22 613 file share/mk/sys.mk : 1.96 614 file usr.sbin/ndbootd/Makefile : 1.5 615 descr 616 Several internal compiler errors with gcc -O1 617 around 64bit integer arithmetic. 618 This hack uses -O1 and adds some -fno-tree-foo options 619 to avoid the problem. 620 This might be related with GCC Bugzilla Bug 32424. 621 kcah 622 623 port m68k,sh3 624 625 hack gcc-4.8.1 626 cdate Wed Nov 6 20:41:35 EST 2013 627 who christos 628 file src/external/gpl3/gcc/libstdc++/Makefile 629 descr 630 compile hashtable_c++0x.cc with -O2 instead of -Os to 631 produce missing instantiation of std::lower_bound expansion 632 for unsigned long. 633 kcah 634 635 port sparc 636 637 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 638 cdate Sun Aug 14 19:26:48 PDT 2011 639 who mrg 640 file sys/arch/sparc64/sparc/cpu.c : 1.234 641 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 642 file sys/arch/sparc64/sparc/genassym.cf : 1.67 643 file sys/arch/sparc64/sparc/locore.s : 1.265 644 descr 645 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 646 Post newlock2 there was a bug where a lock was reduced from 647 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 648 would crash due to NULL IPI. This was fixed by re-using the 649 right IPL value. However, GCC 4.5.3 build kernels have the 650 same problems. For now, the hack is re-instated. 651 kcah 652 653 654 port mips 655 656 hack mips-shared-linker-load-address 657 cdate Fri Oct 7 08:33:10 UTC 2005 658 who simonb 659 file src/sys/kern/exec_elf32.c : 1.107 660 descr 661 With COMPAT_16 or previous enabled (which enables 662 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 663 load and run at address 0. The check to fix this in 664 rev 1.107 only checks the first psection of the ELF 665 executable, which may not be loadable. A more correct 666 fix is to check the first loadable psection instead of 667 just the first psection. 668 kcah 669 670 hack mips-duplicate-ras-end-label 671 cdate Sat Sep 2 23:29:42 2006 672 who martin 673 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 674 descr 675 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 676 labels by duplicated __asm output from RAS_END() 677 macro. 678 kcah 679 680 hack mips-mcount-assembler-warning 681 cdate Tue Jul 29 14:16:52 UTC 2008 682 who lukem 683 file src/lib/libc/gmon/Makefile.inc : 1.8 684 descr 685 Workaround for PR port-mips/39192. 686 common/lib/libc/gmon/mcount.c generates a (fatal) 687 assembler warning on MIPS: 688 Warning: No .cprestore pseudo-op used in PIC code 689 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 690 kcah 691 692 port i386 693 694 hack use volatile intermediate variable to enforce rounding 695 cdate Tue Aug 1 22:15:55 MEST 2006 696 who drochner 697 file src/lib/libm/src/lrintf.c : 1.4 698 file src/lib/libm/src/s_rintf.c : 1.8 699 descr 700 gcc-4 does subsequent operations on "float" values within 701 the i387 FPU without rounding the intermediate results 702 kcah 703 704 port powerpc 705 706 hack avoid using __builtin_return_address(0) because it fails in 707 Xorg's module loader 708 cdate Sat Sep 27 03:52:05 UTC 2008 709 who macallan 710 file src/libexec/ld.elf_so/rtld.c : 1.121 711 descr 712 workaround for PR port-macppc/37812 713 kcah 714 715 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 716 building the native compiler via build.sh those don't defined 717 properly. 718 cdate Sat Mar 12 08:00:00 UTC 2011 719 who matt 720 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 721 descr 722 see above 723 kcah 724 725 port powerpc64 726 727 hack include _errno.c in libposix so that __errno resolves. It 728 should resolve from libc's errno, but somehow it does not. 729 Linker bug? 730 cdate Thu Oct 27 13:19:47 EDT 2011 731 who christos 732 file src/lib/libposix/Makefile: 1.15 733 file src/lib/librt/Makefile: 1.14 734 descr 735 workaround for: 736 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 737 R_PPC64_REL24 relocation against symbol `.__errno' 738 kcah 739 740 hack rename data() function in mdocml to avoid redefined error. 741 Compiler/Assembler bug? 742 cdate Sat Oct 29 11:16:01 EDT 2011 743 who christos 744 file src/external/bsd/mdocml/tbl_data.c: 1.2 745 descr 746 workaround for: 747 {standard input}: Assembler messages: 748 {standard input}:105: Error: symbol `.data' is already \ 749 defined 750 kcah 751 752 port emips 753 754 hack Add nop between ctc1 and mtc0 to avoid assembler internal 755 error 756 cdate Sat Oct 29 16:57:34 EDT 2011 757 who christos 758 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 759 descr 760 workaround for: 761 {standard input}: Assembler messages: 762 {standard input}:730: Internal error! 763 Assertion failure in append_insn at /usr/src/external/gpl3/\ 764 binutils/dist/gas/config/tc-mips.c line 2910. 765 kcah 766 767 port ia64 768 769 hack libc hesiod.c file does not compile with -O2 (internal 770 compiler error in gcc 4.5.3) 771 cdate Thu Dec 27 08:05:43 CET 2012 772 who martin 773 file src/lib/libc/net/Makefile.inc: 1.82 774 descr 775 workaround for: 776 {standard input}: Assembler messages: 777 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 778 {standard input}:1506: Warning: This is the location of the conflicting usage 779 {standard input}: Error: 2 warnings, treating warnings as errors 780 kcah 781 782 hack libelf libelf_extended.c compiler error in gcc 4.5.3 783 cdate Thu Dec 27 09:05:51 CET 2012 784 who martin 785 file src/external/bsd/libelf/lib/Makefile: 1.3 786 descr 787 workaround for: 788 {standard input}: Assembler messages: 789 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 790 {standard input}:87: Warning: Only the first path encountering the conflict is reported 791 {standard input}:85: Warning: This is the location of the conflicting usage 792 kcah 793 794 hack compiler error with gcc 4.5.x 795 cdate Thu Dec 27 15:15:25 CET 2012 796 who martin 797 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 798 descr 799 workaround for: 800 {standard input}: Assembler messages: 801 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 802 {standard input}:22978: Warning: This is the location of the conflicting usage 803 kcah 804 805 port x68k 806 807 hack compiler error with gcc 4.5.x 808 cdate Fri May 24 13:23:01 EDT 2013 809 who christos 810 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 811 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 812 src/x11/lib/GLU/Makefile: 1.9 813 descr 814 workaround for: 815 internal compiler error: in cselib_record_set, at cselib.c:1999 816 kcah 817 818 hack fallback to /usr/bin/clang-cpp in rpcgen 819 cdate Wed Jun 5 15:49:27 CEST 2013 820 who joerg 821 file src/usr.bin/rpcgen/rpc_main.c 822 descr 823 It is undecided which compiler owns /usr/bin/cpp and whether it should 824 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 825 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 826 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 827 kcah 828 829 port hp700 830 831 hack compiler error with gcc 4.5.x 832 cdate Tue Jul 23 07:42:28 BST 2013 833 who skrll 834 file src/sys/lib/libkern/Makefile.libkern: 1.26 835 descr 836 workaround for unanalysed codegen bug affecting md5c.c. 837 kcah 838
Indexes created Wed Nov 05 19:10:08 GMT 2025