HACKS revision 1.87
1 # $NetBSD: HACKS,v 1.87 2006/10/27 22:31:21 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 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 vax Toolchain bug 371 cdate 28 Mar 2003 372 who he 373 file sys/arch/vax/vax/intvec.S : 1.5 374 descr 375 Workaround for PR toolchain/20924. The assembler apparently 376 tries to range-check byte offsets when it doesn't have 377 sufficient information to make that decision. 378 Workaround uses `brw' instead of `brb' instruction. 379 kcah 380 381 hack vax gcc 2.95.3 -Wuninitialized workarounds 382 cdate 6 Nov 2003 383 who he 384 file sys/dev/bi/if_ni.c : 1.22 385 file sys/arch/vax/vax/ctu.c : 1.20 386 descr 387 Workaround for gcc 2.95.3 failing to detect that certain 388 variables will be initialized; so that this code compiles 389 with -Wuninitialized. Should be reviewed and possibly 390 reverted when gcc 3.3.2 is ready for vax. 391 kcah 392 393 hack vax gcc 2.95.3 structure initialization 394 cdat 13 May 2004 395 who cl 396 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 397 descr 398 Workaround for gcc 2.95.3 failing to initialize structures 399 and/or unions inside structures using nested designators. 400 Should be reverted when gcc >=3.3.3 is ready for vax. 401 kcah 402 403 hack vax gcc 2.95.3 needs -I. to build nslexer.c 404 cdat 6 Jun 2004 405 who mhitch 406 file lib/libc/arch/vax/Makefile.inc : 1.6 407 descr 408 It appears necessary to add -I. to CPPFLAGS when building 409 nslesxer.c. This may be caused by gcc 2.95.3 being used. 410 Should be reverted when a newer gcc is ready for vax. 411 kcah 412 413 hack vax gcc 2.95.3 doesn't understand "-std=c99" 414 cdat 5 April 2005 415 who tron 416 file src/share/mk/bsd.sys.mk 417 descr 418 We cannot use "-std=c99" for compiler warning level 4 and above 419 because gcc 2.95.3 doesn't support that option. 420 kcah 421 422 hack declare boolean_t in two IPF user-mode programs 423 cdate Tue Mar 7 19:19:20 CET 2006 424 who he 425 file dist/ipf/ipsend/iptests.c : 1.8 426 dist/ipf/ipsend/sock.c : 1.7 427 descr 428 The IPF user-mode programs ipsend and iptest first 429 include <sys/types.h> without _KERNEL defined, and 430 later include <sys/file.h> with _KERNEL defined. 431 This causes a build failure when building for vax, 432 since <sys/device.h> ends up being included without 433 bollean_t being defined by <sys/types.h>. 434 Build failure and further details documented in 435 PR#32907. 436 kcah 437 438 port arm 439 440 hack gcc-unsigned-compare 441 cdate 09 Mar 2002 442 mdate 18 Mar 2002 443 who bjh21 444 file dist/bind/lib/nameser/ns_parse.c : 1.3 445 file dist/dhcp/minires/ns_parse.c : 1.3 446 file dist/dhcp/omapip/result.c : 1.2 447 file dist/dhcp/server/failover.c : 1.3 448 file gnu/dist/toolchain/bfd/bfd.c : 1.2 449 file gnu/dist/toolchain/bfd/format.c : 1.2 450 file gnu/dist/toolchain/gdb/target.c : 1.2 451 file sys/kern/vfs_subr.c : 1.172 452 descr When checking that a potentially-unsigned enum is >= 0, assign 453 it to an int first. This is necessary to avoid "comparison is 454 always true" warnings with -fshort-enums. Casting to an int 455 really should be enough, but turns out not to be. 456 kcah 457 458 hack gcc 3.3.2/arm sys/kern/uipc_socket.c 459 cdate Tue Oct 28 18:02:16 GMT 2003 460 who skrll 461 pr 23044 462 file sys/arch/arm/conf/Makefile.arm : 1.19 463 descr 464 Performing a build.sh tools on a CATS with NFS mounted 465 obj and src directories results in "panic: receive 1" 466 The hack is to compile sys/kern/uipc_socket.c with 467 -fno-strict-aliasing 468 kcah 469 470 471 port pc532 472 473 hack egcs-pc532-ip6_mroute 474 cdate 09 Jul 2002 475 who simonb 476 file sys/arch/pc532/conf/Makefile.pc532 : 1.70 477 file sys/arch/pc532/conf/files.pc532 : 1.47 478 descr 479 egcs 1.1.2 gets an "internal error--insn does not satisfy its 480 constraints" error compiling ip6_mroute.c with -O2 or greater. 481 -O1 works around this problem. 