Question

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“No newline at end of file” compiler warning

i am a Linux user and use gcc at work But at home i have installed cygwin package and using its gcc on my windows machine.

when ever i make any .c file and run its shows following warning

Warning : No new line at end of file 

when i add extra new line at the end of that c file warning disappeared.
i haven’t faced such warning while working with gcc in Linux.

so

why i am getting this warning? what does it mean ?

Edit

Whats the need or whats the advantage of doing this ?

if it is part of c programming standard then why it doesnt give any error while working in linux ?

Answer 1

The C language requires that every source file must end with a newline (from C99 5.1.1.2/1):

A source file that is not empty shall end in a new-line character, which shall not be immediately preceded by a backslash character before any such splicing takes place.

(C++ also had this requirement prior to C++11)