X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=base-target-features.lisp-expr;h=7bd7caff6a787a24a4164978c96b3c5a4d71d4e9;hb=883474646eb02d2fc0de5dcf4c63cf7ff794b2eb;hp=770949aba44c91d1b062a1d8d480ac4cac983c11;hpb=49e8403800426f37a54d9b87353a31af36e7af40;p=sbcl.git

diff --git a/base-target-features.lisp-expr b/base-target-features.lisp-expr
index 770949a..7bd7caf 100644
--- a/base-target-features.lisp-expr
+++ b/base-target-features.lisp-expr
@@ -216,12 +216,9 @@
 
  ;; 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
@@ -240,6 +237,11 @@
  ;; 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