HACKS revision 1.176
1 # $NetBSD: HACKS,v 1.176 2017/02/08 23:13:59 rin 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 optimizes memset+malloc -> calloc inside calloc 31 mdate 4 May 2016 32 who christos 33 file external/gpl2/lib/libmalloc/lib/Makefile 1.3 -> 1.5 34 descr 35 resulting in infinite recursion; we prevent this with 36 -fno-builtin-malloc 37 kcah 38 39 hack turn off tree-vrp for parts of ufs_lookup.c 40 mdate 28 April 2016 41 who mrg christos 42 file src/sys/ufs/ufs/ufs_lookup.c : 1.144 43 pr 51094 44 descr 45 with -ftree-vrp enabled in ufs_lookup.c sometimes bad dir 46 panicks are see. 47 hcah 48 49 hack netstat ieee1394 address printing. 50 mdate 14 Nov 2000 51 who matt 52 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 53 descr 54 Because the current implementation of IP over IEEE1394, the 55 fw device address contains more than just the IEEE1394 EUI-64. 56 So when printing out IEEE1394 addresses, ignore the extra stuff. 57 kcah 58 59 hack xterm vs. libterm 60 mdate 01 Aug 2000 61 who jdc 62 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 63 pr 10383 64 descr 65 In order to extend the termcap string over 1023 bytes, a ZZ entry was 66 introduced to point to a memory location containing the full entry. 67 Without this hack, xterm will export a termcap containing the ZZ 68 entry, which will then be ignored by libterm. As xterm modifies the 69 exported termcap, this would cause those modifications to be ignored. 70 kcah 71 72 hack wi-at-big-endian-bus 73 cdate 15 Mar 2002 74 who martin 75 file dev/ic/wireg.h 76 descr Add an option to access the underlying bus in big endian byte order 77 to work around deficiencies in bus_space_{read,write}_* macros. 78 Those don't allow the implementation of a proper pcmcia bus space 79 tag. 80 kcah 81 82 hack specific knowledge of colours in curses code 83 cdate Sun Apr 6 11:05:24 BST 2003 84 who jdc 85 file lib/libcurses/color.c : r1.24 86 descr 87 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 88 Fix is to enhance libtermcap to understand terminfo-style % sequences. 89 See also: 90 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 91 kcah 92 93 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 94 cdate 21 Aug 2003 95 who he 96 file sys/miscfs/procfs/procfs_linux.c : 1.14 97 descr 98 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 99 literals/constants, but refer to variables of a type which is 100 not "unsigned long", causing compilation of procfs_linux.c to 101 fail with "makes integer from pointer without a cast". This 102 is observed on e.g. the sun3 port. Ideally the "types" for 103 symbols should be consistent across all ports. 104 kcah 105 106 hack gcc4 wrong uninitialized variable 107 mdate 10 May 2006 108 who mrg 109 file bin/ksh/eval.c : 1.6 110 file bin/sh/histedit.c : 1.39 111 file bin/sh/parser.c : 1.60 112 file crypto/dist/heimdal/kdc/524.c : 1.10 113 file crypto/dist/ssh/sftp.c : 1.20 114 file crypto/dist/ssh/ssh-keysign.c : 1.11 115 file dist/ipf/lib/hostname.c : 1.2 116 file dist/ipf/tools/ipmon.c : 1.8 117 file dist/ntp/ntpd/ntp_request.c : 1.4 118 file dist/ntp/ntpd/refclock_shm.c : 1.4 119 file dist/ntp/sntp/timing.c : 1.3 120 file dist/pppd/pppstats/pppstats.c : 1.3 121 file dist/smbfs/lib/smb/rap.c : 1.6 122 file dist/tcpdump/print-zephyr.c : 1.5 123 file distrib/utils/sysinst/aout2elf.c : 1.12 124 file gnu/libexec/uucp/uucico/uucico.c : 1.6 125 file lib/libc/citrus/citrus_csmapper.c : 1.6 126 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 127 file lib/libc/inet/inet_cidr_ntop.c : 1.3 128 file lib/libc/inet/inet_ntop.c : 1.3 129 file lib/libc/stdio/vfwprintf.c : 1.8 130 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 131 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 132 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 133 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 134 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 135 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 136 