xemacs-beta: PROBLEMS comparison

comparison PROBLEMS @ 845:77624ff6e2da

[xemacs-hg @ 2002-05-16 15:11:22 by stephent] docs <87d6vwrv2k.fsf@tleepslib.sk.tsukuba.ac.jp>

author	stephent
date	Thu, 16 May 2002 15:11:23 +0000
parents	e7ad6587a7a0
children	52c2a7139db0

comparison

equal deleted inserted replaced

-:047d37eb70d7
+:77624ff6e2da
 compatible include files into the compilation.  In particular this
 affected virtually all ioctl() calls.
 ** Linux
-*** Mandrake
+*** XEmacs crashes on startup, in make-frame.
-The Mandrake Linux distribution is attempting to comprehensively
+Typically the Lisp backtrace includes
-update the user interface, and make it consistent across
-applications.  This is very difficult, and will occasionally cause
+make-frame(nil #<x-device on ":0.0" 0x2558>)
-conflicts with applications like Emacs with their own long-established
-interfaces.  Known issues specific to Mandrake or especially common:
+somewhere near the top.  The problem is due to an improvement in GNU
+ld that sorts the ELF reloc sections in the executable, giving
-Some versions of XEmacs (21.1.9 is known) distributed with Mandrake
+dramatic speedups in startup for large executables.  It also confuses
-were patched to make the Meta and Alt keysyms synonymous.  These
+the traditional unexec code in XEmacs, leading to the core dump.  The
-normally work as expected in the Mandrake environment.  However,
+solution is to use the --pdump or --ldflags='-z nocombreloc' options
-custom-built XEmacsen (including all 21.2 betas) will "inexplicably"
+to configure.  Recent 21.4 and 12.5 autodetect this in configure.
-not respect the "Alt-invokes-Meta-commands" convention.  See "I want
-XEmacs to use the Alt key" below.
+Red Hat and SuSE (at least) distributed a prerelease version of ld
+(versions around 2.11.90.x.y) where autodetection is impossible.  The
-The color-gcc wrapper (see below) is in common use on the Mandrake
+recommended procedure is to upgrade to binutils >= 2.12 and rerun
-platform.
+configure.  Otherwise you must apply the flags by hand.  --pdump is
+recommended.
 *** I want XEmacs to use the Alt key, not the XXX key, for Meta commands
 For historical reasons, XEmacs looks for a Meta key, then an Alt key.
 It binds Meta commands to the X11 modifier bit attached to the first
 http://www.geocities.com/kensanata/color-emacs.html#ansicolors
 This is written for the mainline GNU Emacs but the author has made
 efforts to adapt it to XEmacs.  YMMV.
+*** Slow startup on Linux.
+People using systems based on the Linux kernel sometimes report that
+startup takes 10 to 15 seconds longer than `usual'.  There are two
+problems, one older, one newer.
+**** Old problem: IPv4 host lookup
+On older systems, this is because Emacs looks up the host name when it
+starts.  Normally, this takes negligible time; the extra delay is due
+to improper system configuration.  (Recent Linux distros usually have
+this configuration correct "out of the box".)  This problem can occur
+for both networked and non-networked machines.
+Here is how to fix the configuration.  It requires being root.
+***** Networked Case
+First, make sure the files `/etc/hosts' and `/etc/host.conf' both
+exist.  The first line in the `/etc/hosts' file should look like this
+(replace HOSTNAME with your host name):
+127.0.0.1      localhost HOSTNAME
+Also make sure that the `/etc/host.conf' files contains the following
+lines:
+order hosts, bind
+multi on
+Any changes, permanent and temporary, to the host name should be
+indicated in the `/etc/hosts' file, since it acts a limited local
+database of addresses and names (e.g., some SLIP connections
+dynamically allocate ip addresses).
+***** Non-Networked Case
+The solution described in the networked case applies here as well.
+However, if you never intend to network your machine, you can use a
+simpler solution: create an empty `/etc/host.conf' file.  The command
+`touch /etc/host.conf' suffices to create the file.  The `/etc/hosts'
+file is not necessary with this approach.
+**** New problem: IPv6 CNAME lookup
+A newer problem is due to XEmacs changing to use the modern
+getaddrinfo() interface from the older gethostbyname() interface.  The
+solution above is insufficient, because getaddrinfo() by default tries
+to get IPv6 information for localhost.  This always involves a dns
+lookup to get the CNAME, and the strategies above don't work.  It then
+falls back to IPv4 behavior.  This is good[tm] according the people at
+WIDE who know about IPv6.
+***** Robust network case
+Configure your network so that there are no nameservers configured
+until the network is actually running.  getaddrinfo() will not try to
