Xcode 4.3和C ++ 11包括路径 [英] Xcode 4.3 and C++11 include paths

问题描述

我安装了Xcode 4.3并想测试这个C ++ 11程序：

I installed Xcode 4.3 and want to test this C++11 program:

#include <type_traits>

int main()
{
}

但是，它找不到 type_traits 头：

~ $ c++ -o test main.cpp
main.cpp:1:10: fatal error: 'type_traits' file not found
#include <type_traits>
         ^
1 error generated.

看来我使用的是正确的编译器：

It seems that I am using the correct compiler:

~ $ c++ -v
Apple clang version 3.1 (tags/Apple/clang-318.0.45) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin11.3.0
Thread model: posix

：

~ $ `c++ --print-prog-name=cc1plus` -v
ignoring nonexistent directory "/usr/include/c++/4.2.1/i686-apple-darwin11"
ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin11/4.2.1/../../../../i686-apple-darwin11/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/4.2.1
 /usr/include/c++/4.2.1/backward
 /usr/local/include
 /Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin11/4.2.1/include
 /usr/include
 /System/Library/Frameworks (framework directory)
 /Library/Frameworks (framework directory)
End of search list.

上述路径确实不包含 type_traits 标题。搜索命令显示可以在两个位置找到：

Above paths do indeed not contain the type_traits headers. A search command reveals that can be found in two locations:

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/v1/type_traits
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/c++/v1/type_traits

显然我的编译器默认值有问题。如何配置我的编译器，使其在正确的位置找到 type_traits 头？

Apparently something is wrong with my compiler defaults. How can I configure my compiler so that it finds the type_traits header in the right location?

遵循@ sehe的建议：

Following @sehe's suggestion:

~ $ clang++ -v -fshow-source-location -std=c++0x main.cpp
Apple clang version 3.1 (tags/Apple/clang-318.0.45) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin11.3.0
Thread model: posix
 "/usr/bin/clang" -cc1 -triple x86_64-apple-macosx10.7.3 -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name main.cpp -pic-level 1 -mdisable-fp-elim -relaxed-aliasing -masm-verbose -munwind-tables -target-cpu core2 -target-linker-version 128.2 -v -resource-dir /usr/bin/../lib/clang/3.1 -fmodule-cache-path /var/folders/d6/sf96r2ps457230x3v8yj52s40000gp/T/clang-module-cache -std=c++0x -fdeprecated-macro -fdebug-compilation-dir /Users/francis -ferror-limit 19 -fmessage-length 174 -stack-protector 1 -fblocks -fobjc-runtime-has-arc -fobjc-runtime-has-weak -fobjc-dispatch-method=mixed -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o /var/folders/d6/sf96r2ps457230x3v8yj52s40000gp/T/main-sUcT7k.o -x c++ main.cpp
clang -cc1 version 3.1 based upon llvm 3.1svn default target x86_64-apple-darwin11.3.0
ignoring nonexistent directory "/usr/include/c++/4.2.1/i686-apple-darwin10/x86_64"
ignoring nonexistent directory "/usr/include/c++/4.0.0"
ignoring nonexistent directory "/usr/include/c++/4.0.0/i686-apple-darwin8/"
ignoring nonexistent directory "/usr/include/c++/4.0.0/backward"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/4.2.1
 /usr/include/c++/4.2.1/backward
 /usr/local/include
 /usr/bin/../lib/clang/3.1/include
 /usr/include
 /System/Library/Frameworks (framework directory)
 /Library/Frameworks (framework directory)
End of search list.
main.cpp:1:10: fatal error: 'type_traits' file not found
#include <type_traits>
         ^
1 error generated.

似乎没有看到Xcode.app包。

It doesn't seem to look in the Xcode.app bundle at all.

一个可能的原因是我安装了Xcode和Xcode的命令行工具。后者在 / usr 文件夹中安装了二进制文件。

One possible reason is that I installed both Xcode and the "Command line tools for Xcode". The latter installed binaries in the /usr folder.

我刚刚发现 type_traits 标题也可以在 / usr / include 中找到：

I just found that the type_traits header can also be found in /usr/include :

~ $ find /usr/include -type f -name type_traits
/usr/include/c++/4.2.1/tr1/type_traits
/usr/include/c++/v1/type_traits

更新2

感谢@sehe ，@rob和@Howard我发现这个工作原理：

Update 2

Thanks to @sehe, @rob and @Howard I found that this works:

clang++ -stdlib=libc++ -o test main.cpp

推荐答案

您需要：

-std=c++0x

选择C ++ 11。您需要：

to select C++11. And you need:

-stdlib=libc++

以选择 libc ++ 。默认情况下，使用gcc 4.2附带的std :: lib，它是pre-C ++ 11。

to select libc++. By default, the std::lib that shipped with gcc 4.2 is used, which is pre-C++11.

这篇关于Xcode 4.3和C ++ 11包括路径的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！