HACKS revision 1.118
1 # $NetBSD: HACKS,v 1.118 2011/10/27 18:46:43 christos Exp $ 2 # 3 # This file is intended to document workarounds for currently unsolved 4 # (mostly) compiler bugs. 5 # 6 # Format: 7 # hack title 8 # cdate creation date 9 # mdate mod date 10 # who responsible developer 11 # port ... 12 # affected ports, space separated, if not "all" 13 # file affected file : revision : line from : line to 14 # affected files and revision and line numbers describing hack 15 # multiple lines if necessary. 16 # pr NNNN ... 17 # problem reports this hack works around, if known. Space 18 # separated. 19 # regress src/regress/directory/where/test/found 20 # regression test directories, if available. 21 # descr 22 # insert short informal description (multi-line). (Longer ones 23 # should be in the PR database. More formal descriptions might 24 # be in the regress tree. See above). 25 # kcah 26 # closing bracket. 27 # 28 # this is a comment. 29 30 hack netstat ieee1394 address printing. 31 mdate 14 Nov 2000 32 who matt 33 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 34 descr 35 Because the current implementation of IP over IEEE1394, the 36 fw device address contains more than just the IEEE1394 EUI-64. 37 So when printing out IEEE1394 addresses, ignore the extra stuff. 38 kcah 39 40 hack xterm vs. libterm 41 mdate 01 Aug 2000 42 who jdc 43 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 44 pr 10383 45 descr 46 In order to extend the termcap string over 1023 bytes, a ZZ entry was 47 introduced to point to a memory location containing the full entry. 48 Without this hack, xterm will export a termcap containing the ZZ 49 entry, which will then be ignored by libterm. As xterm modifies the 50 exported termcap, this would cause those modifications to be ignored. 51 kcah 52 53 hack wi-at-big-endian-bus 54 cdate 15 Mar 2002 55 who martin 56 file dev/ic/wireg.h 57 descr Add an option to access the underlying bus in big endian byte order 58 to work around deficiencies in bus_space_{read,write}_* macros. 59 Those don't allow the implementation of a proper pcmcia bus space 60 tag. 61 kcah 62 63 hack specific knowledge of colours in curses code 64 cdate Sun Apr 6 11:05:24 BST 2003 65 who jdc 66 file lib/libcurses/color.c : r1.24 67 descr 68 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 69 Fix is to enhance libtermcap to understand terminfo-style % sequences. 70 See also: 71 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 72 kcah 73 74 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 75 cdate 21 Aug 2003 76 who he 77 file sys/miscfs/procfs/procfs_linux.c : 1.14 78 descr 79 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 80 literals/constants, but refer to variables of a type which is 81 not "unsigned long", causing compilation of procfs_linux.c to 82 fail with "makes integer from pointer without a cast". This 83 is observed on e.g. the sun3 port. Ideally the "types" for 84 symbols should be consistent across all ports. 