[llvm-bugs] [Bug 44365] New: -Wpragma-once-outside-header warns in a modular header unit

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44365

            Bug ID: 44365
           Summary: -Wpragma-once-outside-header warns in a modular header
                    unit
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: david at doublewise.net
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

When compiling a header unit consisting of


#pragma once


and passing the flag -Wpragma-once-outside-header, clang emits a warning. It
should not emit a warning -- header units can still be included like normal.

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