matlab mex undeclared identifier,matlab与c混合编程碰到的一个小问题

本是古典何须时尚 2023-01-13 13:56 153阅读 0赞

一个朋友给了一段代码让我调试，大意是移植了一些linux下的c程序，需要在windows里面由matlab调用。

粗粗看了一眼相关的东西，主要是用matlab里面的mex函数来调用c函数就可以，编译环境可以实现配置，也可以交互配置。结果一编译，错误就来了

错误是：

>> mex E:\\Ctomexw32\\ml\_texture.c

Select a compiler:

\[1\] Lcc-win32 C 2.4.1 in D:\\PROGRA~1\\MATLAB\\R2007a\\sys\\lcc

\[2\] Microsoft Visual C++ 6.0 in D:\\Program Files\\Microsoft Visual Studio

\[0\] None

Compiler: 2

Trying to update options file: C:\\Documents and Settings\\myching\\Application Data\\MathWorks\\MATLAB\\R2007a\\mexopts.bat

From template:              D:\\PROGRA~1\\MATLAB\\R2007a\\bin\\win32\\mexopts\\msvc60opts.bat

Done . . .

ml\_texture.c

E:\\Ctomexw32\\ml\_texture.c(48) : warning C4028: formal parameter 4 different from declaration

E:\\Ctomexw32\\ml\_texture.c(51) : error C2065: 'u\_int8\_t' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(51) : error C2065: 'p\_img' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(51) : warning C4552: '\*' : operator has no effect; expected operator with side-effect

E:\\Ctomexw32\\ml\_texture.c(52) : error C2065: 'p\_gray' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(52) : error C2100: illegal indirection

E:\\Ctomexw32\\ml\_texture.c(52) : warning C4552: '\*' : operator has no effect; expected operator with side-effect

E:\\Ctomexw32\\ml\_texture.c(53) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(54) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(55) : error C2275: 'TEXTURE\_FEATURE\_MAP' : illegal use of this type as an expression

E:\\Ctomexw32\\CVIPtexture.h(63) : see declaration of 'TEXTURE\_FEATURE\_MAP'

E:\\Ctomexw32\\ml\_texture.c(55) : error C2065: 'features\_used' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(56) : error C2275: 'TEXTURE' : illegal use of this type as an expression

E:\\Ctomexw32\\CVIPtexture.h(43) : see declaration of 'TEXTURE'

E:\\Ctomexw32\\ml\_texture.c(56) : error C2065: 'features' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(57) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(58) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(59) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(60) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(61) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(62) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(63) : error C2143: syntax error : missing ';' before 'type'

E:\\Ctomexw32\\ml\_texture.c(64) : error C2065: 'outtest' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(64) : warning C4552: '\*' : operator has no effect; expected operator with side-effect

E:\\Ctomexw32\\ml\_texture.c(80) : error C2065: 'mrows' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(81) : error C2065: 'ncols' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(87) : error C2059: syntax error : ')'

E:\\Ctomexw32\\ml\_texture.c(91) : warning C4047: '=' : 'int ' differs in levels of indirection from 'void \*'

E:\\Ctomexw32\\ml\_texture.c(95) : error C2223: left of '->ASM' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(96) : error C2223: left of '->contrast' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(97) : error C2223: left of '->correlation' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(98) : error C2223: left of '->variance' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(99) : error C2223: left of '->IDM' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(100) : error C2223: left of '->sum\_avg' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(101) : error C2223: left of '->sum\_var' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(102) : error C2223: left of '->sum\_entropy' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(103) : error C2223: left of '->entropy' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(104) : error C2223: left of '->diff\_var' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(105) : error C2223: left of '->diff\_entropy' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(106) : error C2223: left of '->meas\_corr1' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(107) : error C2223: left of '->meas\_corr2' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(108) : error C2223: left of '->max\_corr\_coef' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(110) : error C2065: 'imgsize' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(110) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(110) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(111) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(111) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(113) : error C2059: syntax error : ')'

E:\\Ctomexw32\\ml\_texture.c(115) : error C2065: 'i' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(116) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(116) : warning C4047: '=' : 'int ' differs in levels of indirection from 'void \*'

E:\\Ctomexw32\\ml\_texture.c(116) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(117) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(122) : error C2065: 'imgindex' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(122) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(122) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(122) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(122) : error C2105: '++' needs l-value

E:\\Ctomexw32\\ml\_texture.c(123) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(123) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(123) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(123) : error C2105: '++' needs l-value

E:\\Ctomexw32\\ml\_texture.c(124) : error C2065: 'offset' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(124) : warning C4047: 'function' : 'const int \*' differs in levels of indirection from 'int '

E:\\Ctomexw32\\ml\_texture.c(124) : warning C4024: 'mxCalcSingleSubscript\_700' : different types for formal and actual parameter 3

E:\\Ctomexw32\\ml\_texture.c(125) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(125) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(128) : warning C4047: '=' : 'int ' differs in levels of indirection from 'struct TEXTURE \*'

E:\\Ctomexw32\\ml\_texture.c(144) : error C2065: 'outputsize' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(144) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(144) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(145) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(145) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(147) : warning C4047: 'function' : 'const int \*' differs in levels of indirection from 'int '

E:\\Ctomexw32\\ml\_texture.c(147) : warning C4024: 'mxCreateNumericArray\_700' : different types for formal and actual parameter 2

