HACKS revision 1.144
1 # $NetBSD: HACKS,v 1.144 2014/03/24 23:03:21 tron 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 hack Disable fortification for /usr/bin/makeinfo 347 cdata 24 Mar 2014 348 who tron 349 file src/gnu/usr.bin/texinfo/makeinfo/Makefile : 1.8 350 pr N/A 351 descr 352 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 353 it fails to process certain texinfo files, e.g. "cl.texi" 354 included in the Emacs 24.3 distribution. 355 kcah 356 357 port vax 358 359 hack gcc4/vax ICE 360 cdate 361 who tsutsui 362 file sys/arch/vax/conf/Makefile.vax 363 descr 364 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 365 -fno-tree-ter prevents it so add it to COPTS. 366 kcah 367 368 hack gcc4/vax compiler crash 369 cdate Fri Jun 30 22:39:12 PDT 2006 370 who mrg 371 file bin/csh/Makefile : 1.27 372 file lib/i18n_module/UTF7/Makefile : 1.2 373 descr 374 GCC4 on vax crashes. -O0 stops it happening so far... 375 kcah 376 377 hack gcc 2.95/vax doesn't like abort being used as function pointer 378 cdate Tue Dec 13 05:54:50 GMT 2005 379 who jmc 380 file lib/libc/rpc/svc_vc.c 1.15 381 descr 382 Provide a local definition for abort which doesn't include 383 the noreturn attribute which trips up gcc 2.95 on vax. 384 kcah 385 386 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 387 cdate Mon May 9 12:16:22 CDT 2005 388 who jmc 389 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 390 gnu/usr.bin/gettext/libgrep/Makefile 1.3 391 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 392 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 393 descr 394 The latest gettext assumes a C99 environment or at least 395 configure checks to work around this. As we don't use configure 396 provide a stdbool.h for vax builds locally in directories from 397 the template provided by the gettext code. 398 kcah 399 400 hack gcc 2.95/vax cannot handle __builtin_ffs() 401 cdate Fri Aug 23 21:31:15 CEST 2002 402 who ragge 403 file sys/lib/libkern/libkern.h : 1.42 404 descr 405 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 406 added this feature to GCC 3 so it can be removed when switching. 407 kcah 408 409 hack gcc 2.95/vax libbz2 410 mdate 27 Jun 2002 411 who thorpej 412 file lib/libbz2/Makefile 413 descr 414 libbz2 is mis-compiled with optimization with GCC 2.95.3 415 on VAX. -O0 works around this problem. 416 kcah 417 418 hack vax Toolchain bug 419 cdate 28 Mar 2003 420 who he 421 file sys/arch/vax/vax/intvec.S : 1.5 422 descr 423 Workaround for PR toolchain/20924. The assembler apparently 424 tries to range-check byte offsets when it doesn't have 425 sufficient information to make that decision. 426 Workaround uses `brw' instead of `brb' instruction. 427 kcah 428 429 hack vax gcc 2.95.3 -Wuninitialized workarounds 430 cdate 6 Nov 2003 431 who he 432 file sys/dev/bi/if_ni.c : 1.22 433 file sys/arch/vax/vax/ctu.c : 1.20 434 descr 435 Workaround for gcc 2.95.3 failing to detect that certain 436 variables will be initialized; so that this code compiles 437 with -Wuninitialized. Should be reviewed and possibly 438 reverted when gcc 3.3.2 is ready for vax. 439 kcah 440 441 hack vax gcc 2.95.3 structure initialization 442 cdat 13 May 2004 443 who cl 444 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 445 descr 446 Workaround for gcc 2.95.3 failing to initialize structures 447 and/or unions inside structures using nested designators. 448 Should be reverted when gcc >=3.3.3 is ready for vax. 449 kcah 450 451 hack vax gcc 2.95.3 needs -I. to build nslexer.c 452 cdat 6 Jun 2004 453 who mhitch 454 file lib/libc/arch/vax/Makefile.inc : 1.6 455 descr 456 It appears necessary to add -I. to CPPFLAGS when building 457 nslesxer.c. This may be caused by gcc 2.95.3 being used. 458 Should be reverted when a newer gcc is ready for vax. 459 kcah 460 461 hack vax gcc 2.95.3 doesn't understand "-std=c99" 462 cdat 5 April 2005 463 who tron 464 file src/share/mk/bsd.sys.mk 465 descr 466 We cannot use "-std=c99" for compiler warning level 4 and above 467 because gcc 2.95.3 doesn't support that option. 