.so libraries not linking correctly when I try to build a plugin

[shaneasimms]

I'm trying to get a V-Ray repo started at work so I can start making some custom texture plugins. I'm working with Linux CentOS Linux release 7.4.1708 (Core), Maya 2018.4.P07, V-Ray Next for Maya, update 1 (v4.12.01.29159), building with rez.

I'm trying to start with a simple example, the Fresnel texture plugin, but it seems that any .so library I point to in CMakeLists.txt isn't getting found when I load my plugin from Maya's plug-in manager:

// Error: file: /library/rez/ext_packages/app_maya/2018.4.7.2/platform-linux/ext/scripts/others/pluginWin.mel line 290: Unable to dynamically load : /net_home/shane.simms/local_packages/testing/0.0.1/platform-
linux/app_maya-2018/plugins/testing.so
libVRaySDKLibrary.so: cannot open shared object file: No such file or directory //
// Error: file: /library/rez/ext_packages/app_maya/2018.4.7.2/platform-linux/ext/scripts/others/pluginWin.mel line 290: libVRaySDKLibrary.so: cannot open shared object file: No such file or directory (testing) //

This only crops up when I use .so libraries (libVRaySDKLibrary.so in this case) - .a libraries don't give me any error messages.

The following is a simplified CMakeLists.txt, which only has one .so library, which gives me the above error (sorry, can't upload files from work so have to dump it here):

CMAKE_MINIMUM_REQUIRED(VERSION 3.3)
set(CMAKE_VERBOSE_MAKEFILE ON)

# this is the cmake module used to build maya plugins
include($ENV{DEVKIT_LOCATION}/cmake/pluginEntry.cmake)
include_directories(/net_home/shane.simms/git/testing/include)
include_directories(/net_home/shane.simms/git/testing/vraymaya/texfresnel/)
include_directories(/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/include)

# set project
set(PROJECT_NAME testing)
set(CMAKE_STATIC_LIBRARY_PREFIX "")

# set SOURCE_FILES
set(
    SOURCE_FILES
        vray/vray_texfresnel/tex_fresnel.cpp
        vraymaya/texfresnel/maya_pluginmain.cpp
        vraymaya/texfresnel/maya_tex_fresnel.cpp
)

set(treeparser_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libtreeparser_s.a")
set(plugman_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libplugman_s.a")
set(jpeg_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libjpeg_s.a")
set(partio_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libpartio_s.a")
set(VRaySDKLibrary_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libVRaySDKLibrary.so") # so
set(imagesamplers_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libimagesamplers_s.a")
set(putils_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libputils_s.a")
set(tiff_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libtiff_s.a")
set(bmputils_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libbmputils_s.a")
set(meshes_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libmeshes_s.a")
set(rayserver_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/librayserver_s.a")
set(vrmat_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libvrmat_s.a")
set(alembic_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libalembic_s.a")
set(glvm_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libglvm_s.a")
set(vrscene_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libvrscene_s.a")
set(libpng_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/liblibpng_s.a")
set(meshinfosubdivider_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libmeshinfosubdivider_s.a")
set(osdCPU_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libosdCPU_s.a")
set(pimglib_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libpimglib_s.a")
set(openexr_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libopenexr_s.a")
set(vutils_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libvutils_s.a")
set(geolib_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libgeolib_s.a")
set(pnet_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libpnet_s.a")
set(ptex_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libptex_s.a")
set(curl_s_PATH "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libcurl_s.a")
set(VRAYMAYA_LIB "/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib")

# add_executable(main vraymaya/texfresnel/maya_pluginmain.cpp)
# target_link_libraries(main /library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/libplugman_s.a)
set(
    LIB_DIRS
        ${VRAYMAYA_LIB}
)

# Load libraries
link_directories(${LIB_DIRS})
# set required libraries
set(
    LIBRARIES
        OpenMaya
        Foundation
        treeparser_s
        plugman_s
        resman_s
        jpeg_s
        partio_s
        VRaySDKLibrary # so
        imagesamplers_s
        putils_s
        tiff_s
        bmputils_s
        meshes_s
        rayserver_s
        vrmat_s
        alembic_s
        glvm_s
        vrscene_s
        libpng_s
        meshinfosubdivider_s
        osdCPU_s
        pimglib_s
        openexr_s
        vutils_s
        geolib_s
        pnet_s
        ptex_s
        curl_s
)
# Build the plugin
build_plugin()
# install the plugins
install(
    TARGETS
        testing
    DESTINATION
        plugins
)
install(
    FILES
        shaders/vraytexfresnel.txt
    DESTINATION
        shaders
)
# rez-2.18 onwards doesn't provide a default install target
# we have to provide a phony one
install(CODE "")

Any advice on this would be hugely appreciated, please let me know if there are any details I missed out.

