1 files changed, 32 insertions, 0 deletions
diff --git a/tests/run-make/cross-lang-lto-upstream-rlibs/Makefile b/tests/run-make/cross-lang-lto-upstream-rlibs/Makefile
new file mode 100644
index 000000000..6f1caa31a
--- /dev/null
+++ b/tests/run-make/cross-lang-lto-upstream-rlibs/Makefile
@@ -0,0 +1,32 @@
+include ../tools.mk
+
+# ignore windows due to libLLVM being present in PATH and the PATH and library path being the same
+# (so fixing it is harder). See #57765 for context
+ifndef IS_WINDOWS
+
+# This test makes sure that we don't loose upstream object files when compiling
+# staticlibs with -C linker-plugin-lto
+
+all: staticlib.rs upstream.rs
+	$(RUSTC) upstream.rs -C linker-plugin-lto -Ccodegen-units=1
+
+	# Check No LTO
+	$(RUSTC) staticlib.rs -C linker-plugin-lto -Ccodegen-units=1 -L. -o $(TMPDIR)/staticlib.a
+	(cd $(TMPDIR); "$(LLVM_BIN_DIR)"/llvm-ar x ./staticlib.a)
+	# Make sure the upstream object file was included
+	ls $(TMPDIR)/upstream.*.rcgu.o
+
+	# Cleanup
+	rm $(TMPDIR)/*
+
+	# Check ThinLTO
+	$(RUSTC) upstream.rs -C linker-plugin-lto -Ccodegen-units=1 -Clto=thin
+	$(RUSTC) staticlib.rs -C linker-plugin-lto -Ccodegen-units=1 -Clto=thin -L. -o $(TMPDIR)/staticlib.a
+	(cd $(TMPDIR); "$(LLVM_BIN_DIR)"/llvm-ar x ./staticlib.a)
+	ls $(TMPDIR)/upstream.*.rcgu.o
+
+else
+
+all:
+
+endif