"gcc -xc -E -v -" can show the include search paths. Best Regards Nan Xiao On Wed, Aug 5, 2015 at 6:34 PM, Abhilash Mhaisne <abhilashmhaisne@gmail.com> wrote:

By default gcc does search under /usr/include. I am not sure about /usr/local/include though. If header files at the top are #included as "your_build_direc/include/some_header_file.h" then gcc will look into that path. Otherwise if it is #include <some_header_file.h> , it will search under /usr/include and anything that is under C_INCLUDE_PATH variable. See man page of gcc for more.

Regards, Abhilash Mhaisne

On Wed, Aug 5, 2015 at 3:13 PM, Nan Xiao <xiaonan830818@gmail.com> wrote:

...

Hi all,

I want to make sure the searching header file path when building Linux kernel: Per my understanding, the gcc only find header files in current building linux directory: include/*, won't search system header file path: such as /usr/inclue, /usr/local/include, etc.

Is my understanding right? Thanks very much in advance!

Best Regards Nan Xiao

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