1# $NetBSD: HACKS,v 1.111 2008/11/29 15:31:18 tsutsui 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 30hack netstat ieee1394 address printing. 31mdate 14 Nov 2000 32who matt 33file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 34descr 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. 38kcah 39 40hack xterm vs. libterm 41mdate 01 Aug 2000 42who jdc 43file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 44pr 10383 45descr 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. 51kcah 52 53hack wi-at-big-endian-bus 54cdate 15 Mar 2002 55who martin 56file dev/ic/wireg.h 57descr 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. 61kcah 62 63hack specific knowledge of colours in curses code 64cdate Sun Apr 6 11:05:24 BST 2003 65who jdc 66file lib/libcurses/color.c : r1.24 67descr 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 72kcah 73 74hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 75cdate 21 Aug 2003 76who he 77file sys/miscfs/procfs/procfs_linux.c : 1.14 78descr 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. 85kcah 86 87hack gcc-strict-aliasing 88cdate 6 August 2004 89who junyoung 90pr 26516 91file src/usr.sbin/racoon/racoon/Makefile : 1.21 92descr 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. 99kcah 100 101hack gcc4 wrong uninitialized variable 102mdate 10 May 2006 103who mrg 104file bin/ksh/eval.c : 1.6 105file bin/sh/histedit.c : 1.39 106file bin/sh/parser.c : 1.60 107file crypto/dist/heimdal/kdc/524.c : 1.10 108file crypto/dist/ssh/sftp.c : 1.20 109file crypto/dist/ssh/ssh-keysign.c : 1.11 110file dist/ipf/lib/hostname.c : 1.2 111file dist/ipf/tools/ipmon.c : 1.8 112file dist/ntp/ntpd/ntp_request.c : 1.4 113file dist/ntp/ntpd/refclock_shm.c : 1.4 114file dist/ntp/sntp/timing.c : 1.3 115file dist/pppd/pppstats/pppstats.c : 1.3 116file dist/smbfs/lib/smb/rap.c : 1.6 117file dist/tcpdump/print-zephyr.c : 1.5 118file distrib/utils/sysinst/aout2elf.c : 1.12 119file gnu/libexec/uucp/uucico/uucico.c : 1.6 120file lib/libc/citrus/citrus_csmapper.c : 1.6 121file lib/libc/citrus/citrus_pivot_factory.c : 1.5 122file lib/libc/inet/inet_cidr_ntop.c : 1.3 123file lib/libc/inet/inet_ntop.c : 1.3 124file lib/libc/stdio/vfwprintf.c : 1.8 125file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 126file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 127file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 128file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 129file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 130file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 131file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 132file sbin/fsck_ext2fs/dir.c : 1.19 133file sbin/routed/rtquery/rtquery.c : 1.18 134file sys/arch/amd64/amd64/pmap.c : 1.26 135file sys/arch/i386/pci/piixpcib.c : 1.4 136file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 137file sys/crypto/cast128/cast128.c : 1.9 138file sys/ddb/db_command.c : 1.86 139file sys/dev/cardbus/cardbus_map.c : 1.21 140file sys/dev/fss.c : 1.25 141file sys/dev/ic/igsfb.c : 1.39 142file sys/dev/ic/mb86950.c : 1.5 143file sys/dev/ic/midway.c : 1.71 144file sys/dev/kttcp.c : 1.18 145file sys/dev/rasops/rasops_bitops.h : 1.9 146file sys/dev/pci/cmpci.c : 1.31 147file sys/dev/pci/machfb.c : 1.45 148file sys/dev/usb/ohci.c : 1.174 149file sys/dev/usb/uhci.c : 1.196 150file sys/dev/rasops/rasops_bitops.h : 1.9 151file sys/dist/ipf/netinet/ip_nat.c : 1.10 152file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 153file sys/dist/pf/net/pf.c : 1.22 154file sys/fs/udf/udf_vnops.c : 1.4 155file sys/kern/kern_sig.c : 1.219 156file sys/kern/tty.c : 1.181 157file sys/net/bpf.c : 1.116 158file sys/net/zlib.c : 1.26 