468 kcah 469 470 hack declare boolean_t in two IPF user-mode programs 471 cdate Tue Mar 7 19:19:20 CET 2006 472 who he 473 file dist/ipf/ipsend/iptests.c : 1.8 474 dist/ipf/ipsend/sock.c : 1.7 475 descr 476 The IPF user-mode programs ipsend and iptest first 477 include <sys/types.h> without _KERNEL defined, and 478 later include <sys/file.h> with _KERNEL defined. 479 This causes a build failure when building for vax, 480 since <sys/device.h> ends up being included without 481 bollean_t being defined by <sys/types.h>. 482 Build failure and further details documented in 483 PR#32907. 484 kcah 485 486 hack pcc 0.9.9 large string literals 487 cdat 8 July 2008 488 who gmcgarry 489 file sys/conf/param.c : 1.58 490 descr 491 Workaround for pcc 0.9.9 not handling large string literals 492 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 493 fail compilation. 494 There is a proposal on the pcc mailing list to stuff config 495 file in ELF section. 496 kcah 497 498 hack xorg warnings 499 cdat 30 July 2008, 3 June, 2013 500 who mrg 501 file external/mit/xorg/lib/libSM/Makefile : 1.2 502 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 503 external/mit/xorg/lib/libXext/Makefile : 1.2 504 external/mit/xorg/lib/libXfont/Makefile : 1.2 505 descr 506 Disable several warnings or use -Wno-error across Xorg sources 507 while we get them working 508 kcah 509 510 hack 32 bit time leftovers 511 cdat 11 January 2009 512 who christos 513 file lib/libc/time/localtime.c : 1.41 514 lib/libc/time/zic.c : 1.23 515 descr 516 The timezone compiled files still contain 32 bit time_t 517 quantities. I did not want to version the files because 518 the ``parser'' is too ugly for words. What needs to be 519 done, is to rewrite the parser from scratch also to avoid 520 potential core-dumps from parsing invalid files. 521 kcah 522 523 hack 32 bit time leftovers 524 cdat 11 January 2009 525 who christos 526 file various 527 descr 528 Many filesystem on-disk formats have 32 bit times. 529 kcah 530 531 hack gcc 4.5 fsdb miscompile 532 date Sat Nov 9 11:03:02 EST 2013 533 who christos 534 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 535 descr 536 src/sbin/fsdb/fsdb.c: In function 'findblk': 537 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 538 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 539 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 540 (const_int 8 [0x8])) 541 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 542 -1 (nil)) 543 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 544 extract_insn, at recog.c:2103 545 kcah 546 547 hack gcc 4.8 gcc miscompiles 548 date Sat Nov 9 16:35:18 EST 2013 549 who christos 550 file distrib/utils/x_ping/Makefile 551 file distrib/vax/miniroot/Makefile.inc 552 file distrib/vax/ramdisk/Makefile 553 file external/gpl3/gdb/lib/libdecnumber/Makefile 554 file sbin/fsdb/Makefile 555 file sbin/newfs_ext2fs/Makefile 556 file sbin/ping/Makefile 557 file usr.sbin/lmcconfig/Makefile 558 file usr.sbin/mtrace/Makefile 559 descr 560 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 561 internal compiler error: in change_address_1, at emit-rtl.c:2019 562 external/gpl3/gcc/dist/gcc/recog.c:770:1: 563 internal compiler error: in change_address_1, at emit-rtl.c:2019 564 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 565 internal compiler error: in change_address_1, at emit-rtl.c:2019 566 sbin/ping/ping.c:679:1: 567 internal compiler error: in change_address_1, at emit-rtl.c:2019 568 sbin/newfs_ext2fs/mke2fs.c:681:1: 569 internal compiler error: in reload_combine_note_use, 570 at postreload.c:1561 571 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 