Intel® C++ Compiler
Community support and assistance for creating C++ code that runs on platforms based on Intel® processors.
7956 Discussions

seeking exact equivalent to gcc's -fno-strict-aliasing flag for icc

humble_student
Beginner
‎03-14-2011 02:51 PM
547 Views
I am compiling a Python/Cython/C project with Intel's compiler, and I need to find an icc option that is _exactly_ equivalent to gcc's -fno-strict-aliasing flag. It appears that icc accepts -fno-strict-aliasing directly, but this behavior is not documented in the "Portability Options" section of the manual, so I am not sure whether the flag is simply being silently ignored. It appears that icc's -no-ansi-alias flag is related to gcc's -fno-strict-aliasing flag, but I would like definitive confirmation either that icc correctly accepts -fno-strict aliasing or that -no-ansi-alias is an exact substitute. Thanks.
0 Kudos

Link Copied

2 Replies
Om_S_Intel
Employee
‎03-14-2011 11:08 PM
547 Views

The icc acepts correctly -fno-strict-aliasing.

0 Kudos
Copy link
TimP
Honored Contributor III
‎03-15-2011 07:16 AM
547 Views
icc default option -no-ansi-alias is equivalent to gcc -no-strict-aliasing. Remember that an application which depends on this is in violation of C and C++ standards and many optimizations will be disabled.
0 Kudos
Copy link
Reply

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.