From ab0a87243e9bb97355cb0e4f53b2156cd68207fe Mon Sep 17 00:00:00 2001
From: Niko Matsakis <niko@alum.mit.edu>
Date: Thu, 24 Mar 2016 13:20:08 -0400
Subject: [PATCH] test for immediate symbol name hashing

---
 src/test/run-make/a-b-a-linker-guard/Makefile |  7 +++++++
 src/test/run-make/a-b-a-linker-guard/a.rs     | 10 ++++++++++
 src/test/run-make/a-b-a-linker-guard/b.rs     |  7 +++++++
 3 files changed, 24 insertions(+)
 create mode 100644 src/test/run-make/a-b-a-linker-guard/Makefile
 create mode 100644 src/test/run-make/a-b-a-linker-guard/a.rs
 create mode 100644 src/test/run-make/a-b-a-linker-guard/b.rs

diff --git a/src/test/run-make/a-b-a-linker-guard/Makefile b/src/test/run-make/a-b-a-linker-guard/Makefile
new file mode 100644
index 00000000000..4a1b87de88d
--- /dev/null
+++ b/src/test/run-make/a-b-a-linker-guard/Makefile
@@ -0,0 +1,7 @@
+-include ../tools.mk
+
+all:
+	$(RUSTC) a.rs --cfg x -C prefer-dynamic
+	$(RUSTC) b.rs -C prefer-dynamic
+	$(RUSTC) a.rs --cfg y -C prefer-dynamic
+	$(call RUN,b) 2>&1 | grep "undefined symbol"
diff --git a/src/test/run-make/a-b-a-linker-guard/a.rs b/src/test/run-make/a-b-a-linker-guard/a.rs
new file mode 100644
index 00000000000..f2511b044b5
--- /dev/null
+++ b/src/test/run-make/a-b-a-linker-guard/a.rs
@@ -0,0 +1,10 @@
+#![crate_name = "a"]
+#![crate_type = "dylib"]
+
+#[cfg(x)]
+pub fn foo(x: u32) { }
+
+#[cfg(y)]
+pub fn foo(x: i32) { }
+
+
diff --git a/src/test/run-make/a-b-a-linker-guard/b.rs b/src/test/run-make/a-b-a-linker-guard/b.rs
new file mode 100644
index 00000000000..f30df120a3b
--- /dev/null
+++ b/src/test/run-make/a-b-a-linker-guard/b.rs
@@ -0,0 +1,7 @@
+#![crate_name = "b"]
+
+extern crate a;
+
+fn main() {
+    a::foo(22_u32);
+}
-- 
2.44.0