517 lines
16 KiB
Plaintext
517 lines
16 KiB
Plaintext
# $NetBSD: HACKS,v 1.103 2008/05/16 13:16:25 tsutsui Exp $
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#
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# This file is intended to document workarounds for currently unsolved
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# (mostly) compiler bugs.
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#
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# Format:
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# hack title
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# cdate creation date
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# mdate mod date
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# who responsible developer
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# port ...
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# affected ports, space separated, if not "all"
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# file affected file : revision : line from : line to
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# affected files and revision and line numbers describing hack
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# multiple lines if necessary.
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# pr NNNN ...
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# problem reports this hack works around, if known. Space
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# separated.
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# regress src/regress/directory/where/test/found
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# regression test directories, if available.
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# descr
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# insert short informal description (multi-line). (Longer ones
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# should be in the PR database. More formal descriptions might
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# be in the regress tree. See above).
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# kcah
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# closing bracket.
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#
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# this is a comment.
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hack netstat ieee1394 address printing.
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mdate 14 Nov 2000
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who matt
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file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503
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descr
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Because the current implementation of IP over IEEE1394, the
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fw device address contains more than just the IEEE1394 EUI-64.
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So when printing out IEEE1394 addresses, ignore the extra stuff.
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kcah
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hack xterm vs. libterm
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mdate 01 Aug 2000
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who jdc
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file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614
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pr 10383
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descr
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In order to extend the termcap string over 1023 bytes, a ZZ entry was
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introduced to point to a memory location containing the full entry.
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Without this hack, xterm will export a termcap containing the ZZ
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entry, which will then be ignored by libterm. As xterm modifies the
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exported termcap, this would cause those modifications to be ignored.
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kcah
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hack wi-at-big-endian-bus
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cdate 15 Mar 2002
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who martin
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file dev/ic/wireg.h
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descr Add an option to access the underlying bus in big endian byte order
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to work around deficiencies in bus_space_{read,write}_* macros.
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Those don't allow the implementation of a proper pcmcia bus space
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tag.
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kcah
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hack specific knowledge of colours in curses code
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cdate Sun Apr 6 11:05:24 BST 2003
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who jdc
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file lib/libcurses/color.c : r1.24
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descr
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Swap red/blue and yellow/cyan colours for COLOR_OTHER.
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Fix is to enhance libtermcap to understand terminfo-style % sequences.
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See also:
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http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html
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kcah
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hack Compensation for differing types of LINUX_USRSTACK and USRSTACK
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cdate 21 Aug 2003
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who he
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file sys/miscfs/procfs/procfs_linux.c : 1.14
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descr
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Not all ports have LINUX_USRSTACK and/or USRSTACK defined as
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literals/constants, but refer to variables of a type which is
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not "unsigned long", causing compilation of procfs_linux.c to
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fail with "makes integer from pointer without a cast". This
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is observed on e.g. the sun3 port. Ideally the "types" for
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symbols should be consistent across all ports.
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kcah
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hack gcc-strict-aliasing
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cdate 6 August 2004
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who junyoung
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pr 26516
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file src/usr.sbin/racoon/racoon/Makefile : 1.21
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descr
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GCC issues a warning "dereferencing type-punned pointer will break
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strict-aliasing rules" when compiling
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crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this
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is due to use of type casting in a non-standard way in the code and
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not a compiler bug. Once a new release of KAME with a proper fix
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applied is imported this should be backed out.
