diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
new file mode 100644
index 0000000..cf2a447
--- /dev/null
+++ b/.github/workflows/android.yml
@@ -0,0 +1,166 @@
+name: Android
+
+on: [push, pull_request]
+
+jobs:
+  build-android:
+    name: NDK-${{matrix.abi}}-${{matrix.build_type}}-${{matrix.lib}}
+    runs-on: ${{matrix.os}}
+    defaults:
+      run:
+        shell: bash -e -o pipefail {0}
+    env:
+      CCACHE_DIR: ${{github.workspace}}/ccache
+      CMAKE_GENERATOR: Ninja
+      DEBIAN_FRONTEND: noninteractive
+    strategy:
+      fail-fast: true
+      matrix:
+        os:
+          - ubuntu-20.04
+        abi:
+          - arm64-v8a
+          - armeabi-v7a
+          - x86
+          - x86_64
+        build_type:
+          - Release
+        lib:
+          - shared
+          - static
+        android_api_level:
+          - '28'
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Ninja
+        uses: ashutoshvarma/setup-ninja@master
+        with:
+          version: 1.10.0
+
+      - name: Setup Dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            ccache \
+            ninja-build
+
+      - name: Cache Eigen
+        id: cache-eigen
+        uses: actions/cache@v2
+        with:
+          path: eigen/
+          key: NDK-${{matrix.os}}-eigen-3.4.0-${{matrix.abi}}
+
+      - name: Download Eigen
+        if: steps.cache-eigen.outputs.cache-hit != 'true'
+        run: |
+          wget https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.zip
+          unzip eigen-3.4.0.zip
+
+      - name: Setup Eigen
+        if: steps.cache-eigen.outputs.cache-hit != 'true'
+        run: |
+          cmake -S eigen-3.4.0 -B build-eigen \
+                -DBUILD_TESTING=OFF \
+                -DCMAKE_ANDROID_API=${{matrix.android_api_level}} \
+                -DCMAKE_ANDROID_ARCH_ABI=${{matrix.abi}} \
+                -DCMAKE_ANDROID_STL_TYPE=c++_shared \
+                -DCMAKE_Fortran_COMPILER= \
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/eigen \
+                -DCMAKE_SYSTEM_NAME=Android \
+                -DEIGEN_BUILD_DOC=OFF
+          cmake --build build-eigen \
+                --config ${{matrix.build_type}} \
+                --target install
+
+      - name: Cache gflags
+        id: cache-gflags
+        uses: actions/cache@v2
+        with:
+          path: gflags/
+          key: NDK-${{matrix.os}}-gflags-2.2.2-${{matrix.abi}}-${{matrix.build_type}}-${{matrix.lib}}
+
+      - name: Download gflags
+        if: steps.cache-gflags.outputs.cache-hit != 'true'
+        run: |
+          wget https://github.com/gflags/gflags/archive/refs/tags/v2.2.2.zip
+          unzip v2.2.2.zip
+
+      - name: Setup gflags
+        if: steps.cache-gflags.outputs.cache-hit != 'true'
+        run: |
+          cmake -S gflags-2.2.2 -B build-gflags \
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} \
+                -DBUILD_TESTING=OFF \
+                -DCMAKE_ANDROID_API=${{matrix.android_api_level}} \
+                -DCMAKE_ANDROID_ARCH_ABI=${{matrix.abi}} \
+                -DCMAKE_ANDROID_STL_TYPE=c++_shared \
+                -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/gflags \
+                -DCMAKE_SYSTEM_NAME=Android
+          cmake --build build-gflags \
+                --config ${{matrix.build_type}} \
+                --target install
+
+      - name: Cache glog
+        id: cache-glog
+        uses: actions/cache@v2
+        with:
+          path: glog/
+          key: NDK-${{matrix.os}}-glog-0.5-${{matrix.abi}}-${{matrix.build_type}}-${{matrix.lib}}
+
+      - name: Download glog
+        if: steps.cache-glog.outputs.cache-hit != 'true'
+        run: |
+          wget https://github.com/google/glog/archive/refs/tags/v0.5.0.zip
+          unzip v0.5.0.zip
+
+      - name: Setup glog
+        if: steps.cache-glog.outputs.cache-hit != 'true'
+        run: |
+          cmake -S glog-0.5.0 -B build-glog \
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} \
+                -DBUILD_TESTING=OFF \
+                -DCMAKE_ANDROID_API=${{matrix.android_api_level}} \
+                -DCMAKE_ANDROID_ARCH_ABI=${{matrix.abi}} \
+                -DCMAKE_ANDROID_STL_TYPE=c++_shared \
+                -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+                -DCMAKE_FIND_ROOT_PATH=${{github.workspace}}/gflags \
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/glog \
+                -DCMAKE_SYSTEM_NAME=Android
+          cmake --build build-glog \
+                --config ${{matrix.build_type}} \
+                --target install
+
+      - name: Cache Build
+        id: cache-build
+        uses: actions/cache@v2
+        with:
+          path: ${{env.CCACHE_DIR}}
+          key: NDK-${{matrix.os}}-ccache-${{matrix.abi}}-${{matrix.build_type}}-${{matrix.lib}}-${{github.run_id}}
