:: Re: [Libbitcoin] Libbitcoin and Qt
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Autor: Eric Voskuil
Data:  
Dla: Bedeho Mender
CC: libbitcoin@lists.dyne.org
Temat: Re: [Libbitcoin] Libbitcoin and Qt
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>> 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>> 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