On Mon, Dec 02, 2002 at 07:49:46PM +0530, Guruhema Prasad N wrote:
> 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".
Short version: don't use -ansi if you don't know what C89 defines and
what not.
1) M_PI is not part of ISO C89.
2) sys/stat.h, and therefore S_IFREG aren't part of ISO C89 either.
Both are defined by Single UNIX Specification, so if you insist on the
-ansi for whatever reason, you'll probably want to put
#define _XOPEN_SOURCE 600
at start of your source file (before the includes).
Mirek
_______________________________________________
Redhat-devel-list mailing list
[EMAIL PROTECTED]
https://listman.redhat.com/mailman/listinfo/redhat-devel-list
