Add ninja build

.github/scripts/python.sh

@@ -45,6 +45,7 @@ function install_dependencies()
 
 function build()
 {
+  export CMAKE_GENERATOR=Ninja
   BUILD_PYBIND="ON"
   cmake $GITHUB_WORKSPACE \
       -B build \

.github/scripts/unix.sh

@@ -37,6 +37,7 @@ function configure()
 
   # GTSAM_BUILD_WITH_MARCH_NATIVE=OFF: to avoid crashes in builder VMs
   # CMAKE_CXX_FLAGS="-w": Suppress warnings to avoid IO latency in CI logs
+  export CMAKE_GENERATOR=Ninja
   cmake $GITHUB_WORKSPACE \
       -B build \
       -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE:-Debug} \

.github/workflows/build-linux.yml

@@ -73,7 +73,7 @@ jobs:
           fi
 
           sudo apt-get -y update
-          sudo apt-get -y install cmake build-essential pkg-config libpython3-dev python3-numpy libicu-dev
+          sudo apt-get -y install cmake build-essential pkg-config libpython3-dev python3-numpy libicu-dev ninja-build
 
           if [ "${{ matrix.compiler }}" = "gcc" ]; then
             sudo apt-get install -y g++-${{ matrix.version }} g++-${{ matrix.version }}-multilib

.github/workflows/build-python.yml

@@ -75,7 +75,7 @@ jobs:
           fi
 
           sudo apt-get -y update
-          sudo apt-get -y install cmake build-essential pkg-config libpython3-dev python3-numpy libboost-all-dev
+          sudo apt-get -y install cmake build-essential pkg-config libpython3-dev python3-numpy libboost-all-dev ninja-build
 
           if [ "${{ matrix.compiler }}" = "gcc" ]; then
             sudo apt-get install -y g++-${{ matrix.version }} g++-${{ matrix.version }}-multilib

.github/workflows/build-special.yml

@@ -103,7 +103,7 @@ jobs:
             sudo add-apt-repository "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy main"
           fi
 
-          sudo apt-get -y install cmake build-essential pkg-config libpython3-dev python3-numpy libicu-dev
+          sudo apt-get -y install cmake build-essential pkg-config libpython3-dev python3-numpy libicu-dev ninja-build
 
           if [ "${{ matrix.compiler }}" = "gcc" ]; then
             sudo apt-get install -y g++-${{ matrix.version }} g++-${{ matrix.version }}-multilib

.github/workflows/build-windows.yml

@@ -100,9 +100,17 @@ jobs:
           arch: x${{ matrix.platform }}
 
       - name: Configuration
+        shell: bash
         run: |
+          export CMAKE_GENERATOR=Ninja 
           cmake -E remove_directory build
-          cmake -G Ninja -B build -S . -DGTSAM_BUILD_EXAMPLES_ALWAYS=OFF -DGTSAM_ALLOW_DEPRECATED_SINCE_V43=OFF -DBOOST_ROOT="${env:BOOST_ROOT}" -DBOOST_INCLUDEDIR="${env:BOOST_ROOT}\boost\include" -DBOOST_LIBRARYDIR="${env:BOOST_ROOT}\lib"
+          cmake -B build \
+                -S . \
+                -DGTSAM_BUILD_EXAMPLES_ALWAYS=OFF \
+                -DGTSAM_ALLOW_DEPRECATED_SINCE_V43=OFF \
+                -DBOOST_ROOT="${BOOST_ROOT}" \
+                -DBOOST_INCLUDEDIR="${BOOST_ROOT}\boost\include" \
+                -DBOOST_LIBRARYDIR="${BOOST_ROOT}\lib"
 
       - name: Build
         shell: bash