1 # $NetBSD: HACKS,v 1.110 2008/09/27 03:57:37 macallan Exp $ 2 # 3 # This file is intended to document workarounds for currently unsolved 4 # (mostly) compiler bugs. 5 # 6 # Format: 7 # hack title 8 # cdate creation date 9 # mdate mod date 10 # who responsible developer 11 # port ... 12 # affected ports, space separated, if not "all" 13 # file affected file : revision : line from : line to 14 # affected files and revision and line numbers describing hack 15 # multiple lines if necessary. 16 # pr NNNN ... 17 # problem reports this hack works around, if known. Space 18 # separated. 19 # regress src/regress/directory/where/test/found 20 # regression test directories, if available. 21 # descr 22 # insert short informal description (multi-line). (Longer ones 23 # should be in the PR database. More formal descriptions might 24 # be in the regress tree. See above). 25 # kcah 26 # closing bracket. 27 # 28 # this is a comment. 29 30 hack netstat ieee1394 address printing. 31 mdate 14 Nov 2000 32 who matt 33 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 34 descr 35 Because the current implementation of IP over IEEE1394, the 36 fw device address contains more than just the IEEE1394 EUI-64. 37 So when printing out IEEE1394 addresses, ignore the extra stuff. 38 kcah 39 40 hack xterm vs. libterm 41 mdate 01 Aug 2000 42 who jdc 43 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 44 pr 10383 45 descr 46 In order to extend the termcap string over 1023 bytes, a ZZ entry was 47 introduced to point to a memory location containing the full entry. 48 Without this hack, xterm will export a termcap containing the ZZ 49 entry, which will then be ignored by libterm. As xterm modifies the 50 exported termcap, this would cause those modifications to be ignored. 51 kcah 52 53 hack wi-at-big-endian-bus 54 cdate 15 Mar 2002 55 who martin 56 file dev/ic/wireg.h 57 descr Add an option to access the underlying bus in big endian byte order 58 to work around deficiencies in bus_space_{read,write}_* macros. 59 Those don't allow the implementation of a proper pcmcia bus space 60 tag. 61 kcah 62 63 hack specific knowledge of colours in curses code 64 cdate Sun Apr 6 11:05:24 BST 2003 65 who jdc 66 file lib/libcurses/color.c : r1.24 67 descr 68 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 69 Fix is to enhance libtermcap to understand terminfo-style % sequences. 70 See also: 71 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 72 kcah 73 74 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 75 cdate 21 Aug 2003 76 who he 77 file sys/miscfs/procfs/procfs_linux.c : 1.14 78 descr 79 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 80 literals/constants, but refer to variables of a type which is 81 not "unsigned long", causing compilation of procfs_linux.c to 82 fail with "makes integer from pointer without a cast". This 83 is observed on e.g. the sun3 port. Ideally the "types" for 84 symbols should be consistent across all ports. 