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help regarding "-ansi" flag

From: Sayali Surve <sayalisurve at yahoo dot com>
To: gcc-help at gcc dot gnu dot org
Date: Sat, 14 Mar 2009 15:38:55 +0530 (IST)
Subject: help regarding "-ansi" flag

Hi,

For gcc 4.1.2, as per the man page of gcc, the default standard is gnu89 i.e. ISO C90 plus GNU extensions. 
"-ansi" also supports ISO C90 programs.
Is the difference in using and not using "-ansi" flag is not enabling GNU extensions and enabling GNU extensions or is there any other difference as well??

Thanks for help,
S



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