E:\\Ctomexw32\\ml\_texture.c(150) : error C2065: 'output' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(150) : warning C4047: '=' : 'int ' differs in levels of indirection from 'float \*'

E:\\Ctomexw32\\ml\_texture.c(154) : error C2065: 'outputindex' : undeclared identifier

E:\\Ctomexw32\\ml\_texture.c(154) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(154) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(154) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(155) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(155) : error C2105: '++' needs l-value

E:\\Ctomexw32\\ml\_texture.c(156) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(156) : error C2106: '=' : left operand must be l-value

E:\\Ctomexw32\\ml\_texture.c(157) : warning C4047: 'function' : 'const int \*' differs in levels of indirection from 'int '

E:\\Ctomexw32\\ml\_texture.c(157) : warning C4024: 'mxCalcSingleSubscript\_700' : different types for formal and actual parameter 3

E:\\Ctomexw32\\ml\_texture.c(158) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(158) : error C2223: left of '->ASM' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(158) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(160) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(160) : error C2105: '++' needs l-value

E:\\Ctomexw32\\ml\_texture.c(161) : warning C4047: 'function' : 'const int \*' differs in levels of indirection from 'int '

E:\\Ctomexw32\\ml\_texture.c(161) : warning C4024: 'mxCalcSingleSubscript\_700' : different types for formal and actual parameter 3

E:\\Ctomexw32\\ml\_texture.c(162) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(162) : error C2223: left of '->contrast' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(162) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(164) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(164) : error C2105: '++' needs l-value

E:\\Ctomexw32\\ml\_texture.c(165) : warning C4047: 'function' : 'const int \*' differs in levels of indirection from 'int '

E:\\Ctomexw32\\ml\_texture.c(165) : warning C4024: 'mxCalcSingleSubscript\_700' : different types for formal and actual parameter 3

E:\\Ctomexw32\\ml\_texture.c(166) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(166) : error C2223: left of '->correlation' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(166) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(168) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(168) : error C2105: '++' needs l-value

E:\\Ctomexw32\\ml\_texture.c(169) : warning C4047: 'function' : 'const int \*' differs in levels of indirection from 'int '

E:\\Ctomexw32\\ml\_texture.c(169) : warning C4024: 'mxCalcSingleSubscript\_700' : different types for formal and actual parameter 3

E:\\Ctomexw32\\ml\_texture.c(170) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(170) : error C2223: left of '->variance' must point to struct/union

E:\\Ctomexw32\\ml\_texture.c(170) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(172) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(172) : error C2105: '++' needs l-value

E:\\Ctomexw32\\ml\_texture.c(173) : warning C4047: 'function' : 'const int \*' differs in levels of indirection from 'int '

E:\\Ctomexw32\\ml\_texture.c(173) : warning C4024: 'mxCalcSingleSubscript\_700' : different types for formal and actual parameter 3

E:\\Ctomexw32\\ml\_texture.c(174) : error C2109: subscript requires array or pointer type

E:\\Ctomexw32\\ml\_texture.c(174) : fatal error C1003: error count exceeds 100; stopping compilation

D:\\PROGRA~1\\MATLAB\\R2007A\\BIN\\MEX.PL: Error: Compile of 'E:\\Ctomexw32\\ml\_texture.c' failed.

??? Error using ==> mex at 206

Unable to complete successfully.

分析：看起来，应该首先解决'u\_int8\_t‘这个类型定义。找了找，windows里面没有，vc里面也没有。网上搜了一下，定义的方式应该是

“typedef unsigned char            u\_int8\_t, u\_int8m\_t;”

源代码的前面有句话，\#include ，所以我就把这个定义放在了types.h里面了。

编译，通过！

但是报告：

>> mex E:\\Ctomexw32\\ml\_texture.c

Microsoft (R) Incremental Linker Version 6.00.8168

C:\\DOCUME~1\\myching\\LOCALS~1\\Temp\\mex\_7CC36970-E7CE-4C7B-E1A1-C20DE78ACBCF\\ml\_texture.obj

Creating library C:\\DOCUME~1\\myching\\LOCALS~1\\Temp\\mex\_7CC36970-E7CE-4C7B-E1A1-C20DE78ACBCF\\templib.x and object C:\\DOCUME~1\\myching\\LOCALS~1\\Temp\\mex\_7CC36970-E7CE-4C7B-E1A1-C20DE78ACBCF\\templib.exp

ml\_texture.obj : error LNK2001: unresolved external symbol \_Extract\_Texture\_Features

ml\_texture.mexw32 : fatal error LNK1120: 1 unresolved externals

D:\\PROGRA~1\\MATLAB\\R2007A\\BIN\\MEX.PL: Error: Link of 'ml\_texture.mexw32' failed.

??? Error using ==> mex at 206

Unable to complete successfully.

意思是外部函数连接有问题，看了看那个外部函数Extract\_Texture\_Features在cvip\_pgmtexture.c里面放着呢，于是，想到应该联合编译，

>> mex E:\\Ctomexw32\\cvip\_pgmtexture.c E:\\Ctomexw32\\ml\_texture.c

??? ml\_texture requires a single input argument.

??? Error using ==> edit>handleError at 462

Can't edit the MEX-file 'D:\\My Documents\\MATLAB\\cvip\_pgmtexture.mexw32'.

这就没有什么问题啦。

matlab mex undeclared identifier,matlab与c混合编程碰到的一个小问题

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