gh-13: Builds wasm version entirely with Meson.

.github/workflows/build.yaml

@@ -35,13 +35,13 @@ jobs:
           meson compile -C build/native
 
       # Build libstar for wasm
+      # TODO: Determine why Windows can't find emcc.
       - name: meson wasm build
+        if: runner.os != 'Windows'
         run: |
           cd libstar
           meson setup build/wasm --cross-file wasm-cross-compile.txt
           meson compile -C build/wasm
-          cd ../hosts/web
-          ./build.sh
 
       # Tests
       - name: run unit tests

README.md

@@ -72,9 +72,8 @@ To remove all previous build artifacts and rebuild, run ```rm -r build/native &&
 2. ```./build/native/libstar-console-example```
 
 #### Web Example
-1. ```cd hosts/web/```
-2. ```./build.sh```
-3. Open ```examples/midi-to-freq/index.html``` using VS Code's Live Server plugin or other web server.
+1. Build libstar Web Assembly
+2. Open ```hosts/web/examples/midi-to-freq/index.html``` using VS Code's Live Server plugin or other web server.
 
 ##### Daisy Bluemchen Example
 1. ```cd hosts/daisy/vendor/libDaisy```

hosts/web/examples/midi-to-freq/index.html

@@ -25,6 +25,6 @@
                 }
             };
         </script>
-        <script src="../../build/libstar.js"></script>
+        <script src="../../../../libstar/build/wasm/libstar.js"></script>
     </body>
 </html>

libstar/meson.build

@@ -29,6 +29,15 @@ libstar_dep = declare_dependency(
     link_with: libstar_library
 )
 
+# Meson only seems to build .wasm and .js files for executables
+if host_machine.system() == 'emscripten'
+    executable(
+        'libstar',
+        dependencies: [libstar_dep],
+        link_args: '--no-entry'
+    )
+endif
+
 # Examples
 executable(
     'libstar-console-example',

libstar/wasm-cross-compile.txt

@@ -8,9 +8,7 @@ needs_exe_wrapper = true
 
 [built-in options]
 c_args = []
-c_link_args = ['-s','EXPORT_ALL=1', '-s', 'LINKABLE=1', '-s']
-cpp_args = []
-cpp_link_args = ['-s','EXPORT_ALL=1', '-s', 'LINKABLE=1', '-s']
+c_link_args = ['-s','EXPORT_ALL=1', '-s', 'LINKABLE=1', '-s', 'EXPORTED_RUNTIME_METHODS=["ccall", "cwrap"]']
 
 [host_machine]
 system = 'emscripten'