configure: error: Package requirements (libffi >= 3.0.0) were not met: No package 'libffi' found

[cmey]

On a fresh Julia 1.1.1 install and a fresh ~/.julia (just totally deleted it):

(WaveSim.jl) pkg> add Cairo
(WaveSim.jl) pkg> build Cairo
  Building LibCURL ─→ `~/.julia/packages/LibCURL/lWJxD/deps/build.log`
  Building WinRPM ──→ `~/.julia/packages/WinRPM/Y9QdZ/deps/build.log`
  Building Homebrew → `~/.julia/packages/Homebrew/s09IX/deps/build.log`
  Building Cairo ───→ `~/.julia/packages/Cairo/p68X8/deps/build.log`
┌ Error: Error building `Cairo`, showing the last 100 of log:
[...]
configure: error: Package requirements (libffi >= 3.0.0) were not met:
│
│ No package 'libffi' found
[...]

Full log build.log

This is on macOS, versions:

julia> versioninfo()
Julia Version 1.1.1
Commit 55e36cc (2019-05-16 04:10 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin15.6.0)
  CPU: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.1 (ORCJIT, skylake)
Environment:
  JULIA_NUM_THREADS = 4

(WaveSim.jl) pkg> status
    Status `~/Code/julia/WaveSim.jl/Project.toml`
  [159f3aea] + Cairo v0.6.0

[mirestrepo]

this is also seen in #271

[cmey]

Cairo.jl master might work better:

(WaveSim.jl) pkg> add Cairo.jl#master

I'm hitting a different error: JuliaPackaging/Homebrew.jl#262

Though I'm not sure yet if this error occurs past, or even earlier than, the aforementioned libffi issue.