ci: Fix ccache env variable and use Ninja in Linux/MacOS build

.github/workflows/macos-linux-conda.yml

@@ -55,25 +55,24 @@ jobs:
         mkdir build
         cd build
 
-        export CXXFLAGS=${{ matrix.cxx_options }}
         cmake .. \
+          -G "Ninja" \
           -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
           -DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX \
           -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
+          -DCMAKE_CXX_FLAGS=${{ matrix.cxx_options }} \
           -DPYTHON_EXECUTABLE=$(which python3) \
           -DGENERATE_PYTHON_STUBS=ON \
           -DHPP_FCL_HAS_QHULL=ON
-        make -j2
-        make build_tests
-        export CTEST_OUTPUT_ON_FAILURE=1
-        make test
-        make install
+        cmake --build . -j2
+        ctest --output-on-failure
+        cmake --install .
 
     - name: Uninstall hpp-fcl
       shell: bash -el {0}
       run: |
         cd build
-        make uninstall
+        cmake --build . --target uninstall
 
   check:
     if: always()

.github/workflows/windows-conda-clang.yml

@@ -5,10 +5,10 @@ jobs:
   build:
     runs-on: ${{ matrix.os }}
     env:
-      ccache_basedir: "${github_workspace}"
-      ccache_dir: "${github_workspace}/.ccache"
-      ccache_compress: true
-      ccache_compresslevel: 6
+      CCACHE_BASEDIR: "${GITHUB_WORKSPACE}"
+      CCACHE_DIR: "${GITHUB_WORKSPACE}/.ccache"
+      CCACHE_COMPRESS: true
+      CCACHE_COMPRESSLEVEL: 6
 
     strategy:
       fail-fast: false
@@ -37,14 +37,12 @@ jobs:
       with:
         activate-environment: fcl
         auto-update-conda: true
-        environment-file: .github/workflows/conda/conda-env.yml
+        environment-file: .github/workflows/conda/conda-env-windows.yml
         python-version: "3.10"
         auto-activate-base: false
 
     - name: Build FCL
       shell: cmd /C CALL {0}
-      env:
-        ACTIONS_ALLOW_UNSECURE_COMMANDS: 'true'
       run: |
         call "%programfiles(x86)%\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" amd64
 

.github/workflows/windows-conda-v142.yml

@@ -22,7 +22,7 @@ jobs:
         ACTIONS_ALLOW_UNSECURE_COMMANDS: 'true'
       with:
         activate-environment: fcl
-        environment-file: .github/workflows/conda/conda-env.yml
+        environment-file: .github/workflows/conda/conda-env-windows.yml
         python-version: "3.10"
     - name: Install cmake and update conda
       run: |