gcc compilation problem with -ansi option,

[Guruhema Prasad N]

Hi,

I am using redhatLinux8.0, I am facing the following problems, can you please help any body.
Problem 1:-
I am using option "gcc -Wuninitialized -O -ansi", but its giving undeclared variables for the math defines "M_PI" which is defined in "/usr/include/math.h" file. If I remove "-ansi" option, its compiles properly, but I want to use "-ansi" option., I need to add any other options along with "-ansi"

Problem 2:-

Similarly, if I use "-ansi" option, I can't access the define "S_IFREG" in file "/usr/include/sys/stat.h".

Please suggest, what options I have to use along with "-ansi" to resolve above problems.

Thanks,

Guruhema





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