c++ - 在 Xcode 项目中使用动态库 (DevIL/OpenIL)

Question

我正在尝试编译使用 OpenGL、SDL 和 IL aka DevIL aka OpenIL 库的示例源代码。 OpenGL 和 SDL 可用作 native 框架，但 DevIL 不是。所以这就是我所做的:

我通过自制软件安装了 DevIL。首先我更改了公式，因为我需要 ILUT:

brew edit devil

然后编辑这些行

def install
  system "./configure", "--disable-debug", "--disable-dependency-tracking",
                        "--prefix=#{prefix}", "--enable-ILU"
  system "make install"
end

像这样

def install
  system "./configure", "--disable-debug", "--disable-dependency-tracking",
                        "--prefix=#{prefix}", "--enable-ILU", "--enable-ILUT"
  system "make install"
end

并用

安装了所有东西

[sudo] brew install devil

它为我提供了 /usr/local/include/ 中的 DevIL header 和 /usr/local/lib/ 中的动态库。接下来，我通过以下步骤将这些库添加到我的项目中:

• 右键单击我唯一的目标
• 点击“添加 > 现有框架”
• 选择“动态库”
• 添加libIL.dylib、libILU.dylib 和libILUT.dylib

(列表中还有libIL.1.dylib、libILU.1.dylib 和libILUT.1.dylib，这正常吗？)

然后我在“项目 > 编辑项目设置 > 构建 > 其他链接器标志”中添加了以下标志:

-lil -lilu -lilut

当我尝试编译和链接项目时，出现以下错误:

Ld "build/Debug/XCode OpenGL OOP Framework.app/Contents/MacOS/XCode OpenGL OOP Framework" normal i386
cd "/Users/padde/Documents/Studium/sem5/computergrafik/opengl intro/xcode projects/XCode OpenGL OOP Framework"
/Developer/usr/bin/g++-4.2 -arch i386 "-L/Users/padde/Documents/Studium/sem5/computergrafik/opengl intro/xcode projects/XCode OpenGL OOP Framework/build/Debug" "-F/Users/padde/Documents/Studium/sem5/computergrafik/opengl intro/xcode projects/XCode OpenGL OOP Framework/build/Debug" -filelist "/Users/padde/Documents/Studium/sem5/computergrafik/opengl intro/xcode projects/XCode OpenGL OOP Framework/build/XCode OpenGL OOP Framework.build/Debug/XCode OpenGL OOP Framework.build/Objects-normal/i386/XCode OpenGL OOP Framework.LinkFileList" -framework Foundation -framework AppKit -framework GLUT -framework OpenGL -framework SDL -lIL -lILU -lILUT -o "/Users/padde/Documents/Studium/sem5/computergrafik/opengl intro/xcode projects/XCode OpenGL OOP Framework/build/Debug/XCode OpenGL OOP Framework.app/Contents/MacOS/XCode OpenGL OOP Framework"

ld: warning: in /usr/local/lib/libIL.dylib, file was built for unsupported file format which is not the architecture being linked (i386)
ld: warning: in /usr/local/lib/libILU.dylib, file was built for unsupported file format which is not the architecture being linked (i386)
ld: warning: in /usr/local/lib/libILUT.dylib, file was built for unsupported file format which is not the architecture being linked (i386)
Undefined symbols:
  "_ilInit", referenced from:
      RenderEngine::initManagers()       in RenderEngine.o
  "_ilGetData", referenced from:
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
  "_ilBindImage", referenced from:
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
  "_ilLoadImage", referenced from:
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
  "_ilGenImages", referenced from:
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
  "_ilGetInteger", referenced from:
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
  "_ilDeleteImages", referenced from:
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
      TextureManager::loadTexture(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned int, unsigned int, unsigned int, bool, bool)in TextureManager.o
  "_main", referenced from:
      start in crt1.10.6.o
     (maybe you meant: _SDL_main)
ld: symbol(s) not found
collect2: ld returned 1 exit status

显然，.dylib 文件未正确构建，因此未找到符号，但我怎样才能使它工作？我犯了什么错误吗？有没有办法以不同的方式构建库以便它们与我的项目一起工作，或者我可以以某种方式更改我的项目的构建架构？

非常感谢您的帮助!

Answer 1

我通过将 brew 公式编辑为以下内容解决了这个问题:

def install
  system "./configure", "--disable-debug", "--disable-dependency-tracking",
                        "--prefix=#{prefix}", "--enable-ILU", "--enable-ILUT",
                        "CFLAGS=-arch i386", "CXXFLAGS=-arch i386"
  system "make install"
end