85 kcah 86 87 hack gcc-strict-aliasing 88 cdate 6 August 2004 89 who junyoung 90 pr 26516 91 file src/usr.sbin/racoon/racoon/Makefile : 1.21 92 descr 93 GCC issues a warning "dereferencing type-punned pointer will break 94 strict-aliasing rules" when compiling 95 crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this 96 is due to use of type casting in a non-standard way in the code and 97 not a compiler bug. Once a new release of KAME with a proper fix 98 applied is imported this should be backed out. 99 kcah 100 101 hack gcc4 wrong uninitialized variable 102 mdate 10 May 2006 103 who mrg 104 file bin/ksh/eval.c : 1.6 105 file bin/sh/histedit.c : 1.39 106 file bin/sh/parser.c : 1.60 107 file crypto/dist/heimdal/kdc/524.c : 1.10 108 file crypto/dist/ssh/sftp.c : 1.20 109 file crypto/dist/ssh/ssh-keysign.c : 1.11 110 file dist/ipf/lib/hostname.c : 1.2 111 file dist/ipf/tools/ipmon.c : 1.8 112 file dist/ntp/ntpd/ntp_request.c : 1.4 113 file dist/ntp/ntpd/refclock_shm.c : 1.4 114 file dist/ntp/sntp/timing.c : 1.3 115 file dist/pppd/pppstats/pppstats.c : 1.3 116 file dist/smbfs/lib/smb/rap.c : 1.6 117 file dist/tcpdump/print-zephyr.c : 1.5 118 file distrib/utils/sysinst/aout2elf.c : 1.12 119 file gnu/libexec/uucp/uucico/uucico.c : 1.6 120 file lib/libc/citrus/citrus_csmapper.c : 1.6 121 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 122 file lib/libc/inet/inet_cidr_ntop.c : 1.3 123 file lib/libc/inet/inet_ntop.c : 1.3 124 file lib/libc/stdio/vfwprintf.c : 1.8 125 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 126 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 127 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 128 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 129 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 130 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 131 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 132 file sbin/fsck_ext2fs/dir.c : 1.19 133 file sbin/routed/rtquery/rtquery.c : 1.18 134 file sys/arch/amd64/amd64/pmap.c : 1.26 135 file sys/arch/i386/pci/piixpcib.c : 1.4 136 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 137 file sys/crypto/cast128/cast128.c : 1.9 138 file sys/ddb/db_command.c : 1.86 139 file sys/dev/cardbus/cardbus_map.c : 1.21 140 file sys/dev/fss.c : 1.25 141 file sys/dev/ic/igsfb.c : 1.39 142 file sys/dev/ic/mb86950.c : 1.5 143 file sys/dev/ic/midway.c : 1.71 144 file sys/dev/kttcp.c : 1.18 145 file sys/dev/rasops/rasops_bitops.h : 1.9 146 file sys/dev/pci/cmpci.c : 1.31 147 file sys/dev/pci/machfb.c : 1.45 148 file sys/dev/usb/ohci.c : 1.174 149 file sys/dev/usb/uhci.c : 1.196 150 file sys/dev/rasops/rasops_bitops.h : 1.9 151 file sys/dist/ipf/netinet/ip_nat.c : 1.10 152 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 153 file sys/dist/pf/net/pf.c : 1.22 154 file sys/fs/udf/udf_vnops.c : 1.4 155 file sys/kern/kern_sig.c : 1.219 156 file sys/kern/tty.c : 1.181 157 file sys/net/bpf.c : 1.116 158 file sys/net/zlib.c : 1.26 159 file sys/netccitt/if_x25subr.c : 1.37 160 file sys/netinet/in.c : 1.107 161 file sys/netsmb/smb_smb.c : 1.27 162 file sys/netsmb/smb_trantcp.c : 1.22 163 file sys/nfs/nfs_serv.c : 1.108 164 file sys/nfs/nfs_socket.c : 1.129 165 file sys/nfs/nfs_syscalls.c : 1.91 166 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 167 file usr.bin/ftp/ftp.c : 1.140 168 file usr.bin/find/function.c : 1.54 169 file usr.bin/mail/tty.c : 1.20 170 file usr.bin/msgc/msg_sys.def : 1.33-1.34 171 file usr.bin/nl/nl.c : 1.7 172 file usr.bin/systat/keyboard.c : 1.23 173 file usr.bin/usbhidctl/usbhid.c : 1.29 174 file usr.bin/vi/cl/cl_read.c : 1.5 175 file usr.bin/vi/ex/ex_cscope.c : 1.12 176 file usr.bin/vi/ex/ex_tag.c : 1.19 177 file usr.bin/vi/vi/v_txt.c : 1.15 178 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 179 file usr.sbin/cron/do_command.c : 1.19 180 file usr.sbin/timed/timed/slave.c : 1.15 181 descr 182 GCC 4.1 gets many uninitialised variable warnings wrong. We should 183 really audit all the old hacks like this when older compilers are 184 removed from the tree, as many are probably no longer required. 