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From: John Baldwin <jhb@freebsd.org>
To: Adrian Chadd <adrian@freebsd.org>
Subject: Re: svn commit: r251098 - head/sys/contrib/dev/ath/ath_hal/ar9300
Date: Thu, 30 May 2013 07:56:52 -0400
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
 src-committers@freebsd.org, Dimitry Andric <dim@freebsd.org>
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On Wednesday, May 29, 2013 1:58:44 pm Adrian Chadd wrote:
> No, it actually failed to compile at all on some older 9-stable laptops..
> 
> Hence my confusion.

<sys/types.h> defines the bool type in HEAD in the KERNEL:

#ifdef _KERNEL
...
#if !defined(__bool_true_false_are_defined) && !defined(__cplusplus)
#define __bool_true_false_are_defined   1
#define false   0
#define true    1
#if __STDC_VERSION__ < 199901L && __GNUC__ < 3 && !defined(__INTEL_COMPILER)
typedef int     _Bool;
#endif
typedef _Bool   bool;
#endif /* !__bool_true_false_are_defined && !__cplusplus */
...

-- 
John Baldwin