linux dynamic linking

build.rs

@@ -18,8 +18,8 @@ fn main() {
     // Get the roc ray target
     let target = RocRaySupportedTarget::default();
 
-    // Find required static libraries in the build cache or root directory
-    println!("cargo:rustc-link-search={}", out_dir.display());
+    // Find required libraries in the build cache
+    println!("cargo:rustc-link-search=native={}", out_dir.display());
 
     // Get the roc app object file (ensure it exists)
     let app = get_roc_app_object(&target);
@@ -123,8 +123,9 @@ fn main() {
             let out_path = out_dir.join("libapp.so");
             std::fs::copy(app_so, out_path).unwrap();
 
+            // TODO is this required? it seems to cause a segfault
             // Add linking flags to make sure our symbols are visible to roc
-            println!("cargo:rustc-link-arg=-Wl,-export_dynamic");
+            // println!("cargo:rustc-link-arg=-Wl,-export_dynamic");
 
             // Link with the app object file
             println!("cargo:rustc-link-lib=dylib=app");
@@ -195,13 +196,14 @@ fn get_roc_app_object(target: &RocRaySupportedTarget) -> AppType {
             }
         }
         RocRaySupportedTarget::Linux => {
-            // Check if the app.o built by roc exists
+            // Check which app built by roc exists
             let app_o = manifest_dir().join("app.o");
-            let app_so = manifest_dir().join("libapp.so");
+            let lib_app_so = manifest_dir().join("libapp.so");
+
             if app_o.exists() {
                 AppType::Static(app_o.to_path_buf())
-            } else if app_so.exists() {
-                AppType::Dynamic(app_so.to_path_buf())
+            } else if lib_app_so.exists() {
+                AppType::Dynamic(lib_app_so.to_path_buf())
             } else {
                 panic!(
                     "app.o or libapp.so file not found -- this should have been generated by roc"

justfile

@@ -35,22 +35,18 @@ dev app="examples/basic-shapes.roc" features="default":
 [linux]
 dev app="examples/basic-shapes.roc" features="default":
     # remove previous builds
-    rm -f app.o
-    rm -f rocray
+    rm -f *.o
+    rm -f *.so
 
     # roc check use 2 as an exit code for warnings
     roc check {{app}} || [ $? -eq 2 ] && exit 0 || exit 1
 
     # build once to ensure we have a dylib to link against
-    roc build --no-link --emit-llvm-ir --output app.o {{app}} || [ $? -eq 2 ] && exit 0 || exit 1
+    roc build --lib --emit-llvm-ir --output libapp.so {{app}} || [ $? -eq 2 ] && exit 0 || exit 1
 
     # build the host app
-    cargo build
-
-    # copy the app to the cwd directory
-    cp target/debug/rocray .
+    cargo run --features {{features}}
 
-    ./rocray
 
 # build and run an executable
 [windows]