Add option to build rust api without linking to core

2 files changed, 30 insertions, 4 deletions

diff --git a/rust/binaryninjacore-sys/Cargo.toml b/rust/binaryninjacore-sys/Cargo.toml
index bfd49a41..d4faaec8 100644
--- a/rust/binaryninjacore-sys/Cargo.toml
+++ b/rust/binaryninjacore-sys/Cargo.toml
@@ -7,8 +7,15 @@ edition = "2021"
 links = "binaryninjacore"
 license = "Apache-2.0"
 
+[features]
+default = ["core"]
+# If disabled, a stub binaryninjacore library will be generated and linked.
+# This feature should only be disabled for shared libraries that will later be loaded in the same process as the real binaryninjacore.
+core = []
+
 [build-dependencies]
 bindgen = "0.71.1"
 # TODO: Remove this once bindgen correctly pins the version.
 # proc-macro2 v1.0.79 does not have https://docs.rs/proc-macro2/1.0.80/proc_macro2/struct.Literal.html#method.c_string
-proc-macro2 = ">=1.0.80"
\ No newline at end of file
+proc-macro2 = ">=1.0.80"
+cmake = "0.1"
diff --git a/rust/binaryninjacore-sys/build.rs b/rust/binaryninjacore-sys/build.rs
index 579276a6..672615da 100644
--- a/rust/binaryninjacore-sys/build.rs
+++ b/rust/binaryninjacore-sys/build.rs
@@ -41,6 +41,22 @@ fn link_path() -> PathBuf {
         })
 }
 
+// Generate and compile stub shared library and return the path to the folder containing the built stub library
+fn generate_stubs() -> PathBuf {
+    let manifest_dir = std::env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set");
+
+    let api_base_path = std::path::PathBuf::from(manifest_dir)
+        .join("../../")
+        .canonicalize()
+        .unwrap();
+
+    let stubs_path = api_base_path.join("stubs");
+    cmake::Config::new(stubs_path)
+        .generator("Ninja")
+        .build()
+        .join("build")
+}
+
 fn main() {
     println!("cargo:rerun-if-env-changed=BINARYNINJADIR");
     println!("cargo:rerun-if-changed=../../binaryninjacore.h");
@@ -48,9 +64,12 @@ fn main() {
     //Cargo's output directory
     let out_dir = env::var("OUT_DIR").unwrap();
 
-    let link_path = env::var("BINARYNINJADIR")
-        .map(PathBuf::from)
-        .unwrap_or_else(|_| link_path());
+    let link_path = match env::var("CARGO_FEATURE_CORE") {
+        Ok(_) => env::var("BINARYNINJADIR")
+            .map(PathBuf::from)
+            .unwrap_or_else(|_| link_path()),
+        Err(_) => generate_stubs(),
+    };
 
     // Linux builds of binaryninja ship with libbinaryninjacore.so.1 in the
     // application folder and no symlink. The linker will attempt to link with