482 kcah 483 484 hack gcc-pc532-duffs_device 485 cdate Mon Oct 27 07:23:05 UTC 2003 486 who simonb 487 file sys/arch/pc532/conf/Makefile.pc532 : 1.71 488 file sys/arch/pc532/conf/files.pc532 : 1.52 489 pr GCC PR optimization/5230 490 descr 491 gcc incorrectly gives an "unreachable code at beginning of 492 switch statement" for a Duff's device construct in 493 arch/pc532/dev/ncr.c. There is no way to disable just this 494 warning, so -Wno-error is turned on for this file. 495 kcah 496 497 hack gcc332-cppmacro-ice 498 cdate Sun Dec 7 12:48:33 UTC 2003 499 who simonb 500 file gnu/usr.bin/gcc3/libcpp/Makefile : 1.2 501 descr 502 gcc 3.3.2 gets an ICE when compiling cppmacro.c with -O2. 503 The hack is to use -O1 for this file. Fixed in gcc 504 -current mainline, unable to work out where the fix is 505 right now. 506 kcah 507 508 509 port sh3 510 511 hack gcc4-sh3-bz2 512 mdate 20 May 2006 513 who mrg 514 file lib/libbz2/Makefile : 1.10 515 descr 516 The in-tree GCC 4.1-based compiler generated too-far 517 pc-relative addresses. Hack is to build with -O0. 518 kcah 519 520 521 port sh5 522 523 hack SuperH SH5 Toolchain Bugs 524 cdate 11 Jul 2002 525 who scw 526 file usr.sbin/ndbootd/ndbootd.c : 1.6 527 file usr.sbin/traceroute/traceroute.c : 1.48 528 descr 529 The SuperH SH5 toolchain (2.97-sh5-010522) gets an internal 530 compiler error when assigning a bit-wise inverted value 531 under some circumstances. 532 Work around it by splitting the statement into two. 533 kcah 534 535 hack SuperH SH5 Toolchain Bugs 536 cdate 17 May 2003 537 who scw 538 file lib/libpthread/pthread_lock.c : 1.7 539 descr 540 The SuperH SH5 toolchain generates incorrect PIC code when 541 faced with a symbol which is declared extern, but has local 542 scope due to being defined within an asm() statement (without 543 being declared .globl in that statement). Work around it by 544 adding the .globl. 545 kcah 546 547 hack gcc 3.3.2 on sh5 - ICE compiling reload1.c at -O2 548 cdate Sun Dec 7 19:44:05 GMT 2003 549 who scw 550 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 551 descr 552 Gcc3 for sh5 gets an ICE compiling reload1.c at -O2. 553 Drop to -O1 for now when building for sh5. 554 kcah 555 556 hack gcc 3.3.2 on sh5 - ICE compiling elf32.c/elf64.c at -O2 557 cdate Sun Dec 7 21:10:46 GMT 2003 558 who scw 559 file gnu/lib/libbfd/Makefile : 1.39 560 descr 561 Gcc3 for sh5 gets an ICE compiling libbfd's elf32.c 562 and elf64.c at -O2. 563 Drop to -O1 for now when building for sh5. 564 kcah 565 566 567 hack gcc 3.3.2 on sh5 - fatal warning compiling function.c 568 cdate Sun Dec 7 19:44:05 GMT 2003 569 who scw 570 file gnu/usr.bin/gcc3/backend/Makefile : 1.13 571 descr 572 Gcc3 for sh5 issues a warning: 573 .../gnu/dist/gcc/gcc/function.c:4742: warning: `and' of 574 mutually exclusive equal-tests is always 0. 575 This causes the build to fail because of -Werror. 576 Work-around by defining NOGCCERROR when building for sh5. 577 kcah 578 579 hack gcc 3.3.3 on sh5 - ICE compiling rbtdb.c and rbtdb64.c 580 cdate Thu Nov 11 00:35:33 UTC 2004 581 who he 582 file usr.sbin/bind/libdns/Makefile/1.2 583 descr 584 Gcc3 for sh5 gets an ICE compiling these files at -O2. 585 Drop to -O1 for now when building for sh5. 586 kcah 587 588 hack gcc 3.3.3 nb3 on sh5 - ICE compiling bsd-comp.c 589 cdate Thu May 25 23:05:20 UTC 2005 590 who he 591 file sys/lkm/net/bsdcomp/Makefile : 1.3 592 descr 593 Gcc3 for sh5 gets an ICE compiling this at -O2, 594 "could not split insn". Drop to -O1 for sh5. 595 kcah 596 597 hack gcc 3.3.3 nb3 on sh5 - ICE compiling strtod.c 598 cdate Tue Jan 31 10:51:52 GMT 2006 599 who scw 600 file lib/libc/gdtoa/Makefile.inc : 1.2 601 descr 602 Gcc3 for sh5 gets an ICE compiling this at -O2, 603 "could not split insn". Drop to -O1 for sh5. 604 kcah 605 606 port sun2 607 608 hack gcc 3.3.2/mdsetimage 609 cdate Tue Oct 28 18:43:05 EST 2003 610 who fredette 611 file gnu/usr.sbin/mdsetimage/Makefile : 1.15 612 descr 613 mdsetimage.c causes cc1 to barf for as-yet unknown reasons. 614 this hack uses -O0 to avoid the problem. 615 kcah 616 617 hack gcc 3.3.2/installboot/ffs.c 618 cdate Tue Oct 28 18:43:05 EST 2003 619 who fredette 620 file usr.sbin/installboot/Makefile : 1.26 621 descr 622 ffs.c causes cc1 to barf for as-yet unknown reasons. this 623 hack uses -O0 to avoid the problem. 