loadlibrary and loaddefinedlibrary: undefined (mangled) symbol

Preconditions:

• ArchLinux, x64

I have downloaded RSA_API x64 library for communication with Tektronix RSA spectrum analyser, which comes in several files: libRSA_API.so, RSA_API.h, libcyusb_shared.so and some examples in C and Python. C example is compiled with -lRSA_API and -lcyusb_shared flags (with an -L pointing to .so locations). Both examples work perfectly fine (should run with LD_LIBRARY_PATH set to so locations).

The problem:

loadlibrary('libRSA_API', 'RSA_API.h') results in following errors:

Error using loadlibrary

There was an error loading the library

"/the/location/of/so/files/libRSA_API.so"

/the/location/of/so/files/libRSA_API.so: undefined symbol:

_Z18cyusb_download_fx3P20libusb_device_handlePKc

Error in untitled (line 10)

[notfound, warnings]=loadlibrary('libRSA_API', 'RSA_API_no_bool.h');

Caused by:

Error using loaddefinedlibrary

/the/location/of/so/files/libRSA_API.so: undefined symbol:

_Z18cyusb_download_fx3P20libusb_device_handlePKc

The question:

What can I do to force matlab to resolve this undefined symbol? I've tried to mess with mex_C_glnxa64.xml inserting -lcyusb_shared and -L/path/ into various flags, setting LD_LIBRARY_PATH from matlab to no avail. Any help is welcome!

Appendix:

Inspecting the library files gives this results:

$ nm -Dg /the/location/of/so/files/libRSA_API.so | grep _Z18cyusb_download_fx3P20libusb_device_handlePKc

U _Z18cyusb_download_fx3P20libusb_device_handlePKc

$ nm -Dg /the/location/of/so/files/libcyusb_shared.so | grep _Z18cyusb_download_fx3P20libusb_device_handlePKc

0000000000004c23 T _Z18cyusb_download_fx3P20libusb_device_handlePKc

$ ldd /the/location/of/so/files/libRSA_API.so

linux-vdso.so.1 (0x00007fff517f9000)

libusb-1.0.so.0 => /usr/lib/libusb-1.0.so.0 (0x00007ff8b31db000)

libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007ff8b2ffe000)

libm.so.6 => /usr/lib/libm.so.6 (0x00007ff8b2eb8000)

libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007ff8b2e9e000)

libc.so.6 => /usr/lib/libc.so.6 (0x00007ff8b2cd5000)

libudev.so.1 => /usr/lib/libudev.so.1 (0x00007ff8b2cae000)

libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007ff8b2c8a000)

/usr/lib64/ld-linux-x86-64.so.2 (0x00007ff8b506b000)

$ ldd /the/location/of/so/files/libcyusb_shared.so

linux-vdso.so.1 (0x00007ffdd07c9000)

libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007fcaaff32000)

libc.so.6 => /usr/lib/libc.so.6 (0x00007fcaafd69000)

/usr/lib64/ld-linux-x86-64.so.2 (0x00007fcab018c000)

I am not that experienced with linking and shared libraries, but if ldd doesn't see the libcyusb_shared dependency, then matlab probably wouldn't too.

I am not planning to use the library directly, but as a part of Instrument Control Tollbox. The loadlibrary is a part of init script from Tektronix USB Spectrum Analyzer Driver.