When starting xemacs from a command shell, I get the following message "exec: No such file or directory", before Xemacs starts up. Here is my build configuration uname -a: SunOS wadcs01x 5.6 Generic_105181-21 sun4u sparc SUNW,Ultra-5_10 ./configure '--site-includes=/var/tmp/local/include' '--site-libraries=/var/tmp/local/lib' '--prefix=/var/tmp/XEmacs' '--with-sound=all' '--with-pop' '--error-checking=none' XEmacs 21.4.3 "Academic Rigor" configured for `sparc-sun-solaris2.6'. Compilation / Installation: Source code location: /var/tmp/xemacs-21.4.3 Installation prefix: /var/tmp/XEmacs Additional header files: /var/tmp/local/include Additional libraries: /var/tmp/local/lib Runtime library search path: /var/tmp/local/lib:/usr/dt/lib:/usr/openwin/lib:/home/trebuchet/local/lib/gcc-lib/sparc-sun-solaris2.6/2.95.3:/home/trebuchet/local/lib Operating system description file: `s/sol2.h' Machine description file: `m/sparc.h' Compiler: gcc Relocating allocator for buffers: yes GNU version of malloc: yes Window System: Compiling in support for the X window system: - X Windows headers location: /usr/dt/include /usr/openwin/include - X Windows libraries location: /usr/dt/lib /usr/openwin/lib - Handling WM_COMMAND properly. Using Lucid menubars. Using Lucid scrollbars. Using Motif dialog boxes. Using Motif native widgets. TTY: Compiling in support for ncurses. Images: Compiling in support for GIF images (builtin). Compiling in support for XPM images. Compiling in support for PNG images. Compiling in support for JPEG images. Compiling in support for TIFF images. Compiling in support for X-Face message headers. Sound: Compiling in support for sound (native). Compiling in support for NAS (network audio system). Compiling in support for ESD (Enlightened Sound Daemon). Databases: Compiling in support for Berkeley database. Compiling in support for GNU DBM. Internationalization: Mail: Compiling in support for POP mail retrieval. Compiling in support for "dot-locking" mail spool file locking method. Other Features: Compiling in support for ToolTalk. Compiling in support for dynamic shared object modules.

Y> When following form is eval'ed, it signals an error: Y> Wrong type argument: number-char-or-marker-p, a Y> (= 'a) Y> However, if it's byte-compiled, it returns t. Y> (disassemble (byte-compile (lambda () (= 'a)))) Y> shows: Y> byte code: Y> args: nil Y> 0 constant t Y> 1 return Y> Martin? `byte-compile-delete-errors' is a variable declared in Lisp. -- loaded from "bytecomp" Value: t Documentation: *If non-nil, the optimizer may delete forms that may signal an error. This includes variable references and calls to functions such as `car'. There is already this code in byte-plus that optimizes (+ x) ==> x (case elt (0 (when (not byte-compile-delete-errors) (byte-compile-constant 0) (byte-compile-out 'byte-plus 0))) (+1 (byte-compile-out 'byte-add1 0)) (-1 (byte-compile-out 'byte-sub1 0)) (= x) should work the same way. You can also argue that if the argument (or arguments) is/are CONSTANT, then there should be compile-time evaluation. I haven't implemented that in this patch. Index: lisp/ChangeLog =================================================================== RCS file: /usr/CVSroot/XEmacs/xemacs/lisp/ChangeLog,v retrieving revision 1.292 diff -u -w -U0 -r1.292 ChangeLog --- lisp/ChangeLog 2001/05/20 01:17:07 1.292 +++ lisp/ChangeLog 2001/05/20 06:01:49 ＠＠ -0,0 +1,5 ＠＠ +2001-05-20 Martin Buchholz <martin(a)xemacs.org&gt; + + * bytecomp.el (byte-compile-arithcompare): + Only optimize (= x) ==> t if byte-compile-delete-errors is nil. + Index: lisp/bytecomp.el =================================================================== RCS file: /usr/CVSroot/XEmacs/xemacs/lisp/bytecomp.el,v retrieving revision 1.12 diff -u -w -r1.12 bytecomp.el --- lisp/bytecomp.el 2001/05/04 22:41:59 1.12 +++ lisp/bytecomp.el 2001/05/20 06:02:18 ＠＠ -3205,7 +3205,9 ＠＠ (defun byte-compile-arithcompare (form) (case (length (cdr form)) (0 (byte-compile-subr-wrong-args form "1 or more")) - (1 (byte-compile-constant t)) + (1 (if byte-compile-delete-errors + (byte-compile-constant t) + (byte-compile-normal-call form))) (2 (byte-compile-two-args form)) (t (byte-compile-normal-call form))))