HACKS revision 1.167
1 # $NetBSD: HACKS,v 1.167 2016/05/10 19:32:47 mrg 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 gcc-5.3 miscompiles crt* leading to ctor/dtor related crashes 31 mdate 10 May 2016 32 who mrg martin 33 file lib/csu/common/Makefile.inc : 1.26, 1.27, 1.31 34 descr 35 GCC assumes non-constant data is constant and assumes that it 36 can generate direct calls out of the ctor/dtor space, which 37 generally breaks their usage. On SPARC, an explicit call to 38 0 is generated as "clr %g1; call %g1", for example. 39 40 Compiling with -O1 fixes this problem. 41 pr 51121 42 kcah 43 44 hack gcc-5.3 optimizes memset+malloc -> calloc inside calloc 45 mdate 4 May 2016 46 who christos 47 file external/gpl2/lib/libmalloc/lib/Makefile 1.3 -> 1.5 48 descr 49 resulting in infinite recursion; we prevent this with 50 -fno-builtin-malloc 51 kcah 52 53 hack turn off tree-vrp for parts of ufs_lookup.c 54 mdate 28 April 2016 55 who mrg christos 56 file src/sys/ufs/ufs/ufs_lookup.c : 1.144 57 pr 51094 58 descr 59 with -ftree-vrp enabled in ufs_lookup.c sometimes bad dir 60 panicks are see. 61 hcah 62 63 hack netstat ieee1394 address printing. 64 mdate 14 Nov 2000 65 who matt 66 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 67 descr 68 Because the current implementation of IP over IEEE1394, the 69 fw device address contains more than just the IEEE1394 EUI-64. 70 So when printing out IEEE1394 addresses, ignore the extra stuff. 71 kcah 72 73 hack xterm vs. libterm 74 mdate 01 Aug 2000 75 who jdc 76 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 77 pr 10383 78 descr 79 In order to extend the termcap string over 1023 bytes, a ZZ entry was 80 introduced to point to a memory location containing the full entry. 81 Without this hack, xterm will export a termcap containing the ZZ 82 entry, which will then be ignored by libterm. As xterm modifies the 83 exported termcap, this would cause those modifications to be ignored. 84 kcah 85 86 hack wi-at-big-endian-bus 87 cdate 15 Mar 2002 88 who martin 89 file dev/ic/wireg.h 90 descr Add an option to access the underlying bus in big endian byte order 91 to work around deficiencies in bus_space_{read,write}_* macros. 92 Those don't allow the implementation of a proper pcmcia bus space 93 tag. 94 kcah 95 96 hack specific knowledge of colours in curses code 97 cdate Sun Apr 6 11:05:24 BST 2003 98 who jdc 99 file lib/libcurses/color.c : r1.24 100 descr 101 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 102 Fix is to enhance libtermcap to understand terminfo-style % sequences. 103 See also: 104 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 105 kcah 106 107 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 108 cdate 21 Aug 2003 109 who he 110 file sys/miscfs/procfs/procfs_linux.c : 1.14 111 descr 112 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 113 literals/constants, but refer to variables of a type which is 114 not "unsigned long", causing compilation of procfs_linux.c to 115 fail with "makes integer from pointer without a cast". This 116 is observed on e.g. the sun3 port. Ideally the "types" for 117 symbols should be consistent across all ports. 118 kcah 119 120 hack gcc-strict-aliasing 121 cdate 6 August 2004 122 who junyoung 123 pr 26516 124 file src/usr.sbin/racoon/racoon/Makefile : 1.21 125 descr 126 GCC issues a warning "dereferencing type-punned pointer will break 127 strict-aliasing rules" when compiling 128 crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this 129 is due to use of type casting in a non-standard way in the code and 130 not a compiler bug. Once a new release of KAME with a proper fix 131 applied is imported this should be backed out. 132 kcah 133 134 hack gcc4 wrong uninitialized variable 135 mdate 10 May 2006 136 who mrg 137 file bin/ksh/eval.c : 1.6 138 file bin/sh/histedit.c : 1.39 139 file bin/sh/parser.c : 1.60 140 file crypto/dist/heimdal/kdc/524.c : 1.10 141 file crypto/dist/ssh/sftp.c : 1.20 142 file crypto/dist/ssh/ssh-keysign.c : 1.11 143 file dist/ipf/lib/hostname.c : 1.2 144 file dist/ipf/tools/ipmon.c : 1.8 145 file dist/ntp/ntpd/ntp_request.c : 1.4 146 file dist/ntp/ntpd/refclock_shm.c : 1.4 147 file dist/ntp/sntp/timing.c : 1.3 148 file dist/pppd/pppstats/pppstats.c : 1.3 149 file dist/smbfs/lib/smb/rap.c : 1.6 150 file dist/tcpdump/print-zephyr.c : 1.5 151 file distrib/utils/sysinst/aout2elf.c : 1.12 152 file gnu/libexec/uucp/uucico/uucico.c : 1.6 153 file lib/libc/citrus/citrus_csmapper.c : 1.6 154 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 155 file lib/libc/inet/inet_cidr_ntop.c : 1.3 156 file lib/libc/inet/inet_ntop.c : 1.3 157 file lib/libc/stdio/vfwprintf.c : 1.8 158 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 159 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 160 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 161 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 162 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 163 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 164 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 165 file sbin/fsck_ext2fs/dir.c : 1.19 166 file sbin/routed/rtquery/rtquery.c : 1.18 167 file sys/arch/amd64/amd64/pmap.c : 1.26 168 file sys/arch/i386/pci/piixpcib.c : 1.4 169 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 170 file sys/crypto/cast128/cast128.c : 1.9 171 file sys/ddb/db_command.c : 1.86 172 file sys/dev/cardbus/cardbus_map.c : 1.21 173 file sys/dev/fss.c : 1.25 174 file sys/dev/ic/igsfb.c : 1.39 175 file sys/dev/ic/mb86950.c : 1.5 176 file sys/dev/ic/midway.c : 1.71 177 file sys/dev/kttcp.c : 1.18 178 file sys/dev/rasops/rasops_bitops.h : 1.9 179 file sys/dev/pci/cmpci.c : 1.31 180 file sys/dev/pci/machfb.c : 1.45 181 file sys/dev/usb/ohci.c : 1.174 182 file sys/dev/usb/uhci.c : 1.196 183 file sys/dev/rasops/rasops_bitops.h : 1.9 184 file sys/dist/ipf/netinet/ip_nat.c : 1.10 185 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 186 file sys/dist/pf/net/pf.c : 1.22 187 file sys/fs/udf/udf_vnops.c : 1.4 188 file sys/kern/kern_sig.c : 1.219 189 file sys/kern/tty.c : 1.181 190 file sys/net/bpf.c : 1.116 191 file sys/net/zlib.c : 1.26 192 file sys/netccitt/if_x25subr.c : 1.37 193 file sys/netinet/in.c : 1.107 194 file sys/netsmb/smb_smb.c : 1.27 195 file sys/netsmb/smb_trantcp.c : 1.22 196 file sys/nfs/nfs_serv.c : 1.108 197 file sys/nfs/nfs_socket.c : 1.129 198 file sys/nfs/nfs_syscalls.c : 1.91 199 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 200 file usr.bin/ftp/ftp.c : 1.140 201 file usr.bin/find/function.c : 1.54 202 file usr.bin/mail/tty.c : 1.20 203 file usr.bin/msgc/msg_sys.def : 1.33-1.34 204 file usr.bin/nl/nl.c : 1.7 205 file usr.bin/systat/keyboard.c : 1.23 206 file usr.bin/usbhidctl/usbhid.c : 1.29 207 file usr.bin/vi/cl/cl_read.c : 1.5 208 file usr.bin/vi/ex/ex_cscope.c : 1.12 209 file usr.bin/vi/ex/ex_tag.c : 1.19 210 file usr.bin/vi/vi/v_txt.c : 1.15 211 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 212 file usr.sbin/cron/do_command.c : 1.19 213 file usr.sbin/timed/timed/slave.c : 1.15 214 descr 215 GCC 4.1 gets many uninitialised variable warnings wrong. We should 216 really audit all the old hacks like this when older compilers are 217 removed from the tree, as many are probably no longer required. 218 The problem is that it does not recognize initialization via function 219 call pointer. I.e. 220 int p; 221 foo(&p); 222 does not mark p as initialized. 223 kcah 224 225 hack gcc4 pointer sign and strict aliasing problems 226 mdate 10 May 2006 227 who mrg 228 file bin/ed/Makefile : 1.33 229 file distrib/utils/sysinst/Makefile.inc : 1.44 230 file distrib/utils/x_dhclient/Makefile : 1.15 231 file games/bcd/Makefile : 1.5 232 file games/dab/Makefile : 1.5 233 file games/larn/Makefile : 1.17 234 file games/pom/Makefile : 1.5 235 file lib/libasn1/Makefile : 1.26 236 file lib/libcrypt/Makefile : 1.17 237 file lib/libgssapi/Makefile : 1.16 238 file lib/libhdb/Makefile : 1.20 239 file lib/libkadm5clnt/Makefile : 1.21 240 file lib/libkadm5srv/Makefile : 1.25 241 file lib/libkrb5/Makefile : 1.35 242 file lib/libssh/Makefile : 1.6 243 file lib/libtelnet/Makefile : 1.26 244 file libexec/getty/Makefile : 1.14 245 file libexec/kadmind/Makefile : 1.19 246 file libexec/kpasswdd/Makefile : 1.14 247 file sbin/atactl/Makefile : 1.3 248 file sbin/cgdconfig/Makefile : 1.7 249 file sbin/clri/Makefile : 1.13 250 file sbin/dkctl/Makefile : 1.4 251 file sbin/dump/Makefile : 1.33 252 file sbin/fdisk/Makefile : 1.35 253 