Question

我有一个matlab mex扩展，我想用Makefile编译。链接器似乎没有找到mex库。这是Makefile：

MEXSUFFIX  = mexa64
IX  = mexa64
MATLABHOME = /usr/local/MATLAB/R2013b
MEX        = g++
MEXCXX     = echo
CXX        = g++

CFLAGS = -fPIC -pthread -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fno-omit-frame-pointer -pthread -O3 -DNDEBUG

LIBS      = -lm
INCLUDE   = -I$(MATLABHOME)/extern/include -Icommon
#g++
MEXFLAGS =  -shared -Wl,--no-undefined -Wl,-rpath-link,$(MATLABHOME)/bin/glnxa64 -L$(MATLABHOME)/bin/glnxa64 -lmx -lmex -lmat -lm

PROJECTS = residualfm
MEXDIR = ..

all: $(PROJECTS)

residualfm: residualfm/functions.o
    $(MEX) $(MEXFLAGS) $(LIBS) -o $(MEXDIR)/$@.$(MEXSUFFIX) $^

.cpp.o:
    $(CXX) -c -o $@ $< $(CFLAGS) $(INCLUDE)

clean:
    rm -f common/*.o
    for proj in $(PROJECTS); do \
        rm -f $$proj/*.o; \
        rm -f $(MEXDIR)/$$proj.$(MEXSUFFIX); \
    done

这里是我的文件结构：

$ ls *
Makefile  mex.kdev4  sfr_mex.sln  sfr_mex.suo  sfr_mex.v11.suo

residualfm:
DllMain.cpp             residualfm_variant.def           stdafx.h
functions.cpp           residualfm_variant.vcxproj       timing.cpp
functions.o             residualfm_variant.vcxproj.user
maxflow_classic_boykov  stdafx.cpp

这是错误：

$ make
g++ -shared -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2013b/bin/glnxa64 -L/usr/local/MATLAB/R2013b/bin/glnxa64 -lmx -lmex -lmat -lm -lm -o ../residualfm.mexa64 residualfm/functions.o
residualfm/functions.o: In function `mexFunction':
functions.cpp:(.text+0x27b): undefined reference to `mexErrMsgTxt'
functions.cpp:(.text+0x2a0): undefined reference to `mexErrMsgTxt'
functions.cpp:(.text+0x2c7): undefined reference to `mxGetClassID'
functions.cpp:(.text+0x2e5): undefined reference to `mexErrMsgTxt'
functions.cpp:(.text+0x301): undefined reference to `mxGetNumberOfDimensions'
functions.cpp:(.text+0x320): undefined reference to `mexErrMsgTxt'
functions.cpp:(.text+0x341): undefined reference to `mxGetData'
functions.cpp:(.text+0x350): undefined reference to `mxGetDimensions'
functions.cpp:(.text+0x371): undefined reference to `mxGetNumberOfElements'
functions.cpp:(.text+0x390): undefined reference to `mexErrMsgTxt'
functions.cpp:(.text+0x3aa): undefined reference to `mxGetScalar'
functions.cpp:(.text+0x3c5): undefined reference to `mxGetNumberOfElements'
functions.cpp:(.text+0x3e4): undefined reference to `mexErrMsgTxt'
functions.cpp:(.text+0x3fe): undefined reference to `mxGetScalar'
functions.cpp:(.text+0x4f5): undefined reference to `mexErrMsgTxt'
functions.cpp:(.text+0xdd3): undefined reference to `mxCreateNumericArray'
functions.cpp:(.text+0xdde): undefined reference to `mxGetData'
functions.cpp:(.text+0xefe): undefined reference to `mxGetScalar'
functions.cpp:(.text+0xf9d): undefined reference to `mxCreateNumericArray'
functions.cpp:(.text+0xfa8): undefined reference to `mxGetData'
functions.cpp:(.text+0x11dc): undefined reference to `mxCreateSparse'
functions.cpp:(.text+0x11e7): undefined reference to `mxGetJc'
functions.cpp:(.text+0x11f2): undefined reference to `mxGetIr'
functions.cpp:(.text+0x11fd): undefined reference to `mxGetPr'
residualfm/functions.o: In function `visit_backwards(Node*, Node*, double*, int)':
functions.cpp:(.text+0x232): undefined reference to `mexErrMsgTxt'
collect2: error: ld returned 1 exit status
make: *** [residualfm] Error 1

使用mex functions.cpp从matlab编译可以正常工作

编辑：谢谢你的提示！解决了（但不明白）：

更改residualfm: residualfm/functions.o中的顺序：

$(MEX) $(MEXFLAGS) $(LIBS) -o $(MEXDIR)/$@.$(MEXSUFFIX) $^

到

$(MEX) -o $(MEXDIR)/$@.$(MEXSUFFIX) $^ $() $(MEXFLAGS) $(LIBS)

解决了这个问题。有人可以解释一下吗？

Answer 1

（已在评论和修改中解决。请参阅Question with no answers, but issue solved in the comments (or extended in chat)）

@Amro写道：

链接库必须在命令行
中编译文件之后

OP写道：

更改residualfm: residualfm/functions.o中的顺序：

$(MEX) $(MEXFLAGS) $(LIBS) -o $(MEXDIR)/$@.$(MEXSUFFIX) $^   到

$(MEX) -o $(MEXDIR)/$@.$(MEXSUFFIX) $^ $() $(MEXFLAGS) $(LIBS)

解决了这个问题。

Matlab mex代码不使用Makefile编译 - 未定义参考

1 个答案: