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我編譯一些CUDA/C爲在Matlab一個MEX庫運行，我收到以下錯誤：未定義參考用Matlab/CUDA MEX __cxa_atexit
Error using mex
/usr/lib/x86_64-linux-gnu/libc_nonshared.a(atexit.oS): In function `atexit':
(.text+0x12): undefined reference to `__cxa_atexit'
collect2: error: ld returned 1 exit status
我假設這個手段我需要鏈接一些額外的庫，但是什麼？
我目前的編譯命令是：
mex -L/usr/local/cuda/lib64 -lcudart -I./ A.cpp B.cpp C.cu D.cpp
我有幾個內核編譯成MEX，有趣他們中的一些工作，他們中的一些沒有。我不會立即看到他們之間有什麼不同 - 我當然不會在我的來源的任何地方撥打atexit。
這裏是一個冗長MEX的輸出：
Verbose mode is on.
Neither -compatibleArrayDims nor -largeArrayDims is selected.
Using -compatibleArrayDims. In the future, MATLAB will require the use of
-largeArrayDims and remove the -compatibleArrayDims option.
For more information:
http://www.mathworks.com/help/matlab/matlab_external/upgrading-mex-files-to-use-64-bit-api.html.
... Looking for compiler 'nvcc' ...
... Looking for environment variable 'MW_NVCC_PATH' ...Yes ('/usr/local/cuda-6.5/bin/nvcc').
... Looking for folder '/usr/local/cuda-6.5/bin' ...Yes.
... Looking for file '/usr/local/cuda-6.5/bin/nvcc' ...Yes.
... Executing command 'which g++' ...Yes ('/usr/bin/g++').
... Executing command 'g++ -print-file-name=libstdc++.so' ...Yes ('/usr/lib/gcc/x86_64-linux-gnu/4.8/libstdc++.so').
Found installed compiler 'nvcc'.
Options file details
-------------------------------------------------------------------
Compiler location: /usr/local/cuda-6.5/bin/nvcc
Options file: /home/nick/Documents/FrameLab/matlab/mex/source codes/mex_CUDA_glnxa64.xml
CMDLINE2 : /usr/bin/g++ -pthread -Wl,--no-undefined -shared -O -Wl,--version-script,"/usr/local/MATLAB/R2014a/extern/lib/glnxa64/mexFunction.map" /tmp/mex_86382821022260_3849/Atx_fan_mf.o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new.o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new_fb.o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new.o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new_fb.o /tmp/mex_86382821022260_3849/find_l.o /tmp/mex_86382821022260_3849/find_area.o -lcudart -L/usr/local/cuda/lib64 -Wl,-rpath-link,/usr/local/MATLAB/R2014a/bin/glnxa64 -L"/usr/local/MATLAB/R2014a/bin/glnxa64" -lmx -lmex -lmat -lm -lmwgpu /usr/local/MATLAB/R2014a/bin/glnxa64/libcudart.so.5.5 -o Atx_fan_mf.mexa64
CXX : /usr/local/cuda-6.5/bin/nvcc
DEFINES : -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE
MATLABMEX : -DMATLAB_MEX_FILE
NVCCFLAGS : -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS
CXXFLAGS : --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread
INCLUDE : -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/"
CXXOPTIMFLAGS : -O -DNDEBUG
CXXDEBUGFLAGS : -g
LDXX : /usr/bin/g++
LDFLAGS : -pthread -Wl,--no-undefined
LDTYPE : -shared
LINKEXPORT : -Wl,--version-script,"/usr/local/MATLAB/R2014a/extern/lib/glnxa64/mexFunction.map"
LINKLIBS : -lcudart -L/usr/local/cuda/lib64 -Wl,-rpath-link,/usr/local/MATLAB/R2014a/bin/glnxa64 -L"/usr/local/MATLAB/R2014a/bin/glnxa64" -lmx -lmex -lmat -lm -lmwgpu /usr/local/MATLAB/R2014a/bin/glnxa64/libcudart.so.5.5
LDOPTIMFLAGS : -O
LDDEBUGFLAGS : -g
OBJEXT : .o
LDEXT : .mexa64
NVCC : /usr/local/cuda-6.5/bin/nvcc
GCC : /usr/bin/g++
CPPLIB_DIR : /usr/lib/gcc/x86_64-linux-gnu/4.8/libstdc++.so
MATLABROOT : /usr/local/MATLAB/R2014a
ARCH : glnxa64
SRC : "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf.cpp";"/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_gpu_new.cu";"/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_gpu_new_fb.cu";"/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_cpu_new.cpp";"/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_cpu_new_fb.cpp";"/home/nick/Documents/FrameLab/matlab/mex/source codes/find_l.cpp";"/home/nick/Documents/FrameLab/matlab/mex/source codes/find_area.cpp"
OBJ : /tmp/mex_86382821022260_3849/Atx_fan_mf.o;/tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new.o;/tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new_fb.o;/tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new.o;/tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new_fb.o;/tmp/mex_86382821022260_3849/find_l.o;/tmp/mex_86382821022260_3849/find_area.o
OBJS : /tmp/mex_86382821022260_3849/Atx_fan_mf.o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new.o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new_fb.o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new.o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new_fb.o /tmp/mex_86382821022260_3849/find_l.o /tmp/mex_86382821022260_3849/find_area.o
