Developer Guide and Reference

Contents

g

Tells the compiler to generate a level of debugging information in the object file.

Syntax

Linux:
-g
[
n
]
Windows:
See option Zi, Z7, ZI.
Arguments
n
Is the level of debugging information to be generated. Possible values are:
0
Disables generation of symbolic debug information.
1
Produces minimal debug information for performing stack traces.
2
Produces complete debug information. This is the same as specifying
-g
with no
n
.
3
Produces extra information that may be useful for some tools.
Default
-g or -g2
The compiler produces complete debug information.
Description
Option
-g
tells the compiler to generate symbolic debugging information in the object file, which increases the size of the object file.
The compiler does not support the generation of debugging information in assemblable files. If you specify this option, the resulting object file will contain debugging information, but the assemblable file will not.
This option turns off option
-O2
and makes option
-O0
the default unless option
-O2
(or higher) is explicitly specified in the same command line.
Specifying the
-g
or
-O0
option sets the
-fno-omit-frame-pointer
option.
This content is specific to C++; it does not apply to
DPC++
.
On Linux*, the -debug inline-debug-info option will be enabled by default if you compile with optimizations (option
-O2
or higher) and debugging is enabled (option
-g
).
When option
-g
is specified, debugging information is generated in the DWARF Version 3 format. Older versions of some analysis tools may require applications to be built with the
-gdwarf-2
option to ensure correct operation.
IDE Equivalent
Visual Studio:
None
Eclipse:
General > Include Debug Information
Alternate Options
Linux: None
Windows: /Zi, /Z7
, /ZI

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.