85 kcah 86 87 hack gcc-strict-aliasing 88 cdate 6 August 2004 89 who junyoung 90 pr 26516 91 file src/usr.sbin/racoon/racoon/Makefile : 1.21 92 descr 93 GCC issues a warning "dereferencing type-punned pointer will break 94 strict-aliasing rules" when compiling 95 crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this 96 is due to use of type casting in a non-standard way in the code and 97 not a compiler bug. Once a new release of KAME with a proper fix 98 applied is imported this should be backed out. 99 kcah 100 101 hack gcc4 wrong uninitialized variable 102 mdate 10 May 2006 103 who mrg 104 file bin/ksh/eval.c : 1.6 105 file bin/sh/histedit.c : 1.39 106 file bin/sh/parser.c : 1.60 107 file crypto/dist/heimdal/kdc/524.c : 1.10 108 file crypto/dist/ssh/sftp.c : 1.20 109 file crypto/dist/ssh/ssh-keysign.c : 1.11 110 file dist/ipf/lib/hostname.c : 1.2 111 file dist/ipf/tools/ipmon.c : 1.8 112 file dist/ntp/ntpd/ntp_request.c : 1.4 113 file dist/ntp/ntpd/refclock_shm.c : 1.4 114 file dist/ntp/sntp/timing.c : 1.3 115 file dist/pppd/pppstats/pppstats.c : 1.3 116 file dist/smbfs/lib/smb/rap.c : 1.6 117 file dist/tcpdump/print-zephyr.c : 1.5 118 file distrib/utils/sysinst/aout2elf.c : 1.12 119 file gnu/libexec/uucp/uucico/uucico.c : 1.6 120 file lib/libc/citrus/citrus_csmapper.c : 1.6 121 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 122 file lib/libc/inet/inet_cidr_ntop.c : 1.3 123 file lib/libc/inet/inet_ntop.c : 1.3 124 file lib/libc/stdio/vfwprintf.c : 1.8 125 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 126 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 127 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 128 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 129 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 130 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 131 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 132 file sbin/fsck_ext2fs/dir.c : 1.19 133 file sbin/routed/rtquery/rtquery.c : 1.18 134 file sys/arch/amd64/amd64/pmap.c : 1.26 135 file sys/arch/i386/pci/piixpcib.c : 1.4 136 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 137 file sys/crypto/cast128/cast128.c : 1.9 138 file sys/ddb/db_command.c : 1.86 139 file sys/dev/cardbus/cardbus_map.c : 1.21 140 file sys/dev/fss.c : 1.25 141 file sys/dev/ic/igsfb.c : 1.39 142 file sys/dev/ic/mb86950.c : 1.5 143 file sys/dev/ic/midway.c : 1.71 144 file sys/dev/kttcp.c : 1.18 145 file sys/dev/rasops/rasops_bitops.h : 1.9 146 file sys/dev/pci/cmpci.c : 1.31 147 file sys/dev/pci/machfb.c : 1.45 148 file sys/dev/usb/ohci.c : 1.174 149 file sys/dev/usb/uhci.c : 1.196 150 file sys/dev/rasops/rasops_bitops.h : 1.9 151 file sys/dist/ipf/netinet/ip_nat.c : 1.10 152 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 153 file sys/dist/pf/net/pf.c : 1.22 154 file sys/fs/udf/udf_vnops.c : 1.4 155 file sys/kern/kern_sig.c : 1.219 156 file sys/kern/tty.c : 1.181 157 file sys/net/bpf.c : 1.116 158 file sys/net/zlib.c : 1.26 159 file sys/netccitt/if_x25subr.c : 1.37 160 file sys/netinet/in.c : 1.107 161 file sys/netsmb/smb_smb.c : 1.27 162 file sys/netsmb/smb_trantcp.c : 1.22 163 file sys/nfs/nfs_serv.c : 1.108 164 file sys/nfs/nfs_socket.c : 1.129 165 file sys/nfs/nfs_syscalls.c : 1.91 166 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 167 file usr.bin/ftp/ftp.c : 1.140 168 file usr.bin/find/function.c : 1.54 169 file usr.bin/mail/tty.c : 1.20 170 file usr.bin/msgc/msg_sys.def : 1.33-1.34 171 file usr.bin/nl/nl.c : 1.7 172 file usr.bin/systat/keyboard.c : 1.23 173 file usr.bin/usbhidctl/usbhid.c : 1.29 174 file usr.bin/vi/cl/cl_read.c : 1.5 175 file usr.bin/vi/ex/ex_cscope.c : 1.12 176 file usr.bin/vi/ex/ex_tag.c : 1.19 177 file usr.bin/vi/vi/v_txt.c : 1.15 178 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 179 file usr.sbin/cron/do_command.c : 1.19 180 file usr.sbin/timed/timed/slave.c : 1.15 181 descr 182 GCC 4.1 gets many uninitialised variable warnings wrong. We should 183 really audit all the old hacks like this when older compilers are 184 removed from the tree, as many are probably no longer required. 