SRCROOT : /home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf
DEF : /tmp/mex_86382821022260_3849/Atx_fan_mf.def
EXP : Atx_fan_mf.exp
LIB : Atx_fan_mf.lib
EXE : Atx_fan_mf.mexa64
ILK : Atx_fan_mf.ilk
MANIFEST : Atx_fan_mf.mexa64.manifest
TEMPNAME : Atx_fan_mf
EXEDIR :
EXENAME : Atx_fan_mf
OPTIM : -O -DNDEBUG
LINKOPTIM : -O
CMDLINE1_0 : /usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf.cpp" -o /tmp/mex_86382821022260_3849/Atx_fan_mf.o
CMDLINE1_1 : /usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_gpu_new.cu" -o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new.o
CMDLINE1_2 : /usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_gpu_new_fb.cu" -o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new_fb.o
CMDLINE1_3 : /usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_cpu_new.cpp" -o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new.o
CMDLINE1_4 : /usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_cpu_new_fb.cpp" -o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new_fb.o
CMDLINE1_5 : /usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/find_l.cpp" -o /tmp/mex_86382821022260_3849/find_l.o
CMDLINE1_6 : /usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/find_area.cpp" -o /tmp/mex_86382821022260_3849/find_area.o
CMDLINE3_0 : rm -f /tmp/mex_86382821022260_3849/Atx_fan_mf.o
CMDLINE3_1 : rm -f /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new.o
CMDLINE3_2 : rm -f /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new_fb.o
CMDLINE3_3 : rm -f /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new.o
CMDLINE3_4 : rm -f /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new_fb.o
CMDLINE3_5 : rm -f /tmp/mex_86382821022260_3849/find_l.o
CMDLINE3_6 : rm -f /tmp/mex_86382821022260_3849/find_area.o
-------------------------------------------------------------------
Building with 'nvcc'.
/usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf.cpp" -o /tmp/mex_86382821022260_3849/Atx_fan_mf.o
/usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_gpu_new.cu" -o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new.o
/usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_gpu_new_fb.cu" -o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new_fb.o
/usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_cpu_new.cpp" -o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new.o
/usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/Atx_fan_mf_cpu_new_fb.cpp" -o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new_fb.o
/usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/find_l.cpp" -o /tmp/mex_86382821022260_3849/find_l.o
/usr/local/cuda-6.5/bin/nvcc -c -DMX_COMPAT_32 --compiler-options=-D_GNU_SOURCE,-DMATLAB_MEX_FILE -I./ -I"/usr/local/MATLAB/R2014a/extern/include" -I"/usr/local/MATLAB/R2014a/toolbox/distcomp/gpu/extern/include/" -gencode=arch=compute_30,code=\"sm_30,compute_30\" $NVCC_FLAGS --compiler-options=-ansi,-fexceptions,-fPIC,-fno-omit-frame-pointer,-pthread -O -DNDEBUG "/home/nick/Documents/FrameLab/matlab/mex/source codes/find_area.cpp" -o /tmp/mex_86382821022260_3849/find_area.o
/usr/bin/g++ -pthread -Wl,--no-undefined -shared -O -Wl,--version-script,"/usr/local/MATLAB/R2014a/extern/lib/glnxa64/mexFunction.map" /tmp/mex_86382821022260_3849/Atx_fan_mf.o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new.o /tmp/mex_86382821022260_3849/Atx_fan_mf_gpu_new_fb.o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new.o /tmp/mex_86382821022260_3849/Atx_fan_mf_cpu_new_fb.o /tmp/mex_86382821022260_3849/find_l.o /tmp/mex_86382821022260_3849/find_area.o -lcudart -L/usr/local/cuda/lib64 -Wl,-rpath-link,/usr/local/MATLAB/R2014a/bin/glnxa64 -L"/usr/local/MATLAB/R2014a/bin/glnxa64" -lmx -lmex -lmat -lm -lmwgpu /usr/local/MATLAB/R2014a/bin/glnxa64/libcudart.so.5.5 -o Atx_fan_mf.mexa64
我想知道如果我應該嘗試使用不同版本的G ++或C++庫？我不知道如何改變CPPLIB_DIR變量... Matlab讓2014年更難以混淆mex設置。
感謝您的任何想法！
'__cxa_atexit'符號用於註冊靜態/全局對象的C++析構函數。你的版本不包括C++庫。也許嘗試運行'mex -setup C++'或手動指定合適的C++庫。 – 2014-09-22 05:48:09
試過運行'mex -setup C++'無濟於事。檢查Matlab網站後，顯然2014a不需要'mex -setup'步驟 - 它應該會自動檢測大量的編譯器設置。請參閱編輯的問題... – icurays1 2014-09-22 06:14:57
我不熟悉'mex'或'nvcc'，但它看起來像最後一行使用'g ++'來鏈接，所以應該使用C++庫。也許嘗試傳遞一個'Wl， - verbose'選項（我不知道如何指定它 - 也許在makefile中使用'LDFLAGS + = -Wl， - verbose'行）。實際上，您應該能夠在命令行中複製/粘貼日誌的最後一行 - 添加新選項。這應該會導致鏈接器轉儲有關它正在查找的每個庫的信息以及lib的位置。在這種情況下可能會有一大堆信息。 – 2014-09-22 06:57:06