[CMake] include dependecy problem

[Michael Wild]

On 18. May, 2009, at 10:42, eial at cs.bgu.ac.il wrote:

>
> hello.
> I'm writing a c++ program under linux and I use cmake 2.6.4 to  
> manage compilation.
> in one of the files I need use external include files which resides  
> in /usr/include/folder_name/, lets call them file1.h and file2.h
> now if I declare the includes in my file like this:
> #include <file1.h>
> #include <file2.h>
>
> compilation fails with an error: file1.h: No such file or directory  
> and error: file2.h: No such file or directory.
> but when I declare the includes like this:
> #include <folder_name/file1.h>
> #include <folder_name/file2.h>
>
> compilation goes well. but, if this line exists in file2.h:
> #include <file1.h>
>
> compilation returns this: /usr/include/folder_name/file2.h error:  
> file1.h: No such file or directory.
> how can I fix this?
>
> thanks
>

Hi

IMHO this is an error in file2.h, which should do

#include "file1.h"

or

#include <folder_name/file1.h>

However, you can use your first approach together with find_path and  
include_directories as show below:

find_path( FOLDER_NAME_PATH file1 PATH_SUFFIXES folder_name )

if( FOLDER_NAME_PATH )
   include_directories( ${FOLDER_NAME_PATH} )
else( FOLDER_NAME_PATH )
   message( SEND_ERROR " Failed to find file1 or foldername/file1" )
endif( FOLDER_NAME_PATH )


Michael