用C使用利尔吉斯特描述C code ++ [英] Lear Gist Descriptor C code used with C++

问题描述

我用的李尔的实现主旨描述符的一种能在这里找到一个项目：的http：//利尔。 inrialpes.fr/software 。

I am using Lear's implementation of the Gist descriptor for a project which can be found here: http://lear.inrialpes.fr/software.

我写在C ++应用程序，我想使用这个库。我有虽与makefile的问题和一般的链接。

I am writing an application in c++ and I want to use this library. I am having issues though with the makefile and linking in general.

这些命令给我任何错误：

These commands give me no errors:

g++ -c standalone_image.c -o standalone_image.o
g++ -c gist.c -o gist.o

不过，此行

g++ compute_gist.c `pkg-config --cflags --libs opencv`

给我下面的错误

Undefined symbols for architecture x86_64:
  "color_gist_scaletab(color_image_t*, int, int, int const*)", referenced from:
      _main in ccMFYbAU.o
  "color_image_delete(color_image_t*)", referenced from:
      _main in ccMFYbAU.o
  "color_image_new(int, int)", referenced from:
      load_ppm(char const*)in ccMFYbAU.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

我在不同的目录马赛克C ++ code。我也试图编译要点和单独standalone_image，复制到马赛克目录，并编译马赛克code。
这给了我以下错误：

I have the Mosaic c++ code in a different directory. I also tried to compile gist and standalone_image seperately, copy into the mosaic directory, and compile the Mosaic code. Which gives me the following error:

Undefined symbols for architecture x86_64:
  "color_gist_scaletab(color_image_t*, int, int, int const*)", referenced from:
      _main in main.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make: *** [mosaic] Error 1

我真的希望在我的项目使用这个库，但我不能想出一个办法来整合它在我的C ++。

I really want to use this library in my project, but I can't figure out a way to incorporate it in my c++.

任何帮助是极大AP preciated！谢谢！

Any help is GREATLY appreciated! Thanks!

编辑：我使用的是Mac狮子：

I am using Mac Lion with:

gcc + g++ version: i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)

李尔库还采用了FFTW3库，应与C和C ++的工作。

The lear library also uses the FFTW3 library that should work with C and C++.

推荐答案

问题是，我需要周围的要旨的extern包括，但那是在Makefile做链接是也是错误的。它的工作原理吧。 ：）

The problem was that I needed the extern around the gist include, but the linking that was done in the Makefile was also wrong. It works now. :)

这篇关于用C使用利尔吉斯特描述C code ++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！