[PD-dev] [leapmotion] 2.3.1 linking failure on Windows

[William Brent]

Great tips, thanks to you both!

On Tue, Jan 3, 2023 at 3:45 PM Christof Ressi <info at christofressi.com>
wrote:

> That said, would it be worth my time to try and set up a Visual Studio
> project and build against the old C++ library there?
>
> If you use CMake, you only have to specify the appropriate Visual Studio
> generator. That's it. You build your project with
>
> cmake --build .
>
> and it will automatically use the MSVC++ compiler. No need to open Visual
> Studio at all. (Of course, you have to install it.)
>
> ---
>
> Another thing you could do is write your own C wrapper library around the
> original Leap C++ library, build it with MSVC++ and then use that for your
> Pd external.
>
> Christof
> On 04.01.2023 02:31, William Brent wrote:
>
> Thanks IOhannes, this is helpful and it explains why I was able to link to
> the newest Leap library on Windows for the ultraleap external - that one is
> in straight C.
>
> That said, would it be worth my time to try and set up a Visual Studio
> project and build against the old C++ library there? I only have experience
> using VS with JUCE-generated projects so it would be a bit of a slog for me
> to try and set things up from a blank slate, but I'd be game if there's
> hope it'll work. I'm just trying to get this accessible to as many students
> as possible, and the old library offers tool and gesture tracking, which
> Leap has dropped in the new version.
>
>
> On Tue, Jan 3, 2023 at 3:13 PM IOhannes m zmölnig <zmoelnig at iem.at> wrote:
>
>> Am 3. Jänner 2023 23:10:59 MEZ schrieb William Brent <
>> william.brent at gmail.com>:
>> >
>> >x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>> >src/leapmotion.o:leapmotion.cpp:(.text+0x411): undefined reference to
>> >`Leap::Frame::timestamp() const'
>>
>> C++ is a fantastic language.
>> Unfortunately it is not really standardised on the binary level, which
>> basically means that you might not be able to use c++ libraries compiled
>> with one compiler/linker with binaries created by another compiler/linker.
>>
>> Now, clang kind of guarantees binary compatibility with g++ binaries,
>> which pretty much covers the Linux & macOS worlds.
>> Things are of course different on windows: you generally cannot mix&match
>> MSVC libraries with GCC binaries (and vice versa), at least if c++ is
>> involved.
>>
>> Proprietary SDKs often provide MSVC libraries.
>>
>> So if possible, try to use a C-library instead of a C++-library on
>> windows.
>>
>>
>> mfg.sfg.jfd
>> IOhannes
>>
>>
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>>
>
>
> --
> William Brent
>
> “Great minds flock together”
> Conflations: conversational idiom for the 21st century
>
> www.conflations.com
>
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-- 
William Brent

“Great minds flock together”
Conflations: conversational idiom for the 21st century

www.conflations.com
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