Subject: [PATCH v2 11/15] rust: add a build.rs script for tests

From: "brian m. carlson" <[email-masked]>
Date: Mon, 17 Nov 2025 22:16:17 +0000

Cargo uses the build.rs script to determine how to compile and link a
binary.  The only binary we're generating, however, is for our tests,
but in a future commit, we're going to link against libgit.a for some
functionality and we'll need to make sure the test binaries are
complete.

Add a build.rs file for this case and specify the files we're going to
be linking against.  Because we cannot specify different dependencies
when building our static library versus our tests, update the Makefile
to specify these dependencies for our static library to avoid race
conditions during build.

Signed-off-by: brian m. carlson <[email-masked]>
---
 Makefile |  2 +-
 build.rs | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 build.rs

diff --git a/Makefile b/Makefile
index e1d0ae3691..4211d7622a 100644
--- a/Makefile
+++ b/Makefile
@@ -2964,7 +2964,7 @@ scalar$X: scalar.o GIT-LDFLAGS $(GITLIBS)
 $(LIB_FILE): $(LIB_OBJS)
 	$(QUIET_AR)$(RM) $@ && $(AR) $(ARFLAGS) $@ $^
 
-$(RUST_LIB): Cargo.toml $(RUST_SOURCES)
+$(RUST_LIB): Cargo.toml $(RUST_SOURCES) $(LIB_FILE)
 	$(QUIET_CARGO)cargo build $(CARGO_ARGS)
 
 .PHONY: rust
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000000..3724b3a930
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,17 @@
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation: version 2 of the License, dated June 1991.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, see <https://www.gnu.org/licenses/>.
+
+fn main() {
+    println!("cargo:rustc-link-search=.");
+    println!("cargo:rustc-link-lib=git");
+    println!("cargo:rustc-link-lib=z");
+}