http://llvm.org/bugs/show_bug.cgi?id=21626
jh <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|INVALID |--- --- Comment #6 from jh <[email protected]> --- > The point of [extern_c] is twofold: (1) it builds the > target module in an implicit extern "C" context (which > affects its semantics in lots of ways), and (2) it > allows the module to be imported in an extern "C" > context. You don't want (2) without (1), because that > can lead to silent and hard-to-diagnose build breaks. Thank you for the explanation. I don't know whether it is correct: `module` works like precompiled headers which works fine without [extern_c]. Since `extern "C"` is a linkage, i.e., it is used in link-time, and the linker works fine with current defines in headers, why another marker is needed at compile-time? > The next problem is with the CoreFoundation module map. > Again, this is an Apple problem not a Clang one. The > reason why this "works" with XCode 6.1 is that -fmodules > does nothing in C++ mode there. > Ultimately, the problem is that the module maps you're > using have not been made to work with C++, and they don't. I have modified all module maps in OS X SDK and recompile the code, this time the header-file-scattering problem. In OS X/iOS SDK, header files in one framework could be in another framework, for example: IORegistryEntry.h belongs to IOKit，but it is placed under Kernel.framework. I know this is Apple's problem, too, but the old question: without `-fmodules`, the compiler works fine with locating the file in both objective-C and C++ mode. ``` While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: While building module 'CoreGraphics' imported from /System/Library/Frameworks/Foundation.framework/Headers/NSGeometry.h:12: While building module 'IOKit' imported from /System/Library/Frameworks/CoreGraphics.framework/Headers/CGDisplayConfiguration.h:8: In file included from <module-includes>:126: /System/Library/Frameworks/IOKit.framework/Headers/video/IOVideoDevice.h:12:10: fatal error: 'IOKit/IOService.h' file not found #include <IOKit/IOService.h> ^ While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: While building module 'CoreGraphics' imported from /System/Library/Frameworks/Foundation.framework/Headers/NSGeometry.h:12: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/CoreGraphics.framework/Headers/CoreGraphics.h:41: /System/Library/Frameworks/CoreGraphics.framework/Headers/CGDisplayConfiguration.h:8:10: fatal error: could not build module 'IOKit' #include <IOKit/IOKitLib.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: While building module 'CoreGraphics' imported from /System/Library/Frameworks/Foundation.framework/Headers/NSGeometry.h:12: While building module 'IOSurface' imported from /System/Library/Frameworks/CoreGraphics.framework/Headers/CGDisplayStream.h:9: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/IOSurface.framework/Headers/IOSurface.h:13: /System/Library/Frameworks/IOSurface.framework/Headers/IOSurfaceAPI.h:12:10: fatal error: could not build module 'IOKit' #include <IOKit/IOKitLib.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:42: In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSKeyedArchiver.h:8: /System/Library/Frameworks/Foundation.framework/Headers/NSGeometry.h:12:9: fatal error: could not build module 'CoreGraphics' #import <CoreGraphics/CGBase.h> ~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: While building module 'CoreServices' imported from /System/Library/Frameworks/Foundation.framework/Headers/NSURLError.h:12: While building module 'DiskArbitration' imported from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Files.h:56: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/DiskArbitration.framework/Headers/DiskArbitration.h:29: /System/Library/Frameworks/DiskArbitration.framework/Headers/DADisk.h:28:10: fatal error: could not build module 'IOKit' #include <IOKit/IOKitLib.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: While building module 'CoreServices' imported from /System/Library/Frameworks/Foundation.framework/Headers/NSURLError.h:12: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:23: In file included from /System/Library/Frameworks/CoreServices.framework/Frameworks/AE.framework/Headers/AE.h:20: In file included from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/CarbonCore.h:87: In file included from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Components.h:26: /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Files.h:56:10: fatal error: could not build module 'DiskArbitration' #include <DiskArbitration/DADisk.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: While building module 'ApplicationServices' imported from /System/Library/Frameworks/Foundation.framework/Headers/NSAppleEventDescriptor.h:7: In file included from <module-includes>:1: /System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:23:10: fatal error: could not build module 'CoreServices' #include <CoreServices/CoreServices.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: While building module 'ApplicationServices' imported from /System/Library/Frameworks/Foundation.framework/Headers/NSAppleEventDescriptor.h:7: While building module 'CoreText' imported from /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framework/Headers/SFNTLayoutTypes.h:16: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreText.framework/Headers/CoreText.h:21: In file included from /System/Library/Frameworks/CoreText.framework/Headers/CTFont.h:21: /System/Library/Frameworks/CoreText.framework/Headers/CTFontDescriptor.h:28:10: fatal error: could not build module 'CoreGraphics' #include <CoreGraphics/CGAffineTransform.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'Foundation' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: While building module 'ApplicationServices' imported from /System/Library/Frameworks/Foundation.framework/Headers/NSAppleEventDescriptor.h:7: While building module 'ImageIO' imported from /System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:47: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ImageIO.framework/Headers/ImageIO.h:16: /System/Library/Frameworks/ImageIO.framework/Headers/CGImageSource.h:14:10: fatal error: could not build module 'CoreGraphics' #include <CoreGraphics/CoreGraphics.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: In file included from <module-includes>:1: /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:9: fatal error: could not build module 'Foundation' #import <Foundation/Foundation.h> ~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'AppKit' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13: In file included from <module-includes>:1: /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:9: fatal error: could not build module 'Foundation' #import <Foundation/Foundation.h> ~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'AppKit' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13: While building module 'QuartzCore' imported from /System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:36: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/QuartzCore.framework/Headers/CAAnimation.h:6: In file included from /System/Library/Frameworks/QuartzCore.framework/Headers/CALayer.h:6: In file included from /System/Library/Frameworks/QuartzCore.framework/Headers/CAMediaTiming.h:6: /System/Library/Frameworks/QuartzCore.framework/Headers/CABase.h:17:10: fatal error: could not build module 'ApplicationServices' #include <ApplicationServices/ApplicationServices.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'AppKit' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13: While building module 'QuartzCore' imported from /System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:36: While building module 'CoreVideo' imported from /System/Library/Frameworks/QuartzCore.framework/Headers/CAOpenGLLayer.h:7: In file included from <module-includes>:1: In file included from /System/Library/Frameworks/CoreVideo.framework/Headers/CoreVideo.h:25: /System/Library/Frameworks/CoreVideo.framework/Headers/CVDisplayLink.h:24:10: fatal error: could not build module 'ApplicationServices' #include <ApplicationServices/ApplicationServices.h> ~~~~~~~~^ While building module 'Cocoa' imported from m.mm:1: While building module 'AppKit' imported from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13: While building module 'CoreData' imported from /System/Library/Frameworks/AppKit.framework/Headers/NSPredicateEditorRowTemplate.h:12: In file included from <module-includes>:1: /System/Library/Frameworks/CoreData.framework/Headers/CoreData.h:8:9: fatal error: could not build module 'Foundation' #import <Foundation/Foundation.h> ~~~~~~~^ m.mm:1:9: fatal error: could not build module 'Cocoa' #import <Cocoa/Cocoa.h> ~~~~~~~^ 15 errors generated. ``` -- You are receiving this mail because: You are on the CC list for the bug.
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