_______________________________________________Hey,
this can also happen when an auxiliary library cannot be found. You can check missing dependencies with the Dependencies program (modern successor to Dependency Walker): https://github.com/lucasg/Dependencies
Christof
On 05.01.2023 19:48, William Brent wrote:
Hi again, I've got a successful build using cmake, but now I've run into another issue. The external loads and works just fine in Pd on the windows machine I compiled with, but fails on another machine with:
"leapmotion.dll: The specified module could not be found. (126)"
I know this is the error thrown when the necessary .dll is missing (in this case, Leap.dll), but I have Leap.dll in the same directory as my leapmotion.dll binary. Both machines are running 64-bit Windows 10 using Pd 0.53-1 (amd64-32). Both have the 2.3.1 Leap Service software installed. I've triple-checked everything I can think of...any ideas?
On Tue, Jan 3, 2023 at 4:19 PM Christof Ressi <info@christofressi.com> wrote:
_______________________________________________To be more specific, the linker error itself is most likely caused by name mangling differences. When you include the header file in your project, the class/function definitions use your compiler's name mangling, but the accompanying DLL has been built with another compiler, using a different name mangling scheme.
Seems like there is also a C API: https://docs.ultraleap.com/tracking-api/leapc-guide.html
For the sake of completeness: yes, that's true for the typical case, but there are techniques for creating binary compatible C++ interfaces. The most prominent one is COM. Other examples that come to my mind are the VST3 SDK or openvr SDK.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.
On 03.01.2023 21:12, IOhannes m zmölnig wrote:
Am 3. Jänner 2023 23:10:59 MEZ schrieb William Brent <william.brent@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 _______________________________________________ Pd-dev mailing list Pd-dev@lists.iem.at https://lists.puredata.info/listinfo/pd-dev
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