185 The problem is that it does not recognize initialization via function 186 call pointer. I.e. 187 int p; 188 foo(&p); 189 does not mark p as initialized. 190 kcah 191 192 hack gcc4 pointer sign and strict aliasing problems 193 mdate 10 May 2006 194 who mrg 195 file bin/ed/Makefile : 1.33 196 file distrib/utils/sysinst/Makefile.inc : 1.44 197 file distrib/utils/x_dhclient/Makefile : 1.15 198 file games/bcd/Makefile : 1.5 199 file games/dab/Makefile : 1.5 200 file games/larn/Makefile : 1.17 201 file games/pom/Makefile : 1.5 202 file lib/libasn1/Makefile : 1.26 203 file lib/libcrypt/Makefile : 1.17 204 file lib/libgssapi/Makefile : 1.16 205 file lib/libhdb/Makefile : 1.20 206 file lib/libkadm5clnt/Makefile : 1.21 207 file lib/libkadm5srv/Makefile : 1.25 208 file lib/libkrb5/Makefile : 1.35 209 file lib/libssh/Makefile : 1.6 210 file lib/libtelnet/Makefile : 1.26 211 file libexec/getty/Makefile : 1.14 212 file libexec/kadmind/Makefile : 1.19 213 file libexec/kpasswdd/Makefile : 1.14 214 file sbin/atactl/Makefile : 1.3 215 file sbin/cgdconfig/Makefile : 1.7 216 file sbin/clri/Makefile : 1.13 217 file sbin/dkctl/Makefile : 1.4 218 file sbin/dump/Makefile : 1.33 219 file sbin/fdisk/Makefile : 1.35 220 file sbin/fsck_ext2fs/Makefile : 1.11 221 file sbin/fsck_ffs/Makefile : 1.29 222 file sbin/fsdb/Makefile : 1.18 223 file sbin/mount_smbfs/Makefile : 1.4 224 file sbin/newfs/Makefile : 1.30 225 file sbin/newfs_sysvbfs/Makefile : 1.2 226 file sbin/restore/Makefile : 1.23 227 file sbin/veriexecctl/Makefile : 1.11 228 file sys/lib/libsa/Makefile : 1.59 229 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 230 file usr.bin/awk/Makefile : 1.9 231 file usr.bin/crontab/Makefile : 1.24 232 file usr.bin/ctags/Makefile : 1.8 233 file usr.bin/gzip/Makefile : 1.10 234 file usr.bin/ssh/sftp/Makefile : 1.10 235 file usr.bin/ssh/ssh/Makefile : 1.25 236 file usr.bin/vi/build/Makefile : 1.26 237 file usr.bin/telnet/Makefile : 1.40 238 file usr.bin/tn3270/tn3270/Makefile : 1.36 239 file usr.bin/tr/Makefile : 1.4 240 file usr.sbin/amd/amd/Makefile : 1.27 241 file usr.sbin/amd/amq/Makefile : 1.14 242 file usr.sbin/amd/libamu/Makefile : 1.20 243 file usr.sbin/amd/pawd/Makefile : 1.5 244 file usr.sbin/bind/Makefile.inc : 1.22 245 file usr.sbin/bind/libdns/Makefile : 1.3 246 file usr.sbin/bind/named/Makefile : 1.17 247 file usr.sbin/bootp/bootptest/Makefile : 1.2 248 file usr.sbin/chrtbl/Makefile : 1.6 249 file usr.sbin/cron/Makefile : 1.12 250 file usr.sbin/dhcp/Makefile.inc : 1.20 251 file usr.sbin/dumplfs/Makefile : 1.11 252 file usr.sbin/hprop/Makefile : 1.13 253 file usr.sbin/installboot/Makefile : 1.35 254 file usr.sbin/ipf/ipftest/Makefile : 1.32 255 file usr.sbin/isdn/isdnd/Makefile : 1.6 256 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 257 file usr.sbin/isdn/isdntel/Makefile : 1.2 258 file usr.sbin/isdn/isdntrace/Makefile : 126 259 file usr.sbin/mopd/common/Makefile : 1.10 260 file usr.sbin/mopd/mopd/Makefile : 1.9 261 file usr.sbin/mopd/mopprobe/Makefile : 1.7 262 file usr.sbin/makefs/Makefile : 1.17 263 file usr.sbin/mscdlabel/Makefile : 1.5 