“在架构x86_64中找不到符号”，表示在C中使用CPLEX API的MEX文件
我目前正在MATLAB中编写一个MEX文件，它使用C语言中的CPLEX API来解决线性编程问题。 不幸的是，当我尝试编译并且我不知道如何解决它时，我遇到了“找不到架构x86_64的符号”问题。
一些基本信息：
- 我可以编译
yprime.c和其他不使用CPLEX API的MEX文件 - 我在Mac OSX 10.7.2上使用MATLAB 2011b
- 我使用的是XCode 4.2中包含的GCC 4.2软件包。
- 我已经应用了XCode 4.2 Patch for MATLAB
我非常感谢人们可能提出的任何建议。 我在下面列出了一份详细的错误报告。
-> mexopts.sh sourced from directory (DIR = $PREF_DIR) FILE = /Users/berk/.matlab/R2011b/mexopts.sh ---------------------------------------------------------------- -> MATLAB = /Applications/MATLAB_R2011b.app -> CC = llvm-gcc-4.2 -> CC flags: CFLAGS = -fno-common -no-cpp-precomp -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk -mmacosx-version-min=10.5 -fexceptions -Wall CDEBUGFLAGS = -g COPTIMFLAGS = -O2 -DNDEBUG CLIBS = -L/Applications/MATLAB_R2011b.app/bin/maci64 -lmx -lmex -lmat -lstdc++ arguments = -DMX_COMPAT_32 -> CXX = llvm-g++-4.2 -> CXX flags: CXXFLAGS = -fno-common -no-cpp-precomp -fexceptions -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk -mmacosx-version-min=10.5 CXXDEBUGFLAGS = -g CXXOPTIMFLAGS = -O2 -DNDEBUG CXXLIBS = -L/Applications/MATLAB_R2011b.app/bin/maci64 -lmx -lmex -lmat -lstdc++ arguments = -DMX_COMPAT_32 -> FC = gfortran -> FC flags: FFLAGS = -fexceptions -m64 -fbackslash FDEBUGFLAGS = -g FOPTIMFLAGS = -O FLIBS = -L/Applications/MATLAB_R2011b.app/bin/maci64 -lmx -lmex -lmat -L -lgfortran -L -lgfortranbegin arguments = -DMX_COMPAT_32 -> LD = llvm-gcc-4.2 -> Link flags: LDFLAGS = -Wl,-twolevel_namespace -undefined error -arch x86_64 -Wl,-syslibroot,/Developer/SDKs/MacOSX10.6.sdk -mmacosx-version-min=10.5 -bundle -Wl,-exported_symbols_list,/Applications/MATLAB_R2011b.app/extern/lib/maci64/mexFunction.map LDDEBUGFLAGS = -g LDOPTIMFLAGS = -O LDEXTENSION = .mexmaci64 arguments = -> LDCXX = -> Link flags: LDCXXFLAGS = LDCXXDEBUGFLAGS = LDCXXOPTIMFLAGS = LDCXXEXTENSION = arguments = ---------------------------------------------------------------- -> llvm-gcc-4.2 -c -I/Users/berk/Applications/IBM/ILOG/CPLEX_Studio_Academic123/cplex/include/ilcplex/ -I/Applications/MATLAB_R2011b.app/extern/include -I/Applications/MATLAB_R2011b.app/simulink/include -DMATLAB_MEX_FILE -fno-common -no-cpp-precomp -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk -mmacosx-version-min=10.5 -fexceptions -Wall -DMX_COMPAT_32 -O2 -DNDEBUG "addcutsmx.c" addcutsmx.c:488:4: warning: "/*" within comment addcutsmx.c:37: warning: 'free_and_null' declared 'static' but never defined addcutsmx.c:38: warning: 'usage' declared 'static' but never defined -> llvm-gcc-4.2 -O -Wl,-twolevel_namespace -undefined error -arch x86_64 -Wl,-syslibroot,/Developer/SDKs/MacOSX10.6.sdk -mmacosx-version-min=10.5 -bundle -Wl,-exported_symbols_list,/Applications/MATLAB_R2011b.app/extern/lib/maci64/mexFunction.map -o "addcutsmx.mexmaci64" addcutsmx.o -L/Applications/MATLAB_R2011b.app/bin/maci64 -lmx -lmex -lmat -lstdc++ Undefined symbols for architecture x86_64: "_CPXLopenCPLEX", referenced from: _mexFunction in addcutsmx.o "_CPXLcreateprob", referenced from: _mexFunction in addcutsmx.o "_CPXLchgobjsen", referenced from: _mexFunction in addcutsmx.o "_CPXLnewcols", referenced from: _mexFunction in addcutsmx.o "_CPXLaddrows", referenced from: _mexFunction in addcutsmx.o "_CPXLlpopt", referenced from: _mexFunction in addcutsmx.o "_CPXLsolution", referenced from: _mexFunction in addcutsmx.o "_CPXLgetbase", referenced from: _mexFunction in addcutsmx.o ld: symbol(s) not found for architecture x86_64 collect2: ld returned 1 exit status mex: link of ' "addcutsmx.mexmaci64"' failed. Error using mex (line 206) Unable to complete successfully.
您似乎缺少-lcplex或系统上-lcplex的相关链接指令。
用户手册说明正确的包含和链接参数在您的cplex发行版的readme.html中，以及示例项目和makefile。
从使用Cplex和Matlab，它表示您已指定完整的库链接路径和包含路径。 根据您的操作，您可能还需要为mex指定-lilocplex 。
例如mex -I/cplex_include_fullpath -L/cplex_library_fullpath -lcplex file.c