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Wilson Snyder 2022-06-02 21:32:22 -04:00
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43
docs/guide/faq.rst
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@ -72,23 +72,38 @@ a good thing for getting working silicon.
Will Verilator output remain under my own license/copyright?
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Yes, it's just like using GCC on your programs; this is why Verilator uses
the "GNU **Lesser** Public License Version 3" instead of the more typical
"GNU Public License". See the licenses for details, but in brief, if you
change Verilator itself or the header files Verilator includes, you must
make the source code available under the GNU Lesser Public License.
However, Verilator output (the Verilated code) only "include"s the licensed
files, and so you are **not** required to open-source release any output
from Verilator.
Your SystemVerilog, VPI/DPI, or main() C++ code remains under your own license.
It's just like how using GCC on your programs does not change the copyright
of your program; this is why Verilator uses the "GNU **Lesser** Public
License Version 3" instead of the more typical "GNU Public License". See
the licenses for details.
Some examples:
* Any SystemVerilog or other input fed into Verilator remain your own.
* Any of your VPI/DPI C++ routines that Verilator calls remain your own.
* Any of your main() C++ code that calls into Verilator remain your own.
* If you change Verilator itself, for example changing or adding a file
under the src/ directory in the repository, you must make the source code
available under the GNU Lesser Public License.
* If you change a header Verilator provides, for example under include/ in
the repository, you must make the source code available under the GNU
Lesser Public License.
You also have the option of using the Perl Artistic License, which again
does not require you to release your Verilog or generated code, and also
allows you to modify Verilator for internal use without distributing the
modified version. But please contribute back to the community!
does not require you to release your Verilog, C++, or generated code. This
license also allows you to modify Verilator for internal use without
distributing the modified version. But please contribute back to the
community!
One limit is that you cannot under either license release a closed-source
Verilog simulation product incorporating Verilator. That is you can have a
commercial product, but must make the source code available.
Under both license you can offer a commercial product that is based on
Verilator either directly or embedded within. However under both licenses,
any changes you make to Verilator for such a product must be open sourced.
As is standard with Open Source, contributions back to Verilator will be
placed under the Verilator copyright and LGPL/Artistic license. Small test

3
docs/spelling.txt
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@ -683,6 +683,7 @@ onehot
ooo
oprofile
oversubscription
parallelized
param
parameterized
params
@ -771,6 +772,7 @@ specparam
splitme
spp
sqrt
src
srcdir
srcfile
sscanf
@ -889,6 +891,7 @@ writeme
writemem
writememb
writememh
xiak
xin
xml
xnor