file sbin/fsck_ext2fs/Makefile : 1.11 254 file sbin/fsck_ffs/Makefile : 1.29 255 file sbin/fsdb/Makefile : 1.18 256 file sbin/mount_smbfs/Makefile : 1.4 257 file sbin/newfs/Makefile : 1.30 258 file sbin/newfs_sysvbfs/Makefile : 1.2 259 file sbin/restore/Makefile : 1.23 260 file sbin/veriexecctl/Makefile : 1.11 261 file sys/lib/libsa/Makefile : 1.59 262 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 263 file usr.bin/awk/Makefile : 1.9 264 file usr.bin/crontab/Makefile : 1.24 265 file usr.bin/ctags/Makefile : 1.8 266 file usr.bin/gzip/Makefile : 1.10 267 file usr.bin/ssh/sftp/Makefile : 1.10 268 file usr.bin/ssh/ssh/Makefile : 1.25 269 file usr.bin/vi/build/Makefile : 1.26 270 file usr.bin/telnet/Makefile : 1.40 271 file usr.bin/tn3270/tn3270/Makefile : 1.36 272 file usr.bin/tr/Makefile : 1.4 273 file usr.sbin/amd/amd/Makefile : 1.27 274 file usr.sbin/amd/amq/Makefile : 1.14 275 file usr.sbin/amd/libamu/Makefile : 1.20 276 file usr.sbin/amd/pawd/Makefile : 1.5 277 file usr.sbin/bind/Makefile.inc : 1.22 278 file usr.sbin/bind/libdns/Makefile : 1.3 279 file usr.sbin/bind/named/Makefile : 1.17 280 file usr.sbin/bootp/bootptest/Makefile : 1.2 281 file usr.sbin/chrtbl/Makefile : 1.6 282 file usr.sbin/cron/Makefile : 1.12 283 file usr.sbin/dhcp/Makefile.inc : 1.20 284 file usr.sbin/dumplfs/Makefile : 1.11 285 file usr.sbin/hprop/Makefile : 1.13 286 file usr.sbin/installboot/Makefile : 1.35 287 file usr.sbin/ipf/ipftest/Makefile : 1.32 288 file usr.sbin/isdn/isdnd/Makefile : 1.6 289 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 290 file usr.sbin/isdn/isdntel/Makefile : 1.2 291 file usr.sbin/isdn/isdntrace/Makefile : 126 292 file usr.sbin/mopd/common/Makefile : 1.10 293 file usr.sbin/mopd/mopd/Makefile : 1.9 294 file usr.sbin/mopd/mopprobe/Makefile : 1.7 295 file usr.sbin/makefs/Makefile : 1.17 296 file usr.sbin/mscdlabel/Makefile : 1.5 297 file usr.sbin/pkg_install/add/Makefile : 1.7 298 file usr.sbin/pkg_install/create/Makefile : 1.5 299 file usr.sbin/pkg_install/lib/Makefile : 1.28 300 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 301 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 302 file usr.sbin/pppd/Makefile.inc : 1.3 303 file usr.sbin/pppd/pppd/Makefile : 1.38 304 file usr.sbin/rarpd/Makefile : 1.10 305 file usr.sbin/rbootd/Makefile : 1.10 306 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 307 file usr.sbin/rtadvd/Makefile : 1.9 308 file usr.sbin/tcpdump/Makefile : 1.42 309 file usr.sbin/wiconfig/Makefile : 1.3 310 descr 311 GCC 4.1 warns on pointer sign comparision/assignments and lots of 312 code does not conform. For now we use -Wno-pointer-sign and 313 -fno-strict-aliasing. 314 kcah 315 316 hack disable ctf for gcc-4.8 build 317 mdate April 3 2014 318 who christos 319 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 320 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 321 descr 322 nbctfconvert -g -L VERSION -g fold-const.o 323 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 324 ((null)) <13532> 325 kcak 326 327 hack emacs aborting on exit (libgcc issue) 328 mdate 7 November 2011 329 who christos 330 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 331 descr 332 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 333 to do just that. If the symbol requested is not found, then it aborts. 334 emacs 23.3 triggers this assertion. For now disable aborting, and 335 silently ignore. 336 kcah 337 338 hack cross-building hack on Darwin 339 mdate 20 July 2008 340 who agc 341 file src/distrib/common/Makefile.mdset : 1.33 342 descr 343 Darwin has problems with getopt() when used in mdsetimage -v, 344 due to the difference between BSD and libiberty() getopt 345 implementations, more fully described in 346 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 347 and the subsequent thread. For just now, we just have an ugly 348 workaround not to call mdsetimage with the -v argument on Darwin 349 kcah 350 351 hack avoid rebuilding asn1 libraries 352 mdate 03 August 2008 353 who veego 354 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 355 file src/lib/libasn1/Makefile : 1.32 356 file src/lib/libhdb/Makefile : 1.23 357 file src/lib/libgssapi/Makefile : 1.20 358 file src/lib/libhx509/Makefile : 1.3 359 pr 9702 39185 360 descr 361 asn1_compile does not check if generated header files do not have to 362 be rebuild. 