Modified: trunk/dports/_resources/port1.0/group/linear_algebra-1.0.tcl (148851 => 148852)

--- trunk/dports/_resources/port1.0/group/linear_algebra-1.0.tcl	2016-05-20 01:11:55 UTC (rev 148851)
+++ trunk/dports/_resources/port1.0/group/linear_algebra-1.0.tcl	2016-05-20 01:12:51 UTC (rev 148852)
@@ -47,7 +47,6 @@
 
 # scalapack.
 # vecLibFort only needed if calling Accelerate from Fortran.
-# enforcing +lapack for OpenBLAS can be optional.
 
 PortGroup active_variants 1.1
 
@@ -92,3 +91,8 @@
     }
     set linalglib           -lopenblas
 }
+
+if {![variant_isset accelerate] && ![variant_isset openblas] && ![variant_isset atlas] } {
+    ui_error "You must select either the +accelerate, +atlas, or +openblas variant for linear algebra."
+    return -code error "No linear-algebra variant selected."
+}