HACKS revision 1.164
1 # $NetBSD: HACKS,v 1.164 2016/01/12 23:03:33 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 disable ctf for gcc-4.8 build 284 mdate April 3 2014 285 who christos 286 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 287 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 288 descr 289 nbctfconvert -g -L VERSION -g fold-const.o 290 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 291 ((null)) <13532> 292 kcak 293 294 hack emacs aborting on exit (libgcc issue) 295 mdate 7 November 2011 296 who christos 297 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 298 descr 299 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 300 to do just that. If the symbol requested is not found, then it aborts. 301 emacs 23.3 triggers this assertion. For now disable aborting, and 302 silently ignore. 303 kcah 304 305 hack cross-building hack on Darwin 306 mdate 20 July 2008 307 who agc 308 file src/distrib/common/Makefile.mdset : 1.33 309 descr 310 Darwin has problems with getopt() when used in mdsetimage -v, 311 due to the difference between BSD and libiberty() getopt 312 implementations, more fully described in 313 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 314 and the subsequent thread. For just now, we just have an ugly 315 workaround not to call mdsetimage with the -v argument on Darwin 316 kcah 317 318 hack avoid rebuilding asn1 libraries 319 mdate 03 August 2008 320 who veego 321 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 322 file src/lib/libasn1/Makefile : 1.32 323 file src/lib/libhdb/Makefile : 1.23 324 file src/lib/libgssapi/Makefile : 1.20 325 file src/lib/libhx509/Makefile : 1.3 326 pr 9702 39185 327 descr 328 asn1_compile does not check if generated header files do not have to 329 be rebuild. 330 Generate .hx files and copy it in the Makefiles if they changed. 331 kcah 332 333 hack avoid gcc4 -O1 bug in loop optimize 334 cdate 29 November 2008 335 who tsutsui 336 file src/sbin/ifconfig/Makefile : 1.39 337 pr 40036 40066 338 descr 339 gcc -O1 seems to generate wrong code in loop optimize so that 340 ifconfig lo0 inet6 doesn't return error even if a kernel 341 doesn't have IPv6 support. (see the above PRs for details) 342 For workaround, specify -fno-loop-optimize on m68000, 343 which uses -O1 by default. 344 kcah 345 346 hack MKPIE ldscript for /usr.sbin/crash 347 cdate 22 April 2010 348 who christos 349 file src/usr.sbin/crash/Makefile : 1.5 350 file src/usr.sbin/crash/ldscript.crash : 1.1 351 pr N/A 352 descr 353 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 354 sections 355 kcah 356 357 hack Disable fortification for /usr/bin/makeinfo 358 cdata 24 Mar 2014 359 who tron 360 file src/gnu/usr.bin/texinfo/makeinfo/Makefile : 1.8 361 pr N/A 362 descr 363 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 364 it fails to process certain texinfo files, e.g. "cl.texi" 365 included in the Emacs 24.3 distribution. 366 kcah 367 368 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 369 cdata 05 Apr 2014 370 who tron 371 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 372 pr N/A 373 descr 374 If "xauth" is compile with "USE_SSP" set to "yes" it fails 375 mysteriously with an error message like this: 376 377 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 378 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 379 380 The compiler seems to get confused about the two filename variables 381 used in the link(2) system call. 382 kcah 383 384 hack g++ 5.x barfs on volatile in constexpr initializers 385 cdata 27 Aug 2015 386 who pooka 387 file src/lib/libpthread/pthread_types.h : 1.17 388 pr lib/49989 389 descr 390 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 391 in C++ results in: 392 error: temporary of non-literal type '__pthread_mutex_st' 393 in a constant expression 394 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 395 [...] 