Datasheet

C and C++ Compilers

2.3.12 Controlling error messages

The compiler issues errors to indicate serious problems in the code it is attempting to

compile. The compiler options described below enable you to:

• turn off specific recoverable errors

• downgrade specific errors to warnings.

Caution

These options force the compiler to accept C and C++ source that normally produces

errors. If you use any of these options to ignore error messages, it means that your

source code does not conform to the appropriate C or C++ standard.

These options can be useful during development, or when importing source code from

other environments. However, they might permit code to be produced that does not

function correctly. It is generally better to correct the source than to use options to

switch off error messages.

The general form of the

-E

compiler option is:

-E[options][+][options]

where

options

is a set of one or more of the letters

, or

as described below.

If the

character is included in the characters following the

-E

, the error messages

corresponding to any following letters are enabled rather than suppressed.

Note

The

-E

option on its own without any options is the preprocessor switch. See Setting

preprocessor options on page 2-15.

You can specify multiple options. For example:

-Eac

turns off the error messages specified by

and

The following options are on by default:

-Ea

For C++ only, this option downgrades access control errors to warnings.

For example:

class A { void f() {}; }; // private member

A a;

void g() { a.f(); } // erroneous access

C3032E: ’A::f’ is a non-public member