--print=native-static-libs should behave as the other --print commands and not create output

[lu-zero]

It creates .a instead.

And if one wants to get the link line in shell you have this mouthful expression:

NATIVE_LIBS=`rustc --crate-type staticlib \
  --print native-static-libs 2>&1 - < /dev/null | \
  grep native-static-libs | cut -d ':' -f 3`

[Enselic]

Triage: Reproducer:

$ mkdir new-empty-dir
$ cd new-empty-dir
$ rustc --crate-type staticlib --print native-static-libs - </dev/null
$ [ -f *.a ] && echo ".a was created :("
.a was created :(