396 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 397 not literal because: 398 struct __pthread_mutex_st { 399 ^ 400 include/pthread_types.h:103:17: note: non-static data 401 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 402 pthread_spin_t ptm_errorcheck; 403 kcah 404 405 hack libm cabs{,f,l} and g++ 406 cdata 11 Jan 2016 407 who christos 408 pr lib/50646 409 file src/external/gpl3/gcc.old/dist/libstdc++-v3/include/std/complex : 1.2 410 file src/external/gpl3/gcc/dist/libstdc++-v3/include/std/complex : 1.2 411 descr 412 Our cabs and cabsf have a different argument format on some architectures 413 and for that we have created in libm/compat_cabs{,f}.c. The standard 414 versions in libc are __c99_cabs{,f,l} and there are __RENAME()'s in 415 <complex.h>. G++ uses __builtin_cabs{,f,l} to implement those and they 416 translate by default to cabs{,f,l} which gets defined to cabs{,f} (the 417 wrong function) and an undefined cabsl. I've changed <complex> to use 418 the __c99_cabs{,f,l} directly. Using the __builtin_cabs{,f,l} in gcc is 419 still broken. 420 kcah 421 422 port vax 423 424 hack gcc4/vax ICE 425 cdate 426 who tsutsui 427 file sys/arch/vax/conf/Makefile.vax 428 descr 429 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 430 -fno-tree-ter prevents it so add it to COPTS. 431 kcah 432 433 hack gcc4/vax compiler crash 434 cdate Fri Jun 30 22:39:12 PDT 2006 435 who mrg 436 file bin/csh/Makefile : 1.27 437 file lib/i18n_module/UTF7/Makefile : 1.2 438 descr 439 GCC4 on vax crashes. -O0 stops it happening so far... 440 kcah 441 442 hack vax Toolchain bug 443 cdate 28 Mar 2003 444 who he 445 file sys/arch/vax/vax/intvec.S : 1.5 446 descr 447 Workaround for PR toolchain/20924. The assembler apparently 448 tries to range-check byte offsets when it doesn't have 449 sufficient information to make that decision. 450 Workaround uses `brw' instead of `brb' instruction. 451 kcah 452 453 hack declare boolean_t in two IPF user-mode programs 454 cdate Tue Mar 7 19:19:20 CET 2006 455 who he 456 file dist/ipf/ipsend/iptests.c : 1.8 457 dist/ipf/ipsend/sock.c : 1.7 458 descr 459 The IPF user-mode programs ipsend and iptest first 460 include <sys/types.h> without _KERNEL defined, and 461 later include <sys/file.h> with _KERNEL defined. 462 This causes a build failure when building for vax, 463 since <sys/device.h> ends up being included without 464 bollean_t being defined by <sys/types.h>. 465 Build failure and further details documented in 466 PR#32907. 467 kcah 468 469 hack pcc 0.9.9 large string literals 470 cdat 8 July 2008 471 who gmcgarry 472 file sys/conf/param.c : 1.58 473 descr 474 Workaround for pcc 0.9.9 not handling large string literals 475 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 476 fail compilation. 477 There is a proposal on the pcc mailing list to stuff config 478 file in ELF section. 479 kcah 480 481 hack xorg warnings 482 cdat 30 July 2008, 3 June, 2013 483 who mrg 484 file external/mit/xorg/lib/libSM/Makefile : 1.2 485 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 486 external/mit/xorg/lib/libXext/Makefile : 1.2 487 external/mit/xorg/lib/libXfont/Makefile : 1.2 488 descr 489 Disable several warnings or use -Wno-error across Xorg sources 490 while we get them working 491 kcah 492 493 hack 32 bit time leftovers 494 cdat 11 January 2009 495 who christos 496 file lib/libc/time/localtime.c : 1.41 497 lib/libc/time/zic.c : 1.23 498 descr 499 The timezone compiled files still contain 32 bit time_t 500 quantities. I did not want to version the files because 501 the ``parser'' is too ugly for words. What needs to be 502 done, is to rewrite the parser from scratch also to avoid 503 potential core-dumps from parsing invalid files. 