HACKS revision 1.88
1 # $NetBSD: HACKS,v 1.88 2006/10/29 23:02:25 uwe 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 GCC2 isn't C99 88 cdate 5 December 2003 89 who mrg 90 file gnu/dist/binutils/ld/ldlex.c: r1.2 91 descr 92 ldlex.c is generated from ldlex.l and we get macro redefinition 93 errors from it if __STDC_VERSION__ is not C99 compliant. This 94 hack forces NetBSD 1.6 and later systems to also include <stdint.h> 95 to get the relevant definitions. This hack should be backed out 96 when all platforms have switched away from GCC2. 97 kcah 98 99 hack gcc-strict-aliasing 100 cdate 6 August 2004 101 who junyoung 102 pr 26516 103 file src/usr.sbin/racoon/racoon/Makefile : 1.21 104 descr 105 GCC issues a warning "dereferencing type-punned pointer will break 106 strict-aliasing rules" when compiling 107 crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this 108 is due to use of type casting in a non-standard way in the code and 109 not a compiler bug. Once a new release of KAME with a proper fix 110 applied is imported this should be backed out. 111 kcah 112 113 hack gcc 3.3.3 wrong uninitialised variable 114 mdate 12 May 2006 115 who he 116 file usr.bin/msgc/msg_sys.def : 1.33-1.34 117 file distrib/utils/sysinst/aout2elf.c : 1.11 118 descr 119 Gcc 3.3.3 gets some -Wuninitialized warnings wrong. This is 120 just one of many in the tree, marked with 121 /* XXX -Wuninitialized [arch] */ 122 in the source. 123 kcah 124 125 hack gcc4 wrong uninitialized variable 126 mdate 10 May 2006 127 who mrg 128 file bin/ksh/eval.c : 1.6 129 file bin/sh/histedit.c : 1.39 130 file bin/sh/parser.c : 1.60 131 file bin/systrace/systrace.c : 1.33 132 file crypto/dist/heimdal/kdc/524.c : 1.10 133 file crypto/dist/ssh/sftp.c : 1.20 134 file crypto/dist/ssh/ssh-keysign.c : 1.11 135 file dist/ipf/lib/hostname.c : 1.2 136 file dist/ipf/tools/ipmon.c : 1.8 137 file dist/ntp/ntpd/ntp_request.c : 1.4 138 file dist/ntp/ntpd/refclock_shm.c : 1.4 139 file dist/ntp/sntp/timing.c : 1.3 140 file dist/pppd/pppstats/pppstats.c : 1.3 141 file dist/smbfs/lib/smb/rap.c : 1.6 142 file dist/tcpdump/print-zephyr.c : 1.5 143 file distrib/utils/sysinst/aout2elf.c : 1.12 144 file gnu/libexec/uucp/uucico/uucico.c : 1.6 145 file lib/libc/citrus/citrus_csmapper.c : 1.6 146 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 147 file lib/libc/inet/inet_cidr_ntop.c : 1.3 148 file lib/libc/inet/inet_ntop.c : 1.3 149 file lib/libc/stdio/vfwprintf.c : 1.8 150 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 151 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 152 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 153 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 154 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 155 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 156 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 157 file sbin/fsck_ext2fs/dir.c : 1.19 158 file sbin/routed/rtquery/rtquery.c : 1.18 159 file sys/arch/amd64/amd64/pmap.c : 1.26 160 file sys/arch/i386/pci/piixpcib.c : 1.4 161 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 162 file sys/crypto/cast128/cast128.c : 1.9 163 file sys/ddb/db_command.c : 1.86 164 file sys/dev/cardbus/cardbus_map.c : 1.21 165 file