in BTL: a specific bench/action can be selected at runtime, e.g.:

BTL_CONFIG="-a ata" ctest -V -R eigen
  run the all benchmarks having "ata" in their name for all
  libraries matching the regexp "eigen"

bench/btl/libs/C/main.cpp

@@ -28,6 +28,8 @@
 //#include "action_lu_solve.hh"
 #include "timers/mixed_perf_analyzer.hh"
 
+BTL_MAIN;
+
 int main()
 {