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kcah
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hack gcc4 wrong uninitialized variable
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mdate 10 May 2006
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who mrg
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file bin/ksh/eval.c : 1.6
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file bin/sh/histedit.c : 1.39
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file bin/sh/parser.c : 1.60
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file crypto/dist/heimdal/kdc/524.c : 1.10
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file crypto/dist/ssh/sftp.c : 1.20
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file crypto/dist/ssh/ssh-keysign.c : 1.11
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file dist/ipf/lib/hostname.c : 1.2
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file dist/ipf/tools/ipmon.c : 1.8
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file dist/ntp/ntpd/ntp_request.c : 1.4
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file dist/ntp/ntpd/refclock_shm.c : 1.4
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file dist/ntp/sntp/timing.c : 1.3
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file dist/pppd/pppstats/pppstats.c : 1.3
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file dist/smbfs/lib/smb/rap.c : 1.6
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file dist/tcpdump/print-zephyr.c : 1.5
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file distrib/utils/sysinst/aout2elf.c : 1.12
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file gnu/libexec/uucp/uucico/uucico.c : 1.6
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file lib/libc/citrus/citrus_csmapper.c : 1.6
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file lib/libc/citrus/citrus_pivot_factory.c : 1.5
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file lib/libc/inet/inet_cidr_ntop.c : 1.3
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file lib/libc/inet/inet_ntop.c : 1.3
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file lib/libc/stdio/vfwprintf.c : 1.8
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file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20
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file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40
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file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22
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file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39
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file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39
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file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21
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file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27
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file sbin/fsck_ext2fs/dir.c : 1.19
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file sbin/routed/rtquery/rtquery.c : 1.18
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file sys/arch/amd64/amd64/pmap.c : 1.26
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file sys/arch/i386/pci/piixpcib.c : 1.4
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file sys/arch/m68k/m68k/pmap_motorola.c : 1.4
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file sys/crypto/cast128/cast128.c : 1.9
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file sys/ddb/db_command.c : 1.86
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file sys/dev/cardbus/cardbus_map.c : 1.21
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file sys/dev/fss.c : 1.25
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file sys/dev/ic/igsfb.c : 1.39
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file sys/dev/ic/mb86950.c : 1.5
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file sys/dev/ic/midway.c : 1.71
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file sys/dev/kttcp.c : 1.18
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file sys/dev/rasops/rasops_bitops.h : 1.9
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file sys/dev/pci/cmpci.c : 1.31
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file sys/dev/pci/machfb.c : 1.45
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file sys/dev/usb/ohci.c : 1.174
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file sys/dev/usb/uhci.c : 1.196
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file sys/dev/rasops/rasops_bitops.h : 1.9
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file sys/dist/ipf/netinet/ip_nat.c : 1.10
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file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8
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file sys/dist/pf/net/pf.c : 1.22
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file sys/fs/udf/udf_vnops.c : 1.4
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file sys/kern/kern_sig.c : 1.219
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file sys/kern/tty.c : 1.181
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file sys/net/bpf.c : 1.116
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file sys/net/zlib.c : 1.26
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file sys/netccitt/if_x25subr.c : 1.37
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file sys/netinet/in.c : 1.107
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file sys/netsmb/smb_smb.c : 1.27
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file sys/netsmb/smb_trantcp.c : 1.22
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file sys/nfs/nfs_serv.c : 1.108
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file sys/nfs/nfs_socket.c : 1.129
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file sys/nfs/nfs_syscalls.c : 1.91
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file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)]
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file usr.bin/ftp/ftp.c : 1.140
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file usr.bin/find/function.c : 1.54
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file usr.bin/mail/tty.c : 1.20
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file usr.bin/msgc/msg_sys.def : 1.33-1.34
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file usr.bin/nl/nl.c : 1.7
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file usr.bin/systat/keyboard.c : 1.23
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file usr.bin/usbhidctl/usbhid.c : 1.29
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file usr.bin/vi/cl/cl_read.c : 1.5
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file usr.bin/vi/ex/ex_cscope.c : 1.12
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file usr.bin/vi/ex/ex_tag.c : 1.19
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file usr.bin/vi/vi/v_txt.c : 1.15
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file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4
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file usr.sbin/cron/do_command.c : 1.19
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file usr.sbin/timed/timed/slave.c : 1.15
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descr
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GCC 4.1 gets many uninitialised variable warnings wrong. We should
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really audit all the old hacks like this when older compilers are
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removed from the tree, as many are probably no longer required.
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The problem is that it does not recognize initialization via function
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call pointer. I.e.
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int p;
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foo(&p);
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does not mark p as initialized.