sys/dev/fss.c : 1.25 166 file sys/dev/ic/igsfb.c : 1.39 167 file sys/dev/ic/mb86950.c : 1.5 168 file sys/dev/ic/midway.c : 1.71 169 file sys/dev/kttcp.c : 1.18 170 file sys/dev/rasops/rasops_bitops.h : 1.9 171 file sys/dev/pci/cmpci.c : 1.31 172 file sys/dev/pci/machfb.c : 1.45 173 file sys/dev/usb/ohci.c : 1.174 174 file sys/dev/usb/uhci.c : 1.196 175 file sys/dev/rasops/rasops_bitops.h : 1.9 176 file sys/dist/ipf/netinet/ip_nat.c : 1.10 177 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 178 file sys/dist/pf/net/pf.c : 1.22 179 file sys/fs/udf/udf_vnops.c : 1.4 180 file sys/kern/kern_sig.c : 1.219 181 file sys/kern/tty.c : 1.181 182 file sys/net/bpf.c : 1.116 183 file sys/net/zlib.c : 1.26 184 file sys/netccitt/if_x25subr.c : 1.37 185 file sys/netinet/in.c : 1.107 186 file sys/netsmb/smb_smb.c : 1.27 187 file sys/netsmb/smb_trantcp.c : 1.22 188 file sys/nfs/nfs_serv.c : 1.108 189 file sys/nfs/nfs_socket.c : 1.129 190 file sys/nfs/nfs_syscalls.c : 1.91 191 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 192 file usr.bin/ftp/ftp.c : 1.140 193 file usr.bin/find/function.c : 1.54 194 file usr.bin/mail/tty.c : 1.20 195 file usr.bin/nl/nl.c : 1.7 196 file usr.bin/systat/keyboard.c : 1.23 197 file usr.bin/usbhidctl/usbhid.c : 1.29 198 file usr.bin/vi/cl/cl_read.c : 1.5 199 file usr.bin/vi/ex/ex_cscope.c : 1.12 200 file usr.bin/vi/ex/ex_tag.c : 1.19 201 file usr.bin/vi/vi/v_txt.c : 1.15 202 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 203 file usr.sbin/cron/do_command.c : 1.19 204 file usr.sbin/timed/timed/slave.c : 1.15 205 descr 206 GCC 4.1 gets many uninitialised variable warnings wrong. We should 207 really audit all the old hacks like this when older compilers are 208 removed from the tree, as many are probably no longer required. 209 The problem is that it does not recognize initialization via function 210 call pointer. I.e. 211 int p; 212 foo(&p); 213 does not mark p as initialized. 214 kcah 215 216 hack gcc4 pointer sign and strict aliasing problems 217 mdate 10 May 2006 218 who mrg 219 file bin/ed/Makefile : 1.33 220 file bin/systrace/Makefile : 1.12 221 file distrib/utils/sysinst/Makefile.inc : 1.44 222 file games/bcd/Makefile : 1.5 223 file games/dab/Makefile : 1.5 224 file games/larn/Makefile : 1.17 225 file games/pom/Makefile : 1.5 226 file lib/libasn1/Makefile : 1.26 227 file lib/libcrypt/Makefile : 1.17 228 file lib/libgssapi/Makefile : 1.16 229 file lib/libhdb/Makefile : 1.20 230 file lib/libkadm5clnt/Makefile : 1.21 231 file lib/libkadm5srv/Makefile : 1.25 232 file lib/libkrb5/Makefile : 1.35 233 file lib/libssh/Makefile : 1.6 234 file lib/libtelnet/Makefile : 1.26 235 file libexec/getty/Makefile : 1.14 236 file libexec/kadmind/Makefile : 1.19 237 file libexec/kpasswdd/Makefile : 1.14 238 file sbin/atactl/Makefile : 1.3 239 file sbin/cgdconfig/Makefile : 1.7 240 file sbin/clri/Makefile : 1.13 241 file sbin/dkctl/Makefile : 1.4 242 file sbin/dump/Makefile : 1.33 243 file sbin/fdisk/Makefile : 1.35 244 file sbin/fsck_ext2fs/Makefile : 1.11 245 file sbin/fsck_ffs/Makefile : 1.29 246 file sbin/fsdb/Makefile : 1.18 247 file sbin/mount_smbfs/Makefile : 1.4 248 file sbin/newfs/Makefile : 1.30 249 file sbin/newfs_sysvbfs/Makefile : 1.2 250 file sbin/restore/Makefile : 1.23 251 file sbin/veriexecctl/Makefile : 1.11 252 file sys/lib/libsa/Makefile : 1.59 253 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 254 file usr.bin/awk/Makefile : 1.9 255 file usr.bin/crontab/Makefile : 1.24 256 file usr.bin/ctags/Makefile : 1.8 257 file usr.bin/gzip/Makefile : 1.10 258 file usr.bin/ssh/sftp/Makefile : 1.10 259 file usr.bin/ssh/ssh/Makefile : 1.25 260 file usr.bin/vi/build/Makefile : 1.26 261 file usr.bin/telnet/Makefile : 1.40 262 file usr.bin/tn3270/tn3270/Makefile : 1.36 263 file usr.bin/tr/Makefile : 1.4 264 file usr.sbin/amd/amd/Makefile : 1.27 265 file usr.sbin/amd/amq/Makefile : 1.14 266 file usr.sbin/amd/libamu/Makefile : 1.20 267 file usr.sbin/amd/pawd/Makefile : 1.5 268 file usr.sbin/bind/Makefile.inc : 1.22 269 file usr.sbin/bind/libdns/Makefile : 1.3 270 file usr.sbin/bind/named/Makefile : 1.17 271 file usr.sbin/bootp/bootptest/Makefile : 1.2 272 file usr.sbin/chrtbl/Makefile : 1.6 273 file usr.sbin/cron/Makefile : 1.12 274 file usr.sbin/dhcp/Makefile.inc : 1.20 275 file usr.sbin/dumplfs/Makefile : 1.11 276 file usr.sbin/hprop/Makefile : 1.13 277 file usr.sbin/installboot/Makefile : 1.35 278 file usr.sbin/ipf/ipftest/Makefile : 1.32 279 file usr.sbin/isdn/isdnd/Makefile : 1.6 280 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 281 file usr.sbin/isdn/isdntel/Makefile : 1.2 282 file usr.sbin/isdn/isdntrace/Makefile : 126 283 file usr.sbin/mopd/common/Makefile : 1.10 284 file usr.sbin/mopd/mopd/Makefile : 1.9 285 file usr.sbin/mopd/mopprobe/Makefile : 1.7 286 file usr.sbin/makefs/Makefile : 1.17 287 file usr.sbin/mscdlabel/Makefile : 1.5 288 file usr.sbin/pkg_install/add/Makefile : 1.7 289 file usr.sbin/pkg_install/create/Makefile : 1.5 290 file usr.sbin/pkg_install/lib/Makefile : 1.28 291 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 292 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 293 file usr.sbin/pppd/Makefile.inc : 1.3 294 file usr.sbin/pppd/pppd/Makefile : 1.38 295 file usr.sbin/rarpd/Makefile : 1.10 296 file usr.sbin/rbootd/Makefile : 1.10 297 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 298 file usr.sbin/rtadvd/Makefile : 1.9 299 file usr.sbin/tcpdump/Makefile : 1.42 300 file usr.sbin/wiconfig/Makefile : 1.3 301 descr 302 GCC 4.1 warns on pointer sign comparision/assignments and lots of 303 code does not conform. For now we use -Wno-pointer-sign and 304 -fno-strict-aliasing. 305 kcah 306 307 port vax 308 309 hack gcc4/vax compiler crash 310 cdate Fri Jun 30 22:39:12 PDT 2006 311 who mrg 312 file bin/csh/Makefile : 1.27 313 file lib/i18n_module/UTF7/Makefile : 1.2 314 descr 315 GCC4 on vax crashes. -O0 stops it happening so far... 316 kcah 317 318 hack gcc 2.95/vax doesn't like abort being used as function pointer 319 cdate Tue Dec 13 05:54:50 GMT 2005 320 who jmc 321 file lib/libc/rpc/svc_vc.c 1.15 322 descr 323 Provide a local definition for abort which doesn't include 324 the noreturn attribute which trips up gcc 2.95 on vax. 325 kcah 326 327 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 328 cdate Mon May 9 12:16:22 CDT 2005 329 who jmc 330 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 331 gnu/usr.bin/gettext/libgrep/Makefile 1.3 332 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 