Matlab 2013b生成的代码在mex中生成体系结构x86_64错误的未定义符号

Question

我有一个Simulink编码器生成的C代码，需要在C S函数中使用。

这听起来可能有点奇怪，但我需要在编写s函数的输出之前在s函数内多次执行此代码（这是一种进化算法，需要在评估和排名之前为很多人模拟预测...但这些细节并不重要）。

问题是尝试混合代码时，我似乎对64位指令集有问题。

我以生成的erg_main.c为例，说明如何与生成的代码进行交互：

/*
 * File: ert_main.c
 *
 * Code generated for Simulink model 'Peltier_model'.
 *
 * Model version                  : 1.14
 * Simulink Coder version         : 8.5 (R2013b) 08-Aug-2013
 * C/C++ source code generated on : Thu Apr  3 18:01:46 2014
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: 32-bit Generic
 * Emulation hardware selection:
 *    Differs from embedded hardware (MATLAB Host)
 * Code generation objective: Debugging
 * Validation result: Passed (0), Warning (1), Error (0)
 */

#include <stdio.h>                     /* This ert_main.c example uses printf/fflush */
#include "Peltier_model.h"             /* Model's header file */
#include "rtwtypes.h"

/*
 * Associating rt_OneStep with a real-time clock or interrupt service routine
 * is what makes the generated code "real-time".  The function rt_OneStep is
 * always associated with the base rate of the model.  Subrates are managed
 * by the base rate from inside the generated code.  Enabling/disabling
 * interrupts and floating point context switches are target specific.  This
 * example code indicates where these should take place relative to executing
 * the generated code step function.  Overrun behavior should be tailored to
 * your application needs.  This example simply sets an error status in the
 * real-time model and returns from rt_OneStep.
 */
void rt_OneStep(void)
{
  static boolean_T OverrunFlag = 0;

  /* Disable interrupts here */

  /* Check for overrun */
  if (OverrunFlag) {
    rtmSetErrorStatus(Peltier_model_M, "Overrun");
    return;
  }

  OverrunFlag = TRUE;

  /* Save FPU context here (if necessary) */
  /* Re-enable timer or interrupt here */
  /* Set model inputs here */

  /* Step the model */
  Peltier_model_step();

  /* Get model outputs here */

  /* Indicate task complete */
  OverrunFlag = FALSE;

  /* Disable interrupts here */
  /* Restore FPU context here (if necessary) */
  /* Enable interrupts here */
}

/*
 * The example "main" function illustrates what is required by your
 * application code to initialize, execute, and terminate the generated code.
 * Attaching rt_OneStep to a real-time clock is target specific.  This example
 * illustates how you do this relative to initializing the model.
 */
int_T main(int_T argc, const char *argv[])
{
  /* Unused arguments */
  (void)(argc);
  (void)(argv);

  /* Initialize model */
  Peltier_model_initialize();

  /* Attach rt_OneStep to a timer or interrupt service routine with
   * period 0.01 seconds (the model's base sample time) here.  The
   * call syntax for rt_OneStep is
   *
   *  rt_OneStep();
   */
  printf("Warning: The simulation will run forever. "
         "Generated ERT main won't simulate model step behavior. "
         "To change this behavior select the 'MAT-file logging' option.\n");
  fflush((NULL));
  while (rtmGetErrorStatus(Peltier_model_M) == (NULL)) {
    /*  Perform other application tasks here */
  }

  /* Disable rt_OneStep() here */

  /* Terminate model */
  Peltier_model_terminate();
  return 0;
}

/*
 * File trailer for generated code.
 *
 * [EOF]
 */

现在，我只是尝试使用Peltier_model_initialize();初始化模型Peltier_model_initialize(); 并包括来自the erg_main.c标头

尝试将其与以下结果混合：

**************************************************************************
  Warning: Neither -compatibleArrayDims nor -largeArrayDims is selected. 
           Using -compatibleArrayDims. In the future, MATLAB will require
           the use of -largeArrayDims and remove the -compatibleArrayDims
           option. For more information, see:
           http://www.mathworks.com/help/matlab/matlab_external/upgrading-mex-files-to-use-64-bit-api.html
**************************************************************************

-> mexopts.sh sourced from directory (DIR = $PREF_DIR)
   FILE = /Users/JoachimSA/.matlab/R2013b/mexopts.sh
----------------------------------------------------------------
->    MATLAB                = /Applications/MATLAB_R2013b.app
->    CC                    = xcrun  -sdk macosx10.9  clang
->    CC flags:
         CFLAGS             = -fno-common -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9  -fexceptions
         CDEBUGFLAGS        = -g
         COPTIMFLAGS        = -O2 -DNDEBUG
         CLIBS              = -L/Applications/MATLAB_R2013b.app/bin/maci64 -lmx -lmex -lmat -lstdc++
         arguments          =  -DMX_COMPAT_32
->    CXX                   = xcrun  -sdk macosx10.9  clang++
->    CXX flags:
         CXXFLAGS           = -fno-common -fexceptions -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9
         CXXDEBUGFLAGS      = -g
         CXXOPTIMFLAGS      = -O2 -DNDEBUG
         CXXLIBS            = -L/Applications/MATLAB_R2013b.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_R2013b.app/bin/maci64 -lmx -lmex -lmat -L -lgfortran -L -lgfortranbegin
         arguments          =  -DMX_COMPAT_32
->    LD                    = xcrun -sdk macosx10.9 clang
->    Link flags:
         LDFLAGS            = -arch x86_64 -Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9 -bundle -Wl,-exported_symbols_list,/Applications/MATLAB_R2013b.app/extern/lib/maci64/mexFunction.map
         LDDEBUGFLAGS       = -g
         LDOPTIMFLAGS       = -O
         LDEXTENSION        = .mexmaci64
         arguments          = 
->    LDCXX                 = 
->    Link flags:
         LDCXXFLAGS         = 
         LDCXXDEBUGFLAGS    = 
         LDCXXOPTIMFLAGS    = 
         LDCXXEXTENSION     = 
         arguments          = 
----------------------------------------------------------------