185 The problem is that it does not recognize initialization via function 186 call pointer. I.e. 187 int p; 188 foo(&p); 189 does not mark p as initialized. 190 kcah 191 192 hack gcc4 pointer sign and strict aliasing problems 193 mdate 10 May 2006 194 who mrg 195 file bin/ed/Makefile : 1.33 196 file distrib/utils/sysinst/Makefile.inc : 1.44 197 file distrib/utils/x_dhclient/Makefile : 1.15 198 file games/bcd/Makefile : 1.5 199 file games/dab/Makefile : 1.5 200 file games/larn/Makefile : 1.17 201 file games/pom/Makefile : 1.5 202 file lib/libasn1/Makefile : 1.26 203 file lib/libcrypt/Makefile : 1.17 204 file lib/libgssapi/Makefile : 1.16 205 file lib/libhdb/Makefile : 1.20 206 file lib/libkadm5clnt/Makefile : 1.21 207 file lib/libkadm5srv/Makefile : 1.25 208 file lib/libkrb5/Makefile : 1.35 209 file lib/libssh/Makefile : 1.6 210 file lib/libtelnet/Makefile : 1.26 211 file libexec/getty/Makefile : 1.14 212 file libexec/kadmind/Makefile : 1.19 213 file libexec/kpasswdd/Makefile : 1.14 214 file sbin/atactl/Makefile : 1.3 215 file sbin/cgdconfig/Makefile : 1.7 216 file sbin/clri/Makefile : 1.13 217 file sbin/dkctl/Makefile : 1.4 218 file sbin/dump/Makefile : 1.33 219 file sbin/fdisk/Makefile : 1.35 220 file sbin/fsck_ext2fs/Makefile : 1.11 221 file sbin/fsck_ffs/Makefile : 1.29 222 file sbin/fsdb/Makefile : 1.18 223 file sbin/mount_smbfs/Makefile : 1.4 224 file sbin/newfs/Makefile : 1.30 225 file sbin/newfs_sysvbfs/Makefile : 1.2 226 file sbin/restore/Makefile : 1.23 227 file sbin/veriexecctl/Makefile : 1.11 228 file sys/lib/libsa/Makefile : 1.59 229 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 230 file usr.bin/awk/Makefile : 1.9 231 file usr.bin/crontab/Makefile : 1.24 232 file usr.bin/ctags/Makefile : 1.8 233 file usr.bin/gzip/Makefile : 1.10 234 file usr.bin/ssh/sftp/Makefile : 1.10 235 file usr.bin/ssh/ssh/Makefile : 1.25 236 file usr.bin/vi/build/Makefile : 1.26 237 file usr.bin/telnet/Makefile : 1.40 238 file usr.bin/tn3270/tn3270/Makefile : 1.36 239 file usr.bin/tr/Makefile : 1.4 240 file usr.sbin/amd/amd/Makefile : 1.27 241 file usr.sbin/amd/amq/Makefile : 1.14 242 file usr.sbin/amd/libamu/Makefile : 1.20 243 file usr.sbin/amd/pawd/Makefile : 1.5 244 file usr.sbin/bind/Makefile.inc : 1.22 245 file usr.sbin/bind/libdns/Makefile : 1.3 246 file usr.sbin/bind/named/Makefile : 1.17 247 file usr.sbin/bootp/bootptest/Makefile : 1.2 248 file usr.sbin/chrtbl/Makefile : 1.6 249 file usr.sbin/cron/Makefile : 1.12 250 file usr.sbin/dhcp/Makefile.inc : 1.20 251 file usr.sbin/dumplfs/Makefile : 1.11 252 file usr.sbin/hprop/Makefile : 1.13 253 file usr.sbin/installboot/Makefile : 1.35 254 file usr.sbin/ipf/ipftest/Makefile : 1.32 255 file usr.sbin/isdn/isdnd/Makefile : 1.6 256 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 257 file usr.sbin/isdn/isdntel/Makefile : 1.2 258 file usr.sbin/isdn/isdntrace/Makefile : 126 259 file usr.sbin/mopd/common/Makefile : 1.10 260 file usr.sbin/mopd/mopd/Makefile : 1.9 261 file usr.sbin/mopd/mopprobe/Makefile : 1.7 262 file usr.sbin/makefs/Makefile : 1.17 263 file usr.sbin/mscdlabel/Makefile : 1.5 264 file usr.sbin/pkg_install/add/Makefile : 1.7 265 file usr.sbin/pkg_install/create/Makefile : 1.5 266 file usr.sbin/pkg_install/lib/Makefile : 1.28 267 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 268 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 269 file usr.sbin/pppd/Makefile.inc : 1.3 270 file usr.sbin/pppd/pppd/Makefile : 1.38 271 file usr.sbin/rarpd/Makefile : 1.10 272 file usr.sbin/rbootd/Makefile : 1.10 273 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 274 file usr.sbin/rtadvd/Makefile : 1.9 275 file usr.sbin/tcpdump/Makefile : 1.42 276 file usr.sbin/wiconfig/Makefile : 1.3 277 descr 278 GCC 4.1 warns on pointer sign comparision/assignments and lots of 279 code does not conform. For now we use -Wno-pointer-sign and 280 -fno-strict-aliasing. 281 kcah 282 283 hack cross-building hack on Darwin 284 mdate 20 July 2008 285 who agc 286 file src/distrib/common/Makefile.mdset : 1.33 287 descr 288 Darwin has problems with getopt() when used in mdsetimage -v, 289 due to the difference between BSD and libiberty() getopt 290 implementations, more fully described in 291 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 292 and the subsequent thread. For just now, we just have an ugly 293 workaround not to call mdsetimage with the -v argument on Darwin 294 kcah 295 296 hack avoid rebuilding asn1 libraries 297 mdate 03 August 2008 298 who veego 299 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 300 file src/lib/libasn1/Makefile : 1.32 301 file src/lib/libhdb/Makefile : 1.23 302 file src/lib/libgssapi/Makefile : 1.20 303 file src/lib/libhx509/Makefile : 1.3 304 pr 9702 39185 305 descr 306 asn1_compile does not check if generated header files do not have to 307 be rebuild. 308 Generate .hx files and copy it in the Makefiles if they changed. 309 kcah 310 311 port vax 312 313 hack gcc4/vax ICE 314 cdate 315 who tsutsui 316 file sys/arch/vax/conf/Makefile.vax 317 descr 318 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 319 -fno-tree-ter prevents it so add it to COPTS. 320 kcah 321 322 hack gcc4/vax compiler crash 323 cdate Fri Jun 30 22:39:12 PDT 2006 324 who mrg 325 file bin/csh/Makefile : 1.27 326 file lib/i18n_module/UTF7/Makefile : 1.2 327 descr 328 GCC4 on vax crashes. -O0 stops it happening so far... 329 kcah 330 331 hack gcc 2.95/vax doesn't like abort being used as function pointer 332 cdate Tue Dec 13 05:54:50 GMT 2005 333 who jmc 334 file lib/libc/rpc/svc_vc.c 1.15 335 descr 336 Provide a local definition for abort which doesn't include 337 the noreturn attribute which trips up gcc 2.95 on vax. 338 kcah 339 340 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 341 cdate Mon May 9 12:16:22 CDT 2005 342 who jmc 343 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 344 gnu/usr.bin/gettext/libgrep/Makefile 1.3 345 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 346 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 347 descr 348 The latest gettext assumes a C99 environment or at least 349 configure checks to work around this. As we don't use configure 350 provide a stdbool.h for vax builds locally in directories from 351 the template provided by the gettext code. 352 kcah 353 354 hack gcc 2.95/vax cannot handle __builtin_ffs() 355 cdate Fri Aug 23 21:31:15 CEST 2002 356 who ragge 357 file sys/lib/libkern/libkern.h : 1.42 358 descr 359 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 360 added this feature to GCC 3 so it can be removed when switching. 361 kcah 362 363 hack gcc 2.95/vax libbz2 364 mdate 27 Jun 2002 365 who thorpej 366 file lib/libbz2/Makefile 367 descr 368 libbz2 is mis-compiled with optimization with GCC 2.95.3 369 on VAX. -O0 works around this problem. 370 kcah 371 372 hack vax Toolchain bug 373 cdate 28 Mar 2003 374 who he 375 file sys/arch/vax/vax/intvec.S : 1.5 376 descr 377 Workaround for PR toolchain/20924. The assembler apparently 378 tries to range-check byte offsets when it doesn't have 379 sufficient information to make that decision. 380 Workaround uses `brw' instead of `brb' instruction. 381 kcah 382 383 hack vax gcc 2.95.3 -Wuninitialized workarounds 384 cdate 6 Nov 2003 385 who he 386 file sys/dev/bi/if_ni.c : 1.22 387 file sys/arch/vax/vax/ctu.c : 1.20 388 descr 389 Workaround for gcc 2.95.3 failing to detect that certain 390 variables will be initialized; so that this code compiles 391 with -Wuninitialized. Should be reviewed and possibly 392 reverted when gcc 3.3.2 is ready for vax. 393 kcah 394 395 hack vax gcc 2.95.3 structure initialization 396 cdat 13 May 2004 397 who cl 398 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 399 descr 400 Workaround for gcc 2.95.3 failing to initialize structures 401 and/or unions inside structures using nested designators. 402 Should be reverted when gcc >=3.3.3 is ready for vax. 403 kcah 404 405 hack vax gcc 2.95.3 needs -I. to build nslexer.c 406 cdat 6 Jun 2004 407 who mhitch 408 file lib/libc/arch/vax/Makefile.inc : 1.6 409 descr 410 It appears necessary to add -I. to CPPFLAGS when building 411 nslesxer.c. This may be caused by gcc 2.95.3 being used. 412 Should be reverted when a newer gcc is ready for vax. 413 kcah 414 415 hack vax gcc 2.95.3 doesn't understand "-std=c99" 416 cdat 5 April 2005 417 who tron 418 file src/share/mk/bsd.sys.mk 419 descr 420 We cannot use "-std=c99" for compiler warning level 4 and above 421 because gcc 2.95.3 doesn't support that option. 422 kcah 423 424 hack declare boolean_t in two IPF user-mode programs 425 cdate Tue Mar 7 19:19:20 CET 2006 426 who he 427 file dist/ipf/ipsend/iptests.c : 1.8 428 dist/ipf/ipsend/sock.c : 1.7 429 descr 430 The IPF user-mode programs ipsend and iptest first 431 include <sys/types.h> without _KERNEL defined, and 432 later include <sys/file.h> with _KERNEL defined. 433 This causes a build failure when building for vax, 434 since <sys/device.h> ends up being included without 435 bollean_t being defined by <sys/types.h>. 436 Build failure and further details documented in 437 PR#32907. 438 kcah 439 440 hack pcc 0.9.9 large string literals 441 cdat 8 July 2008 442 who gmcgarry 443 file sys/conf/param.c : 1.58 444 descr 445 Workaround for pcc 0.9.9 not handling large string literals 446 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 447 fail compilation. 448 There is a proposal on the pcc mailing list to stuff config 449 file in ELF section. 450 kcah 451 452 hack xorg warnings 453 cdat 30 July 2008 454 who mrg 455 file external/mit/xorg/lib/libSM/Makefile : 1.2 456 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.2 457 external/mit/xorg/lib/libXext/Makefile : 1.2 458 external/mit/xorg/lib/libXfont/Makefile : 1.2 459 descr 460 Disable several warnings or use -Wno-error across Xorg sources 461 while we get them working 462 kcah 463 464 port arm 465 466 hack gcc-unsigned-compare 467 cdate 09 Mar 2002 468 mdate 18 Mar 2002 469 who bjh21 470 file dist/bind/lib/nameser/ns_parse.c : 1.3 471 file dist/dhcp/minires/ns_parse.c : 1.3 472 file dist/dhcp/omapip/result.c : 1.2 473 file dist/dhcp/server/failover.c : 1.3 474 file gnu/dist/toolchain/bfd/bfd.c : 1.2 475 file gnu/dist/toolchain/bfd/format.c : 1.2 476 file gnu/dist/toolchain/gdb/target.c : 1.2 477 file sys/kern/vfs_subr.c : 1.172 478 