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An identifier declared in different scopes or multiple times within the same scope can be made to refer to the same object or function by _linkage_. An identifier can be classified as _externally linked_, _internally linked_, or _not-linked_. These three kinds of linkage have the following characteristics \[[Kirch-Prinz 02|AA. C References#Kirch-Prinz 02]\]: |
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Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
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DCL36-C | 1 (low) | 2 (probable) | 3 (low) | P6 | L2 |
Automated Detection
The LDRA tool suite V 7.6.0 is able to detect violations of this rule.
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\[[Banahan 03|AA. C References#Banahan 03]\] [Section 8.2, "Declarations, Definitions and Accessibility"|http://publications.gbdirect.co.uk/c_book/chapter8/declarations_and_definitions.html]
\[[ISO/IEC 9899-1999|AA. C References#ISO/IEC 9899-1999]\] Section 6.2.2, "Linkages of identifiers"
\[[Kirch-Prinz 02|AA. C References#Kirch-Prinz 02]\]
\[[MISRA 04|AA. C References#MISRA 04]\] Rule 8.1 |
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