我已经下载了下面的代码 ：
CVPR 2014十字路口联合优化代码
cvpr2014-iou-code-1.0.zip
http://research.microsoft.com/en-us/downloads/e164fe21-ef2b-4e34-98c1-4868968abb06/
我得到的是两个文件夹，一个叫src/ ，另一个叫matlab/ 。 我正在运行Linux Fedora 19，我可以在src/编译代码src/很好。 当我尝试在matlab/编译代码时出现问题。
自述文件说：
Matlab compilation ------------------ From within Matlab, configure the compiler using "mex -setup", then adjust the paths in matlab\compile_windows.m or matlab/compile_linux.m scripts and run either "compile_linux.m" or "compile_windows.m" in the "matlab" directory.
对于Linux更具体：
Linux ===== From within Matlab run "mex -setup", then edit the mexopts.sh file and modify the settings CXXFLAGS='-std=c++11 -fopenmp -march=native -D_GNU_SOURCE' CXXLIBS="$RPATH $MLIBS -lm -lgomp" CXXOPTIMFLAGS='-Ofast -DNDEBUG' This will enable OpenMP and C++11 and should work from G++ 4.7 onwards. From the matlab/ directory, call compile_linux to build all mex files.
所以我打开matlab并运行mex -setup 。 我对这个问题回答yes ：
>> mex -setup Options files control which compiler to use, the compiler and link command options, and the runtime libraries to link against. Using the 'mex -setup' command selects an options file that is placed in /user/wok/home/.matlab/R2012b and used by default for 'mex'. An options file in the current working directory or specified on the command line overrides the default options file in /user/wok/home/.matlab/R2012b. To override the default options file, use the 'mex -f' command (see 'mex -help' for more information). The options files available for mex are: 1: /opt/matlab2012b/bin/mexopts.sh : Template Options file for building gcc MEX-files 0: Exit with no changes Enter the number of the compiler (0-1): 1 Overwrite /user/wok/home/.matlab/R2012b/mexopts.sh ([y]/n)? y /opt/matlab2012b/bin/mexopts.sh is being copied to /user/wok/home/.matlab/R2012b/mexopts.sh ************************************************************************** Warning: The MATLAB C and Fortran API has changed to support MATLAB variables with more than 2^32-1 elements. In the near future you will be required to update your code to utilize the new API. You can find more information about this at: http://www.mathworks.com/help/techdoc/matlab_external/bsflnue-1.html Building with the -largeArrayDims option enables the new API. **************************************************************************
然后，我编辑文件/user/wok/home/.matlab/R2012b/mexopts.sh ，然后按照README中的说明进行操作：
CXX='g++' CXXFLAGS='-ansi -D_GNU_SOURCE' CXXFLAGS="$CXXFLAGS -D_FILE_OFFSET_BITS=64" CXXFLAGS="$CXXFLAGS -fPIC -pthread" CXXLIBS="$RPATH $MLIBS -lm" CXXOPTIMFLAGS='-O -DNDEBUG' CXXDEBUGFLAGS='-g'
变为：
CXX='g++' CXXFLAGS='-std=c++11 -fopenmp -march=native -D_GNU_SOURCE' CXXLIBS="$RPATH $MLIBS -lm -lgomp" CXXOPTIMFLAGS='-Ofast -DNDEBUG' CXXDEBUGFLAGS='-g'
在这一步之后，我打开matlab并编辑compile_linux.m来添加Boost的path：
% You need to have boost 1.49 or higher installed (package libboost-dev on % most distributions) % % Tested on Ubuntu 13.10, Matlab R2012b, gcc 4.8.1 % TODO: this assumes that boost headers are available in /usr/include, as on % most systems. If you manually installed boost, please add -I/path/to/boost mex -v -O ... -output mex_voc_optimize -I../src ... -I/user/wok/home/Softwares/Boost_1.54/include/boost ... mex_voc_optimize.cpp matlab_helpers.cpp ... -largeArrayDims
编辑：在Praetorian的第一个评论之后，我添加了-v标志。
最后，我运行compile_linux ，只是为了得到一长串的错误，我已经缩短并粘贴在下面：
