X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=base-target-features.lisp-expr;h=93066ab4c4cb331a526cf420891f26879157c2c1;hb=c43e3ee7e99bf8116402c2e6a90320b2e92b391b;hp=a35169321e138cda2d830242f169f490ca19c51c;hpb=402958f92506b9d3de852601b8c1ccb99b5ee558;p=sbcl.git

diff --git a/base-target-features.lisp-expr b/base-target-features.lisp-expr
index a351693..93066ab 100644
--- a/base-target-features.lisp-expr
+++ b/base-target-features.lisp-expr
@@ -7,10 +7,13 @@
 ;;;;
 ;;;; Note that the recommended way to customize the features of a
 ;;;; local build of SBCL is not to edit this file, but instead to
-;;;; tweak customize-target-features.lisp. If you define a function
-;;;; in customize-target-features.lisp, it will be used to transform
-;;;; the target features list after it's read and before it's used.
-;;;; E.g. you can use code like this:
+;;;; tweak customize-target-features.lisp. (You must create this file
+;;;; first; it is not in the SBCL distribution, and is in fact
+;;;; explicitly excluded from the distribution in places like
+;;;; .cvsignore.) If you define a function in
+;;;; customize-target-features.lisp, it will be used to transform the
+;;;; target features list after it's read and before it's used. E.g.,
+;;;; you can use code like this:
 ;;;;    (lambda (list)
 ;;;;      (flet ((enable (x) (pushnew x list))
 ;;;;             (disable (x) (setf list (remove x list))))
@@ -107,11 +110,13 @@
  ;; readtable configured so that the system sources can be read.
  ; :sb-show
 
- ;; Build SBCL with the old CMU CL low level debugger, "ldb". If are
- ;; aren't messing with SBCL at a very low level (e.g., trying to
- ;; diagnose GC problems, or trying to debug assembly code for a port
- ;; to a new CPU) you shouldn't need this.
- ; :sb-ldb
+ ;; Build SBCL with the old CMU CL low level debugger, "ldb". In the
+ ;; ideal world you would not need this unless you are messing with
+ ;; SBCL at a very low level (e.g., trying to diagnose GC problems, or
+ ;; trying to debug assembly code for a port to a new CPU). However,
+ ;; experience shows that sooner or later everyone lose()'s, in which
+ ;; case SB-LDB can at least provide an informative backtrace.
+ :sb-ldb
 
  ;; This isn't really a target Lisp feature at all, but controls
  ;; whether the build process produces an after-xc.core file. This
@@ -189,6 +194,11 @@
  ;; character set.
  :sb-unicode
 
+ ;; Support for a full evaluator that can execute all the CL special
+ ;; forms, as opposed to the traditional SBCL evaluator which called
+ ;; COMPILE for everything complicated.
+ :sb-eval
+
  ;; Record source location information for variables, classes, conditions,
  ;; packages, etc. Gives much better information on M-. in Slime, but
  ;; increases core size by about 100kB.
@@ -224,6 +234,16 @@
  ;; again, if anyone's sufficiently motivated.
  ; :long-float
 
+ ;; Some platforms don't use a 32-bit off_t by default, and thus can't
+ ;; handle files larger than 2GB. This feature will control whether
+ ;; we'll try to use platform-specific compilation options to enable a
+ ;; 64-bit off_t. The intent is for this feature to be automatically
+ ;; enabled by make-config.sh on platforms where it's needed and known
+ ;; to work, you shouldn't be enabling it manually. You might however
+ ;; want to disable it, if you need to pass file descriptors to
+ ;; foreign code that uses a 32-bit off_t.
+ ; :largefile
+
  ;;
  ;; miscellaneous notes on other things which could have special significance
  ;; in the *FEATURES* list