lang尝试捕获失败 [英] clang try catch fails

问题描述

这是我谈论的代码部分。

Here is the portion of code I speak about.

try {
       std::cerr << "first try" << std::endl;
       po::store(po::parse_config_file(ifs, _configFileOptions, false), vm);

} catch(...) {           
       std::cerr << "second try" << std::endl;            
}

只是为了寻求细节，我使用boost program_options来解析配置文件。由于我在无法识别的文件中放置了一个选项，因此boost引发了一个异常。

Just for the seek of details , I m using boost program_options to parse a configuration file. An exception is raised by boost since I put an option in the file that is unrecognized.

Clang不能捕获此异常是一个问题。基本上我只在输出中看到

There is a problem with Clang not catching this exception. Basically I only see in the output

first try
libc++abi.dylib: terminating with uncaught exception of type boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::program_options::unknown_option> >: unrecognised option 'TestFrequency'
Abort trap: 6

这是我的clang版本：

Here is my clang version:

c++ --version
Apple LLVM version 7.3.0 (clang-703.0.31)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

编辑：如果没有异常，则进行解析并且一切正常。

When there is no exception, the parsing and everything works fine.

推荐答案

对我来说，解决方案是删除链接器标志 -Wl，-no_compact_unwind（Catalina，Apple clang版本11.0.0（clang-1100.0.33.17））

For me the solution was to remove the linker flags "-Wl,-no_compact_unwind" (Catalina, Apple clang version 11.0.0 (clang-1100.0.33.17))

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