在 C++ CMake 项目中包含路径

Question

I have included <time.h> in my C++ program I create in Eclipse C++ Cmake project that runs on Ubuntu. I'm trying to navigate to <time.h> file, but get error could not find include file 'time.h' in include paths .

Where I can set include paths in my C++ CMake project?

Answer 1

time.h is a system header so even if Eclipse is not able to navigate to it the compiler should still be able to find it.

Selecting Index -> Search For Unresolved Includes in the context menu of the project will give you the list of unresolved includes which you can search in /usr/include and add containing directories to C++ Include Paths and Symbols in Project Properties.

On my system I had to add /usr/include/c++/4.6/x86_64-linux-gnu for bits/c++config.h to be resolved and a few more directories.

Don't forget to rebuild the index (Index -> Rebuild) after adding include directories.

Answer 2

First, to tell CMake to add the directory as -I to the compilation command line, you use include directories(). Second, in your add executable() or add library() call, you list the headers. When contrasted with other ways of making Makefile, CMake is more like a script language.