264 file usr.sbin/pkg_install/add/Makefile : 1.7 265 file usr.sbin/pkg_install/create/Makefile : 1.5 266 file usr.sbin/pkg_install/lib/Makefile : 1.28 267 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 268 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 269 file usr.sbin/pppd/Makefile.inc : 1.3 270 file usr.sbin/pppd/pppd/Makefile : 1.38 271 file usr.sbin/rarpd/Makefile : 1.10 272 file usr.sbin/rbootd/Makefile : 1.10 273 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 274 file usr.sbin/rtadvd/Makefile : 1.9 275 file usr.sbin/tcpdump/Makefile : 1.42 276 file usr.sbin/wiconfig/Makefile : 1.3 277 descr 278 GCC 4.1 warns on pointer sign comparision/assignments and lots of 279 code does not conform. For now we use -Wno-pointer-sign and 280 -fno-strict-aliasing. 281 kcah 282 283 hack cross-building hack on Darwin 284 mdate 20 July 2008 285 who agc 286 file src/distrib/common/Makefile.mdset : 1.33 287 descr 288 Darwin has problems with getopt() when used in mdsetimage -v, 289 due to the difference between BSD and libiberty() getopt 290 implementations, more fully described in 291 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 292 and the subsequent thread. For just now, we just have an ugly 293 workaround not to call mdsetimage with the -v argument on Darwin 294 kcah 295 296 hack avoid rebuilding asn1 libraries 297 mdate 03 August 2008 298 who veego 299 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 300 file src/lib/libasn1/Makefile : 1.32 301 file src/lib/libhdb/Makefile : 1.23 302 file src/lib/libgssapi/Makefile : 1.20 303 file src/lib/libhx509/Makefile : 1.3 304 pr 9702 39185 305 descr 306 asn1_compile does not check if generated header files do not have to 307 be rebuild. 308 Generate .hx files and copy it in the Makefiles if they changed. 309 kcah 310 311 hack avoid gcc4 -O1 bug in loop optimize 312 cdate 29 November 2008 313 who tsutsui 314 file src/sbin/ifconfig/Makefile : 1.39 315 pr 40036 40066 316 descr 317 gcc -O1 seems to generate wrong code in loop optimize so that 318 ifconfig lo0 inet6 doesn't return error even if a kernel 319 doesn't have IPv6 support. (see the above PRs for details) 320 For workaround, specify -fno-loop-optimize on m68000, 321 which uses -O1 by default. 322 kcah 323 324 hack MKPIE ldscript for /usr.sbin/crash 325 cdate 22 April 2010 326 who christos 327 file src/usr.sbin/crash/Makefile : 1.5 328 file src/usr.sbin/crash/ldscript.crash : 1.1 329 pr N/A 330 descr 331 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 332 sections 333 kcah 334 335 port vax 336 337 hack gcc4/vax ICE 338 cdate 339 who tsutsui 340 file sys/arch/vax/conf/Makefile.vax 341 descr 342 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 343 -fno-tree-ter prevents it so add it to COPTS. 344 kcah 345 346 hack gcc4/vax compiler crash 347 cdate Fri Jun 30 22:39:12 PDT 2006 348 who mrg 349 file bin/csh/Makefile : 1.27 350 file lib/i18n_module/UTF7/Makefile : 1.2 351 descr 352 GCC4 on vax crashes. -O0 stops it happening so far... 353 kcah 354 355 hack gcc 2.95/vax doesn't like abort being used as function pointer 356 cdate Tue Dec 13 05:54:50 GMT 2005 357 who jmc 358 file lib/libc/rpc/svc_vc.c 1.15 359 descr 360 Provide a local definition for abort which doesn't include 361 the noreturn attribute which trips up gcc 2.95 on vax. 362 kcah 363 364 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 365 