fakeuser.c:(.text.startup+0xb8): aviso: the use of `mktemp' is dangerous, better use `mkstemp' or `mkdtemp'

[sl1pkn07]

cc  -march=native -O2 -pipe -fno-plt -D_GNU_SOURCE -D_XOPEN_SOURCE=700 -std=c99 -shared -fPIC -o libfakeuser.so fakeuser.c util.c -ldl -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now
cc -march=native -O2 -pipe -fno-plt -D_GNU_SOURCE -D_XOPEN_SOURCE=700 -std=c99 -o fakeadd fakeadd.c util.c -ldl -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now
/usr/bin/ld: /tmp/cc23WqSK.o: en la función `fakeuser_init':
fakeuser.c:(.text.startup+0xb8): aviso: the use of `mktemp' is dangerous, better use `mkstemp' or `mkdtemp'