[Mingw-users] Problems with compiling Windows system calls with MinGW gcc 6.3.0

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Keith Marshall keith****@users*****
Thu Jun 28 01:20:12 JST 2018


On 27/06/18 16:59, Eli Zaretskii wrote:
>> #include <_mingw.h>
>> > 
>> > #ifndef RTX
>> > #define GNAT_UNICODE_SUPPORT
>> > #define _UNICODE /* For C runtime */
>> > #define UNICODE  /* For Win32 API */
>> > #endif
> This is supposed to define UNICODE unless RTX is defined.  Does that
> mean RTX is defined in your case?  Because if it doesn't, then UNICODE
> should have become defined, and should have caused 'TCHAR *' and
> LPCTSTR become the same, and should have also caused
> GetFileAttributesEx resolve to GetFileAttributesExW, which does expect
> wchar_t strings.

That presupposes that UNICODE/_UNICODE have been defined in proper time;
in OP's case, the code to map GetFileAttributesEx to it UNICODE vs. ANSI
variant has already been specified to select GetFileAttributesExA, when
he included <_mingw.h> *before* he defined UNICODE/_UNICODE.

> Which ones of these didn't work, and why?

The mapping was already defined, to GetFileAttributesExA, because he did
not define UNICODE/_UNICODE in time ... that *must* come *before*

   #include <_mingw.h>

-- 
Regards,
Keith.

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