cdate Mon May 9 12:16:22 CDT 2005 366 who jmc 367 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 368 gnu/usr.bin/gettext/libgrep/Makefile 1.3 369 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 370 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 371 descr 372 The latest gettext assumes a C99 environment or at least 373 configure checks to work around this. As we don't use configure 374 provide a stdbool.h for vax builds locally in directories from 375 the template provided by the gettext code. 376 kcah 377 378 hack gcc 2.95/vax cannot handle __builtin_ffs() 379 cdate Fri Aug 23 21:31:15 CEST 2002 380 who ragge 381 file sys/lib/libkern/libkern.h : 1.42 382 descr 383 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 384 added this feature to GCC 3 so it can be removed when switching. 385 kcah 386 387 hack gcc 2.95/vax libbz2 388 mdate 27 Jun 2002 389 who thorpej 390 file lib/libbz2/Makefile 391 descr 392 libbz2 is mis-compiled with optimization with GCC 2.95.3 393 on VAX. -O0 works around this problem. 394 kcah 395 396 hack vax Toolchain bug 397 cdate 28 Mar 2003 398 who he 399 file sys/arch/vax/vax/intvec.S : 1.5 400 descr 401 Workaround for PR toolchain/20924. The assembler apparently 402 tries to range-check byte offsets when it doesn't have 403 sufficient information to make that decision. 404 Workaround uses `brw' instead of `brb' instruction. 405 kcah 406 407 hack vax gcc 2.95.3 -Wuninitialized workarounds 408 cdate 6 Nov 2003 409 who he 410 file sys/dev/bi/if_ni.c : 1.22 411 file sys/arch/vax/vax/ctu.c : 1.20 412 descr 413 Workaround for gcc 2.95.3 failing to detect that certain 414 variables will be initialized; so that this code compiles 415 with -Wuninitialized. Should be reviewed and possibly 416 reverted when gcc 3.3.2 is ready for vax. 417 kcah 418 419 hack vax gcc 2.95.3 structure initialization 420 cdat 13 May 2004 421 who cl 422 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 423 descr 424 Workaround for gcc 2.95.3 failing to initialize structures 425 and/or unions inside structures using nested designators. 426 Should be reverted when gcc >=3.3.3 is ready for vax. 427 kcah 428 429 hack vax gcc 2.95.3 needs -I. to build nslexer.c 430 cdat 6 Jun 2004 431 who mhitch 432 file lib/libc/arch/vax/Makefile.inc : 1.6 433 descr 434 It appears necessary to add -I. to CPPFLAGS when building 435 nslesxer.c. This may be caused by gcc 2.95.3 being used. 436 Should be reverted when a newer gcc is ready for vax. 437 kcah 438 439 hack vax gcc 2.95.3 doesn't understand "-std=c99" 440 cdat 5 April 2005 441 who tron 442 file src/share/mk/bsd.sys.mk 443 descr 444 We cannot use "-std=c99" for compiler warning level 4 and above 445 because gcc 2.95.3 doesn't support that option. 446 kcah 447 448 hack declare boolean_t in two IPF user-mode programs 449 cdate Tue Mar 7 19:19:20 CET 2006 450 who he 451 file dist/ipf/ipsend/iptests.c : 1.8 452 dist/ipf/ipsend/sock.c : 1.7 453 descr 454 The IPF user-mode programs ipsend and iptest first 455 include <sys/types.h> without _KERNEL defined, and 456 later include <sys/file.h> with _KERNEL defined. 457 This causes a build failure when building for vax, 458 since <sys/device.h> ends up being included without 459 bollean_t being defined by <sys/types.h>. 460 Build failure and further details documented in 461 PR#32907. 