Xcode 4中没有gcc 4.2编译器选项？

Question

在我的Xcode 4安装中,我只有2个编译器选项:

1. Apple LLVM编译器3.0
2. GCC LLVM 4.2

在许多Xcode示例中,我看到GCC 4.2显示为第三个选项,但这根本不存在.我故意干净安装XCode 4.是否有标准的方法来添加GCC 4.2,如果它还没有？我的一个项目要求我使用GCC(而不是GCC LLVM),其他项目我对GCC LLVM感到满意,所以这只是一个问题.

Answer 1

这是一种在xcode 4.2中使用gcc 4.2进行编译的方法.这主要是通过命令行完成的,所以当你看到以:开头的行时,你需要打开Terminal.app并运行在之后启动的命令.[ 15:30 jon@MacBookPro / ]$$

在此过程中不会删除或删除任何文件或目录,因此如果您以后需要使用LLVM进行编译,则很容易撤消.

1. 下载-但没有安装尚未 - xcode_4.1_for_lion.dmg或xcode_4.1_for_snow_leopard.dmg

2. 现在,按照以下步骤将Xcode 4.1安装到/Developer-4.1:

   1. 备份工作/Developer目录(安装Xcode 4.2的地方)

   [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer /Developer-4.2
   

   2. 使用默认安装位置运行Xcode 4.1安装程序(/Developer)

   3. 将新的Xcode 4.1安装移至/Developer-4.1:

      [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer /Developer-4.1
      

   4. 将Xcode 4.2开发人员目录移回/Developer:

      [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer-4.2 /Developer
      

3. 编辑Xcode 4.2 GCC 4.2.xcspec文件以获得gcc 4.2以显示在编译器选项^[1]列表中:

   [ 15:30 jon@MacBookPro / ]$ sudo vi "/Developer/Library/Xcode/PrivatePlugIns/Xcode3Core.ideplugin/Contents/SharedSupport/Developer/Library/Xcode/Plug-ins/GCC 4.2 (Plausible Blocks).xcplugin/Contents/Resources/GCC 4.2.xcspec"
   

   • 从这里改变第41和42行:

     ShowInCompilerSelectionPopup = NO;
     IsNoLongerSupported = YES;
     

   • 对此:

     ShowInCompilerSelectionPopup = YES; 
     IsNoLongerSupported = NO;
     

4. 备份Xcode 4.2 iOS/Simulator Framework usr目录:

   [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer/Platforms/iPhoneOS.platform/Developer/usr /Developer/Platforms/iPhoneOS.platform/Developer/usr.backup
   [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer/Platforms/iPhoneSimulator.platform/Developer/usr /Developer/Platforms/iPhoneSimulator.platform/Developer/usr.backup
   

5. 将Xcode 4.1 iOS/Simulator Framework usr目录复制到Xcode 4.2:

   [ 15:30 jon@MacBookPro / ]$ sudo cp -rv /Developer-4.1/Platforms/iPhoneOS.platform/Developer/usr /Developer/Platforms/iPhoneOS.platform/Developer/usr
   [ 15:30 jon@MacBookPro / ]$ sudo cp -rv /Developer-4.1/usr /Developer/Platforms/iPhoneSimulator.platform/Developer/usr
   

6. 复制gcc并info在Xcode 4.1的iOS SDK库目录的Xcode 4.2 ^[2] :

   [ 15:30 jon@MacBookPro / ]$ sudo cp -rv /Developer-4.1/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib/gcc /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/usr/lib/gcc
   [ 15:30 jon@MacBookPro / ]$ sudo cp -rv /Developer-4.1/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib/info /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/usr/lib/info
   

7. 使用gcc-4.2编译!

   

这是一篇博文,我写了一些关于这个过程的更多信息.如果您遇到任何问题或有任何问题,请随时在博客上发表评论.

^[1]如果从命令行开口(使用类似vi,emacs,nano,等等)确保要么用引号的路径"/long path/with spaces/in it/file.xcspec"或逸出的空间/some/long\ path/with\ spaces/in\ it/file.xcspec

^[2]这是必要的,因为iPhoneOS.platform SDK有自己独立的/usr/lib目录,但iPhoneSimulator.platform SDK没有