Where specify the path for #include files in NIOS II Eclipse

[Altera_Forum]

Hello, 

 I'm new in NIOS development tools and apologize in advance for probably silly question. So, the question is: How to take into account the .h files that are referenced (by #include statements) in the source code. I suppose that there are 2 options: 

• Add these files in the application directory tree (right-clicking on the project I didn't find respective option) 
• Add the path to these .h files somewhere in the project option (where exactly ? because exploring project options I didn't find an option for specifying path for .h files) 

  Here, for example, the snapshot from a simple project, taken from the book "embedded sopc design with nios ii processor and verilog examples". The compilation errors are related to unrecognized types alt_u8, alt_u32, that are declared here: c:\altera\15.1\ip\altera\nios2_ip\altera_nios2\hal\inc\alt_types.h  Thanks in advance.  http://www.alteraforum.com/forum/attachment.php?attachmentid=13314&stc=1

[Altera_Forum]

Finally I've found the location where the path to .h file must be specified. 

Here it is: project-->settings-->c/c++ general-->paths and symbols-->includes tab. Here I've added the location (button Add...) to .h files: c:\altera\15.1\nios2eds\components\altera_nios2\hal\inc. After compilation this path appeared in the project "Includes" folder. Nevertheless the compilation failed: an error is found in the source file alt_main.c (please see the screenshot below).  Any ideas ?  Thanks.  https://www.alteraforum.com/forum/attachment.php?attachmentid=13316

[Altera_Forum]

Resolved, 

 One needs to add the main application source file (where the function main is located) in elaboration process. Referring to the screenshot below, one should right-click on the source file and click on "add to nios ii build". After this the application is built without errors.  https://www.alteraforum.com/forum/attachment.php?attachmentid=13317

[Altera_Forum]

Here is build result without errors (with added source file to build process) - .elf file is generated. 

https://www.alteraforum.com/forum/attachment.php?attachmentid=13318

[Altera_Forum]

Try main application source file (where the function main is located) in elaboration process.