462 kcah 463 464 hack pcc 0.9.9 large string literals 465 cdat 8 July 2008 466 who gmcgarry 467 file sys/conf/param.c : 1.58 468 descr 469 Workaround for pcc 0.9.9 not handling large string literals 470 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 471 fail compilation. 472 There is a proposal on the pcc mailing list to stuff config 473 file in ELF section. 474 kcah 475 476 hack xorg warnings 477 cdat 30 July 2008 478 who mrg 479 file external/mit/xorg/lib/libSM/Makefile : 1.2 480 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.2 481 external/mit/xorg/lib/libXext/Makefile : 1.2 482 external/mit/xorg/lib/libXfont/Makefile : 1.2 483 descr 484 Disable several warnings or use -Wno-error across Xorg sources 485 while we get them working 486 kcah 487 488 hack 32 bit time leftovers 489 cdat 11 January 2009 490 who christos 491 file lib/libc/time/localtime.c : 1.41 492 lib/libc/time/zic.c : 1.23 493 descr 494 The timezone compiled files still contain 32 bit time_t 495 quantities. I did not want to version the files because 496 the ``parser'' is too ugly for words. What needs to be 497 done, is to rewrite the parser from scratch also to avoid 498 potential core-dumps from parsing invalid files. 499 kcah 500 501 hack 32 bit time leftovers 502 cdat 11 January 2009 503 who christos 504 file various 505 descr 506 Many filesystem on-disk formats have 32 bit times. 507 kcah 508 509 port arm 510 511 hack gcc-unsigned-compare 512 cdate 09 Mar 2002 513 mdate 18 Mar 2002 514 who bjh21 515 file dist/bind/lib/nameser/ns_parse.c : 1.3 516 file dist/dhcp/minires/ns_parse.c : 1.3 517 file dist/dhcp/omapip/result.c : 1.2 518 file dist/dhcp/server/failover.c : 1.3 519 file gnu/dist/toolchain/bfd/bfd.c : 1.2 520 file gnu/dist/toolchain/bfd/format.c : 1.2 521 file gnu/dist/toolchain/gdb/target.c : 1.2 522 file sys/kern/vfs_subr.c : 1.172 523 descr When checking that a potentially-unsigned enum is >= 0, assign 524 it to an int first. This is necessary to avoid "comparison is 525 always true" warnings with -fshort-enums. Casting to an int 526 really should be enough, but turns out not to be. 527 kcah 528 529 530 port sh3 531 532 hack gcc4-sh3-bz2 533 cdate Sun May 21 03:34:57 UTC 2006 534 mdate Fri May 16 13:13:00 UTC 2008 535 who mrg, tsutsui 536 file lib/libbz2/Makefile : 1.10 537 descr 538 The in-tree GCC 4.1-based compiler generated too-far 539 pc-relative addresses. Hack is to build with 540 -fno-loop-optimize. 541 kcah 542 543 544 port m68000 545 546 hack gcc4-m68000 547 cdate Fri Feb 8 10:29:37 PST 2008 548 mdate Sun May 4 15:37:19 UTC 2008 549 who mrg, tsutsui 550 file rescue/Makefile : 1.21 551 file sbin/dump_lfs/Makefile : 1.9 552 file sbin/fsck_ffs/Makefile : 1.35 553 file sbin/fsdb/Makefile : 1.22 554 file share/mk/sys.mk : 1.96 555 file usr.sbin/ndbootd/Makefile : 1.5 556 descr 557 Several internal compiler errors with gcc -O1 558 around 64bit integer arithmetic. 559 This hack uses -O1 and adds some -fno-tree-foo options 560 to avoid the problem. 561 This might be related with GCC Bugzilla Bug 32424. 562 kcah 563 564 565 port sparc 566 567 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 568 cdate Sun Aug 14 19:26:48 PDT 2011 569 who mrg 570 file sys/arch/sparc64/sparc/cpu.c : 1.234 571 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 572 file sys/arch/sparc64/sparc/genassym.cf : 1.67 573 file sys/arch/sparc64/sparc/locore.s : 1.265 574 descr 575 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 576 Post newlock2 there was a bug where a lock was reduced from 577 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 578 would crash due to NULL IPI. This was fixed by re-using the 579 right IPL value. However, GCC 4.5.3 build kernels have the 580 same problems. For now, the hack is re-instated. 