Re: [Boost-bugs] [Boost C++ Libraries] #896: <native-wchar_t>off does not work when build with vc-8.0

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #896: <native-wchar_t>off does not work when build with vc-8.0
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2007-11-15 18:31:43

#896: <native-wchar_t>off does not work when build with vc-8.0
----------------------+-----------------------------------------------------
  Reporter:  sielenk  |       Owner:  grafik     
      Type:  Bugs     |      Status:  closed     
 Milestone:           |   Component:  build      
   Version:  None     |    Severity:  Showstopper
Resolution:  fixed    |    Keywords:             
----------------------+-----------------------------------------------------
Changes (by grafik):

  * status:  assigned => closed
  * resolution:  Later => fixed
  * severity:  => Showstopper

Old description:

> {{{
> When the boost libraries are build with the build flag '-sBUILD="<native-
> wchar_t>off"' the resulting binaries still use the native wchar_t type.
>
> Reason/Fix:
> In vc-8_0-tools.jam the feature is defined as follows:
> --- snip ---
> feature native-wchar_t : on off ;
> flags vc-8_0 C++FLAGS : /Zc:forScope ;
> flags vc-8_0 C++FLAGS <native-wchar_t>on : /Zc:wchar_t ;
> --- snip ---
>
> But since 'on' is the default value for the new compiler, the defined
> flags are redundant and the flags for 'off' are missing.
>
> To fix, change it to
> --- snip ---
> feature native-wchar_t : on off ;
> flags vc-8_0 C++FLAGS : /Zc:forScope ;
> flags vc-8_0 C++FLAGS <native-wchar_t>off : /Zc:wchar_t- ;
> --- snip ---
>
> }}}

New description:

 {{{
 When the boost libraries are build with the build flag '-sBUILD="<native-
 wchar_t>off"' the resulting binaries still use the native wchar_t type.

 Reason/Fix:
 In vc-8_0-tools.jam the feature is defined as follows:
 --- snip ---
 feature native-wchar_t : on off ;
 flags vc-8_0 C++FLAGS : /Zc:forScope ;
 flags vc-8_0 C++FLAGS <native-wchar_t>on : /Zc:wchar_t ;
 --- snip ---

 But since 'on' is the default value for the new compiler, the defined
 flags are redundant and the flags for 'off' are missing.

 To fix, change it to
 --- snip ---
 feature native-wchar_t : on off ;
 flags vc-8_0 C++FLAGS : /Zc:forScope ;
 flags vc-8_0 C++FLAGS <native-wchar_t>off : /Zc:wchar_t- ;
 --- snip ---

 }}}

Comment:

 It seems BBv2 now handles this with brute force. It just turns on native
 wchar for any msvc >= 7. And there is no feature to do otherwise.

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/896#comment:2>
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