+          restore-keys: NDK-${{matrix.os}}-ccache-${{matrix.abi}}-${{matrix.build_type}}-${{matrix.lib}}-
+
+      - name: Setup Environment
+        if: matrix.build_type == 'Release'
+        run: |
+          echo 'CXXFLAGS=-flto' >> $GITHUB_ENV
+
+      - name: Configure
+        run: |
+          cmake -S . -B build_${{matrix.abi}} \
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} \
+                -DCMAKE_ANDROID_API=${{matrix.android_api_level}} \
+                -DCMAKE_ANDROID_ARCH_ABI=${{matrix.abi}} \
+                -DCMAKE_ANDROID_STL_TYPE=c++_shared \
+                -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+                -DCMAKE_C_COMPILER_LAUNCHER=$(which ccache) \
+                -DCMAKE_CXX_COMPILER_LAUNCHER=$(which ccache) \
+                -DCMAKE_FIND_ROOT_PATH="${{github.workspace}}/eigen;${{github.workspace}}/gflags;${{github.workspace}}/glog" \
+                -DCMAKE_SYSTEM_NAME=Android
+
+      - name: Build
+        run: |
+          cmake --build build_${{matrix.abi}} \
+                --config ${{matrix.build_type}}
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
new file mode 100644
index 0000000..75307b3
--- /dev/null
+++ b/.github/workflows/linux.yml
@@ -0,0 +1,90 @@
+name: Linux
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: ${{matrix.os}}-${{matrix.build_type}}-${{matrix.lib}}-${{matrix.threading_model}}
+    runs-on: ${{matrix.os}}
+    defaults:
+      run:
+        shell: bash -e -o pipefail {0}
+    env:
+      CCACHE_DIR: ${{github.workspace}}/ccache
+      CMAKE_GENERATOR: Ninja
+      DEBIAN_FRONTEND: noninteractive
+    strategy:
+      fail-fast: true
+      matrix:
+        os:
+          - ubuntu-18.04
+          - ubuntu-20.04
+        build_type:
+          - Release
+        lib:
+          - shared
+          - static
+        threading_model:
+          - CXX_THREADS
+          - NO_THREADS
+          - OPENMP
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            build-essential \
+            ccache \
+            cmake \
+            libbenchmark-dev \
+            libblas-dev \
+            libeigen3-dev \
+            libgflags-dev \
+            libgoogle-glog-dev \
+            liblapack-dev \
+            libsuitesparse-dev \
+            ninja-build
+
+      - name: Cache Build
+        id: cache-build
+        uses: actions/cache@v2
+        with:
+          path: ${{env.CCACHE_DIR}}
+          key: ${{matrix.os}}-ccache-${{matrix.build_type}}-${{matrix.lib}}-${{matrix.threading_model}}-${{github.run_id}}
+          restore-keys: ${{matrix.os}}-ccache-${{matrix.build_type}}-${{matrix.lib}}-${{matrix.threading_model}}-
+
+      - name: Setup Environment
+        if: matrix.build_type == 'Release'
+        run: |
+          echo 'CXXFLAGS=-flto' >> $GITHUB_ENV
+
+      - name: Configure
+        run: |
+          cmake -S . -B build_${{matrix.build_type}} \
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} \
+                -DCERES_THREADING_MODEL=${{matrix.threading_model}} \
+                -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+                -DCMAKE_C_COMPILER_LAUNCHER=$(which ccache) \
+                -DCMAKE_CXX_COMPILER_LAUNCHER=$(which ccache) \
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/install
+
+      - name: Build
+        run: |
+          cmake --build build_${{matrix.build_type}} \
+                --config ${{matrix.build_type}}
+
+      - name: Test
+        run: |
+          ctest --test-dir build_${{matrix.build_type}} \
+                --config ${{matrix.build_type}} \
+                --output-on-failure \
+                -j$(nproc)
+
+      - name: Install
+        run: |
+          cmake --build build_${{matrix.build_type}}/ \
+                --config ${{matrix.build_type}} \
+                --target install
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
new file mode 100644
index 0000000..431ad6c
--- /dev/null
+++ b/.github/workflows/macos.yml
@@ -0,0 +1,107 @@
+name: macOS
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: ${{matrix.os}}-${{matrix.build_type}}-${{matrix.lib}}-${{matrix.target}}
+    runs-on: ${{matrix.os}}
+    defaults:
+      run:
+        shell: bash -e -o pipefail {0}
+    env:
+      CCACHE_DIR: ${{github.workspace}}/ccache
+      CMAKE_GENERATOR: Ninja
+    strategy:
+      fail-fast: true
+      matrix:
+        os:
+          - macos-11
+        build_type:
+          - Release
+        lib:
+          - shared
+          - static
+        target:
+          - host
+          - ios
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Dependencies (iOS)
+        if: matrix.target == 'ios'
+        run: |
+          brew update
+          brew install \