572 internal compiler error: in change_address_1, at emit-rtl.c:2019 573 usr.sbin/lmcconfig/lmcconfig.c:939:3: 574 internal compiler error: in reload_combine_note_use, 575 at postreload.c:1561 576 usr.sbin/mtrace/mtrace.c:1655:1: 577 internal compiler error: in change_address_1, at emit-rtl.c:2019 578 kcah 579 580 port arm 581 582 hack gcc-unsigned-compare 583 cdate 09 Mar 2002 584 mdate 18 Mar 2002 585 who bjh21 586 file dist/bind/lib/nameser/ns_parse.c : 1.3 587 file dist/dhcp/minires/ns_parse.c : 1.3 588 file dist/dhcp/omapip/result.c : 1.2 589 file dist/dhcp/server/failover.c : 1.3 590 file gnu/dist/toolchain/bfd/bfd.c : 1.2 591 file gnu/dist/toolchain/bfd/format.c : 1.2 592 file gnu/dist/toolchain/gdb/target.c : 1.2 593 file sys/kern/vfs_subr.c : 1.172 594 descr When checking that a potentially-unsigned enum is >= 0, assign 595 it to an int first. This is necessary to avoid "comparison is 596 always true" warnings with -fshort-enums. Casting to an int 597 really should be enough, but turns out not to be. 598 kcah 599 600 hack gcc-4.5 arm CNAME hostname lookup failure on 601 certain DNS environment (probably -ftree-ter problem) 602 cdate Sat Dec 24 04:59:00 UTC 2011 603 mdate 604 who tsutsui 605 file lib/libc/net/Makefile.inc 1.79 606 descr Hostname lookup against CNAMEs by some commands fails 607 on certain DNS environments if lib/libc/net/gethnamaddr.c 608 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 609 are compiled with -O2, even though nslookup(1) against 610 the same CNAME returns proper hostname. 611 They works properly if compiled with -O2 -fno-tree-ter. 612 Also -O2 fails but -O2 -fno-tree-ter works on the following 613 test case in gcc bugzilla: 614 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 615 kcah 616 617 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 618 cdate Wed Nov 14 13:02:02 JST 2012 619 who msaitoh 620 file lib/libc/softfloat/Makefile.inc 621 pr 46953 622 regress src/tests/lib/libm/t_cbrt 623 regress src/tests/lib/libm/t_ceil 624 regress src/tests/lib/libm/t_exp 625 regress src/tests/lib/libm/t_log 626 regress src/tests/lib/libm/t_scalbn 627 regress src/tests/lib/libm/t_sinh 628 regress src/tests/lib/libm/t_sqrt 629 descr Gcc has a bug in tree optimization. For adddf3, 630 -INF + -INF returns 0 without -fno-tree-vrp. 631 Debugging with -fdump-tree-all shows that 632 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 633 is broken. 634 kcah 635 636 port sh3 637 638 hack gcc4-sh3-bz2 639 cdate Sun May 21 03:34:57 UTC 2006 640 mdate Fri May 16 13:13:00 UTC 2008 641 who mrg, tsutsui 642 file lib/libbz2/Makefile : 1.10 643 descr 644 The in-tree GCC 4.1-based compiler generated too-far 645 pc-relative addresses. Hack is to build with 646 -fno-loop-optimize. 647 kcah 648 649 port sh3eb 650 hack gcc4.8.1 651 cdate Thu Nov 7 16:31:23 EST 2013 652 who christos 653 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 654 desrc 655 for profiling 656 compile l2cap_signal.c with -O0 to avoid: 657 ./netbt/l2cap_signal.c:36: 658 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 659 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 660 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 661 impossible reload 662 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 663 kcah 664 665 port sh3el 666 hack gcc4.8.1 667 cdate Fri Nov 8 19:27:01 EST 2013 668 who christos 669 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 670 desrc 671 for profiling 672 compile evdns.c with -O0 to avoid: 673 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 674 impossible reload 675 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 676 kcah 677 678 hack gcc4.8.1 679 cdate Fri Nov 8 19:34:48 EST 2013 680 who christos 681 file src/usr.sbin/racoon/Makefile : 1.27 682 desrc 683 for profiling 684 compile ipsec_doi.c with -O0 to avoid: 685 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 686 impossible reload 687 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 688 kcah 689 690 port m68000 691 692 hack gcc4-m68000 693 cdate Fri Feb 8 10:29:37 PST 2008 694 mdate Sun May 4 15:37:19 UTC 2008 695 who mrg, tsutsui 696 file rescue/Makefile : 1.21 697 file sbin/dump_lfs/Makefile : 1.9 698 file sbin/fsck_ffs/Makefile : 1.35 699 file sbin/fsdb/Makefile : 1.22 700 file share/mk/sys.mk : 1.96 701 file usr.sbin/ndbootd/Makefile : 1.5 702 descr 703 Several internal compiler errors with gcc -O1 704 around 64bit integer arithmetic. 705 This hack uses -O1 and adds some -fno-tree-foo options 706 to avoid the problem. 707 This might be related with GCC Bugzilla Bug 32424. 708 kcah 709 710 port m68k,sh3,vax 711 712 hack gcc-4.8.1 713 cdate Wed Nov 6 20:41:35 EST 2013 714 who christos 715 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 716 descr 717 compile hashtable_c++0x.cc with -O2 instead of -Os to 718 produce missing instantiation of std::lower_bound expansion 719 for unsigned long. 720 kcah 721 722 port sparc 723 724 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 725 cdate Sun Aug 14 19:26:48 PDT 2011 726 who mrg 727 file sys/arch/sparc64/sparc/cpu.c : 1.234 728 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 729 file sys/arch/sparc64/sparc/genassym.cf : 1.67 730 file sys/arch/sparc64/sparc/locore.s : 1.265 731 descr 732 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 733 Post newlock2 there was a bug where a lock was reduced from 734 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 735 would crash due to NULL IPI. This was fixed by re-using the 736 right IPL value. However, GCC 4.5.3 build kernels have the 737 same problems. For now, the hack is re-instated. 738 kcah 739 740 741 port mips 742 743 hack mips-shared-linker-load-address 744 cdate Fri Oct 7 08:33:10 UTC 2005 745 who simonb 746 file src/sys/kern/exec_elf32.c : 1.107 747 descr 748 With COMPAT_16 or previous enabled (which enables 749 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 750 load and run at address 0. The check to fix this in 751 rev 1.107 only checks the first psection of the ELF 752 executable, which may not be loadable. A more correct 753 fix is to check the first loadable psection instead of 754 just the first psection. 755 kcah 756 757 hack mips-duplicate-ras-end-label 758 cdate Sat Sep 2 23:29:42 2006 759 who martin 760 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 761 descr 762 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 763 labels by duplicated __asm output from RAS_END() 764 macro. 765 kcah 766 767 hack mips-mcount-assembler-warning 768 cdate Tue Jul 29 14:16:52 UTC 2008 769 who lukem 770 file src/lib/libc/gmon/Makefile.inc : 1.8 771 descr 772 Workaround for PR port-mips/39192. 773 common/lib/libc/gmon/mcount.c generates a (fatal) 774 assembler warning on MIPS: 775 Warning: No .cprestore pseudo-op used in PIC code 776 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 777 kcah 778 779 port i386 780 781 hack use volatile intermediate variable to enforce rounding 782 cdate Tue Aug 1 22:15:55 MEST 2006 783 who drochner 784 file src/lib/libm/src/lrintf.c : 1.4 785 file src/lib/libm/src/s_rintf.c : 1.8 786 descr 787 gcc-4 does subsequent operations on "float" values within 788 the i387 FPU without rounding the intermediate results 789 kcah 790 791 port powerpc 792 793 hack avoid using __builtin_return_address(0) because it fails in 794 Xorg's module loader 795 cdate Sat Sep 27 03:52:05 UTC 2008 796 who macallan 797 file src/libexec/ld.elf_so/rtld.c : 1.121 798 descr 799 workaround for PR port-macppc/37812 800 kcah 801 802 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 803 building the native compiler via build.sh those don't defined 804 properly. 