Compiler Error: Unrecognized function call: in OpenCL compilation with custom RTL code with Cyclone V Soc BSP - Compiler Error: Unrecognized function call: in OpenCL compilation with custom RTL code with Cyclone V Soc BSP Description Due to a problem in the Quartus® Prime software and Intel® FPGA SDK for OpenCL™ version 14.1 and later for Cyclone V SoC platform, when integrating a custom RTL module into the OpenCL design, compile may fail with Cyclone® V SoC platform only for error below:- Compiler Error: Unrecognized function call: acl.external.iowr.i1.si32.p4si32 Resolution This problem has been fixed in the Quartus® Prime software and Intel® FPGA SDK for OpenCL™ version 17.0 for the Cyclone V SoC platform. As a workaround, user can open up the cyclonev_tsm.xml file and add in the code below, this code is also available in the Stratix® V platform.  <group acl_intrinsic="acl.external.iord"> <type base="any"> <style name="default"> <max-latency value="1"/> <min-capacity value="1"/> </style> </type> </group>  <group acl_intrinsic="acl.external.iowr"> <type base="any"> <style name="default"> <max-latency value="1"/> <min-capacity value="1"/> </style> </type> </group> Custom Fields values: ['novalue'] Troubleshooting FB: 403727; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 17.0 14.1 ['Cyclone® V SE FPGA', 'Cyclone® V ST FPGA', 'Cyclone® V SX FPGA'] ['novalue'] ['novalue'] ['novalue']