PR4290: Handle vfprintf in a way that doesn't give any diagnostics for
valid declarations and doesn't give an error for autoconf-style invalid
redeclarations. This isn't quite ideal, but I don't see any other way
easy way to handle it. (The only thing I can think of that's reasonably
general is adding a new builtin type FILETy which is only compatible
with a type equivalent to FILE, and that seems like overkill.)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72760 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/vfprintf-invalid-redecl.c b/test/Sema/vfprintf-invalid-redecl.c
new file mode 100644
index 0000000..02c5061
--- /dev/null
+++ b/test/Sema/vfprintf-invalid-redecl.c
@@ -0,0 +1,6 @@
+// RUN: clang-cc %s -fsyntax-only -verify
+// PR4290
+
+// The following declaration is not compatible with vfprintf(), but make
+// sure this isn't an error: autoconf expects this to build.
+char vfprintf(); // expected-warning {{incompatible redeclaration of library function 'vfprintf'}} expected-note {{'vfprintf' is a builtin}}