+access a nameserver that isn't configured.
+***** Flaky network case
+If you have a flaky modem or DSL connection that can be relied on only
+to go down whenever you want to bring XEmacs up, you need to force
+IPv4 behavior.  Explicitly setting DISPLAY=127.0.0.1:0.0 (or whatever
+is appropriate) works in most cases.
+If you cannot or do not want to do that, you can hard code IPv4
+behavior in src/process-unix.c.  This is bad[tm], on your own head be
+it.  Use the configure option `--with-ipv6-cname=no'.
+*** Mandrake
+The Mandrake Linux distribution is attempting to comprehensively
+update the user interface, and make it consistent across
+applications.  This is very difficult, and will occasionally cause
+conflicts with applications like Emacs with their own long-established
+interfaces.  Known issues specific to Mandrake or especially common:
+Some versions of XEmacs (21.1.9 is known) distributed with Mandrake
+were patched to make the Meta and Alt keysyms synonymous.  These
+normally work as expected in the Mandrake environment.  However,
+custom-built XEmacsen (including all 21.2 betas) will "inexplicably"
+not respect the "Alt-invokes-Meta-commands" convention.  See "I want
+XEmacs to use the Alt key" below.
+The color-gcc wrapper (see below) is in common use on the Mandrake
+platform.
 *** You get crashes in a non-C locale with Linux GNU Libc 2.0.
 Internationalization was not the top priority for GNU Libc 2.0.
 As of this writing (1998-12-28) you may get crashes while running
 XEmacs in a non-C locale.  For example, `LC_ALL=en_US xemacs' crashes
 character doesn't appear--you get a solid box instead.
 One user on a Linux system reported that this problem went away with
 installation of a new X server.  The failing server was XFree86 3.1.1.
 XFree86 3.1.2 works.
-*** Slow startup on Linux.
-People using systems based on the Linux kernel sometimes report that
-startup takes 10 to 15 seconds longer than `usual'.  There are two
-problems, one older, one newer.
-**** Old problem: IPv4 host lookup
-On older systems, this is because Emacs looks up the host name when it
-starts.  Normally, this takes negligible time; the extra delay is due
-to improper system configuration.  (Recent Linux distros usually have
-this configuration correct "out of the box".)  This problem can occur
-for both networked and non-networked machines.
-Here is how to fix the configuration.  It requires being root.
-***** Networked Case
-First, make sure the files `/etc/hosts' and `/etc/host.conf' both
-exist.  The first line in the `/etc/hosts' file should look like this
-(replace HOSTNAME with your host name):
-127.0.0.1      localhost HOSTNAME
-Also make sure that the `/etc/host.conf' files contains the following
-lines:
-order hosts, bind
-multi on
-Any changes, permanent and temporary, to the host name should be
-indicated in the `/etc/hosts' file, since it acts a limited local
-database of addresses and names (e.g., some SLIP connections
-dynamically allocate ip addresses).
-***** Non-Networked Case
-The solution described in the networked case applies here as well.
-However, if you never intend to network your machine, you can use a
-simpler solution: create an empty `/etc/host.conf' file.  The command
-`touch /etc/host.conf' suffices to create the file.  The `/etc/hosts'
-file is not necessary with this approach.
-**** New problem: IPv6 CNAME lookup
-A newer problem is due to XEmacs changing to use the modern
-getaddrinfo() interface from the older gethostbyname() interface.  The
-solution above is insufficient, because getaddrinfo() by default tries
-to get IPv6 information for localhost.  This always involves a dns
-lookup to get the CNAME, and the strategies above don't work.  It then
-falls back to IPv4 behavior.  This is good[tm] according the people at
-WIDE who know about IPv6.
-***** Robust network case
-Configure your network so that there are no nameservers configured
-until the network is actually running.  getaddrinfo() will not try to
-access a nameserver that isn't configured.
-***** Flaky network case
-If you have a flaky modem or DSL connection that can be relied on only
-to go down whenever you want to bring XEmacs up, you need to force
-IPv4 behavior.  Explicitly setting DISPLAY=127.0.0.1:0.0 (or whatever
-is appropriate) works in most cases.
-If you cannot or do not want to do that, you can hard code IPv4
-behavior in src/process-unix.c.  This is bad[tm], on your own head be
-it.  Use the configure option `--with-ipv6-cname=no'.
 ** IRIX
 *** On Irix, I don't see the toolbar icons and I'm getting lots of
 entries in the warnings buffer.

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