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kcah
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hack gcc4 pointer sign and strict aliasing problems
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mdate 10 May 2006
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who mrg
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file bin/ed/Makefile : 1.33
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file distrib/utils/sysinst/Makefile.inc : 1.44
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file distrib/utils/x_dhclient/Makefile : 1.15
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file games/bcd/Makefile : 1.5
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file games/dab/Makefile : 1.5
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file games/larn/Makefile : 1.17
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file games/pom/Makefile : 1.5
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file lib/libasn1/Makefile : 1.26
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file lib/libcrypt/Makefile : 1.17
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file lib/libgssapi/Makefile : 1.16
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file lib/libhdb/Makefile : 1.20
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file lib/libkadm5clnt/Makefile : 1.21
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file lib/libkadm5srv/Makefile : 1.25
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file lib/libkrb5/Makefile : 1.35
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file lib/libssh/Makefile : 1.6
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file lib/libtelnet/Makefile : 1.26
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file libexec/getty/Makefile : 1.14
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file libexec/kadmind/Makefile : 1.19
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file libexec/kpasswdd/Makefile : 1.14
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file sbin/atactl/Makefile : 1.3
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file sbin/cgdconfig/Makefile : 1.7
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file sbin/clri/Makefile : 1.13
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file sbin/dkctl/Makefile : 1.4
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file sbin/dump/Makefile : 1.33
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file sbin/fdisk/Makefile : 1.35
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file sbin/fsck_ext2fs/Makefile : 1.11
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file sbin/fsck_ffs/Makefile : 1.29
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file sbin/fsdb/Makefile : 1.18
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file sbin/mount_smbfs/Makefile : 1.4
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file sbin/newfs/Makefile : 1.30
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file sbin/newfs_sysvbfs/Makefile : 1.2
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file sbin/restore/Makefile : 1.23
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file sbin/veriexecctl/Makefile : 1.11
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file sys/lib/libsa/Makefile : 1.59
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file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24
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file usr.bin/awk/Makefile : 1.9
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file usr.bin/crontab/Makefile : 1.24
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file usr.bin/ctags/Makefile : 1.8
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file usr.bin/gzip/Makefile : 1.10
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file usr.bin/ssh/sftp/Makefile : 1.10
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file usr.bin/ssh/ssh/Makefile : 1.25
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file usr.bin/vi/build/Makefile : 1.26
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file usr.bin/telnet/Makefile : 1.40
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file usr.bin/tn3270/tn3270/Makefile : 1.36
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file usr.bin/tr/Makefile : 1.4
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file usr.sbin/amd/amd/Makefile : 1.27
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file usr.sbin/amd/amq/Makefile : 1.14
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file usr.sbin/amd/libamu/Makefile : 1.20
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file usr.sbin/amd/pawd/Makefile : 1.5
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file usr.sbin/bind/Makefile.inc : 1.22
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file usr.sbin/bind/libdns/Makefile : 1.3
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file usr.sbin/bind/named/Makefile : 1.17
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file usr.sbin/bootp/bootptest/Makefile : 1.2
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file usr.sbin/chrtbl/Makefile : 1.6
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file usr.sbin/cron/Makefile : 1.12
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file usr.sbin/dhcp/Makefile.inc : 1.20
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file usr.sbin/dumplfs/Makefile : 1.11
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file usr.sbin/hprop/Makefile : 1.13
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file usr.sbin/installboot/Makefile : 1.35
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file usr.sbin/ipf/ipftest/Makefile : 1.32
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file usr.sbin/isdn/isdnd/Makefile : 1.6
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file usr.sbin/isdn/isdnmonitor/Makefile : 1.3
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file usr.sbin/isdn/isdntel/Makefile : 1.2
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file usr.sbin/isdn/isdntrace/Makefile : 126
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file usr.sbin/mopd/common/Makefile : 1.10
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file usr.sbin/mopd/mopd/Makefile : 1.9
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file usr.sbin/mopd/mopprobe/Makefile : 1.7
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file usr.sbin/makefs/Makefile : 1.17
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file usr.sbin/mscdlabel/Makefile : 1.5
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file usr.sbin/pkg_install/add/Makefile : 1.7
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file usr.sbin/pkg_install/create/Makefile : 1.5
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file usr.sbin/pkg_install/lib/Makefile : 1.28
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file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11
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file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5
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file usr.sbin/pppd/Makefile.inc : 1.3
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file usr.sbin/pppd/pppd/Makefile : 1.38
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file usr.sbin/rarpd/Makefile : 1.10
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file usr.sbin/rbootd/Makefile : 1.10
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file usr.sbin/rpc.pcnfsd/Makefile : 1.17
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file usr.sbin/rtadvd/Makefile : 1.9
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file usr.sbin/tcpdump/Makefile : 1.42
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file usr.sbin/wiconfig/Makefile : 1.3
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descr
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GCC 4.1 warns on pointer sign comparision/assignments and lots of
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code does not conform. For now we use -Wno-pointer-sign and
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-fno-strict-aliasing.
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kcah
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port vax
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hack gcc4/vax ICE
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cdate
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who tsutsui
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file sys/arch/vax/conf/Makefile.vax
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descr
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GCC4 on vax gets ICE on compiling sys/ddb/db_command.c.
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-fno-tree-ter prevents it so add it to COPTS.
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kcah
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hack gcc4/vax compiler crash
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cdate Fri Jun 30 22:39:12 PDT 2006
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who mrg
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file bin/csh/Makefile : 1.27
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file lib/i18n_module/UTF7/Makefile : 1.2
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descr
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GCC4 on vax crashes. -O0 stops it happening so far...
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kcah
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hack gcc 2.95/vax doesn't like abort being used as function pointer
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cdate Tue Dec 13 05:54:50 GMT 2005
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who jmc
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file lib/libc/rpc/svc_vc.c 1.15
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descr
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Provide a local definition for abort which doesn't include
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the noreturn attribute which trips up gcc 2.95 on vax.
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kcah
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hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it
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cdate Mon May 9 12:16:22 CDT 2005
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who jmc
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file gnu/usr.bin/gettext/Makefile.inc.prog 1.5
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gnu/usr.bin/gettext/libgrep/Makefile 1.3
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gnu/usr.bin/gettext/libnlspr/Makefile 1.5
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gnu/usr.bin/gettext/libnlsut/Makefile 1.3
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descr
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The latest gettext assumes a C99 environment or at least
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configure checks to work around this. As we don't use configure
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provide a stdbool.h for vax builds locally in directories from
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the template provided by the gettext code.
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kcah
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hack gcc 2.95/vax cannot handle __builtin_ffs()
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cdate Fri Aug 23 21:31:15 CEST 2002
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who ragge
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file sys/lib/libkern/libkern.h : 1.42
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descr
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__builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has
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added this feature to GCC 3 so it can be removed when switching.
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kcah
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hack gcc 2.95/vax libbz2
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mdate 27 Jun 2002
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who thorpej
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file lib/libbz2/Makefile
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descr
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libbz2 is mis-compiled with optimization with GCC 2.95.3
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on VAX. -O0 works around this problem.
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kcah
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hack vax Toolchain bug
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cdate 28 Mar 2003
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who he
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file sys/arch/vax/vax/intvec.S : 1.5
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descr
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Workaround for PR toolchain/20924. The assembler apparently
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tries to range-check byte offsets when it doesn't have
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sufficient information to make that decision.
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Workaround uses `brw' instead of `brb' instruction.
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kcah
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hack vax gcc 2.95.3 -Wuninitialized workarounds
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cdate 6 Nov 2003
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who he
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file sys/dev/bi/if_ni.c : 1.22
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file sys/arch/vax/vax/ctu.c : 1.20
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descr
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Workaround for gcc 2.95.3 failing to detect that certain
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variables will be initialized; so that this code compiles
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with -Wuninitialized. Should be reviewed and possibly
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reverted when gcc 3.3.2 is ready for vax.
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kcah
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hack vax gcc 2.95.3 structure initialization
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cdat 13 May 2004
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who cl
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file sys/miscfs/kernfs/kernfs_vnops.c : 1.104
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descr
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Workaround for gcc 2.95.3 failing to initialize structures
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and/or unions inside structures using nested designators.
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Should be reverted when gcc >=3.3.3 is ready for vax.
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kcah
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hack vax gcc 2.95.3 needs -I. to build nslexer.c
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cdat 6 Jun 2004
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who mhitch
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file lib/libc/arch/vax/Makefile.inc : 1.6
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descr
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It appears necessary to add -I. to CPPFLAGS when building
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nslesxer.c. This may be caused by gcc 2.95.3 being used.
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Should be reverted when a newer gcc is ready for vax.
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kcah
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hack vax gcc 2.95.3 doesn't understand "-std=c99"
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cdat 5 April 2005
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who tron
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file src/share/mk/bsd.sys.mk
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descr
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We cannot use "-std=c99" for compiler warning level 4 and above
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because gcc 2.95.3 doesn't support that option.
