X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=base-target-features.lisp-expr;h=22530df0ebe11521a607a3e91205abdd629da397;hb=ad2b04d910cfc097712f19f05af9bb679ee17130;hp=019b37efcf557566e2bcaf737fa6d9bfdab31db8;hpb=7976926f8112b708d5927a69923cf7a3dd003c55;p=sbcl.git

diff --git a/base-target-features.lisp-expr b/base-target-features.lisp-expr
index 019b37e..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
@@ -221,15 +227,12 @@
  ;; x86oid Darwin, FreeBSD, and Solaris.
  ; :sb-thread
 
- ;; lutex support
+ ;; futex support
  ;;
  ;; While on linux we are able to use futexes for our locking
- ;; primitive, on other platforms we don't have this luxury. NJF's
- ;; lutexes present a locking API similar to the futex-based API that
- ;; allows for sb-thread support on x86 OS X, Solaris and
- ;; FreeBSD.
+ ;; primitive, on other platforms we don't have this luxury.
  ;;
- ; :sb-lutex
+ ; :sb-futex
 
  ;; On some operating systems the FS segment register (used for SBCL's
  ;; thread local storage) is not reliably preserved in signal
@@ -320,6 +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