HACKS revision 1.86
1 # $NetBSD: HACKS,v 1.86 2006/09/28 21:01:21 skrll 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 can't handle __used__ 342 cdate Fri May 6 14:30:53 CDT 2005 343 who jmc 344 file src/lib/libc/gmon/mcount.c 1.17 345 src/usr.bin/config/main.c 1.11 346 descr 347 Recent changes to mark this as __used__ to prevent optimization 348 away on sparc64 don't work on 2.95 vax. Ifdef'd back in the 349 old __unused__ if on vax. 350 kcah 351 352 hack gcc 2.95/vax cannot handle __builtin_ffs() 353 cdate Fri Aug 23 21:31:15 CEST 2002 354 who ragge 355 file sys/lib/libkern/libkern.h : 1.42 356 descr 357 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 358 added this feature to GCC 3 so it can be removed when switching. 359 kcah 360 361 hack gcc-vax-libbz2 362 mdate 27 Jun 2002 363 who thorpej 364 file lib/libbz2/Makefile 365 descr 366 libbz2 is mis-compiled with optimization with GCC 2.95.3 367 on VAX. -O0 works around this problem. 368 kcah 369 370 hack gawk 371 mdate 8 Nov 2003 372 who ragge 373 file gnu/usr.bin/gawk/Makefile 374 descr 375 gawk is mis-compiled with optimization with GCC 2.95.3 376 on VAX. -O0 works around this problem. 377 kcah 378 379 hack vax Toolchain bug 380 cdate 28 Mar 2003 381 who he 382 file sys/arch/vax/vax/intvec.S : 1.5 383 descr 384 Workaround for PR toolchain/20924. The assembler apparently 385 tries to range-check byte offsets when it doesn't have 386 sufficient information to make that decision. 387 Workaround uses `brw' instead of `brb' instruction. 388 kcah 389 390 hack vax gcc 2.95.3 -Wuninitialized workarounds 391 cdate 6 Nov 2003 392 who he 393 file sys/dev/bi/if_ni.c : 1.22 394 file sys/arch/vax/vax/ctu.c : 1.20 395 descr 396 Workaround for gcc 2.95.3 failing to detect that certain 397 variables will be initialized; so that this code compiles 398 with -Wuninitialized. Should be reviewed and possibly 399 reverted when gcc 3.3.2 is ready for vax. 400 kcah 401 402 hack vax gcc 2.95.3 structure initialization 403 cdat 13 May 2004 404 who cl 405 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 406 descr 407 Workaround for gcc 2.95.3 failing to initialize structures 408 and/or unions inside structures using nested designators. 409 Should be reverted when gcc >=3.3.3 is ready for vax. 410 kcah 411 412 hack vax gcc 2.95.3 needs -I. to build nslexer.c 413 cdat 6 Jun 2004 414 who mhitch 415 file lib/libc/arch/vax/Makefile.inc : 1.6 416 descr 417 It appears necessary to add -I. to CPPFLAGS when building 418 nslesxer.c. This may be caused by gcc 2.95.3 being used. 419 Should be reverted when a newer gcc is ready for vax. 420 kcah 421 422 hack vax gcc 2.95.3 doesn't understand "-std=c99" 423 cdat 5 April 2005 424 who tron 425 file src/share/mk/bsd.sys.mk 426 descr 427 We cannot use "-std=c99" for compiler warning level 4 and above 428 because gcc 2.95.3 doesn't support that option. 429 kcah 430 431 hack declare boolean_t in two IPF user-mode programs 432 cdate Tue Mar 7 19:19:20 CET 2006 433 who he 434 file dist/ipf/ipsend/iptests.c : 1.8 435 dist/ipf/ipsend/sock.c : 1.7 436 descr 437 The IPF user-mode programs ipsend and iptest first 438 include <sys/types.h> without _KERNEL defined, and 439 later include <sys/file.h> with _KERNEL defined. 440 This causes a build failure when building for vax, 441 since <sys/device.h> ends up being included without 442 bollean_t being defined by <sys/types.h>. 443 Build failure and further details documented in 444 PR#32907. 445 kcah 446 447 port arm 448 449 hack gcc-unsigned-compare 450 cdate 09 Mar 2002 451 mdate 18 Mar 2002 452 who bjh21 453 file dist/bind/lib/nameser/ns_parse.c : 1.3 454 file dist/dhcp/minires/ns_parse.c : 1.3 455 file dist/dhcp/omapip/result.c : 1.2 456 file dist/dhcp/server/failover.c : 1.3 457 file gnu/dist/gawk/eval.c : 1.4 458 file gnu/dist/toolchain/bfd/bfd.c : 1.2 459 file gnu/dist/toolchain/bfd/format.c : 1.2 460 file gnu/dist/toolchain/gdb/target.c : 1.2 461 file sys/kern/vfs_subr.c : 1.172 462 descr When checking that a potentially-unsigned enum is >= 0, assign 463 it to an int first. This is necessary to avoid "comparison is 464 always true" warnings with -fshort-enums. Casting to an int 465 really should be enough, but turns out not to be. 466 kcah 467 468 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 469 cdate Tue Oct 28 18:02:16 GMT 2003 470 who skrll 471 pr 23044 472 file sys/arch/arm/conf/Makefile.arm : 1.19 473 descr 474 Performing a build.sh tools on a CATS with NFS mounted 475 obj and src directories results in "panic: receive 1" 476 The hack is to compile sys/kern/uipc_socket.c with 477 -fno-strict-aliasing 478 kcah 479 480 481 port pc532 482 483 hack egcs-pc532-ip6_mroute 484 cdate 09 Jul 2002 485 who simonb 486 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 487 file sys/arch/pc532/conf/files.pc532 : 1.47 488 descr 489 egcs 1.1.2 gets an "internal error--insn does not satisfy its 490 constraints" error compiling ip6_mroute.c with -O2 or greater. 491 -O1 works around this problem. 492 kcah 493 494 hack gcc-pc532-duffs_device 495 cdate Mon Oct 27 07:23:05 UTC 2003 496 who simonb 497 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 498 file sys/arch/pc532/conf/files.pc532 : 1.52 499 pr GCC PR optimization/5230 500 descr 501 gcc incorrectly gives an "unreachable code at beginning of 502 switch statement" for a Duff's device construct in 503 arch/pc532/dev/ncr.c. There is no way to disable just this 504 warning, so -Wno-error is turned on for this file. 505 kcah 506 507 hack gcc332-cppmacro-ice 508 cdate Sun Dec 7 12:48:33 UTC 2003 509 who simonb 510 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 511 descr 512 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 513 The hack is to use -O1 for this file. Fixed in gcc 514 -current mainline, unable to work out where the fix is 515 right now. 516 kcah 517 518 519 port sh3 520 521 hack gcc4-sh3-bz2 522 mdate 20 May 2006 523 who mrg 524 file lib/libbz2/Makefile : 1.10 525 descr 526 The in-tree GCC 4.1-based compiler generated too-far 527 pc-relative addresses. Hack is to build with -O0. 528 kcah 529 530 531 port sh5 532 533 hack SuperH SH5 Toolchain Bugs 534 cdate 11 Jul 2002 535 who scw 536 file usr.sbin/ndbootd/ndbootd.c : 1.6 537 file usr.sbin/traceroute/traceroute.c : 1.48 538 descr 539 The SuperH SH5 toolchain (2.97-sh5-010522) gets an internal 540 compiler error when assigning a bit-wise inverted value 541 under some circumstances. 542 Work around it by splitting the statement into two. 543 kcah 544 545 hack SuperH SH5 Toolchain Bugs 546 cdate 17 May 2003 547 who scw 548 file lib/libpthread/pthread_lock.c : 1.7 549 descr 550 The SuperH SH5 toolchain generates incorrect PIC code when 551 faced with a symbol which is declared extern, but has local 552 scope due to being defined within an asm() statement (without 553 being declared .globl in that statement). Work around it by 554 adding the .globl. 555 kcah 556 557 hack gcc 3.3.2 on sh5 - ICE compiling reload1.c at -O2 558 cdate Sun Dec 7 19:44:05 GMT 2003 559 who scw 560 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 561 descr 562 Gcc3 for sh5 gets an ICE compiling reload1.c at -O2. 563 Drop to -O1 for now when building for sh5. 564 kcah 565 566 hack gcc 3.3.2 on sh5 - ICE compiling elf32.c/elf64.c at -O2 567 cdate Sun Dec 7 21:10:46 GMT 2003 568 who scw 569 file gnu/lib/libbfd/Makefile : 1.39 570 descr 571 Gcc3 for sh5 gets an ICE compiling libbfd's elf32.c 572 and elf64.c at -O2. 573 Drop to -O1 for now when building for sh5. 574 kcah 575 576 577 hack gcc 3.3.2 on sh5 - fatal warning compiling function.c 578 cdate Sun Dec 7 19:44:05 GMT 2003 579 who scw 580 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 581 descr 582 Gcc3 for sh5 issues a warning: 583 .../gnu/dist/gcc/gcc/function.c:4742: warning: `and' of 584 mutually exclusive equal-tests is always 0. 585 This causes the build to fail because of -Werror. 586 Work-around by defining NOGCCERROR when building for sh5. 587 kcah 588 589 hack gcc 3.3.3 on sh5 - ICE compiling rbtdb.c and rbtdb64.c 590 cdate Thu Nov 11 00:35:33 UTC 2004 591 who he 592 file usr.sbin/bind/libdns/Makefile/1.2 593 descr 594 Gcc3 for sh5 gets an ICE compiling these files at -O2. 595 Drop to -O1 for now when building for sh5. 596 kcah 597 598 hack gcc 3.3.3 nb3 on sh5 - ICE compiling bsd-comp.c 599 cdate Thu May 25 23:05:20 UTC 2005 600 who he 601 file sys/lkm/net/bsdcomp/Makefile : 1.3 602 descr 603 Gcc3 for sh5 gets an ICE compiling this at -O2, 604 "could not split insn". Drop to -O1 for sh5. 605 kcah 606 607 hack gcc 3.3.3 nb3 on sh5 - ICE compiling strtod.c 608 cdate Tue Jan 31 10:51:52 GMT 2006 609 who scw 610 file lib/libc/gdtoa/Makefile.inc : 1.2 611 descr 612 Gcc3 for sh5 gets an ICE compiling this at -O2, 613 "could not split insn". Drop to -O1 for sh5. 614 kcah 615 616 port sun2 617 618 hack gcc 3.3.2/mdsetimage 619 cdate Tue Oct 28 18:43:05 EST 2003 620 who fredette 621 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 622 descr 623 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 624 this hack uses -O0 to avoid the problem. 625 kcah 626 627 hack gcc 3.3.2/installboot/ffs.c 628 cdate Tue Oct 28 18:43:05 EST 2003 629 who fredette 630 file usr.sbin/installboot/Makefile : 1.26 631 descr 632 ffs.c causes cc1 to barf for as-yet unknown reasons. this 633 hack uses -O0 to avoid the problem. 634 kcah 635 636 hack gcc 4.1.1/fsck_ffs/pass1.c 637 cdate Fri Jun 23 10:30:25 PDT 2006 638 who mrg 639 file sbin/fsck_ffs/Makefile : 1.30 640 file sbin/fsdb/Makefile : 1.19 641 file sbin/dump_lfs/Makefile : 1.9 642 file usr.sbin/ndbootd/Makefile : 1.2 643 descr 644 pass1.c causes cc1 to barf for as-yet unknown reasons. this 645 hack uses -O0 to avoid the problem. (these all seem to be the 646 same problem.) 