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kcah
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hack declare boolean_t in two IPF user-mode programs
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cdate Tue Mar 7 19:19:20 CET 2006
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who he
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file dist/ipf/ipsend/iptests.c : 1.8
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dist/ipf/ipsend/sock.c : 1.7
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descr
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The IPF user-mode programs ipsend and iptest first
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include <sys/types.h> without _KERNEL defined, and
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later include <sys/file.h> with _KERNEL defined.
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This causes a build failure when building for vax,
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since <sys/device.h> ends up being included without
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bollean_t being defined by <sys/types.h>.
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Build failure and further details documented in
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PR#32907.
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kcah
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port arm
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hack gcc-unsigned-compare
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cdate 09 Mar 2002
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mdate 18 Mar 2002
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who bjh21
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file dist/bind/lib/nameser/ns_parse.c : 1.3
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file dist/dhcp/minires/ns_parse.c : 1.3
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file dist/dhcp/omapip/result.c : 1.2
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file dist/dhcp/server/failover.c : 1.3
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file gnu/dist/toolchain/bfd/bfd.c : 1.2
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file gnu/dist/toolchain/bfd/format.c : 1.2
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file gnu/dist/toolchain/gdb/target.c : 1.2
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file sys/kern/vfs_subr.c : 1.172
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descr When checking that a potentially-unsigned enum is >= 0, assign
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it to an int first. This is necessary to avoid "comparison is
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always true" warnings with -fshort-enums. Casting to an int
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really should be enough, but turns out not to be.
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kcah
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port sh3
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hack gcc4-sh3-bz2
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cdate Sun May 21 03:34:57 UTC 2006
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mdate Fri May 16 13:13:00 UTC 2008
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who mrg, tsutsui
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file lib/libbz2/Makefile : 1.10
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descr
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The in-tree GCC 4.1-based compiler generated too-far
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pc-relative addresses. Hack is to build with
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-fno-loop-optimize.
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kcah
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port m68000
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hack gcc4-m68000
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cdate Fri Feb 8 10:29:37 PST 2008
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mdate Sun May 4 15:37:19 UTC 2008
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who mrg, tsutsui
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file rescue/Makefile : 1.21
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file sbin/dump_lfs/Makefile : 1.9
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file sbin/fsck_ffs/Makefile : 1.35
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file sbin/fsdb/Makefile : 1.22
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file share/mk/sys.mk : 1.96
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file usr.sbin/ndbootd/Makefile : 1.5
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descr
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Several internal compiler errors with gcc -O1
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around 64bit integer arithmetic.
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This hack uses -O1 and adds some -fno-tree-foo options
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to avoid the problem.
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This might be related with GCC Bugzilla Bug 32424.
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kcah
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port sparc64
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hack disable optimzations for uvm_bio.c on 32 bit kernels
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cdate Sun Mar 21 14:14:04 MET 2004
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who martin
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file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54
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file sys/arch/sparc64/conf/files.sparc64 : 1.93
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descr
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The sparc compiler miscompiles uvm_bio.c when using
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any optimization. This results in ubc_release panics.
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kcah
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port mips
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hack mips-shared-linker-load-address
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cdate Fri Oct 7 08:33:10 UTC 2005
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who simonb
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file src/sys/kern/exec_elf32.c : 1.107
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descr
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With COMPAT_16 or previous enabled (which enables
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ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will
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load and run at address 0. The check to fix this in
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rev 1.107 only checks the first psection of the ELF
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executable, which may not be loadable. A more correct
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fix is to check the first loadable psection instead of
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just the first psection.
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kcah
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hack mips-duplicate-ras-end-label
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cdate Sat Sep 2 23:29:42 2006
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who martin
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file src/regress/sys/kern/ras/ras3/Makefile : 1.3
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descr
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Add -fno-reorder-blocks to CFLAGS to avoid duplicate
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labels by duplicated __asm output from RAS_END()
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macro.
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kcah
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port i386
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hack use volatile intermediate variable to enforce rounding
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cdate Tue Aug 1 22:15:55 MEST 2006
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who drochner
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file src/lib/libm/src/lrintf.c : 1.4
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file src/lib/libm/src/s_rintf.c : 1.8
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descr
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gcc-4 does subsequent operations on "float" values within
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the i387 FPU without rounding the intermediate results
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kcah
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