使用mingw-w64编译mex时出现链接器错误 [英] Linker error compiling mex with mingw-w64
问题描述
我正在尝试将Mingw-w64设置为MATLAB 2013a中的mex编译器.我的笔记本电脑具有x86_64体系结构并运行Windows7.我要编译的程序使用c ++ 11样式的线程,因此我将mingw-w64版本4.9.0与posix线程一起使用.
I'm trying to setup Mingw-w64 as the mex compiler in MATLAB 2013a. My laptop has x86_64 architecture and runs windows 7. The program I want to compile uses c++11-style threading, so I'm using mingw-w64 version 4.9.0 with posix threads.
根据说明,我在此处和此处,我修改了mexopts.bat文件.该代码似乎可以成功编译,但是链接器报告错误.有人建议我可能做错了什么吗?
According to instruction I found here and here, I modified my mexopts.bat file. The code seems to compile successfully, but the linker reports an error. Does anyone have suggestions what I might be doing wrong?
顺便说一句,我尝试使用gnumex设置编译器,但是那也不起作用.
By the way, I tried using gnumex to setup the compiler, but that didn't work either.
这是MATLAB提供的输出和错误消息:
Here's the output and error message that MATLAB gives:
>mex -v Gomoku_mex.cpp
-> Default options filename found in C:\Users\Bas\AppData\Roaming\MathWorks\MATLAB\R2013a
-> Options file = C:\Users\Bas\AppData\Roaming\MathWorks\MATLAB\R2013a\mexopts.bat
MATLAB = C:\Program Files\MATLAB\R2013a
-> COMPILER = x86_64-w64-mingw32-g++
-> Compiler flags:
COMPFLAGS = -std=c++11 -fexceptions -I"C:\Program Files\MATLAB\R2013a\extern\include"
OPTIMFLAGS = -O3 -fexpensive-optimizations -DNDEBUG
DEBUGFLAGS = -g -Wall -Wextra
arguments =
Name switch = -o
-> Pre-linking commands=
-> LINKER = x86_64-w64-mingw32-g++
-> Link directives:
LINKFLAGS = -shared mex.def -L"C:\Program Files\MATLAB\R2013a\bin\win64" -static-libstdc++
LINKDEBUGFLAGS = -g -Wall
LINKFLAGSPOST = -lmex -lmx -lmat -lmwlapack -lmwblas
Name directive = -o "Gomoku_mex.mexw64"
File link directive =
Lib. link directive =
Rsp file indicator =
-> Resource Compiler =
-> Resource Linker =
----------------------------------------------------------------
--> x86_64-w64-mingw32-g++ -std=c++11 -fexceptions -I"C:\Program Files\MATLAB\R2013a\extern\include" -oC:\Users\Bas\AppData\Local\Temp\mex_r7jRw0\Gomoku_mex.obj -I"C:\Program Files\MATLAB\R2013a\extern\include" -I"C:\Program Files\MATLAB\R2013a\simulink\include" -O3 -fexpensive-optimizations -DNDEBUG -DMX_COMPAT_32 Gomoku_mex.cpp
C:\Users\Bas\AppData\Local\Temp\cc4hwD3A.o:Gomoku_mex.cpp:(.text+0x9d1c): undefined reference to `mxGetPr'
C:\Users\Bas\AppData\Local\Temp\cc4hwD3A.o:Gomoku_mex.cpp:(.text+0x9d83): undefined reference to `mxCreateDoubleScalar'
C:/PROGRA~1/mingw-w64/x86_64-4.9.0-posix-seh-rt_v3-rev2/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Bas\AppData\Local\Temp\cc4hwD3A.o: bad reloc address 0x0 in section `.pdata$_ZNKSt5ctypeIcE8do_widenEc'
collect2.exe: error: ld returned 1 exit status
C:\PROGRA~1\MATLAB\R2013A\BIN\MEX.PL: Error: Compile of 'Gomoku_mex.cpp' failed.
Error using mex (line 206)
Unable to complete successfully.
