Add cargo-c to metrics

.github/workflows/ci-build.yml

@@ -1,10 +1,10 @@
 name: ci
 
 on:
-  pull_request:
+  push:
     branches:
       - master
-  push:
+  pull_request:
     branches:
       - master
 
@@ -37,6 +37,28 @@ jobs:
         args: --all-features --tests --benches
         name: lint
 
+  cargo-c:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install cargo-c
+      run: |
+        cargo install cargo-c
+    - name: Run cargo-c
+      run: |
+        cargo cinstall --all-features \
+                       --prefix=$HOME/av_metrics_deploy
+    - name: Build cargo-c tests
+      run: |
+        export PKG_CONFIG_PATH=$HOME/av_metrics_deploy/lib/pkgconfig
+        cd av_metrics/c-example
+        gcc test.c -o test `pkg-config --static --cflags --libs av_metrics`
+    - name: Run tests
+      run: |
+        export LD_LIBRARY_PATH=$HOME/av_metrics_deploy/lib/
+        cd av_metrics/c-example
+        ./test
+
   build:
     strategy:
       matrix: