修改Xcode配置并支持iPhone上dylib工程 实例

修改Xcode配置并支持iPhone上dylib工程是本文要介绍的内容，逛坛子发现一篇好文章，与大家分享一下，先来看内容。此帖纯粹讨论怎样更改xcode配置来使其支持创建iphone上的dylib工程文件，不涉及任何其他破解话题！

测试机器：10.6 with Xcode3.2

最近在研究如何创建iphone上的dylib文件，google出来的都是toolchain的东西，使用makefile来编译的，像我这种习惯IDE的人来说非常之不爽，所以花了一天时间来破解了下Xcode来让它可以创建编译iphone上的dylib文件的工程。

简单说下分析思路吧

首先xcode支持创建iphone static libtary和Cocoa的dynamic linrary的工程，通过不同编译对比可以发现Xcode通过productType = "com.apple.product-type.library.dynamic";配置来确定工程类型的。

打开**.xcodeproj/project.pbxproj文件，搜索productType=定位，可以发现如下图所示的内容

[attachment=10545]

可以创建一个iphone的static工程把static改成dynamic编译看看，可以发现xcode提示不支持dynamic类型的工程，无法编译，那我们让他支持就好了。

我们需要修改以下文件

/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Specifications/iPhoneOSProductTypes.xcspec  
/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Specifications/iPhoneOSPackageTypes.xcspec  
在iPhoneOSProductTypes.xcspec中添加下列片段  
 
// Dynamic library  
    {   Type = ProductType;  
        Identifier = com.apple.product-type.library.dynamic;  
        Class = PBXStaticLibraryProductType;  
        Name = "Dynamic Library";  
        Description = "Dynamic library";  
        IconNamePrefix = "TargetLibrary";  
        DefaultTargetName = "Dynamic Library";  
        DefaultBuildProperties = {  
            FULL_PRODUCT_NAME = "$(EXECUTABLE_NAME)";  
            MACH_O_TYPE = "mh_dylib";  
            REZ_EXECUTABLE = YES;  
            EXECUTABLE_PREFIX = "";  
            EXECUTABLE_SUFFIX = ".$(EXECUTABLE_EXTENSION)";  
            EXECUTABLE_EXTENSION = "dylib";  
            PUBLIC_HEADERS_FOLDER_PATH = "/usr/local/include";  
            PRIVATE_HEADERS_FOLDER_PATH = "/usr/local/include";  
            INSTALL_PATH = "/usr/local/lib";  
            DYLIB_INSTALL_NAME_BASE = "$(INSTALL_PATH)";  
            LD_DYLIB_INSTALL_NAME = "$(DYLIB_INSTALL_NAME_BASE:standardizepath)/$(EXECUTABLE_PATH)";  
            DYLIB_COMPATIBILITY_VERSION = "1";  
            DYLIB_CURRENT_VERSION = "1";  
            FRAMEWORK_FLAG_PREFIX = "-framework";  
            LIBRARY_FLAG_PREFIX = "-l";  
            LIBRARY_FLAG_NOSPACE = YES;  
            STRIP_STYLE = "debugging";  
            GCC_INLINES_ARE_PRIVATE_EXTERN = YES;  
            CODE_SIGNING_ALLOWED = NO;  
        };  
        PackageTypes = (  
            com.apple.package-type.mach-o-library   // default  
        );  
    },  
 
在iPhoneOSPackageTypes.xcspec中添加下列片段  
 
// Mach-O dynamic library  
    {   Type = PackageType;  
        Identifier = com.apple.package-type.mach-o-library;  
        Name = "Mach-O Dynamic Library";  
        Description = "Mach-O dynamic library";  
        DefaultBuildSettings = {  
            EXECUTABLE_PREFIX = "";  
            EXECUTABLE_SUFFIX = ".dylib";  
            EXECUTABLE_NAME = "$(EXECUTABLE_PREFIX)$(PRODUCT_NAME)$(EXECUTABLE_VARIANT_SUFFIX)$(EXECUTABLE_SUFFIX)";  
            EXECUTABLE_PATH = "$(EXECUTABLE_NAME)";  
        };  
        ProductReference = {  
            FileType = compiled.mach-o.dylib;  
            Name = "$(EXECUTABLE_NAME)";  
            IsLaunchable = NO;  
        };  
    }, 

 

文件附上，可以直接下载替换，替换/修改前做好备份

[attachment=10546]

现在再编译应该不会提示工程不支持了，那么剩下的就是改变其编译选项了，就是libtool的参数问题。

我们需要修改下列文件

/Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/Libtool.xcspec  
/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Plug-ins/iPhoneOS Build System Support.
xcplugin/Contents/Resources/iPhoneLinkerOptions.xcspec  
在Libtool.xcspec中添加下列片段  
 
