X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=base-target-features.lisp-expr;h=9ba7b4d90c565bde12416f1cbf88bb78a3f1c3ee;hb=43c6634142a96e1d1bab2efe1a39cd8234903c41;hp=f67012390cb616da80a045a1c412131dada6c7e6;hpb=8cef5fe251da467da6aceafc39a7463627a7033e;p=sbcl.git

diff --git a/base-target-features.lisp-expr b/base-target-features.lisp-expr
index f670123..9ba7b4d 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
@@ -232,7 +238,7 @@
  ;; thread local storage) is not reliably preserved in signal
  ;; handlers, so we need to restore its value from the pthread thread
  ;; local storage.
- ; :restore-tls-segment-register-from-tls
+ ; :restore-fs-segment-register-from-tls
 
  ;; On some x86oid operating systems (darwin) SIGTRAP is not reliably
  ;; delivered for the INT3 instruction, so we use the UD2 instruction
@@ -321,6 +327,7 @@
  ;; 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
@@ -328,8 +335,14 @@
  ;; 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