647 kcah 648 649 650 port m68000 651 652 hack gcc 3.3.2/gcc/ra-colorize.c 653 cdate Wed Nov 5 11:03:13 EST 2003 654 who mrg 655 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 656 descr 657 ra-colorize.c causes a whole spew of unreferenced .L* local 658 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 659 Note this has been fixed in 3.3.3 at least on m68k, 660 but it hasn't been confirmed on sun2/m68000. 661 (it's too slow even on emulator and unlikely to build 662 toolchains on sun2 with its maximum 4MB RAM) 663 kcah 664 665 port sparc64 666 667 hack disable optimzations for uvm_bio.c on 32 bit kernels 668 cdate Sun Mar 21 14:14:04 MET 2004 669 who martin 670 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 671 file sys/arch/sparc64/conf/files.sparc64 : 1.93 672 descr 673 The sparc compiler miscompiles uvm_bio.c when using 674 any optimization. This results in ubc_release panics. 675 kcah 676 677 port macppc 678 679 hack remove inline from rotate_{left,right} 680 cdate Tue Feb 22 13:43:25 EST 2005 681 who christos 682 file src/dist/bind/lib/dns/rbt.c 683 descr 684 The macppc gcc-3.3 compiler miscompiles rbt.c when these 685 functions are inlined. The error is: 686 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 687 .* named[368]: exiting (due to assertion failure) 688 This is reportedly fixed in gcc-3.4 689 kcah 690 691 port hppa 692 693 hack hppa-gcc-3.3.3/grep/dfa.c 694 cdate Sun Aug 8 08:34:32 PDT 2004 695 who chs 696 file gnu/usr.bin/grep/grep/Makefile : 1.4 697 descr 698 gcc 3.3.3 generates bad code for dfa.c with -O2, 699 reduce optimization to -O1 to avoid the bug. 700 kcah 701 702 hack hppa boot-from-disk memory corruption 703 cdate Wed May 18 06:56:07 PDT 2005 704 who chs 705 file src/sys/dev/scsipi/scsipiconf.h : 1.98 706 descr 707 There is some bug with DMA on hppa that corrupts scsipi_xfer 708 structures, but it only shows up when booting from disk. 709 For now, we'll add some padding to scsipi_xfer so that 710 the corrupted memory is not otherwise used. 711 kcah 712 713 port mips 714 715 hack mips-shared-linker-load-address 716 cdate Fri Oct 7 08:33:10 UTC 2005 717 who simonb 718 file src/sys/kern/exec_elf32.c : 1.107 719 descr 720 With COMPAT_16 or previous enabled (which enables 721 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 722 load and run at address 0. The check to fix this in 723 rev 1.107 only checks the first psection of the ELF 724 executable, which may not be loadable. A more correct 725 fix is to check the first loadable psection instead of 726 just the first psection. 727 kcah 728 729 hack mips-duplicate-ras-end-label 730 cdate Sat Sep 2 23:29:42 2006 731 who martin 732 file src/regres/sys/kern/ras/ras3/Makefile : 1.3 733 descr 734 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 735 labels by duplicated __asm output from RAS_END() 736 macro. 737 kcah 738 739 port i386 740 741 hack minus-Os-broken-machdep-c 742 cdate Mon Jul 31 13:09:01 EDT 2006 743 who christos 744 file src/sys/arch/machdep.c : 1.576 745 descr 746 gcc-4 miscompiles this file with -Os and the resulting 747 kernel resets as reported in PR33725 748 kcah 749 750 hack use volatile intermediate variable to enforce rounding 751 cdate Tue Aug 1 22:15:55 MEST 2006 752 who drochner 753 file src/lib/libm/src/lrintf.c : 1.4 754 file src/lib/libm/src/s_rintf.c : 1.8 755 descr 756 gcc-4 does subsequent operations on "float" values within 757 the i387 FPU without rounding the intermediate results 758 kcah 759
Indexes created Wed Nov 05 19:10:08 GMT 2025