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-rw-r--r--src/test/run-make-fulldeps/a-b-a-linker-guard/Makefile15
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diff --git a/src/test/run-make-fulldeps/a-b-a-linker-guard/Makefile b/src/test/run-make-fulldeps/a-b-a-linker-guard/Makefile
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index 000000000..4a9b3d709
--- /dev/null
+++ b/src/test/run-make-fulldeps/a-b-a-linker-guard/Makefile
@@ -0,0 +1,15 @@
+-include ../tools.mk
+
+# Test that if we build `b` against a version of `a` that has one set
+# of types, it will not run with a dylib that has a different set of
+# types.
+
+# NOTE(eddyb) this test only works with the `legacy` mangling,
+# and will probably get removed once `legacy` is gone.
+
+all:
+ $(RUSTC) a.rs --cfg x -C prefer-dynamic -Z unstable-options -C symbol-mangling-version=legacy
+ $(RUSTC) b.rs -C prefer-dynamic -Z unstable-options -C symbol-mangling-version=legacy
+ $(call RUN,b)
+ $(RUSTC) a.rs --cfg y -C prefer-dynamic -Z unstable-options -C symbol-mangling-version=legacy
+ $(call FAIL,b)