504 kcah 505 506 hack 32 bit time leftovers 507 cdat 11 January 2009 508 who christos 509 file various 510 descr 511 Many filesystem on-disk formats have 32 bit times. 512 kcah 513 514 hack gcc 4.5 fsdb miscompile 515 date Sat Nov 9 11:03:02 EST 2013 516 who christos 517 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 518 descr 519 src/sbin/fsdb/fsdb.c: In function 'findblk': 520 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 521 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 522 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 523 (const_int 8 [0x8])) 524 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 525 -1 (nil)) 526 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 527 extract_insn, at recog.c:2103 528 kcah 529 530 hack gcc 4.8 gcc miscompiles 531 date Sat Nov 9 16:35:18 EST 2013 532 who christos 533 file distrib/utils/x_ping/Makefile 534 file distrib/vax/miniroot/Makefile.inc 535 file distrib/vax/ramdisk/Makefile 536 file external/gpl3/gdb/lib/libdecnumber/Makefile 537 file sbin/fsdb/Makefile 538 file sbin/newfs_ext2fs/Makefile 539 file sbin/ping/Makefile 540 file usr.sbin/lmcconfig/Makefile 541 file usr.sbin/mtrace/Makefile 542 descr 543 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 544 internal compiler error: in change_address_1, at emit-rtl.c:2019 545 external/gpl3/gcc/dist/gcc/recog.c:770:1: 546 internal compiler error: in change_address_1, at emit-rtl.c:2019 547 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 548 internal compiler error: in change_address_1, at emit-rtl.c:2019 549 sbin/ping/ping.c:679:1: 550 internal compiler error: in change_address_1, at emit-rtl.c:2019 551 sbin/newfs_ext2fs/mke2fs.c:681:1: 552 internal compiler error: in reload_combine_note_use, 553 at postreload.c:1561 554 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 555 internal compiler error: in change_address_1, at emit-rtl.c:2019 556 usr.sbin/lmcconfig/lmcconfig.c:939:3: 557 internal compiler error: in reload_combine_note_use, 558 at postreload.c:1561 559 usr.sbin/mtrace/mtrace.c:1655:1: 560 internal compiler error: in change_address_1, at emit-rtl.c:2019 561 kcah 562 563 port arm 564 565 hack gcc-unsigned-compare 566 cdate 09 Mar 2002 567 mdate 18 Mar 2002 568 who bjh21 569 file dist/bind/lib/nameser/ns_parse.c : 1.3 570 file dist/dhcp/minires/ns_parse.c : 1.3 571 file dist/dhcp/omapip/result.c : 1.2 572 file dist/dhcp/server/failover.c : 1.3 573 file gnu/dist/toolchain/bfd/bfd.c : 1.2 574 file gnu/dist/toolchain/bfd/format.c : 1.2 575 file gnu/dist/toolchain/gdb/target.c : 1.2 576 file sys/kern/vfs_subr.c : 1.172 577 descr When checking that a potentially-unsigned enum is >= 0, assign 578 it to an int first. This is necessary to avoid "comparison is 579 always true" warnings with -fshort-enums. Casting to an int 580 really should be enough, but turns out not to be. 581 kcah 582 583 hack gcc-4.5 arm CNAME hostname lookup failure on 584 certain DNS environment (probably -ftree-ter problem) 585 cdate Sat Dec 24 04:59:00 UTC 2011 586 mdate 587 who tsutsui 588 file lib/libc/net/Makefile.inc 1.79 589 descr Hostname lookup against CNAMEs by some commands fails 590 on certain DNS environments if lib/libc/net/gethnamaddr.c 591 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 592 are compiled with -O2, even though nslookup(1) against 593 the same CNAME returns proper hostname. 594 They works properly if compiled with -O2 -fno-tree-ter. 595 Also -O2 fails but -O2 -fno-tree-ter works on the following 596 test case in gcc bugzilla: 597 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 598 kcah 599 600 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 601 cdate Wed Nov 14 13:02:02 JST 2012 602 who msaitoh 603 file lib/libc/softfloat/Makefile.inc 604 pr 46953 605 regress src/tests/lib/libm/t_cbrt 606 regress src/tests/lib/libm/t_ceil 607 regress src/tests/lib/libm/t_exp 608 regress src/tests/lib/libm/t_log 609 regress src/tests/lib/libm/t_scalbn 610 regress src/tests/lib/libm/t_sinh 611 regress src/tests/lib/libm/t_sqrt 612 descr Gcc has a bug in tree optimization. For adddf3, 613 -INF + -INF returns 0 without -fno-tree-vrp. 614 Debugging with -fdump-tree-all shows that 615 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 616 is broken. 