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

[William Brent]

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

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