[Bug 251251] --cref on ld.lld writes the cref table to stdout even with -Map=filename

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251251

            Bug ID: 251251
           Summary: --cref on ld.lld writes the cref table to stdout even
                    with -Map=filename
           Product: Base System
           Version: 12.2-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs at FreeBSD.org
          Reporter: janm at transactionware.com

The --cref option on ld.lld only seems to write to stdout, ignoring the
-Map=filename option. This is a change from GNU ld.

To reproduce, compile and link any code with --cref, for example:

    echo 'int main() { return 0; }' > test.c
    cc -Wl,-Map=test.map -Wl,--cref test.c

The cross reference table is emitted on stdout instead of being written to
test.map.

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