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Re: Different __WCHAR_TYPE__/wchar_t for gcc -m32 on Linux/i386 and Linux/x86-64
On Wed, May 30, 2012 at 9:25 AM, Joseph S. Myers
<joseph@codesourcery.com> wrote:
> On Wed, 30 May 2012, H.J. Lu wrote:
>
>> On Linux/i386:
>
>> long int
>
>> On Linux/x86-64:
>>
>> [hjl@gnu-6 include]$ echo __WCHAR_TYPE__ | gcc -m32 -E -
>
>> int
>
> That's a bug. ?Not a very serious one - it doesn't affect C++ name
> mangling because wchar_t is a built-in type in C++, with its own mangling
> - but still a bug. ?The choice of underlying type for wchar_t should not
> depend on what the compiler defaults to like that. ?(Actually, it looks
> like a 32-bit-default compiler built --enable-targets=all also uses "int"
> here.)
>
> The types of WCHAR_MIN and WCHAR_MAX in both stdint.h and wchar.h need to
> correspond correctly to the underlying type of wchar_t. ?GCC's stdint.h
> gets this right automatically, glibc has bits/wchar.h with a special
> sysdeps/unix/sysv/linux/i386 version to use "long".
>
How can we fix it without causing problems for existing GCC
nor GLIBC installations?
--
H.J.