Debug options added for C, C++ & Fortran

[Sylvestre Ledru]

Hello guys,

I committed an update which increases the number of warnings.

====== For C ======
-Wold-style-definition: warning about the old style declaration
void myBloodyFunction(plop) int plop {

It will also complain about:
void myGreatFucking(){ 
(void is missing)

-g3: added more symbols into the binary (like macros).

====== For C++ ======
-Weffc++ (copy & paste of the man g++)
Warn about violations of the following style guidelines from Scott
Meyers’ Effective C++ book:

           ·   Item 11:  Define a copy constructor and an assignment
operator for classes with dynamically allocated memory.

           ·   Item 12:  Prefer initialization to assignment in
constructors.

           ·   Item 14:  Make destructors virtual in base classes.

           ·   Item 15:  Have "operator=" return a reference to *this.

           ·   Item 23:  Don’t try to return a reference when you must
return an object.

           Also warn about violations of the following style guidelines
from Scott Meyers’ More Effective C++ book:

           ·   Item 6:  Distinguish between prefix and postfix forms of
increment and decrement operators.

           ·   Item 7:  Never overload "&&", "||", or ",".

           When selecting this option, be aware that the standard
library headers do not obey all of these guidelines; use
           grep -v to filter out those warnings.


-g3 has been also added here


====== For Fortran ======
(if you don't care about Fortran warnings, stop using --enable-debug and
use --enable-debug-C & --enable-debug-CXX)


-Wimplicit:
Warn when implicit declaration are used (yet, we have tones of them)


 -Wsurprising, once more, a lazy C/P:
Produce a warning when "suspicious" code constructs are encountered.
While technically legal these usually indicate that an error has been
made.

           This currently produces a warning under the following
circumstances:

           ·   An INTEGER SELECT construct has a CASE that can never be
matched as its lower value is greater than its upper value.

           ·   A LOGICAL SELECT construct has three CASE statements.

           ·   A TRANSFER specifies a source that is shorter than the
destination.

Sylvestre