Newbie: building arm64-generic (actually, porting to a 64 bit ARM system)

[David Rusling]

I'm new to Gentoo, let alone Chromium OS.  I'm trying to create an overlay for an ARMv8 board and using arm64-generic and veyron as guidelines.   My environment is set up and I can easily build arm-generic, but trying to build my platform or arm64-generic, I get "ERROR: no toolchain specified in board overlay or on command line"

My toolchain.conf references aarch64-cros-linux-gnu (strangely not gnueabi).   Any clues?

Many thanks, Dave

[Mike Frysinger]

you have to use --nousepkg the first time you run setup_board

the toolchain tuple is correct -- aarch64 doesn't have an EABI, so using gnueabi would be strange

-mike

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[David Rusling]

I deleted and started from scratch - it produces the same error when run first time with --nousepkg

[Mike Frysinger]

are you sure your board is in the right place ?  the conf is formatted correctly ?  you're running the right --board for the named overlay ?

i'd suggest starting small from a known working base and going from there.  this works for me:

$ cd ~/chromiumos/src/overlays/

$ cp -a overlay-arm64-generic overlay-foo

$ cros_sdk

$ ./setup_board --board=foo --nousepkg

-mike

[David Rusling]

Mike,

   that gave me the clue I wanted.  it was the ./setup_board --board=foo rather than $export BOARD=foo that did it.   I'm catching my self out with Bash-isms.   That unblocked me for real work, so thanks...

Dave

[Mike Frysinger]

our docs do commonly use examples of `export BOARD=foo`, but that's only so it can later do `./setup_board --board=$BOARD`.  you only need to modify the export line to be able to copy & paste the rest of the examples.  the actual existence of BOARD in the environment has no meaning to any of our tools.

-mike