363 Generate .hx files and copy it in the Makefiles if they changed. 364 kcah 365 366 hack avoid gcc4 -O1 bug in loop optimize 367 cdate 29 November 2008 368 who tsutsui 369 file src/sbin/ifconfig/Makefile : 1.39 370 pr 40036 40066 371 descr 372 gcc -O1 seems to generate wrong code in loop optimize so that 373 ifconfig lo0 inet6 doesn't return error even if a kernel 374 doesn't have IPv6 support. (see the above PRs for details) 375 For workaround, specify -fno-loop-optimize on m68000, 376 which uses -O1 by default. 377 kcah 378 379 hack MKPIE ldscript for /usr.sbin/crash 380 cdate 22 April 2010 381 who christos 382 file src/usr.sbin/crash/Makefile : 1.5 383 file src/usr.sbin/crash/ldscript.crash : 1.1 384 pr N/A 385 descr 386 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 387 sections 388 kcah 389 390 hack Disable fortification for /usr/bin/makeinfo 391 cdata 24 Mar 2014 392 who tron 393 file src/gnu/usr.bin/texinfo/makeinfo/Makefile : 1.8 394 pr N/A 395 descr 396 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 397 it fails to process certain texinfo files, e.g. "cl.texi" 398 included in the Emacs 24.3 distribution. 399 kcah 400 401 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 402 cdata 05 Apr 2014 403 who tron 404 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 405 pr N/A 406 descr 407 If "xauth" is compile with "USE_SSP" set to "yes" it fails 408 mysteriously with an error message like this: 409 410 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 411 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 412 413 The compiler seems to get confused about the two filename variables 414 used in the link(2) system call. 415 kcah 416 417 hack g++ 5.x barfs on volatile in constexpr initializers 418 cdata 27 Aug 2015 419 who pooka 420 file src/lib/libpthread/pthread_types.h : 1.17 421 pr lib/49989 422 descr 423 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 424 in C++ results in: 425 error: temporary of non-literal type '__pthread_mutex_st' 426 in a constant expression 427 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 428 [...] 429 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 430 not literal because: 431 struct __pthread_mutex_st { 432 ^ 433 include/pthread_types.h:103:17: note: non-static data 434 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 435 pthread_spin_t ptm_errorcheck; 436 kcah 437 438 hack libm cabs{,f,l} and g++ 439 cdata 11 Jan 2016 440 who christos 441 pr lib/50646 442 file src/external/gpl3/gcc.old/dist/libstdc++-v3/include/std/complex : 1.2 443 file src/external/gpl3/gcc/dist/libstdc++-v3/include/std/complex : 1.2 444 descr 445 Our cabs and cabsf have a different argument format on some architectures 446 and for that we have created in libm/compat_cabs{,f}.c. The standard 447 versions in libc are __c99_cabs{,f,l} and there are __RENAME()'s in 448 <complex.h>. G++ uses __builtin_cabs{,f,l} to implement those and they 449 translate by default to cabs{,f,l} which gets defined to cabs{,f} (the 450 wrong function) and an undefined cabsl. I've changed <complex> to use 451 the __c99_cabs{,f,l} directly. Using the __builtin_cabs{,f,l} in gcc is 452 still broken. 453 kcah 454 455 port vax 456 457 hack gcc4/vax ICE 458 cdate 459 who tsutsui 460 file sys/arch/vax/conf/Makefile.vax 461 descr 462 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 463 -fno-tree-ter prevents it so add it to COPTS. 464 kcah 465 466 hack gcc4/vax compiler crash 467 cdate Fri Jun 30 22:39:12 PDT 2006 468 who mrg 469 file bin/csh/Makefile : 1.27 470 file lib/i18n_module/UTF7/Makefile : 1.2 471 descr 472 GCC4 on vax crashes. -O0 stops it happening so far... 473 kcah 474 475 hack vax Toolchain bug 476 cdate 28 Mar 2003 477 who he 478 file sys/arch/vax/vax/intvec.S : 1.5 479 descr 480 Workaround for PR toolchain/20924. The assembler apparently 481 tries to range-check byte offsets when it doesn't have 482 sufficient information to make that decision. 483 Workaround uses `brw' instead of `brb' instruction. 