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 137 file sbin/fsck_ext2fs/dir.c : 1.19 138 file sbin/routed/rtquery/rtquery.c : 1.18 139 file sys/arch/amd64/amd64/pmap.c : 1.26 140 file sys/arch/i386/pci/piixpcib.c : 1.4 141 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 142 file sys/crypto/cast128/cast128.c : 1.9 143 file sys/ddb/db_command.c : 1.86 144 file sys/dev/cardbus/cardbus_map.c : 1.21 145 file sys/dev/fss.c : 1.25 146 file sys/dev/ic/igsfb.c : 1.39 147 file sys/dev/ic/mb86950.c : 1.5 148 file sys/dev/ic/midway.c : 1.71 149 file sys/dev/kttcp.c : 1.18 150 file sys/dev/rasops/rasops_bitops.h : 1.9 151 file sys/dev/pci/cmpci.c : 1.31 152 file sys/dev/pci/machfb.c : 1.45 153 file sys/dev/usb/ohci.c : 1.174 154 file sys/dev/usb/uhci.c : 1.196 155 file sys/dev/rasops/rasops_bitops.h : 1.9 156 file sys/dist/ipf/netinet/ip_nat.c : 1.10 157 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 158 file sys/dist/pf/net/pf.c : 1.22 159 file sys/fs/udf/udf_vnops.c : 1.4 160 file sys/kern/kern_sig.c : 1.219 161 file sys/kern/tty.c : 1.181 162 file sys/net/bpf.c : 1.116 163 file sys/net/zlib.c : 1.26 164 file sys/netccitt/if_x25subr.c : 1.37 165 file sys/netinet/in.c : 1.107 166 file sys/netsmb/smb_smb.c : 1.27 167 file sys/netsmb/smb_trantcp.c : 1.22 168 file sys/nfs/nfs_serv.c : 1.108 169 file sys/nfs/nfs_socket.c : 1.129 170 file sys/nfs/nfs_syscalls.c : 1.91 171 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 172 file usr.bin/ftp/ftp.c : 1.140 173 file usr.bin/find/function.c : 1.54 174 file usr.bin/mail/tty.c : 1.20 175 file usr.bin/msgc/msg_sys.def : 1.33-1.34 176 file usr.bin/nl/nl.c : 1.7 177 file usr.bin/systat/keyboard.c : 1.23 178 file usr.bin/usbhidctl/usbhid.c : 1.29 179 file usr.bin/vi/cl/cl_read.c : 1.5 180 file usr.bin/vi/ex/ex_cscope.c : 1.12 181 file usr.bin/vi/ex/ex_tag.c : 1.19 182 file usr.bin/vi/vi/v_txt.c : 1.15 183 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 184 file usr.sbin/cron/do_command.c : 1.19 185 file usr.sbin/timed/timed/slave.c : 1.15 186 descr 187 GCC 4.1 gets many uninitialised variable warnings wrong. We should 188 really audit all the old hacks like this when older compilers are 189 removed from the tree, as many are probably no longer required. 190 The problem is that it does not recognize initialization via function 191 call pointer. I.e. 192 int p; 193 foo(&p); 194 does not mark p as initialized. 195 kcah 196 197 hack gcc4 pointer sign and strict aliasing problems 198 mdate 10 May 2006 199 who mrg 200 file bin/ed/Makefile : 1.33 201 file distrib/utils/sysinst/Makefile.inc : 1.44 202 file distrib/utils/x_dhclient/Makefile : 1.15 203 file games/bcd/Makefile : 1.5 204 file games/dab/Makefile : 1.5 205 file games/larn/Makefile : 1.17 206 file games/pom/Makefile : 1.5 207 file lib/libasn1/Makefile : 1.26 208 file lib/libcrypt/Makefile : 1.17 209 file lib/libgssapi/Makefile : 1.16 210 file lib/libhdb/Makefile : 1.20 211 file lib/libkadm5clnt/Makefile : 1.21 212 file lib/libkadm5srv/Makefile : 1.25 213 file lib/libkrb5/Makefile : 1.35 214 file lib/libssh/Makefile : 1.6 215 file lib/libtelnet/Makefile : 1.26 216 file libexec/getty/Makefile : 1.14 217 file libexec/kadmind/Makefile : 1.19 218 file libexec/kpasswdd/Makefile : 1.14 219 file sbin/atactl/Makefile : 1.3 220 file sbin/cgdconfig/Makefile : 1.7 221 file sbin/clri/Makefile : 1.13 222 file sbin/dkctl/Makefile : 1.4 223 file sbin/dump/Makefile : 1.33 224 file sbin/fdisk/Makefile : 1.35 225 file sbin/fsck_ext2fs/Makefile : 1.11 226 file sbin/fsck_ffs/Makefile : 1.29 227 file sbin/fsdb/Makefile : 1.18 228 file sbin/mount_smbfs/Makefile : 1.4 229 file sbin/newfs/Makefile : 1.30 230 file sbin/newfs_sysvbfs/Makefile : 1.2 231 file sbin/restore/Makefile : 1.23 232 file sbin/veriexecctl/Makefile : 1.11 233 file sys/lib/libsa/Makefile : 1.59 234 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 235 file usr.bin/awk/Makefile : 1.9 236 file usr.bin/crontab/Makefile : 1.24 237 file usr.bin/ctags/Makefile : 1.8 238 file usr.bin/gzip/Makefile : 1.10 239 