compiling with c89 and c99 does gcc 4.4.2 default to c99?

Question

I am using gcc 4.4.2 on linux

I am just wondering does gcc automatically default to compiling with c99 as its the latest standard?

How can I specify if I want to compile with c89 or c99?

Many thanks for any advice,

Answer 1

One reason not to use C99 by default is because this standard is not fully implemented in the compiler yet. However, I believe that you can set the default mode when compiling gcc, so if the choice of standards really matters for you, it's better always to pass the option.

The options are -std=c99 and -std=c89 respectively.