linux: Enable :SB-FUTEX by default on PPC.

  * Prior to the great de-lutexification, we used futexes on
threaded Linux/PPC.  Not having them enabled on PPC was an
oversight, but one which highlighted some problems with the
non-futex threading code.  Now that that's fixed, we may as
well restore the status quo.

diff --git a/make-config.sh b/make-config.sh
index 3f1bc3f..157eea0 100644 (file)
--- a/make-config.sh
+++ b/make-config.sh
@@ -357,6 +357,9 @@ case "$sbcl_os" in
             x86 | x86-64)
                printf ' :sb-thread :sb-futex :largefile' >> $ltf
                ;;
+            ppc)
+               printf ' :sb-futex' >> $ltf
+               ;;
         esac
 
         if [ $sbcl_arch = "x86-64" ]; then