484 kcah 485 486 hack declare boolean_t in two IPF user-mode programs 487 cdate Tue Mar 7 19:19:20 CET 2006 488 who he 489 file dist/ipf/ipsend/iptests.c : 1.8 490 dist/ipf/ipsend/sock.c : 1.7 491 descr 492 The IPF user-mode programs ipsend and iptest first 493 include <sys/types.h> without _KERNEL defined, and 494 later include <sys/file.h> with _KERNEL defined. 495 This causes a build failure when building for vax, 496 since <sys/device.h> ends up being included without 497 bollean_t being defined by <sys/types.h>. 498 Build failure and further details documented in 499 PR#32907. 500 kcah 501 502 hack pcc 0.9.9 large string literals 503 cdat 8 July 2008 504 who gmcgarry 505 file sys/conf/param.c : 1.58 506 descr 507 Workaround for pcc 0.9.9 not handling large string literals 508 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 509 fail compilation. 510 There is a proposal on the pcc mailing list to stuff config 511 file in ELF section. 512 kcah 513 514 hack xorg warnings 515 cdat 30 July 2008, 3 June, 2013 516 who mrg 517 file external/mit/xorg/lib/libSM/Makefile : 1.2 518 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 519 external/mit/xorg/lib/libXext/Makefile : 1.2 520 external/mit/xorg/lib/libXfont/Makefile : 1.2 521 descr 522 Disable several warnings or use -Wno-error across Xorg sources 523 while we get them working 524 kcah 525 526 hack 32 bit time leftovers 527 cdat 11 January 2009 528 who christos 529 file lib/libc/time/localtime.c : 1.41 530 lib/libc/time/zic.c : 1.23 531 descr 532 The timezone compiled files still contain 32 bit time_t 533 quantities. I did not want to version the files because 534 the ``parser'' is too ugly for words. What needs to be 535 done, is to rewrite the parser from scratch also to avoid 536 potential core-dumps from parsing invalid files. 537 kcah 538 539 hack 32 bit time leftovers 540 cdat 11 January 2009 541 who christos 542 file various 543 descr 544 Many filesystem on-disk formats have 32 bit times. 545 kcah 546 547 hack gcc 4.5 fsdb miscompile 548 date Sat Nov 9 11:03:02 EST 2013 549 who christos 550 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 551 descr 552 src/sbin/fsdb/fsdb.c: In function 'findblk': 553 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 554 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 555 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 556 (const_int 8 [0x8])) 557 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 558 -1 (nil)) 559 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 560 extract_insn, at recog.c:2103 561 kcah 562 563 hack gcc 4.8 gcc miscompiles 564 date Sat Nov 9 16:35:18 EST 2013 565 who christos 566 file distrib/utils/x_ping/Makefile 567 file distrib/vax/miniroot/Makefile.inc 568 file distrib/vax/ramdisk/Makefile 569 file external/gpl3/gdb/lib/libdecnumber/Makefile 570 file sbin/fsdb/Makefile 571 file sbin/newfs_ext2fs/Makefile 572 file sbin/ping/Makefile 573 file usr.sbin/lmcconfig/Makefile 574 file usr.sbin/mtrace/Makefile 575 descr 576 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 577 internal compiler error: in change_address_1, at emit-rtl.c:2019 578 external/gpl3/gcc/dist/gcc/recog.c:770:1: 579 internal compiler error: in change_address_1, at emit-rtl.c:2019 580 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 581 internal compiler error: in change_address_1, at emit-rtl.c:2019 582 sbin/ping/ping.c:679:1: 583 internal compiler error: in change_address_1, at emit-rtl.c:2019 584 sbin/newfs_ext2fs/mke2fs.c:681:1: 585 internal compiler error: in reload_combine_note_use, 586 at postreload.c:1561 587 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 588 internal compiler error: in change_address_1, at emit-rtl.c:2019 589 usr.sbin/lmcconfig/lmcconfig.c:939:3: 590 internal compiler error: in reload_combine_note_use, 591 at postreload.c:1561 592 usr.sbin/mtrace/mtrace.c:1655:1: 593 internal compiler error: in change_address_1, at emit-rtl.c:2019 594 kcah 595 596 port arm 597 598 hack gcc-unsigned-compare 599 cdate 09 Mar 2002 600 mdate 18 Mar 2002 601 who bjh21 602 file dist/bind/lib/nameser/ns_parse.c : 1.3 603 file dist/dhcp/minires/ns_parse.c : 1.3 604 file dist/dhcp/omapip/result.c : 1.2 605 file dist/dhcp/server/failover.c : 1.3 606 file gnu/dist/toolchain/bfd/bfd.c : 1.2 607 file gnu/dist/toolchain/bfd/format.c : 1.2 608 file gnu/dist/toolchain/gdb/target.c : 