问题
Okay I am trying to compile a mex file on 64 bit linux, ubuntu to be precise with Matlab 2013a.
First it gave a error that it could not find GLIBCXX_3.4.15. Which was not part of the
/usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6. I found this thread /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found and succesfully created a symbolic link ln -s /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.17 libstdc++.so.6 in /usr/local/MATLAB/R2013a/sys/os/glnxa64
Now I tried to compile again and now I get /usr/bin/ld: cannot find -lstdc++
collect2: error: ld returned 1 exit status
This is the output
>> mex -v tload3.c
**************************************************************************
Warning: 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, see:
http://www.mathworks.com/help/matlab/matlab_external/upgrading-mex-files-to-use-64-bit-api.html
**************************************************************************
-> mexopts.sh sourced from directory (DIR = $PREF_DIR)
FILE = /home/wouter/.matlab/R2013a/mexopts.sh
----------------------------------------------------------------
-> MATLAB = /usr/local/MATLAB/R2013a
-> CC = gcc
-> CC flags:
CFLAGS = -ansi -D_GNU_SOURCE -fexceptions -fPIC -fno-omit-frame-pointer -pthread
CDEBUGFLAGS = -g
COPTIMFLAGS = -O -DNDEBUG
CLIBS = -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++
arguments = -DMX_COMPAT_32
-> CXX = g++
-> CXX flags:
CXXFLAGS = -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread
CXXDEBUGFLAGS = -g
CXXOPTIMFLAGS = -O -DNDEBUG
CXXLIBS = -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm
arguments = -DMX_COMPAT_32
-> FC = gfortran
-> FC flags:
FFLAGS = -fexceptions -fbackslash -fPIC -fno-omit-frame-pointer
FDEBUGFLAGS = -g
FOPTIMFLAGS = -O
FLIBS = -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm
arguments = -DMX_COMPAT_32
-> LD = gcc
-> Link flags:
LDFLAGS = -pthread -shared -Wl,--version-script,/usr/local/MATLAB/R2013a/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined
LDDEBUGFLAGS = -g
LDOPTIMFLAGS = -O
LDEXTENSION = .mexa64
arguments =
-> LDCXX =
-> Link flags:
LDCXXFLAGS =
LDCXXDEBUGFLAGS =
LDCXXOPTIMFLAGS =
LDCXXEXTENSION =
arguments =
----------------------------------------------------------------
Warning: You are using gcc version "4.7.3". The version
currently supported with MEX is "4.4.x".
For a list of currently supported compilers see:
http://www.mathworks.com/support/compilers/current_release/
-> gcc -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fexceptions -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "tload3.c"
-> gcc -O -pthread -shared -Wl,--version-script,/usr/local/MATLAB/R2013a/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined -o "tload3.mexa64" tload3.o -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++
/usr/bin/ld: cannot find -lstdc++
collect2: error: ld returned 1 exit status
mex: link of ' "tload3.mexa64"' failed.
Error using mex (line 206)
Unable to complete successfully.
ps there is a another thread with about the same title, Error building MEX-files (MATLAB 2012a) on Kubuntu '/usr/bin/ld: cannot find -lstdc++', unfortunatly the answer, installing sudo apt-get install libstdc++6-4.4-dev did not work for me.
回答1:
I had the same problem and this worked for me
Navigate to the following path cd /usr/local/MATLAB/R2013a/sys/os/glnxa64/, (your path might varies) then remove the libstdc library (or safer rename it)
sudo mv libstdc++.so.6 libstdc++.so.6.old
I have the same configuration, Ubuntu Linux 64 bit with Matlab 2013a
回答2:
Same problem here on Ubuntu 13.04 using MATLAB 2013a. I solved it doing:
sudo mv /usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6 /usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6.old
To keep a backup just in case.
And then a symbolic link:
sudo ln -s /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.17 /usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6
回答3:
Look at this line gcc -O -pthread -shared -Wl,--version-script,/usr/local/MATLAB/R2013a/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined -o "tload3.mexa64" tload3.o -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++.
The options with L are the places where gcc/the linker looks for libraries. Id sugest trying to put the symlink in /usr/local/MATLAB/R2013a/bin/glnxa64 ( libstdc++.so.6 is there in 2012a), and start matlab from a terminal, it spits some errors there. Or add the new folder as a CLIB argument.
And I also would delete the -ansi part for c ( replace it with -std=c99), so that it won't give you errors on using \ style comments in your c code.
回答4:
You created the link libstdc++.so.6 in /usr/local/MATLAB/R2013a/bin/glnxa64 to the library in your system, installed by apt-get install libstdc++6-4.4-dev .
Now try creating also a link named libstdc++.so to libstdc++.so.6 in
/usr/local/MATLAB/R2013a/bin/glnxa64.
回答5:
I had the same problem and none of the posted solutions worked for me (i.e. deleting or adding new symlinks), and it turned out that I hadn't installed the appropriate compiler package!
For me, the solution was:
sudo yum install gcc-g++
I'm running MATLAB 2014b on 64-bit Linux (RHEL 6).
来源：https://stackoverflow.com/questions/17000903/mex-compiling-on-64-bit-linux-usr-bin-ld-cannot-find-lstdc