333 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 334 descr 335 The latest gettext assumes a C99 environment or at least 336 configure checks to work around this. As we don't use configure 337 provide a stdbool.h for vax builds locally in directories from 338 the template provided by the gettext code. 339 kcah 340 341 hack gcc 2.95/vax cannot handle __builtin_ffs() 342 cdate Fri Aug 23 21:31:15 CEST 2002 343 who ragge 344 file sys/lib/libkern/libkern.h : 1.42 345 descr 346 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 347 added this feature to GCC 3 so it can be removed when switching. 348 kcah 349 350 hack gcc-vax-libbz2 351 mdate 27 Jun 2002 352 who thorpej 353 file lib/libbz2/Makefile 354 descr 355 libbz2 is mis-compiled with optimization with GCC 2.95.3 356 on VAX. -O0 works around this problem. 357 kcah 358 359 hack vax Toolchain bug 360 cdate 28 Mar 2003 361 who he 362 file sys/arch/vax/vax/intvec.S : 1.5 363 descr 364 Workaround for PR toolchain/20924. The assembler apparently 365 tries to range-check byte offsets when it doesn't have 366 sufficient information to make that decision. 367 Workaround uses `brw' instead of `brb' instruction. 368 kcah 369 370 hack vax gcc 2.95.3 -Wuninitialized workarounds 371 cdate 6 Nov 2003 372 who he 373 file sys/dev/bi/if_ni.c : 1.22 374 file sys/arch/vax/vax/ctu.c : 1.20 375 descr 376 Workaround for gcc 2.95.3 failing to detect that certain 377 variables will be initialized; so that this code compiles 378 with -Wuninitialized. Should be reviewed and possibly 379 reverted when gcc 3.3.2 is ready for vax. 380 kcah 381 382 hack vax gcc 2.95.3 structure initialization 383 cdat 13 May 2004 384 who cl 385 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 386 descr 387 Workaround for gcc 2.95.3 failing to initialize structures 388 and/or unions inside structures using nested designators. 389 Should be reverted when gcc >=3.3.3 is ready for vax. 390 kcah 391 392 hack vax gcc 2.95.3 needs -I. to build nslexer.c 393 cdat 6 Jun 2004 394 who mhitch 395 file lib/libc/arch/vax/Makefile.inc : 1.6 396 descr 397 It appears necessary to add -I. to CPPFLAGS when building 398 nslesxer.c. This may be caused by gcc 2.95.3 being used. 399 Should be reverted when a newer gcc is ready for vax. 400 kcah 401 402 hack vax gcc 2.95.3 doesn't understand "-std=c99" 403 cdat 5 April 2005 404 who tron 405 file src/share/mk/bsd.sys.mk 406 descr 407 We cannot use "-std=c99" for compiler warning level 4 and above 408 because gcc 2.95.3 doesn't support that option. 409 kcah 410 411 hack declare boolean_t in two IPF user-mode programs 412 cdate Tue Mar 7 19:19:20 CET 2006 413 who he 414 file dist/ipf/ipsend/iptests.c : 1.8 415 dist/ipf/ipsend/sock.c : 1.7 416 descr 417 The IPF user-mode programs ipsend and iptest first 418 include <sys/types.h> without _KERNEL defined, and 419 later include <sys/file.h> with _KERNEL defined. 420 This causes a build failure when building for vax, 421 since <sys/device.h> ends up being included without 422 bollean_t being defined by <sys/types.h>. 423 Build failure and further details documented in 424 PR#32907. 