Can't Install ffi -v '1.9.18' on macos Catalina
To get past that error, install ffi using:
gem install ffi -v '1.9.18' -- --with-cflags="-Wno-error=implicit-function-declaration"
Can't install `ffi -v 1.12.2` on mac OS Monterey
I have the same issue on M1 with ffi 1.15.5 and it works if I do:
gem install ffi -v '1.15.5' -- --with-cflags=-Wno-implicit-function-declaration
Same thing goes for ffi 1.12.2.
As far as I understand it (don't know C and googled this) - When C doesn’t find a function, it assumes it is implicitly declared and errors out. --with-cflags=-Wno-implicit-function-declaration tells the compiler to ignore any functions that are implicitly declared.
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