Failed to build with Meson 0.42.1
Not sure if the problem is with the old version of Meson or not.
$meson build
The Meson build system
Version: 0.42.1
Source dir: /usr/local/google/home/tfoucu/third_party/dav1d
Build dir: /usr/local/google/home/tfoucu/third_party/dav1d/build
Build type: native build
Meson encountered an error in file meson.build, line 63, column 45:
Expecting rbracket got id.
['_WIN32_WINNT', 0x0601],
^________________________________^
Looks like the meson build is using feature coming from 0.45 and up. Maybe update the documentation about the Meson build version to use.