使用FANN的链接错误 [英] Link errors using FANN
问题描述
我正在尝试使用MinGW在Windows上构建一个基本的FANN(快速人工神经网络)项目.但是，每当我尝试链接可执行文件时，都会遇到一堆undefined reference to错误.有趣的是，如果我根本不链接该库，则会收到更多错误，这意味着至少某些库正在运行.我尝试编译和链接的文件的代码是:
I'm trying to build a basic FANN (Fast Artificial Neural Network) project on Windows with MinGW. However, whenever I try to link the executable, I run into a bunch of undefined reference to errors. Interestingly, if I don't link the library at all, I get more errors, implying that at least some of the library is working. The code for the file I'm trying to compile and link is:
#include "doublefann.h"
int main() {
const unsigned int num_input_neurons = 9;
const unsigned int num_output_neurons = 1;
const unsigned int num_layers = 3;
const unsigned int num_hidden_neurons = 9;
const float desired_error = (const float) 0;
const unsigned int max_epochs = 500000;
const unsigned int epochs_between_reports = 1000;
struct fann *ann = fann_create_standard(num_layers,
num_input_neurons,
num_hidden_neurons,
num_output_neurons);
fann_set_activation_function_hidden(ann, FANN_SIGMOID_SYMMETRIC);
fann_set_activation_function_output(ann, FANN_SIGMOID_SYMMETRIC);
fann_train_on_file(ann,
"titanic-training.data",
max_epochs,
epochs_between_reports,
desired_error);
fann_save(ann, "titanic.net");
fann_destroy(ann);
return 0;
}
我用来编译和链接的命令是:
and the command I'm using to compile and link is:
gcc -Wall -Ifann\src\include titanic-train.c -Lfann\bin -lfanndouble -o titanic-train.exe
我回来的错误是:
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0x7f): undefined reference to `fann_set_activation_function_hidden'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0x93): undefined reference to `fann_set_activation_function_output'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0xbf): undefined reference to `fann_train_on_file'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0xd3): undefined reference to `fann_save'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0xdf): undefined reference to `fann_destroy'
c:/fragileprograms/mingw-native/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o: bad reloc address 0x64 in section `.rdata'
c:/fragileprograms/mingw-native/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: final link failed: Invalid operation
collect2.exe: error: ld returned 1 exit status
如果我根本不链接库，我会得到:
If I don't link the library at all, I instead get:
C:\Users\kunkelwe\AppData\Local\Temp\ccyOO3jL.o:titanic-train.c:(.text+0x67): undefined reference to `fann_create_standard'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0x7f): undefined reference to `fann_set_activation_function_hidden'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0x93): undefined reference to `fann_set_activation_function_output'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0xbf): undefined reference to `fann_train_on_file'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0xd3): undefined reference to `fann_save'
C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o:titanic-train.c:(.text+0xdf): undefined reference to `fann_destroy'
c:/fragileprograms/mingw-native/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: C:\Users\kunkelwe\AppData\Local\Temp\ccsWQg66.o: bad reloc address 0x64 in section `.rdata'
c:/fragileprograms/mingw-native/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: final link failed: Invalid operation
collect2.exe: error: ld returned 1 exit status
按照Haroogan的要求，我跑了nm fanndouble.lib.输出是相当广泛的，因此，与其将其全部粘贴到这里，还不如通过pastebin在此处提供它: http://pastebin.com/raw.php?i=vybFhEcX
As per Haroogan's request, I ran nm fanndouble.lib. The output is rather extensive, so rather than paste it all here, I've made it available via pastebin here: http://pastebin.com/raw.php?i=vybFhEcX
我对nm不熟悉，但是似乎文件中确实存在缺失的符号.
I'm not familiar with nm, but it appears that the missing symbols do exist in the file.
编辑#2:
doublefann.h的内容为: http://pastebin.com/mrHKJi8C
The contents of doublefann.h are: http://pastebin.com/mrHKJi8C
以及fann.h的内容，其中包括: http://pastebin.com/gTrHCYAg
and the contents of fann.h, which it includes are: http://pastebin.com/gTrHCYAg
是否可以通过使用MinGW重新编译库来解决问题?
Could the problem just be solved by recompiling the library with MinGW?
编辑#3:
进行Haroogan建议的更改！除了这些更改之外，我还必须通过添加以下内容来修改FANN的CMakeLists.txt文件:
Making the changes that Haroogan suggested worked! In addition to those changes, I had to modify the CMakeLists.txt file for FANN by adding:
if (WIN32)
ADD_DEFINITIONS(-DFANN_DLL_EXPORTS)
endif (WIN32)
然后，在项目的根目录中依次运行cmake -G "MinGW Makefiles"和mingw32-make生成一个文件libdoublefann.dll，当链接并包含在.exe目录中时，该文件允许我 finally ，以运行我的程序.
Then, running cmake -G "MinGW Makefiles" and then mingw32-make in the root of the project produced a file, libdoublefann.dll, that when linked against and included in the directory of the .exe, allowed me, finally, to run my program.
推荐答案
在doublefann.h行#116中:
#if (_MSC_VER > 1300)
更改为:
#if (_MSC_VER > 1300) || defined(__MINGW32__) || defined(__MINGW64__)
此外，在第121行:
#if defined(_MSC_VER) && (defined(FANN_USE_DLL) || defined(FANN_DLL_EXPORTS))
更改为:
#if (defined(_MSC_VER) || defined(__MINGW32__) || defined(__MINGW64__)) && \
(defined(FANN_USE_DLL) || defined(FANN_DLL_EXPORTS))
这篇关于使用FANN的链接错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
