New comment by ackalker on void-packages repository

https://github.com/void-linux/void-packages/issues/27965#issuecomment-766370106

Comment:
I believe that the following 2 commits to be relevant to the current issue: qemu/qemu@6aae2a2e0e3c43e479f889389074cda8bef3a580, qemu/qemu@ab4c0996f80d43d1fc28c6e76f4ecb27423a7e29.

In particular, the commit message of the 2nd commit seems relevant:

> When cross-compiling, by default qemu_datadir is 'c:\Program
Files\QEMU', which is not recognized as being an absolute path, and
meson will end up adding the prefix again.

The problem appears to be: `configure_file()` needs to be supplied both the absolute path to the firmware blobs for substitution into the descriptor files _and_ the relative path to qemu data directory for installation. Catch-22.