45 lines
1.4 KiB
Diff
45 lines
1.4 KiB
Diff
2016-01-28 Jakub Jelinek <jakub@redhat.com>
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PR debug/66869
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* decl.c (wrapup_globals_for_namespace): Warn about unused static
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function declarations.
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* g++.dg/warn/Wunused-function2.C: New test.
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--- gcc/cp/decl.c.jj 2016-01-25 09:31:01.000000000 +0100
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+++ gcc/cp/decl.c 2016-01-28 13:14:10.783286136 +0100
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@@ -879,6 +879,24 @@ wrapup_globals_for_namespace (tree name_
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tree *vec = statics->address ();
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int len = statics->length ();
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+ if (warn_unused_function)
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+ {
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+ tree decl;
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+ unsigned int i;
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+ FOR_EACH_VEC_SAFE_ELT (statics, i, decl)
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+ if (TREE_CODE (decl) == FUNCTION_DECL
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+ && DECL_INITIAL (decl) == 0
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+ && DECL_EXTERNAL (decl)
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+ && !TREE_PUBLIC (decl)
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+ && !DECL_ARTIFICIAL (decl)
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+ && !TREE_NO_WARNING (decl))
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+ {
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+ warning (OPT_Wunused_function,
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+ "%q+F declared %<static%> but never defined", decl);
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+ TREE_NO_WARNING (decl) = 1;
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+ }
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+ }
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+
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/* Write out any globals that need to be output. */
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return wrapup_global_declarations (vec, len);
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}
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--- gcc/testsuite/g++.dg/warn/Wunused-function2.C.jj 2016-01-28 13:40:10.201053364 +0100
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+++ gcc/testsuite/g++.dg/warn/Wunused-function2.C 2016-01-28 13:41:43.006788487 +0100
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@@ -0,0 +1,6 @@
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+// PR debug/66869
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+// { dg-do compile }
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+// { dg-options "-Wunused-function" }
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+
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+static void test (void); // { dg-warning "'void test..' declared 'static' but never defined" }
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+int i;
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