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No files cached by aoc (Intel FPGA OpenCL compiler) even with AOCL_TMP_DIR set

I'm trying to shorten the compilation process by setting the AOCL_TMP_DIR to a folder in my home directory which I have write access too. But even after running OpenCL compilations multiple times with and without the -fast-compile flag, the folder still remains empty and the compilation takes as long as ever. (Reference Section 7.22 in the Programming Guide here https://www.intel.com/content/www/us/en/programmable/documentation/mwh1391807965224.html)

The compilation does print out this but nothing in it still.

 

AOCL_TMP_DIR directory was specified at <dir>.
Ensure Linux and Windows compiles do not share the same directory as files may be incompatible.
aoc: Cached files in <dir> may be used to reduce compilation time

 

 

I'm using the Arria 10 PAC devstack with Quartus 19.2 same as the DevCloud Arria 10 1.2.1 nodes.

It says here: https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/embedd... that is was corrected in 19.1 but looks like it isn't.

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