X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=base-target-features.lisp-expr;h=8237b15ef5a6c906dfe6bdb0230d544f327f3427;hb=e0aff99a73d836da0dad4602e5559595fbe5ba5c;hp=770949aba44c91d1b062a1d8d480ac4cac983c11;hpb=49e8403800426f37a54d9b87353a31af36e7af40;p=sbcl.git

diff --git a/base-target-features.lisp-expr b/base-target-features.lisp-expr
index 770949a..8237b15 100644
--- a/base-target-features.lisp-expr
+++ b/base-target-features.lisp-expr
@@ -216,23 +216,17 @@
 
  ;; low-level thread primitives support
  ;;
- ;; As of SBCL 0.8, this is only supposed to work in x86 Linux with
- ;; NPTL support (usually kernel 2.6, though sme Red Hat distributions
- ;; with older kernels also have it) and is implemented using clone(2)
- ;; and the %fs segment register.  Note that no consistent effort to
- ;; audit the SBCL library code for thread safety has been performed,
- ;; so caveat executor.
+ ;; As of SBCL 1.0.33.26, threads are part of the default build on
+ ;; x86oid Linux. Other platforms that support them include
+ ;; 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
@@ -240,6 +234,11 @@
  ;; local storage.
  ; :restore-tls-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
+ ;; which generates SIGILL instead.
+ ; :ud2-breakpoints
+
  ;; Support for detection of unportable code (when applied to the
  ;; COMMON-LISP package, or SBCL-internal pacakges) or bad-neighbourly
  ;; code (when applied to user-level packages), relating to material
@@ -307,6 +306,17 @@
  ;; foreign code that uses a 32-bit off_t.
  ; :largefile
 
+ ;; Enabled automatically on platforms that have VOPs to compute the
+ ;; high half of a full word-by-word multiplication.  When disabled,
+ ;; SB-KERNEL:%MULTIPLY-HIGH is implemented in terms of
+ ;; SB-BIGNUM:%MULTIPLY.
+ ; :multiply-high-vops
+
+ ;; SBCL has optional support for zlib-based compressed core files.  Enable
+ ;; this feature to compile it in.  Obviously, doing so adds a dependency
+ ;; on zlib.
+ ; :sb-core-compression
+
  ;;
  ;; miscellaneous notes on other things which could have special significance
  ;; in the *FEATURES* list
@@ -388,6 +398,10 @@
  ;;   :compare-and-swap-vops
  ;;     The backend implements compare-and-swap VOPs.
  ;;
+ ;;   :memory-barrier-vops
+ ;;     Memory barriers (for multi-threaded synchronization) have been
+ ;;     implemented for this platform.
+ ;;
  ;; operating system features:
  ;;   :unix    = We're intended to run under some Unix-like OS. (This is not
  ;;              exclusive with the features which indicate which particular