# Numba/llvmlite stack needs an older compiler for backwards compatability.
c_compiler_version:         # [linux]
  - 7                       # [linux and (x86_64 or ppc64le)]
  - 9                       # [linux and aarch64]

cxx_compiler_version:       # [linux]
  - 7                       # [linux and (x86_64 or ppc64le)]
  - 9                       # [linux and aarch64]

fortran_compiler_version:   # [linux]
  - 7                       # [linux and (x86_64 or ppc64le)]
  - 9                       # [linux and aarch64]

Use CBC to pin GCC to 7 on most linux and 9 on aarch64.
Use CBC to pin GCC to 7 on most linux and 9 on aarch64.

As title.
