[Bug sanitizer/80424] New: libasan uses tempnam tmpnam tmpnam_r

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80424

            Bug ID: 80424
           Summary: libasan uses tempnam tmpnam tmpnam_r
           Product: gcc
           Version: 7.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zeccav at gmail dot com
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu

Running make check on an address sanitized version of gcc trunk 246751
I get lots of the following:

/home/vitti/1tb/vitti/local/gcc-7-246751/lib64/libasan.so.4: warning: the use
of `tempnam' is dangerous, better use `mkstemp'
/home/vitti/1tb/vitti/local/gcc-7-246751/lib64/libasan.so.4: warning: the use
of `tmpnam' is dangerous, better use `mkstemp'
/home/vitti/1tb/vitti/local/gcc-7-246751/lib64/libasan.so.4: warning: the use
of `tmpnam_r' is dangerous, better use `mkstemp'

Is the address sanitizer using dangerous system calls?

Then they should be changed to mkstemp. 

Otherwise is there a way to avoid those warnings?
Maybe setting a global variable?