file usr.bin/ssh/sftp/Makefile : 1.10 240 file usr.bin/ssh/ssh/Makefile : 1.25 241 file usr.bin/vi/build/Makefile : 1.26 242 file usr.bin/telnet/Makefile : 1.40 243 file usr.bin/tn3270/tn3270/Makefile : 1.36 244 file usr.bin/tr/Makefile : 1.4 245 file usr.sbin/amd/amd/Makefile : 1.27 246 file usr.sbin/amd/amq/Makefile : 1.14 247 file usr.sbin/amd/libamu/Makefile : 1.20 248 file usr.sbin/amd/pawd/Makefile : 1.5 249 file usr.sbin/bind/Makefile.inc : 1.22 250 file usr.sbin/bind/libdns/Makefile : 1.3 251 file usr.sbin/bind/named/Makefile : 1.17 252 file usr.sbin/bootp/bootptest/Makefile : 1.2 253 file usr.sbin/chrtbl/Makefile : 1.6 254 file usr.sbin/cron/Makefile : 1.12 255 file usr.sbin/dhcp/Makefile.inc : 1.20 256 file usr.sbin/hprop/Makefile : 1.13 257 file usr.sbin/installboot/Makefile : 1.35 258 file usr.sbin/ipf/ipftest/Makefile : 1.32 259 file usr.sbin/isdn/isdnd/Makefile : 1.6 260 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 261 file usr.sbin/isdn/isdntel/Makefile : 1.2 262 file usr.sbin/isdn/isdntrace/Makefile : 126 263 file usr.sbin/mopd/common/Makefile : 1.10 264 file usr.sbin/mopd/mopd/Makefile : 1.9 265 file usr.sbin/mopd/mopprobe/Makefile : 1.7 266 file usr.sbin/makefs/Makefile : 1.17 267 file usr.sbin/mscdlabel/Makefile : 1.5 268 file usr.sbin/pkg_install/add/Makefile : 1.7 269 file usr.sbin/pkg_install/create/Makefile : 1.5 270 file usr.sbin/pkg_install/lib/Makefile : 1.28 271 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 272 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 273 file usr.sbin/pppd/Makefile.inc : 1.3 274 file usr.sbin/pppd/pppd/Makefile : 1.38 275 file usr.sbin/rarpd/Makefile : 1.10 276 file usr.sbin/rbootd/Makefile : 1.10 277 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 278 file usr.sbin/tcpdump/Makefile : 1.42 279 descr 280 GCC 4.1 warns on pointer sign comparision/assignments and lots of 281 code does not conform. For now we use -Wno-pointer-sign and 282 -fno-strict-aliasing. 283 kcah 284 285 hack disable ctf for gcc-4.8 build 286 mdate April 3 2014 287 who christos 288 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 289 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 290 descr 291 nbctfconvert -g -L VERSION -g fold-const.o 292 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 293 ((null)) <13532> 294 kcak 295 296 hack emacs aborting on exit (libgcc issue) 297 mdate 7 November 2011 298 who christos 299 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 300 descr 301 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 302 to do just that. If the symbol requested is not found, then it aborts. 303 emacs 23.3 triggers this assertion. For now disable aborting, and 304 silently ignore. 305 kcah 306 307 hack cross-building hack on Darwin 308 mdate 20 July 2008 309 who agc 310 file src/distrib/common/Makefile.mdset : 1.33 311 descr 312 Darwin has problems with getopt() when used in mdsetimage -v, 313 due to the difference between BSD and libiberty() getopt 314 implementations, more fully described in 315 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 316 and the subsequent thread. For just now, we just have an ugly 317 workaround not to call mdsetimage with the -v argument on Darwin 318 kcah 319 320 hack avoid rebuilding asn1 libraries 321 mdate 03 August 2008 322 who veego 323 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 324 file src/lib/libasn1/Makefile : 1.32 325 file src/lib/libhdb/Makefile : 1.23 326 file src/lib/libgssapi/Makefile : 1.20 327 file src/lib/libhx509/Makefile : 1.3 328 pr 9702 39185 329 descr 330 asn1_compile does not check if generated header files do not have to 331 be rebuild. 332 Generate .hx files and copy it in the Makefiles if they changed. 333 kcah 334 335 hack MKPIE ldscript for /usr.sbin/crash 336 cdate 22 April 2010 337 who christos 338 file src/usr.sbin/crash/Makefile : 1.5 339 file src/usr.sbin/crash/ldscript.crash : 1.1 340 pr N/A 341 descr 342 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 343 sections 344 kcah 345 346 hack Disable fortification for /usr/bin/makeinfo 347 cdata 24 Mar 2014 348 who tron 349 file src/gnu/usr.bin/texinfo/makeinfo/Makefile : 1.8 350 pr N/A 351 descr 352 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 353 it fails to process certain texinfo files, e.g. "cl.texi" 354 included in the Emacs 24.3 distribution. 355 kcah 356 357 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 358 cdata 05 Apr 2014 359 who tron 360 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 361 pr N/A 362 descr 363 If "xauth" is compile with "USE_SSP" set to "yes" it fails 364 mysteriously with an error message like this: 365 366 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 367 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 368 369 The compiler seems to get confused about the two filename variables 370 used in the link(2) system call. 371 kcah 372 373 hack g++ 5.x barfs on volatile in constexpr initializers 374 cdata 27 Aug 2015 375 who pooka 376 file src/lib/libpthread/pthread_types.h : 1.17 377 pr lib/49989 378 descr 379 Trying to use e.g. pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER 380 in C++ results in: 381 error: temporary of non-literal type '__pthread_mutex_st' 382 in a constant expression 383 constexpr mutex() _NOEXCEPT : __m_(PTHREAD_MUTEX_INITIALIZER) {} 384 [...] 385 include/pthread_types.h:101:8: note: '__pthread_mutex_st' is 386 not literal because: 387 struct __pthread_mutex_st { 388 ^ 389 include/pthread_types.h:103:17: note: non-static data 390 member '__pthread_mutex_st::ptm_errorcheck' has volatile type 391 pthread_spin_t ptm_errorcheck; 392 kcah 393 394 hack libm cabs{,f,l} and g++ 395 cdata 11 Jan 2016 396 who christos 397 pr lib/50646 398 file src/external/gpl3/gcc.old/dist/libstdc++-v3/include/std/complex : 1.2 399 file src/external/gpl3/gcc/dist/libstdc++-v3/include/std/complex : 1.2 400 descr 401 Our cabs and cabsf have a different argument format on some architectures 402 and for that we have created in libm/compat_cabs{,f}.c. The standard 403 versions in libc are __c99_cabs{,f,l} and there are __RENAME()'s in 404 <complex.h>. G++ uses __builtin_cabs{,f,l} to implement those and they 405 translate by default to cabs{,f,l} which gets defined to cabs{,f} (the 406 wrong function) and an undefined cabsl. I've changed <complex> to use 407 the __c99_cabs{,f,l} directly. Using the __builtin_cabs{,f,l} in gcc is 408 still broken. 409 kcah 410 411 port vax 412 413 hack gcc4/vax ICE 414 cdate 415 who tsutsui 416 file sys/arch/vax/conf/Makefile.vax 417 descr 418 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 419 -fno-tree-ter prevents it so add it to COPTS. 420 kcah 421 422 hack gcc4/vax compiler crash 423 cdate Fri Jun 30 22:39:12 PDT 2006 424 who mrg 425 file bin/csh/Makefile : 1.27 426 file lib/i18n_module/UTF7/Makefile : 1.2 427 descr 428 GCC4 on vax crashes. -O0 stops it happening so far... 429 kcah 430 431 hack declare boolean_t in two IPF user-mode programs 432 cdate Tue Mar 7 19:19:20 CET 2006 433 who he 434 file dist/ipf/ipsend/iptests.c : 1.8 435 dist/ipf/ipsend/sock.c : 1.7 436 descr 437 The IPF user-mode programs ipsend and iptest first 438 include <sys/types.h> without _KERNEL defined, and 439 later include <sys/file.h> with _KERNEL defined. 440 This causes a build failure when building for vax, 441 since <sys/device.h> ends up being included without 442 bollean_t being defined by <sys/types.h>. 443 Build failure and further details documented in 444 PR#32907. 445 kcah 446 447 hack pcc 0.9.9 large string literals 448 cdat 8 July 2008 449 who gmcgarry 450 file sys/conf/param.c : 1.58 451 descr 452 Workaround for pcc 0.9.9 not handling large string literals 453 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 454 fail compilation. 455 There is a proposal on the pcc mailing list to stuff config 456 file in ELF section. 