617 kcah 618 619 port sh3 620 621 hack gcc4-sh3-bz2 622 cdate Sun May 21 03:34:57 UTC 2006 623 mdate Fri May 16 13:13:00 UTC 2008 624 who mrg, tsutsui 625 file lib/libbz2/Makefile : 1.10 626 descr 627 The in-tree GCC 4.1-based compiler generated too-far 628 pc-relative addresses. Hack is to build with 629 -fno-loop-optimize. 630 kcah 631 632 port sh3eb 633 hack gcc4.8.1 634 cdate Thu Nov 7 16:31:23 EST 2013 635 who christos 636 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 637 desrc 638 for profiling 639 compile l2cap_signal.c with -O0 to avoid: 640 ./netbt/l2cap_signal.c:36: 641 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 642 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 643 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 644 impossible reload 645 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 646 kcah 647 648 port sh3el 649 hack gcc4.8.1 650 cdate Fri Nov 8 19:27:01 EST 2013 651 who christos 652 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 653 desrc 654 for profiling 655 compile evdns.c with -O0 to avoid: 656 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 657 impossible reload 658 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 659 kcah 660 661 hack gcc4.8.1 662 cdate Fri Nov 8 19:34:48 EST 2013 663 who christos 664 file src/usr.sbin/racoon/Makefile : 1.27 665 desrc 666 for profiling 667 compile ipsec_doi.c with -O0 to avoid: 668 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 669 impossible reload 670 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 671 kcah 672 673 port m68000 674 675 hack gcc4-m68000 676 cdate Fri Feb 8 10:29:37 PST 2008 677 mdate Sun May 4 15:37:19 UTC 2008 678 who mrg, tsutsui 679 file rescue/Makefile : 1.21 680 file sbin/dump_lfs/Makefile : 1.9 681 file sbin/fsck_ffs/Makefile : 1.35 682 file sbin/fsdb/Makefile : 1.22 683 file share/mk/sys.mk : 1.96 684 file usr.sbin/ndbootd/Makefile : 1.5 685 descr 686 Several internal compiler errors with gcc -O1 687 around 64bit integer arithmetic. 688 This hack uses -O1 and adds some -fno-tree-foo options 689 to avoid the problem. 690 This might be related with GCC Bugzilla Bug 32424. 691 kcah 692 693 port m68k,sh3,vax 694 695 hack gcc-4.8.1 696 cdate Wed Nov 6 20:41:35 EST 2013 697 who christos 698 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 699 descr 700 compile hashtable_c++0x.cc with -O2 instead of -Os to 701 produce missing instantiation of std::lower_bound expansion 702 for unsigned long. 703 kcah 704 705 port sparc 706 707 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 708 cdate Sun Aug 14 19:26:48 PDT 2011 709 who mrg 710 file sys/arch/sparc64/sparc/cpu.c : 1.234 711 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 712 file sys/arch/sparc64/sparc/genassym.cf : 1.67 713 file sys/arch/sparc64/sparc/locore.s : 1.265 714 descr 715 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 716 Post newlock2 there was a bug where a lock was reduced from 717 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 718 would crash due to NULL IPI. This was fixed by re-using the 719 right IPL value. However, GCC 4.5.3 build kernels have the 720 same problems. For now, the hack is re-instated. 