$ meson --cross-file cross.txt mingw64-bash2
The Meson build system
Version: 0.60.99
Source dir: C:/msys64/home/William/Projects/MCVE/meson/cross-cl
Build dir: C:/msys64/home/William/Projects/MCVE/meson/cross-cl/mingw64-bash2
Build type: cross build
Project name: meson-cross
Project version: undefined
C compiler for the host machine: riscv64-unknown-elf-gcc (gcc 8.3.0 "riscv64-unknown-elf-gcc (SiFive GCC 8.3.0-2019.08.0) 8.3.0")
C linker for the host machine: riscv64-unknown-elf-gcc ld.bfd 2.32.0-2019