Libffi-3.4.2

Reference: 8.48. Libffi-3.4.2. This package is required by python.

./configure --prefix=/plng \
            --includedir=/plng/inc \
            --mandir=/plng/man \
            --infodir=/tmp \
            --disable-static \
            --with-gcc-arch=native \
            --disable-exec-static-tramp

make
make install