721 kcah 722 723 724 port mips 725 726 hack mips-shared-linker-load-address 727 cdate Fri Oct 7 08:33:10 UTC 2005 728 who simonb 729 file src/sys/kern/exec_elf32.c : 1.107 730 descr 731 With COMPAT_16 or previous enabled (which enables 732 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 733 load and run at address 0. The check to fix this in 734 rev 1.107 only checks the first psection of the ELF 735 executable, which may not be loadable. A more correct 736 fix is to check the first loadable psection instead of 737 just the first psection. 738 kcah 739 740 hack mips-duplicate-ras-end-label 741 cdate Sat Sep 2 23:29:42 2006 742 who martin 743 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 744 descr 745 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 746 labels by duplicated __asm output from RAS_END() 747 macro. 748 kcah 749 750 hack mips-mcount-assembler-warning 751 cdate Tue Jul 29 14:16:52 UTC 2008 752 who lukem 753 file src/lib/libc/gmon/Makefile.inc : 1.8 754 descr 755 Workaround for PR port-mips/39192. 756 common/lib/libc/gmon/mcount.c generates a (fatal) 757 assembler warning on MIPS: 758 Warning: No .cprestore pseudo-op used in PIC code 759 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 760 kcah 761 762 port i386 763 764 hack use volatile intermediate variable to enforce rounding 765 cdate Tue Aug 1 22:15:55 MEST 2006 766 who drochner 767 file src/lib/libm/src/lrintf.c : 1.4 768 file src/lib/libm/src/s_rintf.c : 1.8 769 descr 770 gcc-4 does subsequent operations on "float" values within 771 the i387 FPU without rounding the intermediate results 772 kcah 773 774 port x86 775 hack turn off optimization for biosdisk_ll.c because otherwise 776 we are pass the wrong arguments to biosdisk_read(). 777 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 778 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 779 who christos 780 file src/sys/arch/i386/stand/lib/Makefile : 1.38 781 descr 782 Turning on DISK_DEBUG shows the problem. We should find 783 out which option is causing this. 784 hcah 785 786 port powerpc 787 788 hack avoid using __builtin_return_address(0) because it fails in 789 Xorg's module loader 790 cdate Sat Sep 27 03:52:05 UTC 2008 791 who macallan 792 file src/libexec/ld.elf_so/rtld.c : 1.121 793 descr 794 workaround for PR port-macppc/37812 795 kcah 796 797 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 798 building the native compiler via build.sh those don't defined 799 properly. 800 cdate Sat Mar 12 08:00:00 UTC 2011 801 who matt 802 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 803 descr 804 see above 805 kcah 806 807 port powerpc64 808 809 hack include _errno.c in libposix so that __errno resolves. It 810 should resolve from libc's errno, but somehow it does not. 811 Linker bug? 812 cdate Thu Oct 27 13:19:47 EDT 2011 813 who christos 814 file src/lib/libposix/Makefile: 1.15 815 file src/lib/librt/Makefile: 1.14 816 descr 817 workaround for: 818 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 819 R_PPC64_REL24 relocation against symbol `.__errno' 820 kcah 821 822 hack rename data() function in mdocml to avoid redefined error. 823 Compiler/Assembler bug? 824 cdate Sat Oct 29 11:16:01 EDT 2011 825 who christos 826 file src/external/bsd/mdocml/tbl_data.c: 1.2 827 descr 828 workaround for: 829 {standard input}: Assembler messages: 830 {standard input}:105: Error: symbol `.data' is already \ 831 defined 832 kcah 833 834 port emips 835 836 hack Add nop between ctc1 and mtc0 to avoid assembler internal 837 error 838 cdate Sat Oct 29 16:57:34 EDT 2011 839 who christos 840 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 841 descr 842 workaround for: 843 {standard input}: Assembler messages: 844 {standard input}:730: Internal error! 845 Assertion failure in append_insn at /usr/src/external/gpl3/\ 846 binutils/dist/gas/config/tc-mips.c line 2910. 