457 kcah 458 459 hack xorg warnings 460 cdat 30 July 2008, 3 June, 2013 461 who mrg 462 file external/mit/xorg/lib/libSM/Makefile : 1.2 463 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 464 external/mit/xorg/lib/libXext/Makefile : 1.2 465 external/mit/xorg/lib/libXfont/Makefile : 1.2 466 descr 467 Disable several warnings or use -Wno-error across Xorg sources 468 while we get them working 469 kcah 470 471 hack 32 bit time leftovers 472 cdat 11 January 2009 473 who christos 474 file lib/libc/time/localtime.c : 1.41 475 lib/libc/time/zic.c : 1.23 476 descr 477 The timezone compiled files still contain 32 bit time_t 478 quantities. I did not want to version the files because 479 the ``parser'' is too ugly for words. What needs to be 480 done, is to rewrite the parser from scratch also to avoid 481 potential core-dumps from parsing invalid files. 482 kcah 483 484 hack 32 bit time leftovers 485 cdat 11 January 2009 486 who christos 487 file various 488 descr 489 Many filesystem on-disk formats have 32 bit times. 490 kcah 491 492 hack gcc 4.5 fsdb miscompile 493 date Sat Nov 9 11:03:02 EST 2013 494 who christos 495 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 496 descr 497 src/sbin/fsdb/fsdb.c: In function 'findblk': 498 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 499 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 500 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 501 (const_int 8 [0x8])) 502 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 503 -1 (nil)) 504 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 505 extract_insn, at recog.c:2103 506 kcah 507 508 hack gcc 4.8 gcc miscompiles 509 date Sat Nov 9 16:35:18 EST 2013 510 who christos 511 file distrib/utils/x_ping/Makefile 512 file distrib/vax/miniroot/Makefile.inc 513 file distrib/vax/ramdisk/Makefile 514 file external/gpl3/gdb/lib/libdecnumber/Makefile 515 file sbin/fsdb/Makefile 516 file sbin/newfs_ext2fs/Makefile 517 file sbin/ping/Makefile 518 file usr.sbin/lmcconfig/Makefile 519 file usr.sbin/mtrace/Makefile 520 descr 521 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 522 internal compiler error: in change_address_1, at emit-rtl.c:2019 523 external/gpl3/gcc/dist/gcc/recog.c:770:1: 524 internal compiler error: in change_address_1, at emit-rtl.c:2019 525 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 526 internal compiler error: in change_address_1, at emit-rtl.c:2019 527 sbin/ping/ping.c:679:1: 528 internal compiler error: in change_address_1, at emit-rtl.c:2019 529 sbin/newfs_ext2fs/mke2fs.c:681:1: 530 internal compiler error: in reload_combine_note_use, 531 at postreload.c:1561 532 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 533 internal compiler error: in change_address_1, at emit-rtl.c:2019 534 usr.sbin/lmcconfig/lmcconfig.c:939:3: 535 internal compiler error: in reload_combine_note_use, 536 at postreload.c:1561 537 usr.sbin/mtrace/mtrace.c:1655:1: 538 internal compiler error: in change_address_1, at emit-rtl.c:2019 539 kcah 540 541 port arm 542 543 hack gcc-unsigned-compare 544 cdate 09 Mar 2002 545 mdate 18 Mar 2002 546 who bjh21 547 file dist/bind/lib/nameser/ns_parse.c : 1.3 548 file dist/dhcp/minires/ns_parse.c : 1.3 549 file dist/dhcp/omapip/result.c : 1.2 550 file dist/dhcp/server/failover.c : 1.3 551 file gnu/dist/toolchain/bfd/bfd.c : 1.2 552 file gnu/dist/toolchain/bfd/format.c : 1.2 553 file gnu/dist/toolchain/gdb/target.c : 1.2 554 file sys/kern/vfs_subr.c : 1.172 555 descr When checking that a potentially-unsigned enum is >= 0, assign 556 it to an int first. This is necessary to avoid "comparison is 557 always true" warnings with -fshort-enums. Casting to an int 558 really should be enough, but turns out not to be. 559 kcah 560 561 hack gcc-4.5 arm CNAME hostname lookup failure on 562 certain DNS environment (probably -ftree-ter problem) 563 cdate Sat Dec 24 04:59:00 UTC 2011 564 mdate 565 who tsutsui 566 file lib/libc/net/Makefile.inc 1.79 567 descr Hostname lookup against CNAMEs by some commands fails 568 on certain DNS environments if lib/libc/net/gethnamaddr.c 569 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 570 are compiled with -O2, even though nslookup(1) against 571 the same CNAME returns proper hostname. 