Enable code coverage

Author: cschreib

.github/workflows/cmake.yml

@@ -5,14 +5,15 @@ on: [push, pull_request]
 env:
   EM_VERSION: 2.0.16
   EM_CACHE_FOLDER: 'emsdk-cache'
+  CODECOV_TOKEN: '99959e57-0b92-48b4-bf55-559d43d41b58'
 
 jobs:
   build:
     strategy:
       fail-fast: false
       matrix:
         platform:
-        - { name: Ubuntu GCC,   os: ubuntu-latest,  compiler: g++,     arch: "64", cmakepp: "",        flags: ""}
+        - { name: Ubuntu GCC,   os: ubuntu-latest,  compiler: g++,     arch: "64", cmakepp: "",        flags: "-DCMAKE_CXX_FLAGS=--coverage"}
         - { name: Ubuntu Clang, os: ubuntu-latest,  compiler: clang++, arch: "64", cmakepp: "",        flags: ""}
         - { name: Windows 32,   os: windows-latest, compiler: vs2019,  arch: "32", cmakepp: "",        flags: "-A Win32"}
         - { name: Windows 64,   os: windows-latest, compiler: vs2019,  arch: "64", cmakepp: "",        flags: "-A x64"}
@@ -68,3 +69,6 @@ jobs:
       working-directory: ${{github.workspace}}/build
       run: ctest --output-on-failure
 
+    - name: Compute Code Coverage
+      if: runner.os == 'Linux' && ${{matrix.platform.compiler}} == 'g++' && ${{matrix.build-type}} == 'Debug'
+      run: gcov ${{github.workspace}}/build/tests/CMakeFiles/oup_tests.dir/runtime_tests.cpp.gcda && bash <(curl -s https://codecov.io/bash)