>> >>     Regarding the /Zc:threadSafeInit option, this was added later, in
>> the
>> >>     June "VS14" CTP (now VS2015 in CTP 6), so I'm leaving it as-is.

>> >>     e

>> >>     On 03/23/2015 01:49 PM, Eric Voskuil wrote:
>> >>     > I've updated all libbitcoin repos so that there is no code in
>> >>     published
>> >>     > headers requiring the VC++ CTP compiler (generally C++11 stuff,
>> mostly
>> >>     > constexpr).
>> >>     >
>> >>     > I've done the same in all test projects, which I've also changed
>> >>     to not
>> >>     > use the CTP compiler and instead use VC++12. This provides a
>> >>     convenient
>> >>     > means to ensure that the CTP requirement doesn't creep into the
>> >>     headers
>> >>     > or break in another manner. It also provides an example of how
>> to link
>> >>     > to the main libraries (built with the CTP compiler) using the RTM
>> >>     compiler.

>> >>     >
>> >>     > There is a small additional runtime library that augments the
>> CRT when
>> >>     > linking with VC12. This is automatically incorporated, although
>> I may
>> >>     > try and get rid of that requirement by using "
>> /Zc:threadSafeInit" as
>> >>     > described here:

>> >>     >

>> >>     >

>> http://blogs.msdn.com/b/vcblog/archive/2014/06/03/visual-studio-14-ctp.aspx
>> >>     >
>> >>     > The changes are accomplished using three new libbitcoin macros
>> >>     > (BC_CONSTREXPR, BC_CONSTFUNC and BC_NOEXCEPT) so that non-MSVC
>> builds
>> >>     > are unaffected. These should be used in all published headers and
>> >>     tests.

>> >>     >
>> >>     > e

>> >>     >
>> >>     > On 03/19/2015 02:39 PM, Eric Voskuil wrote:
>> >>     >> It may not be too difficult to remove from headers. Templates
>> may
>> >>     >> present problems beyond the use of constexpr. I'd be happy to
>> >>     review a
>> >>     >> pull request.

>> >>     >>
>> >>     >> e

>> >>     >>
>> >>     >> On 03/19/2015 02:07 PM, Bedeho Mender wrote:
>> >>     >>> Hi Eric,

>> >>     >>>
>> >>     >>> Ive been talking to some Qt developers, and it appears that
>> you do
>> >>     >>> indeed have to rebuild Qt with a newer MSVC version, however,
>> it
>> >>     turns
>> >>     >>> out that this is likely not possible with the present build
>> >>     system on
>> >>     >>> Windows with these new versions of MSVC (for reasons was not
>> given).

>> >>     >>>
>> >>     >>> How difficult would it be to have a version of libbitcoin where
>> >>     the CTP
>> >>     >>> 2013 features were taken out, so that libbitcoin could be used
>> >>     with the
>> >>     >>> latest full release of MSVC 2013? That is, how prevalent is the
>> >>     usage of
>> >>     >>> C++11 features which only are implemented in the CTP? e.g.
>> >>     constexpr.

>> >>     >>>
>> >>     >>> I would be happy to sponsor this dev work depending on how
>> >>     involved it
>> >>     >>> would be, and that would allow people to use libbitcoin with Qt
>> >>     -  which
>> >>     >>> I think a lot of people will likely want to do, given that Qt
>> is the
>> >>     >>> most popular C++ framework out there.

>> >>     >>>
>> >>     >>> best
>> >>     >>>  bedeho

>> >>     >>>

>> >>     >>>

>> >>     >>>
>> >>     >>> On 17 March 2015 at 20:52, Eric Voskuil <eric@???
>> >>     <mailto:eric@voskuil.org>
>> >>     >>> <mailto:eric@voskuil.org <mailto:eric@voskuil.org>>> wrote:

>> >>     >>>
>> >>     >>>     Ah yes, that's unfortunate. Now I remember I looked at QT a
>> >>     while back
>> >>     >>>     and determined I would need to compile QT to make it work.
>> I
>> >>     decided to
>> >>     >>>     wait for time to resolve the issue :/

>> >>     >>>
>> >>     >>>     e

>> >>     >>>
>> >>     >>>     On 03/17/2015 06:27 AM, Bedeho Mender wrote:
>> >>     >>>     > Hi Eric, thanks for the quick response!

>> >>     >>>     >
>> >>     >>>     > It doesn't appear so to me, but perhaps I am
>> >>     misunderstanding the
>> >>     >>>     problem.

