Use dynamic linking to avoid unnecessary build

Author: Pandapip1

.gitmodules

@@ -52,6 +52,7 @@ name = "cargo-build_sk_rs"
 
 [build-dependencies]
 cmake = "0.1.54"
+system-deps = "2.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [dependencies]
@@ -94,6 +95,9 @@ name = "main_tests"
 path = "tests/main_tests.rs"
 harness = false
 
+[package.metadata.system-deps]
+StereoKitC = "0.3.11"
+
 [package.metadata.android]
 package = "com.stereokit.rust_binding.demos"
 build_targets = ["aarch64-linux-android"]

Cargo.toml

@@ -76,6 +76,8 @@ bitflags::bitflags! {
         const Stability = 2;
     }
 }
+
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn anchor_find(asset_id_utf8: *const c_char) -> AnchorT;
     pub fn anchor_create(pose: Pose) -> AnchorT;

StereoKit

@@ -71,6 +71,7 @@ pub struct _FontT {
 /// StereoKit ffi type.
 pub type FontT = *mut _FontT;
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn font_find(id: *const c_char) -> FontT;
     pub fn font_create(file_utf8: *const c_char) -> FontT;

build.rs

@@ -76,6 +76,7 @@ pub enum DefaultInteractors {
     None = 1,
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     // Interactor functions
     pub fn interactor_create(

src/anchor.rs

@@ -130,6 +130,7 @@ pub struct _MaterialT {
 /// StereoKit ffi type.
 pub type MaterialT = *mut _MaterialT;
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn material_find(id: *const c_char) -> MaterialT;
     pub fn material_create(shader: ShaderT) -> MaterialT;
@@ -1472,6 +1473,7 @@ pub struct ParamInfos<'a> {
     index: i32,
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn material_set_float(material: MaterialT, name: *const c_char, value: f32);
     pub fn material_set_vector2(material: MaterialT, name: *const c_char, value: Vec2);
@@ -2363,6 +2365,7 @@ impl ParamInfo {
     }
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn material_buffer_create(size: i32) -> MaterialBufferT;
     pub fn material_buffer_addref(buffer: MaterialBufferT);

src/font.rs

@@ -955,6 +955,7 @@ impl PartialEq for Vec3 {
     }
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn vec3_cross(a: *const Vec3, b: *const Vec3) -> Vec3;
 }
@@ -2569,6 +2570,7 @@ impl PartialEq for Quat {
     }
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn quat_difference(a: *const Quat, b: *const Quat) -> Quat;
     pub fn quat_lookat(from: *const Vec3, at: *const Vec3) -> Quat;
@@ -3225,6 +3227,7 @@ impl PartialEq for Matrix {
     }
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn pose_matrix_out(pose: *const Pose, out_result: *mut Matrix, scale: Vec3);
     pub fn matrix_inverse(a: *const Matrix, out_Matrix: *mut Matrix);
@@ -4718,6 +4721,7 @@ impl AsRef<Bounds> for Bounds {
     }
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn bounds_ray_intersect(bounds: Bounds, ray: Ray, out_pt: *mut Vec3) -> Bool32T;
     pub fn bounds_point_contains(bounds: Bounds, pt: Vec3) -> Bool32T;
@@ -5328,6 +5332,7 @@ impl PartialEq for Plane {
     }
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn plane_from_points(p1: Vec3, p2: Vec3, p3: Vec3) -> Plane;
     pub fn plane_from_ray(ray: Ray) -> Plane;
@@ -5809,6 +5814,7 @@ impl AsRef<Sphere> for Sphere {
     }
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn sphere_ray_intersect(sphere: Sphere, ray: Ray, out_pt: *mut Vec3) -> Bool32T;
     pub fn sphere_point_contains(sphere: Sphere, pt: Vec3) -> Bool32T;
@@ -5976,6 +5982,7 @@ pub struct Ray {
     pub direction: Vec3,
 }
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn ray_intersect_plane(ray: Ray, plane_pt: Vec3, plane_normal: Vec3, out_t: *mut f32) -> Bool32T;
     pub fn ray_from_mouse(screen_pixel_pos: Vec2, out_ray: *mut Ray) -> Bool32T;

src/interactor.rs

@@ -166,6 +166,7 @@ pub type MeshT = *mut _MeshT;
 /// StereoKit ffi type.
 pub type VindT = u32;
 
+#[link(name = "StereoKitC")]
 unsafe extern "C" {
     pub fn mesh_find(name: *const c_char) -> MeshT;
     pub fn mesh_create() -> MeshT;