Re: [PATCH] Always include defs.h first.

[Yao Qi <yao at codesourcery dot com>]

On 11/08/2012 04:11 AM, Pedro Alves wrote:
> defs.h should always be the first included header in a .c file.  In

I agree on this point.

> turn, this means that a foo.h header should not need to include
> defs.h, as the .c file always includes defs.h before including foo.h.

I am afraid I can't agree.  If foo.h needs defs.h, it should include 
defs.h, rather than replying on foo.h's includer to include defs.h.

> diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
> index 05a030a..fbc2479 100644
> --- a/gdb/arm-tdep.c
> +++ b/gdb/arm-tdep.c
> @@ -18,9 +18,10 @@
>      You should have received a copy of the GNU General Public License
>      along with this program.  If not, see<http://www.gnu.org/licenses/>.  */
>
> +#include "defs.h"
> +
>   #include <ctype.h>		/* XXX for isupper ().  */
>
> -#include "defs.h"
>   #include "frame.h"
>   #include "inferior.h"
>   #include "gdbcmd.h"

What is the include order of "defs.h" and system headers, such as 
<ctype.h> and <stdio.h>?  When I learnt C programming some years ago, it 
was said system headers are included first, and then your own headers. 
This rule doesn't apply here?

--
Yao