编译错误： file not found with angled include use quotes instead #include 和 #include "lualib.h"

http://stackoverflow.com/questions/17465902/use-of-external-c-headers-in-objective-c

问题：

7down votefavorite 6

In my iOS project I need to use an external library written in C++. The C++ header files are all in one directory. I've added these C++ headers to my Xcode project, and also specified a header search path (in Build Settings). The issue is that these C++ headers include each other using < > angle brackets. This results in: 'filename.h' file not found with <angled> include, use "quotes" instead. The weird thing is that Xcode does not complain about all headers. Also the same header #include'd in one file is fine, while an issue when #include'd in another. I think this is caused by the fact that these headers #include each other. Why doesn't doesn't the search path work? Is there a way to resolve this without modifying these header files? Thanks!

解答：

16down voteaccepted

#include <bla.h> is meant for standard library or framework headers, and the search strategy Is different than that used for #include "bla.h" See for example What is the difference between #include <filename> and #include "filename"? As a workaround, you can set the Xcode build setting "Always Search User Paths" to YES.