Nios II Software Build Tools for Eclipse - c99 mode

using the software build tools eclipse gui

Right Click On Project Folder in the Project Explorer

Select Properties

Nios II Application Properties

User Flags: -std=c99

With software build tools sometimes setting -std=c99 in the GUI doesn't seem to stick :mad:. I never figured out why :confused:. What I did to make it stick was to edit the projects MAKEFILE directly by setting the APP_FLAGS_USER_FLAGS to include -std=c99 .

using the makefile (direct method)

search for app_cflags_user_flags

app_cflags_user_flags := -std=c99

legacy nios ii tools

Right Click On Project Folder in the Project Explorer (aka NIOS II C/C++ Projects tab)

Select Properties

Select The C/C++ Build item

Tool Settings Tab

NIOS II Compiler-->General Folder

Compiler Flags: -std=c99