[LLVMbugs] [Bug 16428] New: support __attribute__((warning(""))) and __attribute__((error("")))

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=16428

            Bug ID: 16428
           Summary: support __attribute__((warning(""))) and
                    __attribute__((error("")))
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: b.r.longbons at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

GCC supports these attributes for warning if a function is actually used.

They are subtly different than __attribute__((deprecated(""))) in that they are
emitted after DCE. 
They also give a different type of warning: [enabled by default] instead of
[-Wdeprecated-declarations]

I don't know much about LLVM internals, but you might need to take care for the
case where the attribute is on an inline function.

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