572 They works properly if compiled with -O2 -fno-tree-ter. 573 Also -O2 fails but -O2 -fno-tree-ter works on the following 574 test case in gcc bugzilla: 575 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 576 kcah 577 578 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 579 cdate Wed Nov 14 13:02:02 JST 2012 580 who msaitoh 581 file lib/libc/softfloat/Makefile.inc 582 pr 46953 583 regress src/tests/lib/libm/t_cbrt 584 regress src/tests/lib/libm/t_ceil 585 regress src/tests/lib/libm/t_exp 586 regress src/tests/lib/libm/t_log 587 regress src/tests/lib/libm/t_scalbn 588 regress src/tests/lib/libm/t_sinh 589 regress src/tests/lib/libm/t_sqrt 590 descr Gcc has a bug in tree optimization. For adddf3, 591 -INF + -INF returns 0 without -fno-tree-vrp. 592 Debugging with -fdump-tree-all shows that 593 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 594 is broken. 595 kcah 596 597 port sh3 598 599 hack gcc4-sh3-bz2 600 cdate Sun May 21 03:34:57 UTC 2006 601 mdate Fri May 16 13:13:00 UTC 2008 602 who mrg, tsutsui 603 file lib/libbz2/Makefile : 1.10 604 descr 605 The in-tree GCC 4.1-based compiler generated too-far 606 pc-relative addresses. Hack is to build with 607 -fno-loop-optimize. 608 kcah 609 610 port sh3eb 611 hack gcc4.8.1 612 cdate Thu Nov 7 16:31:23 EST 2013 613 who christos 614 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 615 desrc 616 for profiling 617 compile l2cap_signal.c with -O0 to avoid: 618 ./netbt/l2cap_signal.c:36: 619 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 620 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 621 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 622 impossible reload 623 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 624 kcah 625 626 port sh3el 627 hack gcc4.8.1 628 cdate Fri Nov 8 19:27:01 EST 2013 629 who christos 630 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 631 desrc 632 for profiling 633 compile evdns.c with -O0 to avoid: 634 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 635 impossible reload 636 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 637 kcah 638 639 hack gcc4.8.1 640 cdate Fri Nov 8 19:34:48 EST 2013 641 who christos 642 file src/usr.sbin/racoon/Makefile : 1.27 643 desrc 644 for profiling 645 compile ipsec_doi.c with -O0 to avoid: 646 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 647 impossible reload 648 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 649 kcah 650 651 port m68000 652 653 hack gcc4-m68000 654 cdate Fri Feb 8 10:29:37 PST 2008 655 mdate Sun May 4 15:37:19 UTC 2008 656 who mrg, tsutsui 657 file rescue/Makefile : 1.21 658 file sbin/dump_lfs/Makefile : 1.9 659 file sbin/fsck_ffs/Makefile : 1.35 660 file sbin/fsdb/Makefile : 1.22 661 file share/mk/sys.mk : 1.96 662 file usr.sbin/ndbootd/Makefile : 1.5 663 descr 664 Several internal compiler errors with gcc -O1 665 around 64bit integer arithmetic. 666 This hack uses -O1 and adds some -fno-tree-foo options 667 to avoid the problem. 668 This might be related with GCC Bugzilla Bug 32424. 669 kcah 670 671 port m68k,sh3,vax 672 673 hack gcc-4.8.1 674 cdate Wed Nov 6 20:41:35 EST 2013 675 who christos 676 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 677 descr 678 compile hashtable_c++0x.cc with -O2 instead of -Os to 679 produce missing instantiation of std::lower_bound expansion 680 for unsigned long. 681 kcah 682 683 port sparc 684 685 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 686 cdate Sun Aug 14 19:26:48 PDT 2011 687 who mrg 688 file sys/arch/sparc64/sparc/cpu.c : 1.234 689 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 690 file sys/arch/sparc64/sparc/genassym.cf : 1.67 691 file sys/arch/sparc64/sparc/locore.s : 1.265 692 descr 693 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 694 Post newlock2 there was a bug where a lock was reduced from 695 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 696 would crash due to NULL IPI. This was fixed by re-using the 697 right IPL value. However, GCC 4.5.3 build kernels have the 698 same problems. For now, the hack is re-instated. 