Error
When you try to install Pygobject using pip, you get the following error:
Package 'libffi', required by 'gobject-2.0', not found
Solution
First check that you have installed libffi using brew:
brew search libffi
If you have installed libffi, you will get the following output:
libffi ✔
brew search libffi 4.29s user 1.43s system 68% cpu 8.358 total
You will need to set some environment variables to make it available for compilers or pkg-config :
For compilers to find libffi you may need to set:
export LDFLAGS="-L/usr/local/opt/libffi/lib"
For pkg-config to find libffi you may need to set:
export PKG_CONFIG_PATH="/usr/local/opt/libffi/lib/pkgconfig"