Thanks for the response... I thought of that before but, unfortunately, it didn't change anything.

hostblabla:# echo $LD_LIBRARY_PATH
/tmp/saprfctest/SAP-Rfc-1.55/blib/arch/auto/SAP/Rfc:/usr/sap/rfcsdk
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The make test throws the same error.

undefined symbol: memsetU16 at /usr/lib/perl/5.10/DynaLoader.pm line 1
+96
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This leads me to believe that something is maybe messed up with the Dynaloader module in my perl distribution. But I'm just guessing...