C90 6.1.2.2 [as corrected by TC1], C99 6.2.2:
- For an identifier declared with the storage-class specifier
- extern in a scope in which a prior declaration of that
- identifier is visible, if the prior declaration specifies
- internal or external linkage, the linkage of the identifier at
- the later daclaration is the same as the linkage specified at
- the prior declaration. If no prior declaration is visible,
- or if the prior declaration specifies no linkage, then the
- identifer has external linkage.
+ For an identifier declared with the storage-class specifier
+ extern in a scope in which a prior declaration of that
+ identifier is visible, if the prior declaration specifies
+ internal or external linkage, the linkage of the identifier at
+ the later daclaration is the same as the linkage specified at
+ the prior declaration. If no prior declaration is visible,
+ or if the prior declaration specifies no linkage, then the
+ identifer has external linkage.
This is PR 14366. */