1.2 609 file sys/kern/vfs_subr.c : 1.172 610 descr When checking that a potentially-unsigned enum is >= 0, assign 611 it to an int first. This is necessary to avoid "comparison is 612 always true" warnings with -fshort-enums. Casting to an int 613 really should be enough, but turns out not to be. 614 kcah 615 616 hack gcc-4.5 arm CNAME hostname lookup failure on 617 certain DNS environment (probably -ftree-ter problem) 618 cdate Sat Dec 24 04:59:00 UTC 2011 619 mdate 620 who tsutsui 621 file lib/libc/net/Makefile.inc 1.79 622 descr Hostname lookup against CNAMEs by some commands fails 623 on certain DNS environments if lib/libc/net/gethnamaddr.c 624 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 625 are compiled with -O2, even though nslookup(1) against 626 the same CNAME returns proper hostname. 627 They works properly if compiled with -O2 -fno-tree-ter. 628 Also -O2 fails but -O2 -fno-tree-ter works on the following 629 test case in gcc bugzilla: 630 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 631 kcah 632 633 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 634 cdate Wed Nov 14 13:02:02 JST 2012 635 who msaitoh 636 file lib/libc/softfloat/Makefile.inc 637 pr 46953 638 regress src/tests/lib/libm/t_cbrt 639 regress src/tests/lib/libm/t_ceil 640 regress src/tests/lib/libm/t_exp 641 regress src/tests/lib/libm/t_log 642 regress src/tests/lib/libm/t_scalbn 643 regress src/tests/lib/libm/t_sinh 644 regress src/tests/lib/libm/t_sqrt 645 descr Gcc has a bug in tree optimization. For adddf3, 646 -INF + -INF returns 0 without -fno-tree-vrp. 647 Debugging with -fdump-tree-all shows that 648 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 649 is broken. 650 kcah 651 652 port sh3 653 654 hack gcc4-sh3-bz2 655 cdate Sun May 21 03:34:57 UTC 2006 656 mdate Fri May 16 13:13:00 UTC 2008 657 who mrg, tsutsui 658 file lib/libbz2/Makefile : 1.10 659 descr 660 The in-tree GCC 4.1-based compiler generated too-far 661 pc-relative addresses. Hack is to build with 662 -fno-loop-optimize. 663 kcah 664 665 port sh3eb 666 hack gcc4.8.1 667 cdate Thu Nov 7 16:31:23 EST 2013 668 who christos 669 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 670 desrc 671 for profiling 672 compile l2cap_signal.c with -O0 to avoid: 673 ./netbt/l2cap_signal.c:36: 674 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 675 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 676 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 677 impossible reload 678 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 679 kcah 680 681 port sh3el 682 hack gcc4.8.1 683 cdate Fri Nov 8 19:27:01 EST 2013 684 who christos 685 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 686 desrc 687 for profiling 688 compile evdns.c with -O0 to avoid: 689 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 690 impossible reload 691 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 692 kcah 693 694 hack gcc4.8.1 695 cdate Fri Nov 8 19:34:48 EST 2013 696 who christos 697 file src/usr.sbin/racoon/Makefile : 1.27 698 desrc 699 for profiling 700 compile ipsec_doi.c with -O0 to avoid: 701 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 702 impossible reload 703 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 704 kcah 705 706 port m68000 707 708 hack gcc4-m68000 709 cdate Fri Feb 8 10:29:37 PST 2008 710 mdate Sun May 4 15:37:19 UTC 2008 711 who mrg, tsutsui 712 file rescue/Makefile : 1.21 713 file sbin/dump_lfs/Makefile : 1.9 714 file sbin/fsck_ffs/Makefile : 1.35 715 file sbin/fsdb/Makefile : 1.22 716 file share/mk/sys.mk : 1.96 717 file usr.sbin/ndbootd/Makefile : 1.5 718 descr 719 Several internal compiler errors with gcc -O1 720 around 64bit integer arithmetic. 721 This hack uses -O1 and adds some -fno-tree-foo options 722 to avoid the problem. 723 This might be related with GCC Bugzilla Bug 32424. 