159file sys/netccitt/if_x25subr.c : 1.37 160file sys/netinet/in.c : 1.107 161file sys/netsmb/smb_smb.c : 1.27 162file sys/netsmb/smb_trantcp.c : 1.22 163file sys/nfs/nfs_serv.c : 1.108 164file sys/nfs/nfs_socket.c : 1.129 165file sys/nfs/nfs_syscalls.c : 1.91 166file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 167file usr.bin/ftp/ftp.c : 1.140 168file usr.bin/find/function.c : 1.54 169file usr.bin/mail/tty.c : 1.20 170file usr.bin/msgc/msg_sys.def : 1.33-1.34 171file usr.bin/nl/nl.c : 1.7 172file usr.bin/systat/keyboard.c : 1.23 173file usr.bin/usbhidctl/usbhid.c : 1.29 174file usr.bin/vi/cl/cl_read.c : 1.5 175file usr.bin/vi/ex/ex_cscope.c : 1.12 176file usr.bin/vi/ex/ex_tag.c : 1.19 177file usr.bin/vi/vi/v_txt.c : 1.15 178file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 179file usr.sbin/cron/do_command.c : 1.19 180file usr.sbin/timed/timed/slave.c : 1.15 181descr 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. 190kcah 191 192hack gcc4 pointer sign and strict aliasing problems 193mdate 10 May 2006 194who mrg 195file bin/ed/Makefile : 1.33 196file distrib/utils/sysinst/Makefile.inc : 1.44 197file distrib/utils/x_dhclient/Makefile : 1.15 198file games/bcd/Makefile : 1.5 199file games/dab/Makefile : 1.5 200file games/larn/Makefile : 1.17 201file games/pom/Makefile : 1.5 202file lib/libasn1/Makefile : 1.26 203file lib/libcrypt/Makefile : 1.17 204file lib/libgssapi/Makefile : 1.16 205file lib/libhdb/Makefile : 1.20 206file lib/libkadm5clnt/Makefile : 1.21 207file lib/libkadm5srv/Makefile : 1.25 208file lib/libkrb5/Makefile : 1.35 209file lib/libssh/Makefile : 1.6 210file lib/libtelnet/Makefile : 1.26 211file libexec/getty/Makefile : 1.14 212file libexec/kadmind/Makefile : 1.19 213file libexec/kpasswdd/Makefile : 1.14 214file sbin/atactl/Makefile : 1.3 215file sbin/cgdconfig/Makefile : 1.7 216file sbin/clri/Makefile : 1.13 217file sbin/dkctl/Makefile : 1.4 218file sbin/dump/Makefile : 1.33 219file sbin/fdisk/Makefile : 1.35 220file sbin/fsck_ext2fs/Makefile : 1.11 221file sbin/fsck_ffs/Makefile : 1.29 222file sbin/fsdb/Makefile : 1.18 223file sbin/mount_smbfs/Makefile : 1.4 224file sbin/newfs/Makefile : 1.30 225file sbin/newfs_sysvbfs/Makefile : 1.2 226file sbin/restore/Makefile : 1.23 227file sbin/veriexecctl/Makefile : 1.11 228file sys/lib/libsa/Makefile : 1.59 229file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 230file usr.bin/awk/Makefile : 1.9 231file usr.bin/crontab/Makefile : 1.24 232file usr.bin/ctags/Makefile : 1.8 233file usr.bin/gzip/Makefile : 1.10 234file usr.bin/ssh/sftp/Makefile : 1.10 235file usr.bin/ssh/ssh/Makefile : 1.25 236file usr.bin/vi/build/Makefile : 1.26 237file usr.bin/telnet/Makefile : 1.40 238file usr.bin/tn3270/tn3270/Makefile : 1.36 239file usr.bin/tr/Makefile : 1.4 240file usr.sbin/amd/amd/Makefile : 1.27 241file usr.sbin/amd/amq/Makefile : 1.14 242file usr.sbin/amd/libamu/Makefile : 1.20 243file usr.sbin/amd/pawd/Makefile : 1.5 244file usr.sbin/bind/Makefile.inc : 1.22 245file usr.sbin/bind/libdns/Makefile : 1.3 246file usr.sbin/bind/named/Makefile : 1.17 247file usr.sbin/bootp/bootptest/Makefile : 1.2 248file usr.sbin/chrtbl/Makefile : 1.6 249file usr.sbin/cron/Makefile : 1.12 250file usr.sbin/dhcp/Makefile.inc : 1.20 251file usr.sbin/dumplfs/Makefile : 1.11 252file usr.sbin/hprop/Makefile : 1.13 253file usr.sbin/installboot/Makefile : 1.35 254file usr.sbin/ipf/ipftest/Makefile : 1.32 255file usr.sbin/isdn/isdnd/Makefile : 1.6 256file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 257file usr.sbin/isdn/isdntel/Makefile : 1.2 258file usr.sbin/isdn/isdntrace/Makefile : 126 259file usr.sbin/mopd/common/Makefile : 1.10 260file usr.sbin/mopd/mopd/Makefile : 1.9 261file