847 kcah 848 849 port ia64 850 851 hack libc hesiod.c file does not compile with -O2 (internal 852 compiler error in gcc 4.5.3) 853 cdate Thu Dec 27 08:05:43 CET 2012 854 who martin 855 file src/lib/libc/net/Makefile.inc: 1.82 856 descr 857 workaround for: 858 {standard input}: Assembler messages: 859 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 860 {standard input}:1506: Warning: This is the location of the conflicting usage 861 {standard input}: Error: 2 warnings, treating warnings as errors 862 kcah 863 864 hack libelf libelf_extended.c compiler error in gcc 4.5.3 865 cdate Thu Dec 27 09:05:51 CET 2012 866 who martin 867 file src/external/bsd/libelf/lib/Makefile: 1.3 868 descr 869 workaround for: 870 {standard input}: Assembler messages: 871 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 872 {standard input}:87: Warning: Only the first path encountering the conflict is reported 873 {standard input}:85: Warning: This is the location of the conflicting usage 874 kcah 875 876 hack compiler error with gcc 4.5.x 877 cdate Thu Dec 27 15:15:25 CET 2012 878 who martin 879 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 880 descr 881 workaround for: 882 {standard input}: Assembler messages: 883 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 884 {standard input}:22978: Warning: This is the location of the conflicting usage 885 kcah 886 887 hack libgcc unwind dummy function 888 cdate Fri Apr 17 14:31:03 CEST 2015 889 who martin 890 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 891 descr 892 Add an empty _Unwind_FindTableEntry() implementation. 893 In the end we will use our libc stuff, and this should 894 go away again. 895 kcah 896 897 port x68k 898 899 hack compiler error with gcc 4.5.x 900 cdate Fri May 24 13:23:01 EDT 2013 901 who christos 902 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 903 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 904 descr 905 workaround for: 906 internal compiler error: in cselib_record_set, at cselib.c:1999 907 kcah 908 909 hack fallback to /usr/bin/clang-cpp in rpcgen 910 cdate Wed Jun 5 15:49:27 CEST 2013 911 who joerg 912 file src/usr.bin/rpcgen/rpc_main.c 913 descr 914 It is undecided which compiler owns /usr/bin/cpp and whether it should 915 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 916 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 917 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 918 kcah 919 920 port hppa 921 922 hack compiler error with gcc 4.5.x 923 cdate Tue Jul 23 07:42:28 BST 2013 924 who skrll 925 file src/sys/lib/libkern/Makefile.libkern: 1.26 926 descr 927 workaround for unanalysed codegen bug affecting md5c.c. 928 kcah 929 930 hack gdb vs _rtld_debug_state problem 931 cdate Thu Mar 5 09:49:53 UTC 2015 932 who skrll 933 file src/libexec/ld.elf_so/rtld.c: 1.175 934 descr 935 workaround for problem where gdb misses the breakpoint on 936 _rtld_debug_state when the function is only the 937 bv,n %r0(%rp) instruction - the nullify seems to 938 confuse something 939 kcah 940 941 port mips64* 942 hack compiler crashes on mips64* with optimization enabled 943 cdate Tue May 13 18:46:48 UTC 2014 944 who macallan 945 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 946 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 947 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 948 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 949 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 950 pr 48696 951 kcah 952 953 port vax 954 hack compile boot with -O1 955 cdate Sat May 24 09:40:58 CEST 2014 956 who martin 957 file src/sys/arch/vax/boot/boot/Makefile: 1.41 958 descr /boot does not work when compiled with -O2 and gcc 4.8 959 kcah 960 961 port arm 962 hack avoid using labels in a 12-bit constant. 963 who matt 964 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 965 descr workaround for clang misassembling an instruction 966 kcah 967
Indexes created Wed Nov 05 21:10:10 GMT 2025