[Bug c/84475] New: pthread doesn't define _REENTRANT in preprocessor on riscv-linux

[icenowy at aosc dot io]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84475

            Bug ID: 84475
           Summary: pthread doesn't define _REENTRANT in preprocessor on
                    riscv-linux
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: icenowy at aosc dot io
  Target Milestone: ---

The newly introduced platform, riscv, doesn't have _REENTRANT defined when
-pthread is appended.