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-rw-r--r--gcc/tree.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/tree.h b/gcc/tree.h
index 80a3282a237..2ec1274b957 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -2609,6 +2609,8 @@ extern HOST_WIDE_INT get_alias_set PARAMS ((tree));
/* In c-common.c */
extern HOST_WIDE_INT lang_get_alias_set PARAMS ((tree));
+struct obstack;
+
/* In tree.c */
extern int really_constant_p PARAMS ((tree));
extern void set_identifier_size PARAMS ((int));