User guide

GUI Reference

 Undefined Symbols—Specifying a symbol here is equivalent to a

#undefine macro in source code.

o General—Configures known flags for the compiler. For a complete list of

flags, type nios2-elf-gcc -v --help on a command line or refer to the

GNU tools documentation included with the Nios II Embedded Design Suite

(EDS).

 Compiler Flags—Allows additional command line flags to pass to

the compiler.

 Optimization Level—Configures the compiler optimization level.

Options are -O0 to -O3. The compiler optimizes for both size and

speed.

 Debug Level—Configures the debug level.

 Include Paths—Lists where the compiler searches for C header

files. The Nios II IDE creates a search path including the project

directory, device driver directories, the Newlib standard C library,

etc. Use Include Paths to specify additional paths to find files in

other locations. To add an include path, click New and enter the

path. The paths are searched in the order they appear from top to

bottom. To modify the search order, click on a list entry then click

Move Up and Move Down accordingly.

 Enable All Warnings (-Wall)—Enables additional warnings when

compiling.

Linker—Displays linker flags configured within this category for the nios2-elf-

gcc compiler command.

o General—Configures known flags for the linker. For additional information

on linker flags, type nios2-elf-ld --help on a command line or see the

Nios II documentation located at <Nios II EDS install

path>/documents/gnu-tools/binutils/ld.html.

Error Parser Tab

This tab gives advanced users control over which types of build errors the Nios II IDE

displays in the Problems view.

Note: Altera recommends leaving these settings at their default values.

Binary Parser Tab

This tab allows advanced users to choose which binary parser to use to read build files in

the IDE.

Note: Altera recommends using the GNU Elf Parser.