[30739] trunk/base/src/port1.0/portbuild.tcl

[source_changes at macosforge.org]

Revision: 30739
          http://trac.macosforge.org/projects/macports/changeset/30739
Author:   mww at macports.org
Date:     2007-11-05 13:45:27 -0800 (Mon, 05 Nov 2007)

Log Message:
-----------
try to determine the number of cores for number of parallel build jobs (if those are set to '0')

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

Modified: trunk/base/src/port1.0/portbuild.tcl
===================================================================
--- trunk/base/src/port1.0/portbuild.tcl	2007-11-05 21:02:40 UTC (rev 30738)
+++ trunk/base/src/port1.0/portbuild.tcl	2007-11-05 21:45:27 UTC (rev 30739)
@@ -122,6 +122,10 @@
 	return ""
     }
     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 {![string is integer -strict $jobs] || $jobs <= 1} {
 	return ""
     }

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