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 Redhat-devel-list@redhat.com https://listman.redhat.com/mailman/listinfo/redhat-devel-list
