Build error on Ubuntu 20.10

[Richard]

I"m getting the following error when building on Ubuntu 20.10:

ERROR at //build/config/sysroot.gni:65:11: Script returned non-zero exit code.

exec_script("//build/dir_exists.py",

^----------

Current dir: /current/dir/

Command: python /home/dir/v8/v8/build/dir_exists.py /home/dir/v8/v8/build/linux/debian_sid_amd64-sysroot

Returned 127.

See //build/toolchain/linux/BUILD.gn:6:1: whence it was imported.

import("//build/config/sysroot.gni")

^----------------------------------

See //BUILD.gn:1248:1: which caused the file to be included.

action("postmortem-metadata") {

^------------------------------

My gn settings are:

is_component_build = false

is_debug = false

target_cpu = "x64"

use_custom_libcxx = false

v8_monolithic = true

v8_use_external_startup_data = false

is_clang = true

The same settings are building OK with Windows and MacOS.

Any ideas?

[Richard]

It turns out for Ubuntu, you need to have Python2 as your default python installation, not Python3.

[ron...@gmail.com]

Kismet. Just stumbled on re-remembering the same problem when I moved my setup

to a WSL Ubuntu today.  I think I will change my bash script meant to shield me from

Google pain so that it inserts depot_tools/boots...@3.8.9.chromium.14_bin/python/bin

into the path if it's not already there. Of course, the path presumably changes...

I wonder why the massive build monstrosity can't realize it packed its own

Python for the journey and just use that one correctly?

Also noticed today that gn chokes if glib is not installed. Wish the build system

could say things like "I'm missing X, which I need" instead of a stack traceback

for simple failed requirements.