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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