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-rw-r--r--gcc/c-common.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/c-common.h b/gcc/c-common.h
index 8cdbbcee42a..038b23982e3 100644
--- a/gcc/c-common.h
+++ b/gcc/c-common.h
@@ -606,7 +606,7 @@ extern int print_struct_values;
/* ???. Undocumented. */
-const char *constant_string_class_name;
+extern const char *constant_string_class_name;
/* Warn if multiple methods are seen for the same selector, but with
different argument types. */
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