[Libreoffice] warning: the use of `tmpnam' is dangerous, better use `mkstemp'

Hello,

I had this warning by compiling hwpfilter during some cppcheck cleaning. 
I knew nothing about it so I read some links given by Google.
It seems mkstemp is safer since it permits "to avoid race conditions".

In the Unix man of tmpnam, we can read this :
"
BUGS
       Never use this function.  Use mkstemp(3) or tmpfile(3) instead.
"

I'm just a beginner in C++ so what's your opinion about it ?

Julien