See also https://bugs.erlang.org/browse/ERL-634.

The utility program `erl_call' in erl_interface used to call
lib:eval_str/1, which is no longer present in Erlang/OTP 21.0.

The lib module was eliminated in OTP-15072, see also
https://github.com/erlang/otp/pull/1786.

ERL-629 Do not free() module buffer until it has been used

Compiling OTP-20.3.4 with GCC-7 generates the following warning:

 CC     /tmp/otp_src_20.3.4/lib/erl_interface/obj.st/x86_64-unknown-linux-gnu/erl_marshal.o
legacy/erl_marshal.c: In function 'erl_init_marshal':
legacy/erl_marshal.c:110:5: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
     memset(cmp_array, 0, CMP_ARRAY_SIZE);
     ^~~~~~

CMP_ARRAY_SIZE (256) is the number of elements in that array, but the
elements are not char but enum, which is 4 bytes on e.g. x86-64.
This results in 3/4 of the array not being correctly initialized.

Idiomatic C is to pass sizeof cmp_array to memset(), so that's what I did.

* sverker/optimize-atom-enc-dec/ERIERL-150/OTP-15023:
  erl_interface: Optimize latin1_to_utf8 and friend
  ic: Optimize oe_ei_encode_atom

to do word wise check/copy for pure ASCII
if ARCH allows it (x86 and amd64).

when ei_gethostbyname_r returns ERANGE.