https://issues.dlang.org/show_bug.cgi?id=22863

          Issue ID: 22863
           Summary: [REG2.099] -main doesn't work anymore when used for
                    linking only (without source modules)
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: regression
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: kinke@gmx.net

`dmd -main foo.o` yields an undefined `main` for any foo.o not defining a main itself - the __main.o object file doesn't make it to the linker cmdline.

See https://github.com/ldc-developers/ldc/pull/3938.

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