rust: Add transitive dependencies to ninja rules

In the case r1 -> s1 -> s2 where s1 and s2 are uninstalled C static
libraries, the libs1.a rule does not depend on libs2.a. That means that
r1 rule must depend on both s1 and s2.

4 files changed, 29 insertions, 0 deletions

diff --git a/test cases/rust/21 transitive dependencies/app.rs b/test cases/rust/21 transitive dependencies/app.rs
new file mode 100644
index 0000000..a9802b3
--- /dev/null
+++ b/test cases/rust/21 transitive dependencies/app.rs
@@ -0,0 +1,9 @@
+extern "C" {
+    fn static2() -> i32;
+}
+
+fn main() {
+    unsafe {
+        static2();
+    }
+}
diff --git a/test cases/rust/21 transitive dependencies/meson.build b/test cases/rust/21 transitive dependencies/meson.build
index b786e64..37687fd 100644
--- a/test cases/rust/21 transitive dependencies/meson.build
+++ b/test cases/rust/21 transitive dependencies/meson.build
@@ -27,3 +27,11 @@ exe = executable('footest', 'foo.c',
 test('footest', exe)
 
 subdir('diamond')
+
+# The ninja rule for libstatic2.a does not depend on libstatic1.a because it
+# only need static2.c.o to create the archive. That means that the ninja rule
+# for app must depend on both, otherwise libstatic1.a won't be built and linking
+# will fail.
+static1 = static_library('static1', 'static1.c', build_by_default: false)
+static2 = static_library('static2', 'static2.c', link_with: static1)
+exe = executable('app', 'app.rs', link_with: static2)
diff --git a/test cases/rust/21 transitive dependencies/static1.c b/test cases/rust/21 transitive dependencies/static1.c
new file mode 100644
index 0000000..104618a
--- /dev/null
+++ b/test cases/rust/21 transitive dependencies/static1.c
@@ -0,0 +1,5 @@
+int static1(void);
+
+int static1(void){
+    return 1;
+}
diff --git a/test cases/rust/21 transitive dependencies/static2.c b/test cases/rust/21 transitive dependencies/static2.c
new file mode 100644
index 0000000..6877c04
--- /dev/null
+++ b/test cases/rust/21 transitive dependencies/static2.c
@@ -0,0 +1,7 @@
+int static1(void);
+int static2(void);
+
+int static2(void)
+{
+    return 1 + static1();
+}