724 kcah 725 726 port m68k,sh3,vax 727 728 hack gcc-4.8.1 729 cdate Wed Nov 6 20:41:35 EST 2013 730 who christos 731 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 732 descr 733 compile hashtable_c++0x.cc with -O2 instead of -Os to 734 produce missing instantiation of std::lower_bound expansion 735 for unsigned long. 736 kcah 737 738 port sparc 739 740 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 741 cdate Sun Aug 14 19:26:48 PDT 2011 742 who mrg 743 file sys/arch/sparc64/sparc/cpu.c : 1.234 744 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 745 file sys/arch/sparc64/sparc/genassym.cf : 1.67 746 file sys/arch/sparc64/sparc/locore.s : 1.265 747 descr 748 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 749 Post newlock2 there was a bug where a lock was reduced from 750 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 751 would crash due to NULL IPI. This was fixed by re-using the 752 right IPL value. However, GCC 4.5.3 build kernels have the 753 same problems. For now, the hack is re-instated. 754 kcah 755 756 757 port mips 758 759 hack mips-shared-linker-load-address 760 cdate Fri Oct 7 08:33:10 UTC 2005 761 who simonb 762 file src/sys/kern/exec_elf32.c : 1.107 763 descr 764 With COMPAT_16 or previous enabled (which enables 765 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 766 load and run at address 0. The check to fix this in 767 rev 1.107 only checks the first psection of the ELF 768 executable, which may not be loadable. A more correct 769 fix is to check the first loadable psection instead of 770 just the first psection. 771 kcah 772 773 hack mips-duplicate-ras-end-label 774 cdate Sat Sep 2 23:29:42 2006 775 who martin 776 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 777 descr 778 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 779 labels by duplicated __asm output from RAS_END() 780 macro. 781 kcah 782 783 hack mips-mcount-assembler-warning 784 cdate Tue Jul 29 14:16:52 UTC 2008 785 who lukem 786 file src/lib/libc/gmon/Makefile.inc : 1.8 787 descr 788 Workaround for PR port-mips/39192. 789 common/lib/libc/gmon/mcount.c generates a (fatal) 790 assembler warning on MIPS: 791 Warning: No .cprestore pseudo-op used in PIC code 792 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 793 kcah 794 795 port i386 796 797 hack use volatile intermediate variable to enforce rounding 798 cdate Tue Aug 1 22:15:55 MEST 2006 799 who drochner 800 file src/lib/libm/src/lrintf.c : 1.4 801 file src/lib/libm/src/s_rintf.c : 1.8 802 descr 803 gcc-4 does subsequent operations on "float" values within 804 the i387 FPU without rounding the intermediate results 805 kcah 806 807 port x86 808 hack turn off optimization for biosdisk_ll.c because otherwise 809 we are pass the wrong arguments to biosdisk_read(). 810 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 811 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 812 who christos 813 file src/sys/arch/i386/stand/lib/Makefile : 1.38 814 descr 815 Turning on DISK_DEBUG shows the problem. We should find 816 out which option is causing this. 817 hcah 818 819 port powerpc 820 821 hack avoid using __builtin_return_address(0) because it fails in 822 Xorg's module loader 823 cdate Sat Sep 27 03:52:05 UTC 2008 824 who macallan 825 file src/libexec/ld.elf_so/rtld.c : 1.121 826 descr 827 workaround for PR port-macppc/37812 828 kcah 829 830 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 831 building the native compiler via build.sh those don't defined 832 properly. 833 cdate Sat Mar 12 08:00:00 UTC 2011 834 who matt 835 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 836 descr 837 see above 838 kcah 839 840 port powerpc64 841 842 hack include _errno.c in libposix so that __errno resolves. It 843 should resolve from libc's errno, but somehow it does not. 844 Linker bug? 845 cdate Thu Oct 27 13:19:47 EDT 2011 846 who christos 847 file src/lib/libposix/Makefile: 1.15 848 file src/lib/librt/Makefile: 1.14 849 descr 850 workaround for: 851 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 852 R_PPC64_REL24 relocation against symbol `.__errno' 853 kcah 854 855 hack rename data() function in mdocml to avoid redefined error. 856 Compiler/Assembler bug? 857 cdate Sat Oct 29 11:16:01 EDT 2011 858 who christos 859 file src/external/bsd/mdocml/tbl_data.c: 1.2 860 descr 861 workaround for: 862 {standard input}: Assembler messages: 863 {standard input}:105: Error: symbol `.data' is already \ 864 defined 865 kcah 866 867 port emips 868 869 hack Add nop between ctc1 and mtc0 to avoid assembler internal 870 error 871 cdate Sat Oct 29 16:57:34 EDT 2011 872 who christos 873 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 874 descr 875 workaround for: 876 {standard input}: Assembler messages: 877 {standard input}:730: Internal error! 