[Csnd-dev] Building on Linux/rpi

I'm attempting my first v7/develop build on a Raspberry Pi (where I've been
building v6 for several years.

When I start with a clean "build" subdirectory and execute "cmake ..", I
get the two following errors (really the same error):

CMake Error at CMakeLists.txt:1416 (add_library):
  Target "csound64-static" links to target "Intl::Intl" but the target was
  not found.  Perhaps a find_package() call is missing for an IMPORTED
  target, or an ALIAS target is missing?


CMake Error at CMakeLists.txt:1198 (add_library):
  Target "csound64" links to target "Intl::Intl" but the target was not
  found.  Perhaps a find_package() call is missing for an IMPORTED target,
or
  an ALIAS target is missing?

I re-ran "sudo apt-get build-dep csound" but didn;t get anything new, and
my system is up to date. I see that BUILD.md hasn't changed in two years.
Does it need to be updated?

- Dave