805 cdate Sat Mar 12 08:00:00 UTC 2011 806 who matt 807 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 808 descr 809 see above 810 kcah 811 812 port powerpc64 813 814 hack include _errno.c in libposix so that __errno resolves. It 815 should resolve from libc's errno, but somehow it does not. 816 Linker bug? 817 cdate Thu Oct 27 13:19:47 EDT 2011 818 who christos 819 file src/lib/libposix/Makefile: 1.15 820 file src/lib/librt/Makefile: 1.14 821 descr 822 workaround for: 823 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 824 R_PPC64_REL24 relocation against symbol `.__errno' 825 kcah 826 827 hack rename data() function in mdocml to avoid redefined error. 828 Compiler/Assembler bug? 829 cdate Sat Oct 29 11:16:01 EDT 2011 830 who christos 831 file src/external/bsd/mdocml/tbl_data.c: 1.2 832 descr 833 workaround for: 834 {standard input}: Assembler messages: 835 {standard input}:105: Error: symbol `.data' is already \ 836 defined 837 kcah 838 839 port emips 840 841 hack Add nop between ctc1 and mtc0 to avoid assembler internal 842 error 843 cdate Sat Oct 29 16:57:34 EDT 2011 844 who christos 845 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 846 descr 847 workaround for: 848 {standard input}: Assembler messages: 849 {standard input}:730: Internal error! 850 Assertion failure in append_insn at /usr/src/external/gpl3/\ 851 binutils/dist/gas/config/tc-mips.c line 2910. 852 kcah 853 854 port ia64 855 856 hack libc hesiod.c file does not compile with -O2 (internal 857 compiler error in gcc 4.5.3) 858 cdate Thu Dec 27 08:05:43 CET 2012 859 who martin 860 file src/lib/libc/net/Makefile.inc: 1.82 861 descr 862 workaround for: 863 {standard input}: Assembler messages: 864 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 865 {standard input}:1506: Warning: This is the location of the conflicting usage 866 {standard input}: Error: 2 warnings, treating warnings as errors 867 kcah 868 869 hack libelf libelf_extended.c compiler error in gcc 4.5.3 870 cdate Thu Dec 27 09:05:51 CET 2012 871 who martin 872 file src/external/bsd/libelf/lib/Makefile: 1.3 873 descr 874 workaround for: 875 {standard input}: Assembler messages: 876 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 877 {standard input}:87: Warning: Only the first path encountering the conflict is reported 878 {standard input}:85: Warning: This is the location of the conflicting usage 879 kcah 880 881 hack compiler error with gcc 4.5.x 882 cdate Thu Dec 27 15:15:25 CET 2012 883 who martin 884 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 885 descr 886 workaround for: 887 {standard input}: Assembler messages: 888 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 889 {standard input}:22978: Warning: This is the location of the conflicting usage 890 kcah 891 892 port x68k 893 894 hack compiler error with gcc 4.5.x 895 cdate Fri May 24 13:23:01 EDT 2013 896 who christos 897 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 898 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 899 src/x11/lib/GLU/Makefile: 1.9 900 descr 901 workaround for: 902 internal compiler error: in cselib_record_set, at cselib.c:1999 903 kcah 904 905 hack fallback to /usr/bin/clang-cpp in rpcgen 906 cdate Wed Jun 5 15:49:27 CEST 2013 907 who joerg 908 file src/usr.bin/rpcgen/rpc_main.c 909 descr 910 It is undecided which compiler owns /usr/bin/cpp and whether it should 911 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 912 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 913 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 914 kcah 915 916 port hp700 917 918 hack compiler error with gcc 4.5.x 919 cdate Tue Jul 23 07:42:28 BST 2013 920 who skrll 921 file src/sys/lib/libkern/Makefile.libkern: 1.26 922 descr 923 workaround for unanalysed codegen bug affecting md5c.c. 924 kcah 925
Indexes created Wed Nov 05 19:10:08 GMT 2025