The erl_interface C header and library were deprecated in Erlang/OTP
22 for removal in Erlang/OTP 23. Change the default C include paths
and linker options to not use erl_interface header files or libraries
if erl_interface.h is not detected in the erl_interface installation.
Change README.md to note that the erl_interface library is not always
used in ERL_LDFLAGS.
The erl_interface C header and library were deprecated in Erlang/OTP 22 for removal in Erlang/OTP 23. Change the default C include paths and linker options to not use erl_interface header files or libraries if erl_interface.h is not detected in the erl_interface installation.
Change README.md to note that the erl_interface library is not always used in ERL_LDFLAGS.