{   Identifier = com.apple.pbx.linkers.libtooldynamic;  
    Type = Linker;  
    Class = PBXLinkerSpecificationLibtool;  
    Name = "Libtool";  
    Description = "Create a dynamic library using Apple Mach-O Librarian (libtool)";  
    IsAbstract = Yes;       // This is an internal tool, so we keep it out of the user interface  
    BinaryFormats = (mach-o);  
    Architectures = (ppc, ppc7400, ppc7450, ppc970, ppc64, i386, x86_64);  
    CommandLine = "$(LIBTOOL) -dynamic -arch_only $(arch) -compatibility_version $(DYLIB_COMPATIBILITY_VERSION) 
-current_version $(DYLIB_CURRENT_VERSION) [options] [special-args] -o $(OutputPath)";     
 // 'special-args' includes the input files  
    RuleName = "Libtool $(OutputPath) $(variant) $(arch)";  
    ExecDescription = "Create Dynamic Library $(OutputPath:file)";  
    InputFileTypes = (  
        compiled.mach-o.objfile  
    );  
    Outputs = (  
        // We're a linker-like task, so we expect to be given an output path in 'OutputPath'.  
        "$(OutputPath)"  
    );  
    CommandOutputParser = XCGccCommandOutputParser;  
    Options = (  
        // LIBTOOL  
        {   Name = LIBTOOL;  
            Type = Path;  
            DefaultValue = "$(PLATFORM_DEVELOPER_BIN_DIR)/libtool";  
        },  
 
        // SDK  
        {   Name = SDKROOT;  
            Type = Path;  
            CommandLineFlag = "-syslibroot";  
            IsInputDependency = Yes;  
        },  
 
        // Search paths  
        {   Name = LIBRARY_SEARCH_PATHS;  
            Type = PathList;  
            FlattenRecursiveSearchPathsInValue = Yes;   // causes any paths that have a '/**' suffix to be replaced with matching paths  
            CommandLinePrefixFlag = "-L";  
        },  
 
        // Input file lists  
        {   Name = __INPUT_FILE_LIST_PATH__;  
            Type = Path;  
            DefaultValue = "$(LINK_FILE_LIST_$(variant)_$(arch))";      // this is set up for us as a read-only property  
            CommandLineFlag = "-filelist";  
            IsInputDependency = Yes;  
        },  
        {   Name = auxiliary_file_lists;  
            Type = PathList;  
            CommandLineFlag = "-filelist";  
            IsInputDependency = Yes;  
        },  
 
        // Various flags  
        {   Name = ALL_OTHER_LIBTOOLFLAGS;  
            Type = StringList;  
            DefaultValue = "$(LD_FLAGS) $(SECTORDER_FLAGS) $(OTHER_LDFLAGS) $(OTHER_LDFLAGS_$(variant))
  $(OTHER_LDFLAGS_$(arch)) $(OTHER_LDFLAGS_$(variant)_$(arch)) $(OTHER_LIBTOOLFLAGS) $(OTHER_LIBTOOLFLAGS_$(variant)) 
$(OTHER_LIBTOOLFLAGS_$(arch)) $(OTHER_LIBTOOLFLAGS_$(variant)_$(arch)) $(PRODUCT_SPECIFIC_LIBTOOLFLAGS)";  
            CommandLinePrefixFlag = "";  
        },  
        {   Name = EXPORTED_SYMBOLS_FILE;  
            Type = Path;  
            Condition = "$(SEPARATE_SYMBOL_EDIT) == NO";  
            CommandLineFlag = "-exported_symbols_list";  
            IsInputDependency = Yes;  
        },  
        {   Name = UNEXPORTED_SYMBOLS_FILE;  
            Type = Path;  
            Condition = "$(SEPARATE_SYMBOL_EDIT) == NO";  
            CommandLineFlag = "-unexported_symbols_list";  
            IsInputDependency = Yes;  
        },  
        {   Name = AdditionalCommandLineArguments;  
            Type = StringList;  
            CommandLinePrefixFlag = "";  
        },  
 
        {   Name = MACOSX_DEPLOYMENT_TARGET;  
            Type = String;  
            SetValueInEnvironmentVariable = "MACOSX_DEPLOYMENT_TARGET";  
        },  
    );  
}, 

在iPhoneLinkerOptions.xcspec中搜索

BasedOn = "default:com.apple.pbx.linkers.libtool"; 

替换成

BasedOn = "default:com.apple.pbx.linkers.libtooldynamic"; 

这样修改后编译iphone的library工程师都会使用dynamic的参数来编译，

注意：如果要编译iphone static library这里需要将libtooldynamic修改回libtool并重启Xcode（唯一的小缺陷，应该可以通过hook xcode编译设置函数来动态修改，很麻烦，需要很多时间去找到相应的方法，找了一会儿就没高兴继续，先将就用吧）

做好以上工作后就可以创建并编译iphone上dynamic library的工程了。

这里附上工程和target模板文件

[attachment=10547] 

解压此zip得到Cocoa Touch Dynamic Library文件夹，将其放到

/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Project Templates/Library/下面  
[attachment=10548] 

 

解压此zip得到Dynamic Library.trgttmpl文件，将其放到

/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Target Templates/Cocoa Touch/下面 

重启Xcode就可以看到了，如图

[attachment=10549]  [attachment=10550]  

测试结果

[attachment=10551]  

使用otool查看编译出来的dylib文件

[attachment=10552]  

成功！

谨记！！！！！需要修改文件来切换回编译static library！！！

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