425 kcah 426 427 port arm 428 429 hack gcc-unsigned-compare 430 cdate 09 Mar 2002 431 mdate 18 Mar 2002 432 who bjh21 433 file dist/bind/lib/nameser/ns_parse.c : 1.3 434 file dist/dhcp/minires/ns_parse.c : 1.3 435 file dist/dhcp/omapip/result.c : 1.2 436 file dist/dhcp/server/failover.c : 1.3 437 file gnu/dist/toolchain/bfd/bfd.c : 1.2 438 file gnu/dist/toolchain/bfd/format.c : 1.2 439 file gnu/dist/toolchain/gdb/target.c : 1.2 440 file sys/kern/vfs_subr.c : 1.172 441 descr When checking that a potentially-unsigned enum is >= 0, assign 442 it to an int first. This is necessary to avoid "comparison is 443 always true" warnings with -fshort-enums. Casting to an int 444 really should be enough, but turns out not to be. 445 kcah 446 447 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 448 cdate Tue Oct 28 18:02:16 GMT 2003 449 who skrll 450 pr 23044 451 file sys/arch/arm/conf/Makefile.arm : 1.19 452 descr 453 Performing a build.sh tools on a CATS with NFS mounted 454 obj and src directories results in "panic: receive 1" 455 The hack is to compile sys/kern/uipc_socket.c with 456 -fno-strict-aliasing 457 kcah 458 459 460 port pc532 461 462 hack egcs-pc532-ip6_mroute 463 cdate 09 Jul 2002 464 who simonb 465 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 466 file sys/arch/pc532/conf/files.pc532 : 1.47 467 descr 468 egcs 1.1.2 gets an "internal error--insn does not satisfy its 469 constraints" error compiling ip6_mroute.c with -O2 or greater. 470 -O1 works around this problem. 471 kcah 472 473 hack gcc-pc532-duffs_device 474 cdate Mon Oct 27 07:23:05 UTC 2003 475 who simonb 476 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 477 file sys/arch/pc532/conf/files.pc532 : 1.52 478 pr GCC PR optimization/5230 479 descr 480 gcc incorrectly gives an "unreachable code at beginning of 481 switch statement" for a Duff's device construct in 482 arch/pc532/dev/ncr.c. There is no way to disable just this 483 warning, so -Wno-error is turned on for this file. 484 kcah 485 486 hack gcc332-cppmacro-ice 487 cdate Sun Dec 7 12:48:33 UTC 2003 488 who simonb 489 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 490 descr 491 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 492 The hack is to use -O1 for this file. Fixed in gcc 493 -current mainline, unable to work out where the fix is 494 right now. 495 kcah 496 497 498 port sh3 499 500 hack gcc4-sh3-bz2 501 mdate 20 May 2006 502 who mrg 503 file lib/libbz2/Makefile : 1.10 504 descr 505 The in-tree GCC 4.1-based compiler generated too-far 506 pc-relative addresses. Hack is to build with -O0. 507 kcah 508 509 510 port sh5 511 512 hack SuperH SH5 Toolchain Bugs 513 cdate 11 Jul 2002 514 who scw 515 file usr.sbin/ndbootd/ndbootd.c : 1.6 516 file usr.sbin/traceroute/traceroute.c : 1.48 517 descr 518 The SuperH SH5 toolchain (2.97-sh5-010522) gets an internal 519 compiler error when assigning a bit-wise inverted value 520 under some circumstances. 521 Work around it by splitting the statement into two. 522 kcah 523 524 hack SuperH SH5 Toolchain Bugs 525 cdate 17 May 2003 526 who scw 527 file lib/libpthread/pthread_lock.c : 1.7 528 descr 529 The SuperH SH5 toolchain generates incorrect PIC code when 530 faced with a symbol which is declared extern, but has local 531 scope due to being defined within an asm() statement (without 532 being declared .globl in that statement). Work around it by 533 adding the .globl. 