581 kcah 582 583 584 port sparc64 585 586 hack disable optimzations for uvm_bio.c on 32 bit kernels 587 cdate Sun Mar 21 14:14:04 MET 2004 588 who martin 589 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 590 file sys/arch/sparc64/conf/files.sparc64 : 1.93 591 descr 592 The sparc compiler miscompiles uvm_bio.c when using 593 any optimization. This results in ubc_release panics. 594 kcah 595 596 597 port mips 598 599 hack mips-shared-linker-load-address 600 cdate Fri Oct 7 08:33:10 UTC 2005 601 who simonb 602 file src/sys/kern/exec_elf32.c : 1.107 603 descr 604 With COMPAT_16 or previous enabled (which enables 605 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 606 load and run at address 0. The check to fix this in 607 rev 1.107 only checks the first psection of the ELF 608 executable, which may not be loadable. A more correct 609 fix is to check the first loadable psection instead of 610 just the first psection. 611 kcah 612 613 hack mips-duplicate-ras-end-label 614 cdate Sat Sep 2 23:29:42 2006 615 who martin 616 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 617 descr 618 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 619 labels by duplicated __asm output from RAS_END() 620 macro. 621 kcah 622 623 hack mips-mcount-assembler-warning 624 cdate Tue Jul 29 14:16:52 UTC 2008 625 who lukem 626 file src/lib/libc/gmon/Makefile.inc : 1.8 627 descr 628 Workaround for PR port-mips/39192. 629 common/lib/libc/gmon/mcount.c generates a (fatal) 630 assembler warning on MIPS: 631 Warning: No .cprestore pseudo-op used in PIC code 632 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 633 kcah 634 635 port i386 636 637 hack use volatile intermediate variable to enforce rounding 638 cdate Tue Aug 1 22:15:55 MEST 2006 639 who drochner 640 file src/lib/libm/src/lrintf.c : 1.4 641 file src/lib/libm/src/s_rintf.c : 1.8 642 descr 643 gcc-4 does subsequent operations on "float" values within 644 the i387 FPU without rounding the intermediate results 645 kcah 646 647 port powerpc 648 649 hack avoid using __builtin_return_address(0) because it fails in 650 Xorg's module loader 651 cdate Sat Sep 27 03:52:05 UTC 2008 652 who macallan 653 file src/libexec/ld.elf_so/rtld.c : 1.121 654 descr 655 workaround for PR port-macppc/37812 656 kcah 657 658 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 659 building the native compiler via build.sh those don't defined 660 properly. 661 cdate Sat Mar 12 08:00:00 UTC 2011 662 who matt 663 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 664 descr 665 see above 666 kcah 667 668 port powerpc64 669 670 hack include _errno.c in libposix so that __errno resolves. It 671 should resolve from libc's errno, but somehow it does not. 672 Linker bug? 673 cdate Thu Oct 27 13:19:47 EDT 2011 674 who christos 675 file src/lib/libposix/Makefile: 1.15 676 file src/lib/librt/Makefile: 1.14 677 descr 678 workaround for: 679 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 680 R_PPC64_REL24 relocation against symbol `.__errno' 681 kcah 682
Indexes created Wed Nov 05 21:10:10 GMT 2025