AWS 开发工具包链接器标志与导入的项目冲突答案

【问题标题】：AWS SDK Linker Flags conflicting with imported projectAWS 开发工具包链接器标志与导入的项目冲突
【发布时间】：2015-06-03 23:38:16
【问题描述】：

我已经成功使用 AWS 开发工具包框架获得了一个应用程序，现在我正在尝试将一个静态库作为自制框架导入，并与我的其他几个项目共享代码。

问题是：为了导入我的静态库，我 need to add -ObjC 链接器标志以导入库，但是每当我添加该链接器标志时，AWS 吓坏了并给了我 40 多个红色编译错误。

我对链接器标志和库导入完全陌生，所以我真的不知道从哪里开始。我做了一些研究，但我能找到的最好的线索是我可以使用-force_load 而不是-ObjC 的建议，但这似乎需要在“构建阶段”部分手动添加每个“.m”文件，并且我的库包含数百个此类文件。

有没有比添加每个文件更简单的解决方案，以便我可以使用-force_load？我怎样才能让 AWK SDK 和导入我的库的需求一起很好地发挥作用？

编辑：根据 cmets 中的建议，这是我在添加 -ObjC 链接器标志时遇到的错误。如果没有该标志（并且没有添加静态库），应用程序将使用 AWSiOSSDKv2 框架成功编译。但是添加该链接器标志（据我了解，静态库需要它，但甚至在添加该库之前）会立即导致：

[删除代码以适应字符限制]

编辑 2： 根据 Yosuke Matsuda 的回答，我添加了 libsqlite3.dylib，这是我遗漏的。现在以前的错误已经消失了，但是我有几十个（几百个？）“重复符号”行，以一个红色的“链接器命令失败，退出代码 1”错误结束。（我会把它们都包括在内，但有趣的是，他们把我的帖子放在了 73,111 个字符上，远远超过了 30,000 个字符的限制。）

有趣的是，它们似乎是由框架本身的要求引起的冲突（例如，AWS Framework 中的AWSCore 需要Bolts 框架，但它们似乎与一堆重复的符号冲突？ )。

并且，和以前一样，只需从链接器标志中删除 -ObjC 即可让应用程序正常编译并成功。

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[And on and on and on, ending with...]
ld: 260 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

【问题讨论】：

您应该发布实际的编译器错误消息和所有依赖的框架。如果您看到重复符号错误，则您多次包含相同的目标文件。此外，- force_load 不需要您添加每个 .m 文件。您强制加载静态库，而不是源文件。
@YosukeMatsuda 添加。我没有遇到过这样的阅读错误，但它似乎是一大堆“未定义的符号”错误，而不是“重复的符号”。问题是，这是一个框架，所以我不能（或认为我不能）改变它的内部运作，可以吗？据我所知，我只能访问.h 文件。

标签： ios amazon-web-services import aws-sdk linker-flags

【解决方案1】：

适用于 iOS 的 AWS 移动开发工具包依赖于 libsqlite3.dylib、libz.dylib 和 SystemConfiguration.framework，但您并未提供它们。这就是错误消息的原因。 AWS Mobile SDK for iOS Developer Guide 的这一部分列出了必要的依赖关系。

【讨论】：

我错过了libsqlite3.dylib，谢谢！但是现在我遇到了您所说的那些“重复符号”错误。问题已编辑，有什么建议吗？
您使用的是什么版本的 SDK？在 2.0.15 之前，SDK 存在嵌入第三方库的问题。您应该使用 2.0.15 或更高版本，看看它是否能解决问题。