Add "make" targets to make it easy to run the rust selftests under gdb
and under valgrind via:
  make selftest-rust-gdb
and
  make selftest-rust-valgrind
respectively, similar to analogous "make" targets in the C and C++
frontends.

Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu.

OK for trunk?

gcc/rust/ChangeLog:
        * Make-lang.in (selftest-rust-gdb): New.
        (selftest-rust-valgrind): New.

Signed-off-by: David Malcolm <dmalc...@redhat.com>
---
 gcc/rust/Make-lang.in | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/gcc/rust/Make-lang.in b/gcc/rust/Make-lang.in
index 681ac7b3fee..76015b3426b 100644
--- a/gcc/rust/Make-lang.in
+++ b/gcc/rust/Make-lang.in
@@ -275,6 +275,18 @@ s-selftest-rust: $(RUST_SELFTEST_DEPS)
        $(GCC_FOR_TARGET) $(RUST_SELFTEST_FLAGS)
        $(STAMP) $@
 
+# Convenience methods for running rust selftests under gdb:
+.PHONY: selftest-rust-gdb
+selftest-rust-gdb: $(RUST_SELFTEST_DEPS)
+       $(GCC_FOR_TARGET) $(RUST_SELFTEST_FLAGS) \
+         -wrapper gdb,--args
+
+# Convenience methods for running rust selftests under valgrind:
+.PHONY: selftest-rust-valgrind
+selftest-rust-valgrind: $(RUST_SELFTEST_DEPS)
+       $(GCC_FOR_TARGET) $(RUST_SELFTEST_FLAGS) \
+         -wrapper valgrind,--leak-check=full
+
 # Install info documentation for the front end, if it is present in the source 
directory. This target
 # should have dependencies on info files that should be installed.
 rust.install-info:
-- 
2.26.3

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