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Subject: [Bug c/55830] New: inline and __attribute__((always_inline)) treated differently for unused-function warning
Date: Sun, 30 Dec 2012 21:39:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55830

             Bug #: 55830
           Summary: inline and __attribute__((always_inline)) treated
                    differently for unused-function warning
    Classification: Unclassified
           Product: gcc
           Version: 4.7.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: brooks@gcc.gnu.org


Consider the case of a header file containing definitions of static inline
functions, included in a number of source files (which may not use all of the
defined functions), compiled with C99 and -Wall -Wextra.

If the functions are defined as "static inline", GCC will mask the "unused
function" warning.

However, if the functions are defined as "static
__attribute__((always_inline))", then GCC will omit "unused function" warnings
whenever one of them is not used in a given source file.

This really should be consistent, and it would be ideal to maintain the
no-warning behavior and have that apply to both cases.