作为附加信息,这是我的mexopts.bat文件.我是从上面两个链接之一直接得到的,并修改了目录&编译器名称并添加-std = c ++ 11
As extra information, this is my mexopts.bat file. I got this directly from one of the two links above and modified directory & compiler names and added -std=c++11
set MATLAB=%MATLAB%
set PATH=%PATH%;C:\PROGRA~1\mingw-w64\x86_64-4.9.0-posix-seh-rt_v3-rev2\mingw64\bin
set MW_TARGET_ARCH=win64
rem ********************************************************************
rem Compiler parameters
rem ********************************************************************
set COMPILER=x86_64-w64-mingw32-g++
set COMPFLAGS=-std=c++11 -fexceptions -I"%MATLAB%\extern\include"
set OPTIMFLAGS=-O3 -fexpensive-optimizations -DNDEBUG
set DEBUGFLAGS=-g -Wall -Wextra
set NAME_OBJECT=-o
rem ********************************************************************
rem Linker parameters
rem ********************************************************************
set PRELINK_CMDS1=echo EXPORTS > mex.def & echo mexFunction >> mex.def
set LINKER=x86_64-w64-mingw32-g++
set LINKFLAGS= -static-libstdc++ -shared mex.def -L"%MATLAB%\bin\win64" -L"%MATLAB%\extern\lib\win64\microsoft"
set LINKFLAGSPOST= -lmex -lmx -lmat -lmwlapack -lmwblas
set LINKOPTIMFLAGS=-O3
set LINKDEBUGFLAGS= -g -Wall
set LINK_FILE=
set LINK_LIB=
set NAME_OUTPUT=-o "%OUTDIR%%MEX_NAME%%MEX_EXT%"
set RSP_FILE_INDICATOR=
set POSTLINK_CMDS1=del mex.def
推荐答案
获取我正在使用的以下配置文件(您需要相应地调整指向MinGW-w64位置的路径):
Take the following configuration file that I'm using (you'll need to adjust the path pointing to MinGW-w64 location accordingly):
@echo off
set MATLAB=%MATLAB%
set MW_TARGET_ARCH=win64
set PATH=C:\MinGW-w64\mingw64\bin;%PATH%
set COMPILER=x86_64-w64-mingw32-g++
set COMPFLAGS=-c -m64 -mwin32 -mdll -Wall -std=c++11 -DMATLAB_MEX_FILE
set OPTIMFLAGS=-DNDEBUG -O2
set DEBUGFLAGS=-g
set NAME_OBJECT=-o
set LINKER=x86_64-w64-mingw32-g++
set LINKFLAGS=-shared -L"%MATLAB%\extern\lib\win64\microsoft" -L"%MATLAB%\bin\win64"
set LINKFLAGSPOST=-lmx -lmex -lmat
set LINKOPTIMFLAGS=-O2
set LINKDEBUGFLAGS=-g
set LINK_FILE=
set LINK_LIB=
set NAME_OUTPUT=-o "%OUTDIR%%MEX_NAME%%MEX_EXT%"
接下来是使用C ++ 11线程的简单MEX函数:
Next here is a simple MEX-function that uses C++11 threads:
#include "mex.h"
#include <vector>
#include <thread>
void say_hello(int tid) {
mexPrintf("hello from %d\n", tid);
}
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
std::vector<std::thread> threads;
for (int i=0; i<10; i++) {
threads.push_back(std::thread(say_hello, i));
}
for(auto& t : threads) {
t.join();
}
}
最后,我们在MATLAB中编译并运行它:
Finally we compile and run it in MATLAB:
>> mex -f mingw_mexopts.bat -largeArrayDims test.cpp
>> setenv('PATH', ['C:\MinGW-w64\mingw64\bin;', getenv('PATH')])
>> test
hello from 0
hello from 4
hello from 2
hello from 3
hello from 5
hello from 1
hello from 6
hello from 8
hello from 7
hello from 9
请注意,如果要将其部署到另一台计算机,则还必须复制一些相关的DLL(您可以在MinGW bin
文件夹中找到它们),并将其放置在MEX-旁边.文件.使用 Dependency Walker 列出它们.在我的情况下是:
Note that if you're going to deploy this to another machine, you'll have to also copy a few dependent DLL's (you'll find them in MinGW bin
folder), and place them next to the MEX-file. Use Dependency Walker to list them. In my case it was:
-
libstdc++-6.dll
-
libgcc_s_seh-1.dll
-
libwinpthread-1.dll
libstdc++-6.dll
libgcc_s_seh-1.dll
libwinpthread-1.dll
我将GCC 4.8.2与在64位Windows上运行的MATLAB R2014a一起使用.
I am using GCC 4.8.2 with MATLAB R2014a running on 64-bit Windows.
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