Re: [patch] libstdc++/66030 fix codecvt exports for mingw32

[Martin Sebor <msebor@redhat.com>]

On 06/08/2015 09:12 AM, Jonathan Wakely wrote:
> The linker script assumes that std::mbstate_t has the name __mbstate_t
> for linkage purposes, but that's not necessarily true. For mingw32
> it's just a typedef for int, so the patterns don't match.
>
> This adds a new mingw32-specific pattern for codecvt_byname's
> constructors and destructors, and relaxes the patterns for
> codecvt<charNN_t, char, mbstate_t> so they match __mbstate_t or int.

As a data point, in case other targets have a similar issue,
mbstate_t is a typedef for char* on AIX, and (based on my
old notes) typedef struct mbstate_t on HP-UX.

(It is a typedef struct __mbstate_t on Darwin and Solaris.)

Martin