[metadata]
id = "DCL15-C"
type = "recommendation"
category = "DCL"
number = 15
title = "Declare file-scope objects or functions that do not need external linkage as static"
description = """
If a file-scope object or a function does not need to be visible outside of the
file, it should be hidden by being declared asstatic. This practice creates more
modular code and limits pollution of the global name space. Subclause 6.2.2 of
the C Standard [ISO/IEC 9899:2011] states: and
"""
severity = "Low"
likelihood = "Unlikely"
priority = "P1"
level = "L3"
cert_version = "2016 Edition (Wiki)"
last_modified = "May 19, 2025"
[rules.cert_c.DCL15-C]
enabled = true
[references]
wiki = "https://wiki.sei.cmu.edu/confluence/display/c/DCL15-C.+Declare+file-scope+objects+or+functions+that+do+not+need+external+linkage+as+static"