X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=base-target-features.lisp-expr;h=22530df0ebe11521a607a3e91205abdd629da397;hb=ad096f09fb631331f584121bfe5ee3bfc7f1f951;hp=8237b15ef5a6c906dfe6bdb0230d544f327f3427;hpb=d6f9676ae94419cb5544c45821a8d31adbc1fbe8;p=sbcl.git

diff --git a/base-target-features.lisp-expr b/base-target-features.lisp-expr
index 8237b15..22530df 100644
--- a/base-target-features.lisp-expr
+++ b/base-target-features.lisp-expr
@@ -122,6 +122,12 @@
  ;; original CMU CL code.)
  ; :sb-show-assem
 
+ ;; Compile the C runtime with support for low-level debugging output
+ ;; through FSHOW and FSHOW_SIGNAL.  If enabled, this feature allows
+ ;; users to turn on such debugging output using environment variables at
+ ;; run-time.
+ ; :sb-qshow
+
  ;; Setting this makes SBCL more "fluid", i.e. more amenable to
  ;; modification at runtime, by suppressing various INLINE declarations,
  ;; compiler macro definitions, FREEZE-TYPE declarations; and by
@@ -317,6 +323,26 @@
  ;; on zlib.
  ; :sb-core-compression
 
+ ;; On certain thread-enabled platforms, synchronization between threads
+ ;; for the purpose of stopping and starting the world around GC can be
+ ;; performed using safepoints instead of signals.  Enable this feature
+ ;; to compile with safepoints and to use them for GC.
+ ;; (Replaces use of SIG_STOP_FOR_GC.)
+ ; :sb-safepoint
+
+ ;; When compiling with safepoints, the INTERRUPT-THREAD mechanism can
+ ;; also use safepoints to roll the target thread to a point at which it
+ ;; can be interrupted safely, instead of using a signal for this
+ ;; purpose.  Enable this feature in addition to :SB-SAFEPOINT to enable
+ ;; such behaviour.
+ ;; (Replaces use of SIGPIPE, except to wake up syscalls.)
+ ; :sb-thruption
+
+ ;; When compiling with safepoints and thruptions, the TIMER facility
+ ;; can replace its use of setitimer with a background thread.
+ ;; (Replaces use of SIGALRM.)
+ ; :sb-wtimer
+
  ;;
  ;; miscellaneous notes on other things which could have special significance
  ;; in the *FEATURES* list