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* c.texi (Allocating File-Scope): Fix -fcommon description. 

The default depends on GCC's release and target; no
--warn-common is supported.
This commit is contained in:
Ineiev 2025-04-26 14:19:27 +00:00
parent 6513ea4238
commit c677be889b
1 changed files with 3 additions and 2 deletions
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@ -9833,11 +9833,12 @@ the same variable in this way, and that is sufficient for all of them
to use the variable.
@c @opindex -fno-common
@c @opindex --warn_common
@c @opindex -fcommon
In programs that are very large or have many contributors, it may be
wise to adopt the convention of never using tentative definitions.
You can use the compilation option @option{-fno-common} to make them
an error, or @option{--warn-common} to warn about them.
an error, or @option{-fcommon} to enable them. The default depends
on the version of GCC and its target.
If a file-scope variable gets its space through a tentative
definition, it starts out containing all zeros.