534 kcah 535 536 hack gcc 3.3.2 on sh5 - ICE compiling reload1.c at -O2 537 cdate Sun Dec 7 19:44:05 GMT 2003 538 who scw 539 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 540 descr 541 Gcc3 for sh5 gets an ICE compiling reload1.c at -O2. 542 Drop to -O1 for now when building for sh5. 543 kcah 544 545 hack gcc 3.3.2 on sh5 - ICE compiling elf32.c/elf64.c at -O2 546 cdate Sun Dec 7 21:10:46 GMT 2003 547 who scw 548 file gnu/lib/libbfd/Makefile : 1.39 549 descr 550 Gcc3 for sh5 gets an ICE compiling libbfd's elf32.c 551 and elf64.c at -O2. 552 Drop to -O1 for now when building for sh5. 553 kcah 554 555 556 hack gcc 3.3.2 on sh5 - fatal warning compiling function.c 557 cdate Sun Dec 7 19:44:05 GMT 2003 558 who scw 559 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 560 descr 561 Gcc3 for sh5 issues a warning: 562 .../gnu/dist/gcc/gcc/function.c:4742: warning: `and' of 563 mutually exclusive equal-tests is always 0. 564 This causes the build to fail because of -Werror. 565 Work-around by defining NOGCCERROR when building for sh5. 566 kcah 567 568 hack gcc 3.3.3 on sh5 - ICE compiling rbtdb.c and rbtdb64.c 569 cdate Thu Nov 11 00:35:33 UTC 2004 570 who he 571 file usr.sbin/bind/libdns/Makefile/1.2 572 descr 573 Gcc3 for sh5 gets an ICE compiling these files at -O2. 574 Drop to -O1 for now when building for sh5. 575 kcah 576 577 hack gcc 3.3.3 nb3 on sh5 - ICE compiling bsd-comp.c 578 cdate Thu May 25 23:05:20 UTC 2005 579 who he 580 file sys/lkm/net/bsdcomp/Makefile : 1.3 581 descr 582 Gcc3 for sh5 gets an ICE compiling this at -O2, 583 "could not split insn". Drop to -O1 for sh5. 584 kcah 585 586 hack gcc 3.3.3 nb3 on sh5 - ICE compiling strtod.c 587 cdate Tue Jan 31 10:51:52 GMT 2006 588 who scw 589 file lib/libc/gdtoa/Makefile.inc : 1.2 590 descr 591 Gcc3 for sh5 gets an ICE compiling this at -O2, 592 "could not split insn". Drop to -O1 for sh5. 593 kcah 594 595 port sun2 596 597 hack gcc 3.3.2/mdsetimage 598 cdate Tue Oct 28 18:43:05 EST 2003 599 who fredette 600 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 601 descr 602 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 603 this hack uses -O0 to avoid the problem. 604 kcah 605 606 hack gcc 3.3.2/installboot/ffs.c 607 cdate Tue Oct 28 18:43:05 EST 2003 608 who fredette 609 file usr.sbin/installboot/Makefile : 1.26 610 descr 611 ffs.c causes cc1 to barf for as-yet unknown reasons. this 612 hack uses -O0 to avoid the problem. 613 kcah 614 615 hack gcc 4.1.1/fsck_ffs/pass1.c 616 cdate Fri Jun 23 10:30:25 PDT 2006 617 who mrg 618 file sbin/fsck_ffs/Makefile : 1.30 619 file sbin/fsdb/Makefile : 1.19 620 file sbin/dump_lfs/Makefile : 1.9 621 file usr.sbin/ndbootd/Makefile : 1.2 622 descr 623 pass1.c causes cc1 to barf for as-yet unknown reasons. this 624 hack uses -O0 to avoid the problem. (these all seem to be the 625 same problem.) 626 kcah 627 628 629 port m68000 630 631 hack gcc 3.3.2/gcc/ra-colorize.c 632 cdate Wed Nov 5 11:03:13 EST 2003 633 who mrg 634 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 635 descr 636 ra-colorize.c causes a whole spew of unreferenced .L* local 637 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 638 Note this has been fixed in 3.3.3 at least on m68k, 639 but it hasn't been confirmed on sun2/m68000. 