usr.sbin/mopd/mopprobe/Makefile : 1.7 262file usr.sbin/makefs/Makefile : 1.17 263file usr.sbin/mscdlabel/Makefile : 1.5 264file usr.sbin/pkg_install/add/Makefile : 1.7 265file usr.sbin/pkg_install/create/Makefile : 1.5 266file usr.sbin/pkg_install/lib/Makefile : 1.28 267file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 268file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 269file usr.sbin/pppd/Makefile.inc : 1.3 270file usr.sbin/pppd/pppd/Makefile : 1.38 271file usr.sbin/rarpd/Makefile : 1.10 272file usr.sbin/rbootd/Makefile : 1.10 273file usr.sbin/rpc.pcnfsd/Makefile : 1.17 274file usr.sbin/rtadvd/Makefile : 1.9 275file usr.sbin/tcpdump/Makefile : 1.42 276file usr.sbin/wiconfig/Makefile : 1.3 277descr 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. 281kcah 282 283hack cross-building hack on Darwin 284mdate 20 July 2008 285who agc 286file src/distrib/common/Makefile.mdset : 1.33 287descr 288 Darwin has problems with getopt() when used in mdsetimage -v, 289 due to the difference between BSD and libiberty() getopt 290 implementations, more fully described in 291 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 292 and the subsequent thread. For just now, we just have an ugly 293 workaround not to call mdsetimage with the -v argument on Darwin 294kcah 295 296hack avoid rebuilding asn1 libraries 297mdate 03 August 2008 298who veego 299file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 300file src/lib/libasn1/Makefile : 1.32 301file src/lib/libhdb/Makefile : 1.23 302file src/lib/libgssapi/Makefile : 1.20 303file src/lib/libhx509/Makefile : 1.3 304pr 9702 39185 305descr 306 asn1_compile does not check if generated header files do not have to 307 be rebuild. 308 Generate .hx files and copy it in the Makefiles if they changed. 309kcah 310 311hack avoid gcc4 -O1 bug in loop optimize 312cdate 29 November 2008 313who tsutsui 314file src/sbin/ifconfig/Makefile : 1.39 315pr 40036 40066 316descr 317 gcc -O1 seems to generate wrong code in loop optimize so that 318 ifconfig lo0 inet6 doesn't return error even if a kernel 319 doesn't have IPv6 support. (see the above PRs for details) 320 For workaround, specify -fno-loop-optimize on m68000, 321 which uses -O1 by default. 322kcah 323 324port vax 325 326 hack gcc4/vax ICE 327 cdate 328 who tsutsui 329 file sys/arch/vax/conf/Makefile.vax 330 descr 331 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 332 -fno-tree-ter prevents it so add it to COPTS. 333 kcah 334 335 hack gcc4/vax compiler crash 336 cdate Fri Jun 30 22:39:12 PDT 2006 337 who mrg 338 file bin/csh/Makefile : 1.27 339 file lib/i18n_module/UTF7/Makefile : 1.2 340 descr 341 GCC4 on vax crashes. -O0 stops it happening so far... 342 kcah 343 344 hack gcc 2.95/vax doesn't like abort being used as function pointer 345 cdate Tue Dec 13 05:54:50 GMT 2005 346 who jmc 347 file lib/libc/rpc/svc_vc.c 1.15 348 descr 349 Provide a local definition for abort which doesn't include 350 the noreturn attribute which trips up gcc 2.95 on vax. 351 kcah 352 353 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 354 cdate Mon May 9 12:16:22 CDT 2005 355 who jmc 356 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 357 gnu/usr.bin/gettext/libgrep/Makefile 1.3 358 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 359 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 360 descr 361 The latest gettext assumes a C99 environment or at least 362 configure checks to work around this. As we don't use configure 363 provide a stdbool.h for vax builds locally in directories from 364 the template provided by the gettext code. 365 kcah 366 367 hack gcc 2.95/vax cannot handle __builtin_ffs() 368 cdate Fri Aug 23 21:31:15 CEST 2002 369 who ragge 370 file sys/lib/libkern/libkern.h : 1.42 371 descr 372 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 373 added this feature to GCC 3 so it can be removed when switching. 