===============================
** General
+*** Don't use -O2 with gcc 2.8.1 and egcs 1.0 under SPARC architectures
+without also using `-fno-schedule-insns'.
+
+gcc will generate incorrect code otherwise, typically resulting in
+crashes in the function skip-syntax-backward.
+
*** egcs-1.1
There have been reports of egcs-1.1 not compiling XEmacs correctly on
Alpha Linux. There have also been reports that egcs-1.0.3a is O.K.
-*** Don't use -O2 with gcc 2.7.2 under Intel/XXX without also using
-`-fno-strength-reduce'.
+*** Don't use -O2 or -O3 with Cygwin 1.0, CodeFusion-99070 or gcc 2.7.2 on x86
+without also using `-fno-strength-reduce'.
gcc will generate incorrect code otherwise. This bug is present in at
least 2.6.x and 2.7.[0-2]. This bug has been fixed in GCC 2.7.2.1 and
This problem is known to be fixed in egcs (or pgcc) 1.0 or later.
+Unfortunately, later releases of Cygnus-released compilers (not the
+Net-released ones) have a bug with the same `problem signature'.
+
+If you're lucky, you'll get an error while compiling that looks like:
+
+event-stream.c:3189: internal error--unrecognizable insn:
+(insn 256 14 15 (set (reg/v:SI 24)
+ (minus:SI (reg/v:SI 25)
+ (const_int 2))) -1 (insn_list 11 (nil))
+ (nil))
+ 0 0 [main]
+
+If you're unlucky, your code will simply execute incorrectly.
+
+*** Don't use gcc-2.95.2 with -mcpu=ultrasparc on Solaris 2.6.
+
+gcc will assume a 64-bit operating system, even though you've
+merely told it to assume a 64-bit instruction set.
+
*** Don't use -O2 with gcc 2.7.2 under Intel architectures without also
using `-fno-caller-saves'.
*** On HP-UX, problems with make
-Marcus Thiessel <marcus_thiessel@hp.com>
+Marcus Thiessel <marcus@xemacs.org>
Some releases of XEmacs (e.g. 20.4) require GNU make to build
successfully. You don't need GNU make when building 21.x.
*** On HP-UX 9.05 XEmacs won't compile or coredump during the build.
-Marcus Thiessel <marcus_thiessel@hp.com>
+Marcus Thiessel <marcus@xemacs.org>
This might be a sed problem. For your own safety make sure to use
GNU sed while dumping XEmacs.
-*** On HP-UX 11.0 XEmacs causes excessive X11 errors when running.
+*** On HP-UX 11.0 XEmacs causes excessive X11 errors when running.
+ (also appears on AIX as reported in comp.emacs.xemacs)
-Marcus Thiessel <marcus_thiessel@hp.com>
+Marcus Thiessel <marcus@xemacs.org>
- Unfortunately, XEmacs releases <21.0 don't work with Motif2.1. It
- will compile but you will get excessive X11 errors like
+ Unfortunately, XEmacs releases prior to 21.0 don't work with
+ Motif2.1. It will compile but you will get excessive X11 errors like
xemacs: X Error of failed request: BadGC (invalid GC parameter)
Make sure /usr/lib/Motif1.2_R6/libXm.sl is a link to
/usr/lib/Motif1.2_R6/libXm.3.
+*** On HP-UX 11.0: Object "" does not have windowed ancestor
+
+Marcus Thiessel <marcus@xemacs.org>
+
+ XEmacs dies without core file and reports:
+
+ Error: Object "" does not have windowed ancestor.
+
+ This is a bug. Please apply the patch PHSS_19964 (check if
+ superseded). The other alternative is to link with Motif1.2_R6 (see
+ previous item).
+
+
** SCO OpenServer
*** Native cc on SCO OpenServer 5 is now OK. Icc may still throw you
a curve. Here is what Robert Lipe <robertl@arnet.com> says:
*** You type Control-H (Backspace) expecting to delete characters.
Emacs has traditionally used Control-H for help; unfortunately this
-interferes with its use as Backspace on TTY's. One way to solve this
-problem is to put this in your .emacs:
+interferes with its use as Backspace on TTY's. As of XEmacs 21,
+XEmacs looks at the "erase" setting of TTY structures and maps C-h to
+backspace when erase is set to C-h. This is sort of a special hack,
+but it makes it possible for you to use the standard:
+
+ stty erase ^H
- (when (eq tty-erase-char ?\C-h)
- (keyboard-translate ?\C-h ?\C-?)
- (global-set-key "\M-?" 'help-command))
+to get your backspace key to erase characters. The erase setting is
+recorded in the Lisp variable `tty-erase-char', which you can use to
+tune the settings in your .emacs.
-This checks whether the TTY erase char is C-h, and if it is, makes
-Control-H (Backspace) work sensibly, and moves help to Meta-? (ESC ?).
+A major drawback of this is that when C-h becomes backspace, it no
+longer invokes help. In that case, you need to use f1 for help, or
+bind another key. An example of the latter is the following code,
+which moves help to Meta-? (ESC ?):
-Note that you can probably also access help using F1.
+ (global-set-key "\M-?" 'help-command)
*** Mail agents (VM, Gnus, rmail) cannot get new mail
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