[Bug 254621] math/R: remove obsolete fpsetmask

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254621

            Bug ID: 254621
           Summary: math/R: remove obsolete fpsetmask
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: jrm at freebsd.org
          Reporter: pkubaj at FreeBSD.org
          Assignee: jrm at freebsd.org
             Flags: maintainer-feedback?(jrm at freebsd.org)

Created attachment 223657
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=223657&action=edit
patch

src/unix/sys-unix.c uses fpsetmask to workaround a bug that is not present
since FreeBSD 4.0.

This issue also affected Firefox and was resolved 9 years ago
https://bugzilla.mozilla.org/show_bug.cgi?id=789436#c27

fpsetmask executions cause R build to crash on powerpc64(le), since new SIGFPE
kernel code doesn't take into account old workarounds.

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