640 (it's too slow even on emulator and unlikely to build 641 toolchains on sun2 with its maximum 4MB RAM) 642 kcah 643 644 port sparc64 645 646 hack disable optimzations for uvm_bio.c on 32 bit kernels 647 cdate Sun Mar 21 14:14:04 MET 2004 648 who martin 649 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 650 file sys/arch/sparc64/conf/files.sparc64 : 1.93 651 descr 652 The sparc compiler miscompiles uvm_bio.c when using 653 any optimization. This results in ubc_release panics. 654 kcah 655 656 port macppc 657 658 hack remove inline from rotate_{left,right} 659 cdate Tue Feb 22 13:43:25 EST 2005 660 who christos 661 file src/dist/bind/lib/dns/rbt.c 662 descr 663 The macppc gcc-3.3 compiler miscompiles rbt.c when these 664 functions are inlined. The error is: 665 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 666 .* named[368]: exiting (due to assertion failure) 667 This is reportedly fixed in gcc-3.4 668 kcah 669 670 port hppa 671 672 hack hppa-gcc-3.3.3/grep/dfa.c 673 cdate Sun Aug 8 08:34:32 PDT 2004 674 who chs 675 file gnu/usr.bin/grep/grep/Makefile : 1.4 676 descr 677 gcc 3.3.3 generates bad code for dfa.c with -O2, 678 reduce optimization to -O1 to avoid the bug. 679 kcah 680 681 hack hppa boot-from-disk memory corruption 682 cdate Wed May 18 06:56:07 PDT 2005 683 who chs 684 file src/sys/dev/scsipi/scsipiconf.h : 1.98 685 descr 686 There is some bug with DMA on hppa that corrupts scsipi_xfer 687 structures, but it only shows up when booting from disk. 688 For now, we'll add some padding to scsipi_xfer so that 689 the corrupted memory is not otherwise used. 690 kcah 691 692 port mips 693 694 hack mips-shared-linker-load-address 695 cdate Fri Oct 7 08:33:10 UTC 2005 696 who simonb 697 file src/sys/kern/exec_elf32.c : 1.107 698 descr 699 With COMPAT_16 or previous enabled (which enables 700 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 701 load and run at address 0. The check to fix this in 702 rev 1.107 only checks the first psection of the ELF 703 executable, which may not be loadable. A more correct 704 fix is to check the first loadable psection instead of 705 just the first psection. 706 kcah 707 708 hack mips-duplicate-ras-end-label 709 cdate Sat Sep 2 23:29:42 2006 710 who martin 711 file src/regres/sys/kern/ras/ras3/Makefile : 1.3 712 descr 713 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 714 labels by duplicated __asm output from RAS_END() 715 macro. 716 kcah 717 718 port i386 719 720 hack minus-Os-broken-machdep-c 721 cdate Mon Jul 31 13:09:01 EDT 2006 722 who christos 723 file src/sys/arch/machdep.c : 1.576 724 descr 725 gcc-4 miscompiles this file with -Os and the resulting 726 kernel resets as reported in PR33725 727 kcah 728 729 hack use volatile intermediate variable to enforce rounding 730 cdate Tue Aug 1 22:15:55 MEST 2006 731 who drochner 732 file src/lib/libm/src/lrintf.c : 1.4 733 file src/lib/libm/src/s_rintf.c : 1.8 734 descr 735 gcc-4 does subsequent operations on "float" values within 736 the i387 FPU without rounding the intermediate results 737 kcah 738
Indexes created Wed Nov 05 21:10:10 GMT 2025