699 kcah 700 701 702 port mips 703 704 hack mips-shared-linker-load-address 705 cdate Fri Oct 7 08:33:10 UTC 2005 706 who simonb 707 file src/sys/kern/exec_elf32.c : 1.107 708 descr 709 With COMPAT_16 or previous enabled (which enables 710 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 711 load and run at address 0. The check to fix this in 712 rev 1.107 only checks the first psection of the ELF 713 executable, which may not be loadable. A more correct 714 fix is to check the first loadable psection instead of 715 just the first psection. 716 kcah 717 718 hack mips-duplicate-ras-end-label 719 cdate Sat Sep 2 23:29:42 2006 720 who martin 721 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 722 descr 723 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 724 labels by duplicated __asm output from RAS_END() 725 macro. 726 kcah 727 728 hack mips-mcount-assembler-warning 729 cdate Tue Jul 29 14:16:52 UTC 2008 730 who lukem 731 file src/lib/libc/gmon/Makefile.inc : 1.8 732 descr 733 Workaround for PR port-mips/39192. 734 common/lib/libc/gmon/mcount.c generates a (fatal) 735 assembler warning on MIPS: 736 Warning: No .cprestore pseudo-op used in PIC code 737 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 738 kcah 739 740 port i386 741 742 hack use volatile intermediate variable to enforce rounding 743 cdate Tue Aug 1 22:15:55 MEST 2006 744 who drochner 745 file src/lib/libm/src/lrintf.c : 1.4 746 file src/lib/libm/src/s_rintf.c : 1.8 747 descr 748 gcc-4 does subsequent operations on "float" values within 749 the i387 FPU without rounding the intermediate results 750 kcah 751 752 port x86 753 hack turn off optimization for biosdisk_ll.c because otherwise 754 we are pass the wrong arguments to biosdisk_read(). 755 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 756 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 757 who christos 758 file src/sys/arch/i386/stand/lib/Makefile : 1.38 759 descr 760 Turning on DISK_DEBUG shows the problem. We should find 761 out which option is causing this. 762 hcah 763 764 port powerpc 765 766 hack avoid using __builtin_return_address(0) because it fails in 767 Xorg's module loader 768 cdate Sat Sep 27 03:52:05 UTC 2008 769 who macallan 770 file src/libexec/ld.elf_so/rtld.c : 1.121 771 descr 772 workaround for PR port-macppc/37812 773 kcah 774 775 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 776 building the native compiler via build.sh those don't defined 777 properly. 778 cdate Sat Mar 12 08:00:00 UTC 2011 779 who matt 780 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 781 descr 782 see above 783 kcah 784 785 port powerpc64 786 787 hack include _errno.c in libposix so that __errno resolves. It 788 should resolve from libc's errno, but somehow it does not. 789 Linker bug? 790 cdate Thu Oct 27 13:19:47 EDT 2011 791 who christos 792 file src/lib/libposix/Makefile: 1.15 793 file src/lib/librt/Makefile: 1.14 794 descr 795 workaround for: 796 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 797 R_PPC64_REL24 relocation against symbol `.__errno' 798 kcah 799 800 hack rename data() function in mdocml to avoid redefined error. 801 Compiler/Assembler bug? 802 cdate Sat Oct 29 11:16:01 EDT 2011 803 who christos 804 file src/external/bsd/mdocml/tbl_data.c: 1.2 805 descr 806 workaround for: 807 {standard input}: Assembler messages: 808 {standard input}:105: Error: symbol `.data' is already \ 809 defined 810 kcah 811 812 port emips 813 814 hack Add nop between ctc1 and mtc0 to avoid assembler internal 815 error 816 cdate Sat Oct 29 16:57:34 EDT 2011 817 who christos 818 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 819 descr 820 workaround for: 821 {standard input}: Assembler messages: 822 {standard input}:730: Internal error! 823 Assertion failure in append_insn at /usr/src/external/gpl3/\ 824 binutils/dist/gas/config/tc-mips.c line 2910. 