[LLVMbugs] [Bug 11126] New: Mac OS X (Lion): “error : unknown type name 'BOOL'; did you mean 'BOOL'? ” when using LLVM 3 .0 (Xcode 4.2)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=11126

           Summary: Mac OS X (Lion): “error: unknown type name 'BOOL'; did
                    you mean 'BOOL'?” when using LLVM 3.0 (Xcode 4.2)
           Product: clang
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: noloader at gmail.com
                CC: llvmbugs at cs.uiuc.edu


My apologies if this is not a front end issue.

When compiling the following code fragment using LLVM 3.0 on Lion with Intel
x64 hardware (MacBook):

// AppConstants.h
typedef enum { ThreadPriorityLow = NSOperationQueuePriorityLow,
ThreadPriorityNormal = NSOperationQueuePriorityNormal, ThreadPriorityHigh =
NSOperationQueuePriorityHigh, ThreadPriorityDefault = ThreadPriorityNormal }
ThreadPriority;

static inline BOOL IsValidThreadPriority(ThreadPriority priority)
{
    return priority == ThreadPriorityLow || priority == ThreadPriorityNormal ||
priority == ThreadPriorityHigh;
}

The compiler spits out an error:

    “error: unknown type name 'BOOL'; did you mean 'BOOL'?”

I can right click on the offending BOOL in Xcode, and Xcode will happily jump
to the definition in <objc/objc.h>. Though I'm using precompiled headers (so
the declaration should be available), including <objc/objc.h> directly did
*not* resolve the issue.

Switching to GCC 4.2 resolved the issue.

Also filed as an Apple Bug: Radar 10278815. Reported to LLVM since Apple can
move very slowly at times. My apologies if Apple has pushed it upstream
already.

$ uname -a
Darwin newton 11.2.0 Darwin Kernel Version 11.2.0: Tue Aug  9 20:54:00 PDT
2011; root:xnu-1699.24.8~1/RELEASE_X86_64 x86_64

$ clang --version
Apple clang version 3.0 (tags/Apple/clang-211.10.1) (based on LLVM 3.0svn)
Target: x86_64-apple-darwin11.2.0
Thread model: posix

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