From d716d2a1778d3a8d54fb809d94b3ea5b86d2a5b4 Mon Sep 17 00:00:00 2001
From: Graydon Hoare <graydon@pobox.com>
Date: Mon, 21 Oct 2024 13:05:10 -0700
Subject: [PATCH] Clean RUST_TARGET_DIR when soroban rlibs change

---
 src/Makefile.am | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Makefile.am b/src/Makefile.am
index e6220bfe8b..8b03b632a1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -176,6 +176,7 @@ $(RUST_DEP_TREE_STAMP): $(wildcard rust/soroban/*/Cargo.*) Makefile
 # dep-tree-stamp files and before the stellar-core build, because rustup
 # gets invoked and it is not concurrency-safe.
 $(SOROBAN_LIBS_STAMP): $(wildcard rust/soroban/p*/Cargo.lock) Makefile $(RUST_DEP_TREE_STAMP) $(SRC_RUST_FILES)
+	rm -f $@
 	for proto in $(ALL_SOROBAN_PROTOCOLS) ; \
 	do \
 		FEATURE_FLAGS="" ; \
@@ -215,6 +216,7 @@ $(SOROBAN_LIBS_STAMP): $(wildcard rust/soroban/p*/Cargo.lock) Makefile $(RUST_DE
 # rustc` invocation, along with `-L dependency=...` flags to tell cargo where to
 # find indirect deps of those .rlibs.
 $(LIBRUST_STELLAR_CORE): $(RUST_HOST_DEPFILES) $(SRC_RUST_FILES) Makefile $(SOROBAN_LIBS_STAMP)
+	rm -rf $(abspath $(RUST_TARGET_DIR))
 	CARGO_NET_GIT_FETCH_WITH_CLI=true cargo rustc \
 		--package stellar-core \
 		--$(RUST_PROFILE) \