Xilinx SDK Hello World Build Errors

Cannot find libz.so.1

Got an error in the Xilinx SDK where the error message was that the arm gcc compiler was missing libz.so.1

Not sure if this will help but I tried installing the 32-bit libz library

apt-get install zlib1g:i386

Cannot find -lxil

Seems like somebody else had a problem here

And the third message had the answer:

I wasn’t able to solve it. It was a simple project, so I just remade it and it worked.

So I cleaned the build and remade it.

Vivado HLS (2016.02) co-simulation build error on Ubuntu 14.04 (crti.o not found)

Vivado HLS 2016.02 has an error when building binary files (for co-simulation) on Ubuntu 14.04. (Don’t know about other distributions, or other versions of Ubuntu)

I got my help from this blog post.

The problem I got was as follows:

INFO: [HLS 200-10] In directory '/home/username/Vivado_HLS_projects/XorGenerator/XorGenerator/sim/wrapc'
clang: warning: argument unused during compilation: '-fno-builtin-isinf'
clang: warning: argument unused during compilation: '-fno-builtin-isnan'
INFO: [APCC 202-3] Tmp directory is /tmp/apcc_db_username/160961476017075859177
INFO: [APCC 202-1] APCC is done.
Generating cosim.tv.exe
In file included from apatb_do_xor.cpp:18:0:
/opt/Xilinx/Vivado_HLS/2016.2/include/ap_stream.h:70:2: warning: #warning AP_STREAM macros are deprecated. Please use hls::stream<> from "hls_stream.h" instead. [-Wcpp]
/usr/bin/ld: cannot find crt1.o: No such file or directory
/usr/bin/ld: cannot find crti.o: No such file or directory

So the problem was that crt1.o and crti.o are note found. Just to give you a hint, these files are under /usr/lib/x86_64-linux_gnu

However instead of adding that directory as the build path or Library path (which I think is the intuition and the right way to do it…) The workaround in the blog post is to copy the crti.o, crt1.o, and crtn.o file to the Vivado HLS's gcc directories.

The path has changed since Vivado HLS 2012.02 as in the post.

Now the path is at /opt/Xilinx/Vivado_HLS/2016.2/lnx64/tools/gcc/lib/gcc/x86_64-unknown-linux-gnu/4.6.3/

Thus you will want to execute the following command:

cp /usr/lib/x86_64-linux-gnu/crt?.o /opt/Xilinx/Vivado_HLS/2016.2/lnx64/tools/gcc/lib/gcc/x86_64-unknown-linux-gnu/4.6.3/

Cheers 🙂

Zedboard Block RAM Size

The Zedboard’s device name is Z-7020; and if we take a look at the data sheet of the Zynq-7000, we can find that the Block RAM size is 4.9Mb, or 140 x 36Kb blocks of BRAM.

FIFO can be used as a bridge between the PS and PL, as either will have different frequencies. To prevent data loss, the FIFO is used as a shared buffer as a synchronization circuit. (Ref)