I am having troubles making the pdk within the carvel user project. It fails as follows:

Fetching submodule libraries/sky130_fd_io/latest

Could not access submodule 'third_party/make-env'

Sorry if this a well known issue, but I could not find any help (yet).

Try again in a bit, sometimes it does fail to fetch submodules

It did fetch the submodule, I can see the files. The issue is the access to

third_party/make-env

which I do not understand as it is there.

Recursively delete your pdk directory and try it again

👍 Yes, that fixed it. Thanks! Now the make finished with some (other) errors. Don’t know if this is an issue or not. Need to Google it.

Make should finish clean

Is then following a clean finish or a real error:

make[3]: Leaving directory '/home/martin/os-chip-design/caravel_test_project/pdks/open_pdks/sky130'

make[2]: * [Makefile586 all-a] Error 2 make[2]: Leaving directory ‘/home/martin/os-chip-design/caravel_test_project/pdks/open_pdks/sky130’ make[1]: * [/home/martin/os-chip-design/caravel_test_project/caravel/Makefile1256 build-pdk] Error 2 make[1]: Leaving directory ‘/home/martin/os-chip-design/caravel_test_project’ make: * [Makefile38 pdk] Error 2

Nah that looks bad

Very long, did not find the error (yet). Maybe I’m missing some tools installed?

what version is your magic?

8.3.265 or better is required. https://skywater-pdk.slack.com/archives/C017HPHCMEY/p1643951028174979

Thanks for that tip. I was on an old version and upgraded it. But still the same issue (or similar).

magic version to make the pdk is 8.3.265 and must be native. This is different than the version used for openlane inside docker.

This means building from source, right? I am fighting with it 😉 Building it from source does not find the tcl/tk header files. Building tcl/tk from source, but Intel Quartus has a version installed… I do a full restart with a clean Ubuntu version.

I have a CI job setup here that builds magic as part of the install

OK, I’ll take that as a starting point. Thanks.

Yes docs are lacking atm

I can add two lines.

flow.tcl

is part of openlane. Did you do

make openlane

?

# Install openlane for hardening your project
# make sure to change <directory_name> with the directory you created in step 1
# in this case it is caravel_tutorial
export OPENLANE_ROOT=~/<directory_name>/openlane # you need to export this whenever you start a new shell
make openlane

I think I did. I followed the instructions. However, to be sure I started today from from scratch with a fresh clone of the repo. Now when I want to

make openlane

it complains that openlane already exists:

fatal: destination path '/home/martin/os-chip-design/caravel_test_project/openlane' already exists and is not an empty directory

I am getting a bit desperate 😒

Try

export OPENLANE_ROOT=/home/martin/os-chip-design/openlane

(or some other directory outside

caravel_test_project

. and then

make openlane

I'd

export PDK_ROOT=/home/martin/os-chip-design/pdk

before

make pdk

also. The

openlane

directory in

caravel_test_project

is something totally different.

I can try, but getting confused. In following description it states to point to the openlane (and ptk) folder within the the carvel folder: https://github.com/efabless/caravel_user_project/blob/main/docs/source/roundtrip.rst Maybe I am reading it wrong. I will try, thanks.

It is confusing isn't it. Try this

export BASE_DIR=$PWD

Step 2 was

# Create a directory and call it anything you want
mkdir -p caravel_tutorial

# navigate into the directory
cd caravel_tutorial

Step 3

# Make sure that ``caravel_example`` matches the empty github repo name in step 1
git clone -b mpw-5a <https://github.com/efabless/caravel_user_project> caravel_example
cd caravel_example

So now you're in

$BASE_DIR/caravel_tutorial/caravel_example

Step 4

# Install openlane for hardening your project
# make sure to change <directory_name> with the directory you created in step 1
# in this case it is caravel_tutorial
export OPENLANE_ROOT=~/<directory_name>/openlane # you need to export this whenever you start a new shell
make openlane

# Build the pdk
# make sure to change <directory_name> with the directory you created in step 1
# in this case it is caravel_tutorial

export PDK_ROOT=~/<directory_name>/pdks # you need to export this whenever you start a new shell
make pdk

Actually, it's the directory you created in Step 2 (i.e. in this case

caravel_tutorial

) So you would

export OPENLANE_ROOT=$BASE_DIR/caravel_tutorial/openlane

You could set

export PDK_ROOT=$BASE_DIR/cavarel_tutorial/pdks

And then in

caravel_tutorial

you'd have these 3 directories

caravel_example

this is your local repo

openlane

this is the openlane program directory

pdks/sky130A

this is the pdk directory.

Yes, got it.