descr When checking that a potentially-unsigned enum is >= 0, assign 479 it to an int first. This is necessary to avoid "comparison is 480 always true" warnings with -fshort-enums. Casting to an int 481 really should be enough, but turns out not to be. 482 kcah 483 484 485 port sh3 486 487 hack gcc4-sh3-bz2 488 cdate Sun May 21 03:34:57 UTC 2006 489 mdate Fri May 16 13:13:00 UTC 2008 490 who mrg, tsutsui 491 file lib/libbz2/Makefile : 1.10 492 descr 493 The in-tree GCC 4.1-based compiler generated too-far 494 pc-relative addresses. Hack is to build with 495 -fno-loop-optimize. 496 kcah 497 498 499 port m68000 500 501 hack gcc4-m68000 502 cdate Fri Feb 8 10:29:37 PST 2008 503 mdate Sun May 4 15:37:19 UTC 2008 504 who mrg, tsutsui 505 file rescue/Makefile : 1.21 506 file sbin/dump_lfs/Makefile : 1.9 507 file sbin/fsck_ffs/Makefile : 1.35 508 file sbin/fsdb/Makefile : 1.22 509 file share/mk/sys.mk : 1.96 510 file usr.sbin/ndbootd/Makefile : 1.5 511 descr 512 Several internal compiler errors with gcc -O1 513 around 64bit integer arithmetic. 514 This hack uses -O1 and adds some -fno-tree-foo options 515 to avoid the problem. 516 This might be related with GCC Bugzilla Bug 32424. 517 kcah 518 519 520 port sparc64 521 522 hack disable optimzations for uvm_bio.c on 32 bit kernels 523 cdate Sun Mar 21 14:14:04 MET 2004 524 who martin 525 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 526 file sys/arch/sparc64/conf/files.sparc64 : 1.93 527 descr 528 The sparc compiler miscompiles uvm_bio.c when using 529 any optimization. This results in ubc_release panics. 530 kcah 531 532 port mips 533 534 hack mips-shared-linker-load-address 535 cdate Fri Oct 7 08:33:10 UTC 2005 536 who simonb 537 file src/sys/kern/exec_elf32.c : 1.107 538 descr 539 With COMPAT_16 or previous enabled (which enables 540 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 541 load and run at address 0. The check to fix this in 542 rev 1.107 only checks the first psection of the ELF 543 executable, which may not be loadable. A more correct 544 fix is to check the first loadable psection instead of 545 just the first psection. 546 kcah 547 548 hack mips-duplicate-ras-end-label 549 cdate Sat Sep 2 23:29:42 2006 550 who martin 551 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 552 descr 553 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 554 labels by duplicated __asm output from RAS_END() 555 macro. 556 kcah 557 558 hack mips-mcount-assembler-warning 559 cdate Tue Jul 29 14:16:52 UTC 2008 560 who lukem 561 file src/lib/libc/gmon/Makefile.inc : 1.8 562 descr 563 Workaround for PR port-mips/39192. 564 common/lib/libc/gmon/mcount.c generates a (fatal) 565 assembler warning on MIPS: 566 Warning: No .cprestore pseudo-op used in PIC code 567 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 568 kcah 569 570 port i386 571 572 hack use volatile intermediate variable to enforce rounding 573 cdate Tue Aug 1 22:15:55 MEST 2006 574 who drochner 575 file src/lib/libm/src/lrintf.c : 1.4 576 file src/lib/libm/src/s_rintf.c : 1.8 577 descr 578 gcc-4 does subsequent operations on "float" values within 579 the i387 FPU without rounding the intermediate results 580 kcah 581 582 port powerpc 583 584 hack avoid using __builtin_return_address(0) because it fails in 585 Xorg's module loader 586 cdate Sat Sep 27 03:52:05 UTC 2008 587 who macallan 588 file src/libexec/ld.elf_so/rtld.c : 1.121 589 descr 590 workaround for PR port-macppc/37812 591 kcah 592 593
