Running Vivado HLS in Cygwin

Question

I have a tcl script to run with Vivado HLS (vivado_hls -f run_vhls.tcl).

When I run it using the built-in Vivado HLS tcl shell, it works all fine. Note: apparently the shell is Cygwin based (as when I do pwd it gives: /cygdrive/c/etc)
When I run the tcl script using the Cygwin shell, it generates all the hls outputs, with two warnings/errors compared to the built-in VHLS shell:
1. At the start of the run:

@I [HLS-10] Running 'C:/Xilinx/Vivado_HLS/2015.2/bin/unwrapped/win64.o/vivado_hls.exe' C:/Xilinx/Vivado_HLS/2015.2/tps/tcl/tcl8.5/tzdata/Europe/London can't be opened. for user 'at3410' on host 'ee-at3410'

There is no "tzdata" folder in the path given.

At the end, when all the hls outputs are generated, says:

@I [WVLOG-307] Generating RTL Verilog for 'CalcSpatConsts'. > @E [HLS-70] There is an error calling 'vivado_hls'; try "-help'. @I [HLS-112] Total elapsed time: 262.13 seconds; peak memory usage: 1.59 GB. @I [LIC-101] Checked in feature [ap_opencl]

I am invoking the vhls command in a makefile

(cd $(dir_impls)/$(tuple) && vivado_hls -f run_vhls.tcl)

and it breaks soon after displaying the messages in No. 2, with the following message:

Makefile:103: recipe for target '/cygdrive/c/path/latency_values.tcl' failed make: *** [/cygdrive/c/path/latency_values.tcl] Error 2

Does anybody know why I see this message only in the Cygwin shell?

What is the problem? How can I fix it?

As all the hls results are generated correctly using the Cygwin shell, is there any way to tell vivad_hls to ignore this error? So that my makefile procedure remains unbroken.

The second error might be a consequence of the first: Vivado_hls records that an error occurred and issues the second as a kind of summary. The first error is probably due to your language settings. Try playing with the LANG, LC_CTYPE... environment variables, maybe. — Renaud Pacalet
Thanks for your comment. How do I do that? In the lists of Environmental variables (both User and System) I have none of the two your mentioned. — AryT

Renaud Pacalet Renaud Pacalet · Accepted Answer · 2015-09-29T12:07:10

If things work with one solution and not the other and if it is due to the environment variables, the best is to print them in both cases and compare:

set fd [open "foo.txt" w]
foreach key [array names ::env] {
  puts $fd "$key: $::env($key)";
}
close $fd

Use foo.txt in one case and bar.txt in the other. Then, in your Cygwin shell:

$ sort foo.txt > foo1.txt
$ sort bar.txt > bar1.txt
$ diff foo1.txt bar1.txt

Once you found which environment variables differ, you can test by setting them in your Cygwin shell before launching vivado_hls:

export VARNAME1=VARVALUE1
export VARNAME2=VARVALUE2
...
vivado_hls -f run_vhls.tcl

If it works adapt your makefile and you will be done.

Running Vivado HLS in Cygwin

1 Answers