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我已經下載the following code：錯誤編譯C++時在Matlab的MEX 11代碼文件
CVPR 2014交集過工會優化代碼
cvpr2014-iou-code-1.0.zip
http://research.microsoft.com/en-us/downloads/e164fe21-ef2b-4e34-98c1-4868968abb06/
我得到的是兩個文件夾歸檔，一個叫src/和另一個稱爲matlab/。我運行的是Linux Fedora 19，我可以在src/中編譯代碼。當我嘗試在matlab/中編譯代碼時出現問題。
自述說：
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.
更特別版：
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 $MLIBS -lm -lgomp" CXXOPTIMFLAGS='-Ofast -DNDEBUG' This will enable OpenMP and C++11 and should work from G++ 4.7 onwards. From the matlab/ directory, call compile_linux to build all mex files.
於是我打開matlab和運行mex -setup。我回答yes的問題：
>> mex -setup
Options files control which compiler to use, the compiler and link command
options, and the runtime libraries to link against.
Using the 'mex -setup' command selects an options file that is
placed in /user/wok/home/.matlab/R2012b and used by default for 'mex'. An options
file in the current working directory or specified on the command line
overrides the default options file in /user/wok/home/.matlab/R2012b.
To override the default options file, use the 'mex -f' command
(see 'mex -help' for more information).
The options files available for mex are:
1: /opt/matlab2012b/bin/mexopts.sh :
Template Options file for building gcc MEX-files
0: Exit with no changes
Enter the number of the compiler (0-1):
1
Overwrite /user/wok/home/.matlab/R2012b/mexopts.sh ([y]/n)?
y
/opt/matlab2012b/bin/mexopts.sh is being copied to
/user/wok/home/.matlab/R2012b/mexopts.sh
**************************************************************************
Warning: The MATLAB C and Fortran API has changed to support MATLAB
variables with more than 2^32-1 elements. In the near future
you will be required to update your code to utilize the new
API. You can find more information about this at:
http://www.mathworks.com/help/techdoc/matlab_external/bsflnue-1.html
Building with the -largeArrayDims option enables the new API.
**************************************************************************
然後我編輯的文件/user/wok/home/.matlab/R2012b/mexopts.sh，我遵循的自述文件的說明：
CXX='g++' CXXFLAGS='-ansi -D_GNU_SOURCE' CXXFLAGS="$CXXFLAGS -D_FILE_OFFSET_BITS=64" CXXFLAGS="$CXXFLAGS -fPIC -pthread" CXXLIBS="$RPATH $MLIBS -lm" CXXOPTIMFLAGS='-O -DNDEBUG' CXXDEBUGFLAGS='-g'
變爲：
CXX='g++' CXXFLAGS='-std=c++11 -fopenmp -march=native -D_GNU_SOURCE' CXXLIBS="$RPATH $MLIBS -lm -lgomp" CXXOPTIMFLAGS='-Ofast -DNDEBUG' CXXDEBUGFLAGS='-g'
這一步後，我打開matlab和編輯compile_linux.m添加的路徑來提高：
% 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
編輯：繼從禁衛軍第一條評論，我已經添加了-v標誌。
最後我跑compile_linux，只得到錯誤的一個長長的清單，我已經縮短，粘貼下面：
>> 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 ...
>>
我曾嘗試編輯代碼以刪除每致電chrono（定時器），然後用map等代替unordered_map，但這是一種痛苦。我想能夠編譯MEX文件中matlab/就像我在src/
添加'-v'到mex命令行來調用它詳細模式，你應該能夠看到mex傳遞給gcc的文件和選項。 – Praetorian 2014-09-03 16:16:18
感謝您的建議，我編輯了這個問題。由於某些原因，雖然我編輯了正確的文件，但CXX標誌看起來不對。 – Wok 2014-09-03 16:20:25
看來CXX標誌在'mexopts.sh'文件中多次出現，並且我沒有編輯過所有這些標誌。 – Wok 2014-09-03 16:23:09