ci: add OS X GCC builds after recent SoapySDR CMake fix

.github/workflows/ci.yml

@@ -77,6 +77,21 @@ jobs:
             matrix:
                 build_type: [Release, Debug]
                 config:
+                    - cc: gcc-9
+                      cxx: g++-9
+                      os: macos-11
+
+                    - cc: gcc-10
+                      cxx: g++-10
+                      os: macos-11
+
+                    - cc: gcc-11
+                      cxx: g++-11
+                      os: macos-11
+
+                    - cc: clang
+                      cxx: clang++
+                      os: macos-11
                     - cc: clang
                       cxx: clang++
                       os: macos-11
@@ -94,7 +109,14 @@ jobs:
           - uses: actions/checkout@v2
           - name: Install dependencies
             run: |
-                brew install soapysdr
+                # Build SoapySDR that supports OS X GCC modules
+                git clone https://github.com/pothosware/SoapySDR
+                cd SoapySDR
+                git checkout f8d57652d12f9d212f373a81e493eba1a0b058c5
+                mkdir build
+                cd build
+                cmake -DCMAKE_INSTALL_PREFIX=${INSTALL_PREFIX} -DCMAKE_BUILD_TYPE=${{matrix.build_type}} ..
+                sudo make install
           - name: Build SoapyRemote
             run: |
                 mkdir ${{github.workspace}}/build