error: undefined reference to `ConstructCompiler(EShLanguage, int)'

[chingi071]

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Hello, I installed ncnn on jetson nano and compiled the NCNN example on QT, but the following problems occurred. Excuse me, is there a file that I missed that caused this problem?

I follow the steps below to compile ncnn on jetson nano.

$ git submodule update --depth=1 --init $ cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/jetson.toolchain.cmake \ -DNCNN_BUILD_EXAMPLES=ON \ -DNCNN_BUILD_TOOLS=ON \ -DNCNN_VULKAN=ON \ -DNCNN_SYSTEM_GLSLANG=ON \ -DCMAKE_BUILD_TYPE=Release \ -DNCNN_DISABLE_RTTI=OFF .. $ make -j4 $ sudo make install

My QT compilation settings are as follows.

SOURCES += test.cpp

INCLUDEPATH += /home/user/ncnn/build/install/include/ncnn
/home/user/ncnn/build/install/include/glslang
/home/user/ncnn/build/install/include/glslang/Include
/home/user/ncnn/build/install/include/glslang/MachineIndependent
/home/user/ncnn/build/install/include/glslang/MachineIndependent/preprocessor
/home/user/ncnn/build/install/include/glslang/Public
/home/user/ncnn/build/install/include/glslang/SPIRV
/usr/include/opencv4
/usr/include/opencv4/opencv2

LIBS += /home/user/ncnn/build/install/lib/libncnn.a
/home/user/ncnn/build/install/lib/libglslang.a
/home/user/ncnn/build/install/lib/libGenericCodeGen.a
/home/user/ncnn/build/install/lib/libMachineIndependent.a
/home/user/ncnn/build/install/lib/libOGLCompiler.a
/home/user/ncnn/build/install/lib/libOSDependent.a
/home/user/ncnn/build/install/lib/libSPIRV.a
/usr/lib/aarch64-linux-gnu/libopencv_*.so.4.1
/usr/lib/aarch64-linux-gnu/libvulkan.so.1.2

QMAKE_CXXFLAGS += -fopenmp QMAKE_LFLAGS += -fopenmp LIBS += -fopenmp

[cyinen]

Hello,Did you solve the problem?I meet the same problem.

[Z-Xiong]

-lglslang -lshaderc_shared

[abaghiyan]

Building as a shared lib solved similar problem. Check in CmakeList.txt: #option(NCNN_SHARED_LIB "shared library support" OFF) change to option(NCNN_SHARED_LIB "shared library support" ON)

[EricTonyLiu]

Building as a shared lib solved similar problem. Check in CmakeList.txt: #option(NCNN_SHARED_LIB "shared library support" OFF) change to option(NCNN_SHARED_LIB "shared library support" ON)

I try this but it seems not working

[abaghiyan]

Building as a shared lib solved similar problem. Check in CmakeList.txt: #option(NCNN_SHARED_LIB "shared library support" OFF) change to option(NCNN_SHARED_LIB "shared library support" ON)

This type of build may affect some detectors leading to incorrect results. For instance, on yolov4 example I got negative detection rect coordinates (from output ncnn::Mat of extractor) and many false positives. So this solves linking issues but also leads to risks and inaccuracies for several detectors.

[jinzhongmin]

我在cgo链接时也遇到了类似的问题，我通过调整链接库的顺序，通过了编译 也许你可以按这个顺序试试

[zxpzhong]

我在cgo链接时也遇到了类似的问题，我通过调整链接库的顺序，通过了编译 也许你可以按这个顺序试试

that works!