QA·C Help - 1306

	1306	Multiple tentative definitions of '%s'. This is not allowed in C++.

C++ compatibility

This tentative definition follows an earlier tentative definition of the same object.

A tentative definition of an object in C consists of a file scope declaration without an initializer and without the storage-class specifier extern. If it is followed by another tentative definition or a definition which does have an explicit initializer, it is treated simply as a declaration; otherwise it is treated as a definition with an implicit initializer of 0.

Tentative definitions do not exist in C++; they are always treated as definitions. If a translation unit contains more than one tentative definition or a tentative definition followed by an explicit definition, C++ will consider the second one to be a duplicate definition - which is not allowed.

For example:


/*PRQA S 3207,3211,3408,3447 ++*/

int a;
int a;                          /* Message 1306 */

static short b;
static short b;                 /* Message 1306 */

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