878 Assertion failure in append_insn at /usr/src/external/gpl3/\ 879 binutils/dist/gas/config/tc-mips.c line 2910. 880 kcah 881 882 port ia64 883 884 hack libc hesiod.c file does not compile with -O2 (internal 885 compiler error in gcc 4.5.3) 886 cdate Thu Dec 27 08:05:43 CET 2012 887 who martin 888 file src/lib/libc/net/Makefile.inc: 1.82 889 descr 890 workaround for: 891 {standard input}: Assembler messages: 892 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 893 {standard input}:1506: Warning: This is the location of the conflicting usage 894 {standard input}: Error: 2 warnings, treating warnings as errors 895 kcah 896 897 hack libelf libelf_extended.c compiler error in gcc 4.5.3 898 cdate Thu Dec 27 09:05:51 CET 2012 899 who martin 900 file src/external/bsd/libelf/lib/Makefile: 1.3 901 descr 902 workaround for: 903 {standard input}: Assembler messages: 904 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 905 {standard input}:87: Warning: Only the first path encountering the conflict is reported 906 {standard input}:85: Warning: This is the location of the conflicting usage 907 kcah 908 909 hack compiler error with gcc 4.5.x 910 cdate Thu Dec 27 15:15:25 CET 2012 911 who martin 912 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 913 descr 914 workaround for: 915 {standard input}: Assembler messages: 916 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 917 {standard input}:22978: Warning: This is the location of the conflicting usage 918 kcah 919 920 hack libgcc unwind dummy function 921 cdate Fri Apr 17 14:31:03 CEST 2015 922 who martin 923 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 924 descr 925 Add an empty _Unwind_FindTableEntry() implementation. 926 In the end we will use our libc stuff, and this should 927 go away again. 928 kcah 929 930 port x68k 931 932 hack compiler error with gcc 4.5.x 933 cdate Fri May 24 13:23:01 EDT 2013 934 who christos 935 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 936 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 937 descr 938 workaround for: 939 internal compiler error: in cselib_record_set, at cselib.c:1999 940 kcah 941 942 hack fallback to /usr/bin/clang-cpp in rpcgen 943 cdate Wed Jun 5 15:49:27 CEST 2013 944 who joerg 945 file src/usr.bin/rpcgen/rpc_main.c 946 descr 947 It is undecided which compiler owns /usr/bin/cpp and whether it should 948 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 949 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 950 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 951 kcah 952 953 port hppa 954 955 hack compiler error with gcc 4.5.x 956 cdate Tue Jul 23 07:42:28 BST 2013 957 who skrll 958 file src/sys/lib/libkern/Makefile.libkern: 1.26 959 descr 960 workaround for unanalysed codegen bug affecting md5c.c. 961 kcah 962 963 hack gdb vs _rtld_debug_state problem 964 cdate Thu Mar 5 09:49:53 UTC 2015 965 who skrll 966 file src/libexec/ld.elf_so/rtld.c: 1.175 967 descr 968 workaround for problem where gdb misses the breakpoint on 969 _rtld_debug_state when the function is only the 970 bv,n %r0(%rp) instruction - the nullify seems to 971 confuse something 972 kcah 973 974 port mips64* 975 hack compiler crashes on mips64* with optimization enabled 976 cdate Tue May 13 18:46:48 UTC 2014 977 who macallan 978 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 979 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 980 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 981 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 982 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 983 pr 48696 984 kcah 985 986 port vax 987 hack compile boot with -O1 988 cdate Sat May 24 09:40:58 CEST 2014 989 who martin 990 file src/sys/arch/vax/boot/boot/Makefile: 1.41 991 descr /boot does not work when compiled with -O2 and gcc 4.8 992 kcah 993 994 port arm 995 hack avoid using labels in a 12-bit constant. 996 who matt 997 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 998 descr workaround for clang misassembling an instruction 999 kcah 1000
Indexes created Wed Nov 05 19:10:08 GMT 2025