>> >>     >>>     >
>> >>     >>>     > When I make a minimal Qt project
>> >>     >>>     > (
>> https://github.com/bedeho/QtLibbitcoin/blob/master/main.cpp)
>> >>     >>>     which uses
>> >>     >>>     > MSVC2013, then if I just
>> >>     >>>     > include the libbitcoin header #include
>> >>     <bitcoin/bitcoin.hpp>, then
>> >>     >>>     I get
>> >>     >>>     > lots of compile errors.

>> >>     >>>     >
>> >>     >>>     > The errors seem to be associated with certain c++11
>> >>     features which
>> >>     >>>     > msvc2013 does
>> >>     >>>     > not support fully. Here is the first error I get

>> >>     >>>     >

>> >>     >>>     >
>> >>     C:\libbitcoin\libbitcoin\include\bitcoin/bitcoin/math/hash.hpp(31)
>> :
>> >>     >>>     > error C2146: syntax error : missing ';' before identifier
>> >>     'size_t'

>> >>     >>>     >
>> >>     >>>     > Which references line 31 in hash.hpp:

>> >>     >>>     >
>> >>     >>>     > constexpr size_t short_hash_size = 20;

>> >>     >>>     >
>> >>     >>>     > In this case, the problem seems to be that constexpr is a
>> >>     new feature
>> >>     >>>     > which msvc2013 does not support, from what I could
>> >>     understand by
>> >>     >>>     > reading up, and that CTP_Nov2013 was required for this
>> >>     reason. For
>> >>     >>>     > example, the release notes on this CTP explicitly
>> mentions
>> >>     constexpr
>> >>     >>>     > support
>> >>     >>>     (
>> http://www.microsoft.com/en-us/download/details.aspx?id=41151):
>> >>     >>>     > "constexpr (except for constructors)"

>> >>     >>>     >
>> >>     >>>     > Am I on the wrong track here? If not, getting Qt to work
>> >>     with CTP
>> >>     >>>     > is necessary to for using Libbitcon with Qt.

>> >>     >>>     >
>> >>     >>>     > bedeho

>> >>     >>>     >

>> >>     >>>     >
>> >>     >>>     > On 16 March 2015 at 22:48, Eric Voskuil <
>> eric@???
>> >>     <mailto:eric@voskuil.org>
>> >>     >>>     <mailto:eric@voskuil.org <mailto:eric@voskuil.org>>
>> >>     >>>     > <mailto:eric@voskuil.org <mailto:eric@voskuil.org>
>> >>     <mailto:eric@voskuil.org <mailto:eric@voskuil.org>>>> wrote:

>> >>     >>>     >
>> >>     >>>     >     You can link to the libbitcoin VC++ libs using the
>> >>     basic v120
>> >>     >>>     >     compiler, they are compatible.

>> >>     >>>     >
>> >>     >>>     >     e

>> >>     >>>     >

>> >>     >>>     >
>> >>     >>>     >     > On Mar 16, 2015, at 8:58 AM, Bedeho Mender
>> >>     >>>     >     <bedeho.mender@???
>> >>     <mailto:bedeho.mender@gmail.com> <mailto:bedeho.mender@gmail.com
>> >>     <mailto:bedeho.mender@gmail.com>>
>> >>     >>>     <mailto:bedeho.mender@gmail.com
>> >>     <mailto:bedeho.mender@gmail.com> <mailto:bedeho.mender@gmail.com
>> >>     <mailto:bedeho.mender@gmail.com>>>>
>> >>     >>>     wrote:

>> >>     >>>     >     >
>> >>     >>>     >     > I have built libbitcoin with msvc using the
>> compiler
>> >>     Microsoft
>> >>     >>>     >     Visual C++ Compiler Nov 2013 CTP.

>> >>     >>>     >     >
>> >>     >>>     >     > I am trying to use libbitcoin with a Qt project
>> >>     running in
>> >>     >>>     >     QtCreator, however it seems this is not easy to do,
>> >>     that is get Qt
>> >>     >>>     >     to get with the CTP.

>> >>     >>>     >     >
>> >>     >>>     >     > Does anyone have any advice on this?

>> >>     >>>     >     >
>> >>     >>>     >     > best
>> >>     >>>     >     >  Bedeho

>> >>     >>>

>> >>     >>>

>> >>     >>

>> >>     >

>> >>     _______________________________________________
>> >>     Libbitcoin mailing list
>> >>     Libbitcoin@??? <mailto:Libbitcoin@lists.dyne.org>
>> >>     https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/libbitcoin