[51918] trunk/base/src/port1.0/portbuild.tcl

[jmr at macports.org]

Revision: 51918
          http://trac.macports.org/changeset/51918
Author:   jmr at macports.org
Date:     2009-06-06 04:00:02 -0700 (Sat, 06 Jun 2009)
Log Message:
-----------
add a fallback for when the number of CPUs can't be determined via sysctl, and use the recommended hw.availcpu instead of hw.ncpu

Modified Paths:
--------------
    trunk/base/src/port1.0/portbuild.tcl

Modified: trunk/base/src/port1.0/portbuild.tcl
===================================================================
--- trunk/base/src/port1.0/portbuild.tcl	2009-06-06 09:54:24 UTC (rev 51917)
+++ trunk/base/src/port1.0/portbuild.tcl	2009-06-06 11:00:02 UTC (rev 51918)
@@ -131,7 +131,11 @@
     set jobs [option build.jobs]
     # if set to '0', use the number of cores for the number of jobs
     if {$jobs == 0} {
-        set jobs [exec "/usr/sbin/sysctl" "-n" "hw.ncpu"]
+        if {[catch {set jobs [exec "/usr/sbin/sysctl" "-n" "hw.availcpu"]}]} {
+            set jobs 2
+            ui_warn "failed to determine the number of available CPUs (probably not supported on this platform)"
+            ui_warn "defaulting to $jobs jobs, consider setting buildmakejobs to a nonzero value in macports.conf"
+        }
     }
     if {![string is integer -strict $jobs] || $jobs <= 1} {
         return ""
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