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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - "Use of '@import' in framework header" warning should take __has_feature(modules) into account"
href="https://bugs.llvm.org/show_bug.cgi?id=44968">44968</a>
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<th>Summary</th>
<td>"Use of '@import' in framework header" warning should take __has_feature(modules) into account
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>Macintosh
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<th>OS</th>
<td>MacOS X
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Modules
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>jrose@belkadan.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>I recently came across the following code:
#if __has_feature(modules)
@import Foundation;
#else
#import <Foundation/Foundation.h>
#endif
For which Xcode 11.3.1 gives me the following warning
<span class="quote">> Use of '@import' in framework header is discouraged, including this header requires -fmodules</span >
defined in Clang here:
<a href="https://github.com/llvm/llvm-project/blob/24ad121582454e625bdad125c90d9ac0dae948c8/clang/include/clang/Basic/DiagnosticParseKinds.td#L280-L283">https://github.com/llvm/llvm-project/blob/24ad121582454e625bdad125c90d9ac0dae948c8/clang/include/clang/Basic/DiagnosticParseKinds.td#L280-L283</a>
But the presence of the __has_feature check indicates that the framework author
has thought about this concern, and thus the warning shouldn't be emitted.</pre>
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