>> compile_linux -> mexopts.sh sourced from directory (DIR = $PREF_DIR) FILE = /user/wok/home/.matlab/R2012b/mexopts.sh ---------------------------------------------------------------- -> MATLAB = /opt/matlab2012b -> 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,/opt/matlab2012b/bin/glnxa64 -L/opt/matlab2012b/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++ arguments = -> CXX = g++ -> CXX flags: CXXFLAGS = -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread CXXDEBUGFLAGS = -g CXXOPTIMFLAGS = -O -DNDEBUG CXXLIBS = -Wl,-rpath-link,/opt/matlab2012b/bin/glnxa64 -L/opt/matlab2012b/bin/glnxa64 -lmx -lmex -lmat -lm arguments = -> FC = gfortran -> FC flags: FFLAGS = -fexceptions -fbackslash -fPIC -fno-omit-frame-pointer FDEBUGFLAGS = -g FOPTIMFLAGS = -O FLIBS = -Wl,-rpath-link,/opt/matlab2012b/bin/glnxa64 -L/opt/matlab2012b/bin/glnxa64 -lmx -lmex -lmat -lm arguments = -> LD = g++ -> Link flags: LDFLAGS = -pthread -shared -Wl,--version-script,/opt/matlab2012b/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 "4.8.2". The version currently supported with MEX is "4.4.6". For a list of currently supported compilers see: http://www.mathworks.com/support/compilers/current_release/ -> g++ -c -I../src -I/user/wok/home/Softwares/Boost_1.54/include/boost -I/opt/matlab2012b/extern/include -I/opt/matlab2012b/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread -O -DNDEBUG "mex_voc_optimize.cpp" In file included from /usr/include/c++/4.8.2/cstdint:35:0, from mex_voc_optimize.cpp:8: /usr/include/c++/4.8.2/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options. #error This file requires compiler and library support for the \ ^ In file included from ../src/lfp.h:18:0, from ../src/voc.h:15, from mex_voc_optimize.cpp:19: ../src/timing.h:15:2: error: 'chrono' in namespace 'std' does not name a type std::chrono::time_point<std::chrono::high_resolution_clock> start_time; ^ ../src/timing.h: In member function 'double timer::elapsed_this_period() const': ../src/timing.h:20:8: error: 'std::chrono' has not been declared std::chrono::time_point<std::chrono::high_resolution_clock> end_time ^ ../src/timing.h:20:32: error: 'std::chrono' has not been declared std::chrono::time_point<std::chrono::high_resolution_clock> end_time
直到
../src/voc.h:418:31: note: 'P' declared here, later in the translation unit alpha[k_best] += P(j,k_best); ^ ../src/voc.h: In instantiation of 'std::pair<double, double> voc::prediction_function<TFloat>::compute_objective_c(int) const [with TFloat = double]': ../src/voc.h:328:56: required from 'double voc::prediction_function<TFloat>::compute_objective() const [with TFloat = double]' mex_voc_optimize.cpp:250:39: required from here ../src/voc.h:315:17: error: 'P' was not declared in this scope A_c += P(i,c); ^ ../src/voc.h:318:17: error: 'P' was not declared in this scope D_c += P(i,c); ^ mex: compile of ' "mex_voc_optimize.cpp"' failed. Error using mex (line 206) Unable to complete successfully. Error in compile_linux (line 9) mex -O ... >>
我已经尝试编辑代码，以删除每个调用chrono （定时器），然后用map等取代unordered_map ，但它是一个痛苦。 我想能够在matlab/编译mex文件matlab/就像我可以在src/
感谢Praetorian的评论，我可以指出这个问题。 我在mexopts.sh编辑了错误的行。 事实上， CXXFLAGS出现在3个不同的地方，我首先编辑了国旗，但是在第二位编辑它是必要和足够的（第一位是诱饵）。
例如见：
$ grep -n CXXLIBS /user/wok/home/.matlab/R2012b/mexopts.sh 74: CXXLIBS="$RPATH $MLIBS -lm" 129: CXXLIBS="$RPATH $MLIBS -lm" 199: CXXLIBS="$MLIBS -lstdc++"
所以我编辑了129行左右的行
CXX='g++' CXXFLAGS='-ansi -D_GNU_SOURCE' CXXFLAGS="$CXXFLAGS -fPIC -fno-omit-frame-pointer -pthread" CXXLIBS="$RPATH $MLIBS -lm" CXXOPTIMFLAGS='-O -DNDEBUG' CXXDEBUGFLAGS='-g'
成为
CXX='g++' CXXFLAGS='-std=c++11 -fopenmp -march=native -D_GNU_SOURCE' CXXFLAGS="$CXXFLAGS -fPIC -fno-omit-frame-pointer -pthread" CXXLIBS="$RPATH $MLIBS -lm -lgomp" CXXOPTIMFLAGS='-Ofast -DNDEBUG' CXXDEBUGFLAGS='-g'