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Date:	Thu, 26 Sep 2013 21:16:29 +0800
From:	JonY <jon_y AT users DOT sourceforge DOT net>
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Subject:	Re: winbase.h issue
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On 9/26/2013 21:07, JonY wrote:
> On 9/26/2013 18:47, Noboru Uchida wrote:
>> When I try the following:
>>
>> $ echo "#include <windows.h>" >foo.cc && c++ -c foo.cc
>>
>> I get tons of redefinition errors on Interlocked functions in winbase.h.
>>
>=20
> Looks like it happens only in C++ mode.
>=20

Adding mingw-w64 list.
Here are some of the errors:

> /usr/include/w32api/winbase.h: In function =1B$B!F=1B(Bunsigned int _Inte=
rlockedIncrement(volatile unsigned int*)=1B$B!G=1B(B:
> /usr/include/w32api/winbase.h:2925:33: error: redefinition of =1B$B!F=1B(=
Bunsigned int _InterlockedIncrement(volatile unsigned int*)=1B$B!G=1B(B
>    FORCEINLINE unsigned __LONG32 InterlockedIncrement (unsigned __LONG32 =
volatile *Addend) { return (unsigned __LONG32) InterlockedIncrement ((volat=
ile __LONG32 *) Addend); }
>                                  ^
> /usr/include/w32api/winbase.h:2924:24: error: =1B$B!F=1B(Bunsigned int _I=
nterlockedIncrement(volatile unsigned int*)=1B$B!G=1B(B previously defined =
here
>    FORCEINLINE unsigned InterlockedIncrement (unsigned volatile *Addend) =
{ return (unsigned) InterlockedIncrement ((volatile __LONG32 *) Addend); }
>                         ^
> /usr/include/w32api/winbase.h: In function =1B$B!F=1B(Bunsigned int _Inte=
rlockedDecrement(volatile unsigned int*)=1B$B!G=1B(B:
> /usr/include/w32api/winbase.h:2930:33: error: redefinition of =1B$B!F=1B(=
Bunsigned int _InterlockedDecrement(volatile unsigned int*)=1B$B!G=1B(B
>    FORCEINLINE unsigned __LONG32 InterlockedDecrement (unsigned __LONG32 =
volatile *Addend) { return (unsigned __LONG32) InterlockedDecrement ((volat=
ile __LONG32 *) Addend); }
>                                  ^
> /usr/include/w32api/winbase.h:2929:24: error: =1B$B!F=1B(Bunsigned int _I=
nterlockedDecrement(volatile unsigned int*)=1B$B!G=1B(B previously defined =
here
>    FORCEINLINE unsigned InterlockedDecrement (unsigned volatile *Addend) =
{ return (unsigned __LONG32) InterlockedDecrement ((volatile __LONG32 *) Ad=
dend); }
>                         ^


So the declaration was:
> extern "C++" {
>   FORCEINLINE unsigned InterlockedIncrement (unsigned volatile *Addend) {=
 return (unsigned) InterlockedIncrement ((volatile __LONG32 *) Addend); }
>   FORCEINLINE unsigned __LONG32 InterlockedIncrement (unsigned __LONG32 v=
olatile *Addend) { return (unsigned __LONG32) InterlockedIncrement ((volati=
le __LONG32 *) Addend); }

Cygwin64 g++ wasn't happy with that. Cygwin 32bit mode is fine though.



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