624 kcah 625 626 hack gcc 4.1.1/fsck_ffs/pass1.c 627 cdate Fri Jun 23 10:30:25 PDT 2006 628 who mrg 629 file sbin/fsck_ffs/Makefile : 1.30 630 file sbin/fsdb/Makefile : 1.19 631 file sbin/dump_lfs/Makefile : 1.9 632 file usr.sbin/ndbootd/Makefile : 1.2 633 descr 634 pass1.c causes cc1 to barf for as-yet unknown reasons. this 635 hack uses -O0 to avoid the problem. (these all seem to be the 636 same problem.) 637 kcah 638 639 640 port m68000 641 642 hack gcc 3.3.2/gcc/ra-colorize.c 643 cdate Wed Nov 5 11:03:13 EST 2003 644 who mrg 645 file gnu/usr.bin/gcc3/backend/Makefile : 1.11 646 descr 647 ra-colorize.c causes a whole spew of unreferenced .L* local 648 symbols. using -O0 (or even -O2 reportedly) avoids the problem. 649 Note this has been fixed in 3.3.3 at least on m68k, 650 but it hasn't been confirmed on sun2/m68000. 651 (it's too slow even on emulator and unlikely to build 652 toolchains on sun2 with its maximum 4MB RAM) 653 kcah 654 655 port sparc64 656 657 hack disable optimzations for uvm_bio.c on 32 bit kernels 658 cdate Sun Mar 21 14:14:04 MET 2004 659 who martin 660 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 661 file sys/arch/sparc64/conf/files.sparc64 : 1.93 662 descr 663 The sparc compiler miscompiles uvm_bio.c when using 664 any optimization. This results in ubc_release panics. 665 kcah 666 667 port macppc 668 669 hack remove inline from rotate_{left,right} 670 cdate Tue Feb 22 13:43:25 EST 2005 671 who christos 672 file src/dist/bind/lib/dns/rbt.c 673 descr 674 The macppc gcc-3.3 compiler miscompiles rbt.c when these 675 functions are inlined. The error is: 676 .* named[368]: rbt.c:1584: INSIST(child != (void *)0) >failed 677 .* named[368]: exiting (due to assertion failure) 678 This is reportedly fixed in gcc-3.4 679 kcah 680 681 port hppa 682 683 hack hppa-gcc-3.3.3/grep/dfa.c 684 cdate Sun Aug 8 08:34:32 PDT 2004 685 who chs 686 file gnu/usr.bin/grep/grep/Makefile : 1.4 687 descr 688 gcc 3.3.3 generates bad code for dfa.c with -O2, 689 reduce optimization to -O1 to avoid the bug. 690 kcah 691 692 hack hppa boot-from-disk memory corruption 693 cdate Wed May 18 06:56:07 PDT 2005 694 who chs 695 file src/sys/dev/scsipi/scsipiconf.h : 1.98 696 descr 697 There is some bug with DMA on hppa that corrupts scsipi_xfer 698 structures, but it only shows up when booting from disk. 699 For now, we'll add some padding to scsipi_xfer so that 700 the corrupted memory is not otherwise used. 701 kcah 702 703 port mips 704 705 hack mips-shared-linker-load-address 706 cdate Fri Oct 7 08:33:10 UTC 2005 707 who simonb 708 file src/sys/kern/exec_elf32.c : 1.107 709 descr 710 With COMPAT_16 or previous enabled (which enables 711 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 712 load and run at address 0. The check to fix this in 713 rev 1.107 only checks the first psection of the ELF 714 executable, which may not be loadable. A more correct 715 fix is to check the first loadable psection instead of 716 just the first psection. 717 kcah 718 719 hack mips-duplicate-ras-end-label 720 cdate Sat Sep 2 23:29:42 2006 721 who martin 722 file src/regres/sys/kern/ras/ras3/Makefile : 1.3 723 descr 724 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 725 labels by duplicated __asm output from RAS_END() 726 macro. 727 kcah 728 729 port i386 730 731 hack minus-Os-broken-machdep-c 732 cdate Mon Jul 31 13:09:01 EDT 2006 733 who christos 734 file src/sys/arch/machdep.c : 1.576 735 descr 736 gcc-4 miscompiles this file with -Os and the resulting 737 kernel resets as reported in PR33725 738 kcah 739 740 hack use volatile intermediate variable to enforce rounding 741 cdate Tue Aug 1 22:15:55 MEST 2006 742 who drochner 743 file src/lib/libm/src/lrintf.c : 1.4 744 file src/lib/libm/src/s_rintf.c : 1.8 745 descr 746 gcc-4 does subsequent operations on "float" values within 747 the i387 FPU without rounding the intermediate results 748 kcah 749
Indexes created Wed Nov 05 21:10:10 GMT 2025