Re: [boost] config with cygwin

Subject: Re: [boost] config with cygwin
From: Beman Dawes (bdawes_at_[hidden])
Date: 2010-06-11 10:17:40

Robert wrote:

> I've recently upgraded to the lastest version of Cygwin and found that
> this current version supports wchar_t, wstring, etc

Yes! Finally! MinGW also now supports them. Filesystem V3 requires
wchar_t, wstring, etc., and all the tests pass with both Cygwin and
MinGW.

> This section from config/platform/cygwin is now creating problems.
>
> // cygwin specific config options:
> #define BOOST_PLATFORM "Cygwin"
> #define BOOST_NO_CWCHAR
> #define BOOST_NO_CWCTYPE
> #define BOOST_NO_SWPRINTF
> #define BOOST_HAS_DIRENT_H
> #define BOOST_HAS_LOG1P
> #define BOOST_HAS_EXPM1
>
> as it conflits with the following from config/stdlib/libstdcp3
>
> #if !defined(_GLIBCPP_USE_WCHAR_T) && !defined(_GLIBCXX_USE_WCHAR_T)
> # define BOOST_NO_CWCHAR
> # define BOOST_NO_CWCTYPE
> # define BOOST_NO_STD_WSTRING
> # define BOOST_NO_STD_WSTREAMBUF
> #endif
>
> I've found that BOOST_NO_STD_WSTRING is NOT defined while
> BOOST_NO_CWCHAR IS defined.  This is incorrect for the
> latest version of cygwin - version 1.7.5 and likely previous versions.
>
> I believe that config/platform/cygwin should be updated so that it looks
> like:
>
> #define BOOST_PLATFORM "Cygwin"
> #define BOOST_NO_SWPRINTF   // ? don't know about the rest of these
> #define BOOST_HAS_DIRENT_H
> #define BOOST_HAS_LOG1P
> #define BOOST_HAS_EXPM1
>
> according to the cygwin documentation - there is no place to retrieve
> a version # for cygwin itself - only for specific packages.  So it would
> seem that that's all we can/should do.

I agree.  BOOST_NO_SWPRINTF should also go IMO.

Changes committed to trunk.

Thanks for noticing this,

--Beman