-> xcrun  -sdk macosx10.9  clang -c  -I/Applications/MATLAB_R2013b.app/rtw/c/src -I/Users/JoachimSA/Documents/WICHTIG/Diplomarbeit/Matlab_FIles/Peltier_Codegen/Peltier_model_ert_rtw -I/Applications/MATLAB_R2013b.app/extern/include -I/Applications/MATLAB_R2013b.app/simulink/include -DMATLAB_MEX_FILE -fno-common -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9  -fexceptions  -DMX_COMPAT_32 -O2 -DNDEBUG  "CC_IMEA.c"

-> xcrun  -sdk macosx10.9  clang -c  -I/Applications/MATLAB_R2013b.app/rtw/c/src -I/Users/JoachimSA/Documents/WICHTIG/Diplomarbeit/Matlab_FIles/Peltier_Codegen/Peltier_model_ert_rtw -I/Applications/MATLAB_R2013b.app/extern/include -I/Applications/MATLAB_R2013b.app/simulink/include -DMATLAB_MEX_FILE -fno-common -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9  -fexceptions  -DMX_COMPAT_32 -O2 -DNDEBUG  "CC_Opt_Objectives.c"

-> xcrun  -sdk macosx10.9  clang -c  -I/Applications/MATLAB_R2013b.app/rtw/c/src -I/Users/JoachimSA/Documents/WICHTIG/Diplomarbeit/Matlab_FIles/Peltier_Codegen/Peltier_model_ert_rtw -I/Applications/MATLAB_R2013b.app/extern/include -I/Applications/MATLAB_R2013b.app/simulink/include -DMATLAB_MEX_FILE -fno-common -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9  -fexceptions  -DMX_COMPAT_32 -O2 -DNDEBUG  "CC_System_Utils.c"

-> xcrun  -sdk macosx10.9  clang -c  -I/Applications/MATLAB_R2013b.app/rtw/c/src -I/Users/JoachimSA/Documents/WICHTIG/Diplomarbeit/Matlab_FIles/Peltier_Codegen/Peltier_model_ert_rtw -I/Applications/MATLAB_R2013b.app/extern/include -I/Applications/MATLAB_R2013b.app/simulink/include -DMATLAB_MEX_FILE -fno-common -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9  -fexceptions  -DMX_COMPAT_32 -O2 -DNDEBUG  "CC_Opt_SystemCabin.c"

-> xcrun  -sdk macosx10.9  clang -c  -I/Applications/MATLAB_R2013b.app/rtw/c/src -I/Users/JoachimSA/Documents/WICHTIG/Diplomarbeit/Matlab_FIles/Peltier_Codegen/Peltier_model_ert_rtw -I/Applications/MATLAB_R2013b.app/extern/include -I/Applications/MATLAB_R2013b.app/simulink/include -DMATLAB_MEX_FILE -fno-common -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9  -fexceptions  -DMX_COMPAT_32 -O2 -DNDEBUG  "CC_Optimiser.c"

-> xcrun -sdk macosx10.9 clang -O -arch x86_64 -Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9 -bundle -Wl,-exported_symbols_list,/Applications/MATLAB_R2013b.app/extern/lib/maci64/mexFunction.map -o  "CC_Optimiser.mexmaci64"  CC_IMEA.o CC_Opt_Objectives.o CC_System_Utils.o CC_Opt_SystemCabin.o CC_Optimiser.o  -L/Applications/MATLAB_R2013b.app/bin/maci64 -lmx -lmex -lmat -lstdc++

Undefined symbols for architecture x86_64:
  "_Peltier_model_initialize", referenced from:
      _CC_Opt_SystemCabin in CC_Opt_SystemCabin.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

    mex: link of ' "CC_Optimiser.mexmaci64"' failed.

Unable to complete successfully.

Error in build_mex_files (line 6)
mex -v ...

Error in run (line 63)
evalin('caller', [script ';']);

我的6位版本真的有问题吗，还是只是不正确处理代码？

非常感谢您的帮助 ！

Answer 1

OP发现需要在mex命令上指定所有源文件。

如果主源文件包含所有必需的声明，则可能导致编译成功，但链接失败。

这是 MathWorks网站上“构建MEX文件”的“链接多个文件”部分的一些其他信息 ：

您可以组合多个源文件，目标文件和文件库来构建二进制MEX文件。 为此，请列出其他文件及其文件扩展名，以空格分隔。 MEX文件的名称是列表中第一个文件的名称。

以下命令将多个不同类型的文件组合到一个名为circle.ext的二进制MEX文件中，其中ext是与当前平台相对应的扩展名：

mex circle.c square.obj rectangle.c shapes.lib

如上所述，将带有mexFunction的文件放在列表的第一位，以便MEX文件从该文件中获取名称。

mex帮助页面的“从多个源文件构建MEX文件”部分带有一个类似的示例，尽管使用了Fortran源：

mex -largeArrayDims fulltosparse.Floadsparse.F

MEX文件名是fulltosparse，因为fulltosparse.F是命令行上的第一个文件。