| -include ../tools.mk |
| |
| # `llvm-objdump`'s output looks different on windows than on other platforms. |
| # It should be enough to check on Unix platforms, so: |
| # ignore-windows |
| |
| # Staticlibs don't include Rust object files from upstream crates if the same |
| # code was already pulled into the lib via LTO. However, the bug described in |
| # https://github.com/rust-lang/rust/issues/64153 lead to this exclusion not |
| # working properly if the upstream crate was compiled with an explicit filename |
| # (via `-o`). |
| # |
| # This test makes sure that functions defined in the upstream crates do not |
| # appear twice in the final staticlib when listing all the symbols from it. |
| |
| all: |
| $(RUSTC) --crate-type rlib upstream.rs -o $(TMPDIR)/libupstream.rlib -Ccodegen-units=1 |
| $(RUSTC) --crate-type staticlib downstream.rs -Clto -Ccodegen-units=1 -o $(TMPDIR)/libdownstream.a |
| # Dump all the symbols from the staticlib into `syms` |
| "$(LLVM_BIN_DIR)"/llvm-objdump -t $(TMPDIR)/libdownstream.a > $(TMPDIR)/syms |
| # Count the global instances of `issue64153_test_function`. There'll be 2 |
| # if the `upstream` object file got erronously included twice. |
| # The line we are testing for with the regex looks something like: |
| # 0000000000000000 g F .text.issue64153_test_function 00000023 issue64153_test_function |
| grep -c -e "[[:space:]]g[[:space:]]*F[[:space:]].*issue64153_test_function" $(TMPDIR)/syms > $(TMPDIR)/count |
| [ "$$(cat $(TMPDIR)/count)" -eq "1" ] |