[asparuh.krastev]

Hi,

Please try to add the absolute directories of any .so files to the LD_LIBRARY_PATH env var prior to launching Maya from the terminal e.g.:

export LD_LIBRARY_PATH=/library/rez/ext_packages/vray_maya/4.12.01.29159.0/platform-linux/app_maya-2018/vray/lib/

Then run Maya from the same terminal

[shaneasimms]

Thanks for your response!

I've ensured that LD_LIBRARY_PATH is pointing to the correct place, and have spent some time cleaning up CMakeLists.txt, but still getting errors.

New CMakeLists.txt:

CMAKE_MINIMUM_REQUIRED(VERSION 3.3)
set(CMAKE_VERBOSE_MAKEFILE ON)


# this is the cmake module used to build maya plugins
include($ENV{DEVKIT_LOCATION}/cmake/pluginEntry.cmake)

# set project
set(PROJECT_NAME testing)

# vray_maya include dir
include_directories($ENV{REZ_VRAY_MAYA_ROOT}/vray/include)

# set source files
set(
    SOURCE_FILES
        vray/vray_texfresnel/tex_fresnel.cpp
        vraymaya/texfresnel/maya_pluginmain.cpp
        vraymaya/texfresnel/maya_tex_fresnel.cpp
)

# set library dirs
set(
    LIBRARY_DIRS
        $ENV{REZ_VRAY_MAYA_ROOT}/vray/lib
       $ENV{REZ_VRAY_MAYA_ROOT}/maya_root/lib
)

# set required libraries
set(
    LIBRARIES
        OpenMaya
        Foundation
        treeparser_s
        plugman_s
        resman_s
        jpeg_s
        partio_s
        VRaySDKLibrary
        imagesamplers_s
        nvrtc
        putils_s
        vray
        tiff_s
        vrayfreeimage
        vraymdl
        bmputils_s
        meshes_s
        rayserver_s
        vrmat_s
        alembic_s
        vrayosl
        glvm_s
        vrscene_s
        libpng_s
        vray_gpu_common
        nvrtc-builtins
        meshinfosubdivider_s
        osdCPU_s
        pimglib_s
        openexr_s
        vutils_s
        vrayopenimageio
        geolib_s
        pnet_s
        ptex_s
        curl_s
)

# Build the plugin
build_plugin()

# install the plugins
install(
    TARGETS
        testing
    DESTINATION
        plugins
)

install(
    FILES
        shaders/vraytexfresnel.txt
    DESTINATION
        shaders
)


# rez-2.18 onwards doesn't provide a default install target
# we have to provide a phony one
install(CODE "")

Now Maya is complaining that libnvrtc.so is missing, I assume it wasn't complaining about it before because I wasn't including it, but the missing libraries are always the .so ones for some reason.

[asparuh.krastev]

Hi,

I'm assuming the first error is hopefully solved.
The Maya error appears to be of the same kind - the Maya executable can not find the library, which contains executable code it needs to use while running.

Since this library is part of Nvidia CUDA toolkit, first make sure it's installed properly.
If this is already done, I suggest to look for the library location and make sure the OS is aware of it. One way is again to add it in the LD_LIBRARY_PATH var, using the : separator.

Also check this thread for more thorough guide about dynamic libs:
https://unix.stackexchange.com/quest...cts-at-runtime

Hope this helps. If you have more issues, please let me know.

[shaneasimms]

Sorry Asparuh, I wasn't very clear. The first error isn't solved, I made sure LD_LIBRARY_PATH was getting set correctly and all libraries were being pointed to but was still getting the errors. It's not just CUDA libraries, it's still everything with an .so extension that isn't being found.

If I remove the CUDA stuff, Maya gives an undefined symbol error, for

VUtils::GetNumDescs()

- I believe that this is part of VRaySDKLibrary.

I'm not very experienced with cmake so apologies if I'm missing anything here. I've had several TDs at work take a look at this and no-one can figure out why I'm getting these errors.

Thanks for the thread, I've had a read through but as I said, I'm quite sure LD_LIBRARY_PATH is pointing to the .so libraries. Is there anything else I could be missing?

[asparuh.krastev]

Hi, Shane

Meanwhile you can check our cmake project that comes with the installation (samples subfolder) and see if you like it. It's an end-user cmake sample project. We support this one. See if it gives you errors.
The one that you use is Maya devkit based and might have some issues as we don't support it. Also it's a bit hard to reporoduce it on my side as the files you provide are not the complete set.
Try our sample project and let me know if that works for you.

Regards