2020-12-11

libffi is keg-only, which means it was not symlinked into /opt/homebrew,

because macOS already provides this software and installing another version in

parallel can cause all kinds of trouble.

For compilers to find libffi you may need to set:

set -gx LDFLAGS "-L/opt/homebrew/opt/libffi/lib"

set -gx CPPFLAGS "-I/opt/homebrew/opt/libffi/include"

For pkg-config to find libffi you may need to set:

set -gx PKG_CONFIG_PATH "/opt/homebrew/opt/libffi/lib/pkgconfig"