374 kcah 375 376 hack gcc 2.95/vax libbz2 377 mdate 27 Jun 2002 378 who thorpej 379 file lib/libbz2/Makefile 380 descr 381 libbz2 is mis-compiled with optimization with GCC 2.95.3 382 on VAX. -O0 works around this problem. 383 kcah 384 385 hack vax Toolchain bug 386 cdate 28 Mar 2003 387 who he 388 file sys/arch/vax/vax/intvec.S : 1.5 389 descr 390 Workaround for PR toolchain/20924. The assembler apparently 391 tries to range-check byte offsets when it doesn't have 392 sufficient information to make that decision. 393 Workaround uses `brw' instead of `brb' instruction. 394 kcah 395 396 hack vax gcc 2.95.3 -Wuninitialized workarounds 397 cdate 6 Nov 2003 398 who he 399 file sys/dev/bi/if_ni.c : 1.22 400 file sys/arch/vax/vax/ctu.c : 1.20 401 descr 402 Workaround for gcc 2.95.3 failing to detect that certain 403 variables will be initialized; so that this code compiles 404 with -Wuninitialized. Should be reviewed and possibly 405 reverted when gcc 3.3.2 is ready for vax. 406 kcah 407 408 hack vax gcc 2.95.3 structure initialization 409 cdat 13 May 2004 410 who cl 411 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 412 descr 413 Workaround for gcc 2.95.3 failing to initialize structures 414 and/or unions inside structures using nested designators. 415 Should be reverted when gcc >=3.3.3 is ready for vax. 416 kcah 417 418 hack vax gcc 2.95.3 needs -I. to build nslexer.c 419 cdat 6 Jun 2004 420 who mhitch 421 file lib/libc/arch/vax/Makefile.inc : 1.6 422 descr 423 It appears necessary to add -I. to CPPFLAGS when building 424 nslesxer.c. This may be caused by gcc 2.95.3 being used. 425 Should be reverted when a newer gcc is ready for vax. 426 kcah 427 428 hack vax gcc 2.95.3 doesn't understand "-std=c99" 429 cdat 5 April 2005 430 who tron 431 file src/share/mk/bsd.sys.mk 432 descr 433 We cannot use "-std=c99" for compiler warning level 4 and above 434 because gcc 2.95.3 doesn't support that option. 435 kcah 436 437 hack declare boolean_t in two IPF user-mode programs 438 cdate Tue Mar 7 19:19:20 CET 2006 439 who he 440 file dist/ipf/ipsend/iptests.c : 1.8 441 dist/ipf/ipsend/sock.c : 1.7 442 descr 443 The IPF user-mode programs ipsend and iptest first 444 include <sys/types.h> without _KERNEL defined, and 445 later include <sys/file.h> with _KERNEL defined. 446 This causes a build failure when building for vax, 447 since <sys/device.h> ends up being included without 448 bollean_t being defined by <sys/types.h>. 449 Build failure and further details documented in 450 PR#32907. 451 kcah 452 453 hack pcc 0.9.9 large string literals 454 cdat 8 July 2008 455 who gmcgarry 456 file sys/conf/param.c : 1.58 457 descr 458 Workaround for pcc 0.9.9 not handling large string literals 459 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 460 fail compilation. 461 There is a proposal on the pcc mailing list to stuff config 462 file in ELF section. 463 kcah 464 465 hack xorg warnings 466 cdat 30 July 2008 467 who mrg 468 file external/mit/xorg/lib/libSM/Makefile : 1.2 469 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.2 470 external/mit/xorg/lib/libXext/Makefile : 1.2 471 external/mit/xorg/lib/libXfont/Makefile : 1.2 472 descr 473 Disable several warnings or use -Wno-error across Xorg sources 474 while we get them working 475 kcah 476 477port arm 478 479 hack gcc-unsigned-compare 480 cdate 09 Mar 2002 481 mdate 18 Mar 2002 482 who bjh21 483 file dist/bind/lib/nameser/ns_parse.c : 1.3 484 file dist/dhcp/minires/ns_parse.c : 1.3 485 file dist/dhcp/omapip/result.c : 1.2 486 file dist/dhcp/server/failover.c : 1.3 487 file gnu/dist/toolchain/bfd/bfd.c : 1.2 488 file gnu/dist/toolchain/bfd/format.c : 1.2 489 file gnu/dist/toolchain/gdb/target.c : 1.2 490 file sys/kern/vfs_subr.c : 1.172 491 descr When checking that a potentially-unsigned enum is >= 0, assign 492 it to an int first. This is necessary to avoid "comparison is 493 always true" warnings with -fshort-enums. Casting to an int 494 really should be enough, but turns out not to be. 495 kcah 496 497 498port sh3 499 500 hack gcc4-sh3-bz2 501 cdate Sun May 21 03:34:57 UTC 2006 502 mdate Fri May 16 13:13:00 UTC 2008 503 who mrg, tsutsui 504 file lib/libbz2/Makefile : 1.10 505 descr 506 The in-tree GCC 4.1-based compiler generated too-far 507 pc-relative addresses. Hack is to build with 508 -fno-loop-optimize. 509 kcah 510 511 512port m68000 513 514 hack gcc4-m68000 515 cdate Fri Feb 8 10:29:37 PST 2008 516 mdate Sun May 4 15:37:19 UTC 2008 517 who mrg, tsutsui 518 file rescue/Makefile : 1.21 519 file sbin/dump_lfs/Makefile : 1.9 520 file sbin/fsck_ffs/Makefile : 1.35 521 file sbin/fsdb/Makefile : 1.22 522 file share/mk/sys.mk : 1.96 523 file usr.sbin/ndbootd/Makefile : 1.5 524 descr 525 Several internal compiler errors with gcc -O1 526 around 64bit integer arithmetic. 527 This hack uses -O1 and adds some -fno-tree-foo options 528 to avoid the problem. 529 This might be related with GCC Bugzilla Bug 32424. 530 kcah 531 532 533port sparc64 534 535 hack disable optimzations for uvm_bio.c on 32 bit kernels 536 cdate Sun Mar 21 14:14:04 MET 2004 537 who martin 538 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 539 file sys/arch/sparc64/conf/files.sparc64 : 1.93 540 descr 541 The sparc compiler miscompiles uvm_bio.c when using 542 any optimization. This results in ubc_release panics. 543 kcah 544 545port mips 546 547 hack mips-shared-linker-load-address 548 cdate Fri Oct 7 08:33:10 UTC 2005 549 who simonb 550 file src/sys/kern/exec_elf32.c : 1.107 551 descr 552 With COMPAT_16 or previous enabled (which enables 553 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 554 load and run at address 0. The check to fix this in 555 rev 1.107 only checks the first psection of the ELF 556 executable, which may not be loadable. A more correct 557 fix is to check the first loadable psection instead of 558 just the first psection. 559 kcah 560 561 hack mips-duplicate-ras-end-label 562 cdate Sat Sep 2 23:29:42 2006 563 who martin 564 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 565 descr 566 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 567 labels by duplicated __asm output from RAS_END() 568 macro. 569 kcah 570 571 hack mips-mcount-assembler-warning 572 cdate Tue Jul 29 14:16:52 UTC 2008 573 who lukem 574 file src/lib/libc/gmon/Makefile.inc : 1.8 575 descr 576 Workaround for PR port-mips/39192. 577 common/lib/libc/gmon/mcount.c generates a (fatal) 578 assembler warning on MIPS: 579 Warning: No .cprestore pseudo-op used in PIC code 580 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 581 kcah 582 583port i386 584 585 hack use volatile intermediate variable to enforce rounding 586 cdate Tue Aug 1 22:15:55 MEST 2006 587 who drochner 588 file src/lib/libm/src/lrintf.c : 1.4 589 file src/lib/libm/src/s_rintf.c : 1.8 590 descr 591 gcc-4 does subsequent operations on "float" values within 592 the i387 FPU without rounding the intermediate results 593 kcah 594 595port powerpc 596 597 hack avoid using __builtin_return_address(0) because it fails in 598 Xorg's module loader 599 cdate Sat Sep 27 03:52:05 UTC 2008 600 who macallan 601 file src/libexec/ld.elf_so/rtld.c : 1.121 602 descr 603 workaround for PR port-macppc/37812 604 kcah 605 606