825 kcah 826 827 port ia64 828 829 hack libc hesiod.c file does not compile with -O2 (internal 830 compiler error in gcc 4.5.3) 831 cdate Thu Dec 27 08:05:43 CET 2012 832 who martin 833 file src/lib/libc/net/Makefile.inc: 1.82 834 descr 835 workaround for: 836 {standard input}: Assembler messages: 837 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 838 {standard input}:1506: Warning: This is the location of the conflicting usage 839 {standard input}: Error: 2 warnings, treating warnings as errors 840 kcah 841 842 hack libelf libelf_extended.c compiler error in gcc 4.5.3 843 cdate Thu Dec 27 09:05:51 CET 2012 844 who martin 845 file src/external/bsd/libelf/lib/Makefile: 1.3 846 descr 847 workaround for: 848 {standard input}: Assembler messages: 849 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 850 {standard input}:87: Warning: Only the first path encountering the conflict is reported 851 {standard input}:85: Warning: This is the location of the conflicting usage 852 kcah 853 854 hack compiler error with gcc 4.5.x 855 cdate Thu Dec 27 15:15:25 CET 2012 856 who martin 857 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 858 descr 859 workaround for: 860 {standard input}: Assembler messages: 861 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 862 {standard input}:22978: Warning: This is the location of the conflicting usage 863 kcah 864 865 hack libgcc unwind dummy function 866 cdate Fri Apr 17 14:31:03 CEST 2015 867 who martin 868 file src/external/gpl3/gcc/dist/libgcc/config/ia64/unwind-ia64.c: 1.4 869 descr 870 Add an empty _Unwind_FindTableEntry() implementation. 871 In the end we will use our libc stuff, and this should 872 go away again. 873 kcah 874 875 port x68k 876 877 hack compiler error with gcc 4.5.x 878 cdate Fri May 24 13:23:01 EDT 2013 879 who christos 880 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 881 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 882 descr 883 workaround for: 884 internal compiler error: in cselib_record_set, at cselib.c:1999 885 kcah 886 887 hack fallback to /usr/bin/clang-cpp in rpcgen 888 cdate Wed Jun 5 15:49:27 CEST 2013 889 who joerg 890 file src/usr.bin/rpcgen/rpc_main.c 891 descr 892 It is undecided which compiler owns /usr/bin/cpp and whether it should 893 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 894 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 895 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 896 kcah 897 898 port hppa 899 900 hack compiler error with gcc 4.5.x 901 cdate Tue Jul 23 07:42:28 BST 2013 902 who skrll 903 file src/sys/lib/libkern/Makefile.libkern: 1.26 904 descr 905 workaround for unanalysed codegen bug affecting md5c.c. 906 kcah 907 908 hack gdb vs _rtld_debug_state problem 909 cdate Thu Mar 5 09:49:53 UTC 2015 910 who skrll 911 file src/libexec/ld.elf_so/rtld.c: 1.175 912 descr 913 workaround for problem where gdb misses the breakpoint on 914 _rtld_debug_state when the function is only the 915 bv,n %r0(%rp) instruction - the nullify seems to 916 confuse something 917 kcah 918 919 port mips64* 920 hack compiler crashes on mips64* with optimization enabled 921 cdate Tue May 13 18:46:48 UTC 2014 922 who macallan 923 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 924 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 925 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 926 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 927 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 928 pr 48696 929 kcah 930 931 port vax 932 hack compile boot with -O1 933 cdate Sat May 24 09:40:58 CEST 2014 934 who martin 935 file src/sys/arch/vax/boot/boot/Makefile: 1.41 936 descr /boot does not work when compiled with -O2 and gcc 4.8 937 kcah 938 939 port arm 940 hack avoid using labels in a 12-bit constant. 941 who matt 942 file crypto/external/bsd/openssl/lib/libcrypto/arch/arm/aes-armv4.S: 1.2 943 descr workaround for clang misassembling an instruction 944 kcah 945
Indexes created Wed Nov 05 21:10:10 GMT 2025