Implement basic support for merging function declarations across
translation units.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95794 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/ASTMerge/Inputs/function2.c b/test/ASTMerge/Inputs/function2.c
new file mode 100644
index 0000000..ad81c07
--- /dev/null
+++ b/test/ASTMerge/Inputs/function2.c
@@ -0,0 +1,6 @@
+typedef int Int;
+void f0(Int);
+void f1(Int, double);
+void f2(int, int);
+void f3(int);
+static void f4(float, float);