compilation warning on mac

[newystats]

loslib.c:169:3: warning: 'tmpnam' is deprecated: This function is provided for compatibility reasons only. Due to security concerns inherent in the design of tmpnam(3), it is highly recommended that you use mkstemp(3) instead. [-Wdeprecated-declarations]
lua_tmpnam(buff, err);
^

version
_
platform x86_64-apple-darwin15.6.0
arch x86_64
os darwin15.6.0
system x86_64, darwin15.6.0
status
major 3
minor 6.1
year 2019
month 07
day 05
svn rev 76782
language R
version.string R version 3.6.1 (2019-07-05)
nickname Action of the Toes

[gvelasq]

I got the same error when installing the amazingly useful package {lookup}, which depends on {highlite}.