+            ccache \
+            eigen \
+            ninja
+
+      - name: Setup Dependencies (Host)
+        if: matrix.target == 'host'
+        run: |
+          brew update
+          brew install \
+            ccache \
+            eigen \
+            gflags \
+            glog \
+            google-benchmark \
+            ninja \
+            suite-sparse
+
+      - name: Cache Build
+        id: cache-build
+        uses: actions/cache@v2
+        with:
+          path: ${{env.CCACHE_DIR}}
+          key: ${{matrix.os}}-ccache-${{matrix.build_type}}-${{matrix.lib}}-${{matrix.target}}-${{github.run_id}}
+          restore-keys: ${{matrix.os}}-ccache-${{matrix.build_type}}-${{matrix.lib}}-${{matrix.target}}-
+
+      - name: Setup Environment
+        if: matrix.build_type == 'Release'
+        run: |
+          echo 'CXXFLAGS=-flto' >> $GITHUB_ENV
+
+      - name: Configure (iOS)
+        if: matrix.target == 'ios'
+        run: |
+          cmake -S . -B build_${{matrix.build_type}} \
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} \
+                -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+                -DCMAKE_C_COMPILER_LAUNCHER=$(which ccache) \
+                -DCMAKE_CXX_COMPILER_LAUNCHER=$(which ccache) \
+                -DCMAKE_TOOLCHAIN_FILE=${{github.workspace}}/cmake/iOS.cmake \
+                -DEigen3_DIR=/usr/local/share/eigen3/cmake \
+                -DIOS_PLATFORM=OS \
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/install
+
+      - name: Configure (Host)
+        if: matrix.target == 'host'
+        run: |
+          cmake -S . -B build_${{matrix.build_type}} \
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} \
+                -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+                -DCMAKE_C_COMPILER_LAUNCHER=$(which ccache) \
+                -DCMAKE_CXX_COMPILER_LAUNCHER=$(which ccache) \
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/install
+
+      - name: Build
+        run: |
+          cmake --build build_${{matrix.build_type}} \
+                --config ${{matrix.build_type}}
+
+      - name: Test
+        if: matrix.target == 'host'
+        run: |
+          ctest --test-dir build_${{matrix.build_type}} \
+                --config ${{matrix.build_type}} \
+                --output-on-failure \
+                -j$(sysctl -n hw.ncpu)
+
+      - name: Install
+        run: |
+          cmake --build build_${{matrix.build_type}}/ \
+                --config ${{matrix.build_type}} \
+                --target install
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
new file mode 100644
index 0000000..b8ff056
--- /dev/null
+++ b/.github/workflows/windows.yml
@@ -0,0 +1,167 @@
+name: Windows
+
+on: [push, pull_request]
+
+jobs:
+  build-msvc:
+    name: ${{matrix.msvc}}-${{matrix.arch}}-${{matrix.build_type}}-${{matrix.lib}}
+    runs-on: ${{matrix.os}}
+    defaults:
+      run:
+        shell: powershell
+    env:
+      CL: /MP
+      CMAKE_GENERATOR: ${{matrix.generator}}
+      CMAKE_GENERATOR_PLATFORM: ${{matrix.arch}}
+    strategy:
+      fail-fast: true
+      matrix:
+        arch:
+          - x64
+        build_type:
+          - Release
+        msvc:
+          - VS-16-2019
+          - VS-17-2022
+        lib:
+          - shared
+        include:
+          - msvc: VS-16-2019
+            os: windows-2019
+            generator: 'Visual Studio 16 2019'
+            marker: vc16
+          - msvc: VS-17-2022
+            os: windows-2022
+            generator: 'Visual Studio 17 2022'
+            marker: vc17
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache gflags
+        id: cache-gflags
+        uses: actions/cache@v2
+        with:
+          path: gflags/
+          key: ${{matrix.msvc}}-gflags-2.2.2-${{matrix.arch}}-${{matrix.build_type}}-${{matrix.lib}}
+
+      - name: Download gflags
+        if: steps.cache-gflags.outputs.cache-hit != 'true'
+        run: |
+          (New-Object System.Net.WebClient).DownloadFile("https://github.com/gflags/gflags/archive/refs/tags/v2.2.2.zip", "v2.2.2.zip");
+          Expand-Archive -Path v2.2.2.zip -DestinationPath .;
+
+      - name: Setup gflags
+        if: steps.cache-gflags.outputs.cache-hit != 'true'
+        run: |
+          cmake -S gflags-2.2.2 -B build-gflags `
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} `
+                -DBUILD_TESTING=OFF `
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/gflags
+          cmake --build build-gflags `
+                --config ${{matrix.build_type}} `
+                --target install
+
+      - name: Cache glog
+        id: cache-glog
+        uses: actions/cache@v2
+        with:
+          path: glog/
+          key: ${{matrix.msvc}}-glog-0.6.0rc1-${{matrix.arch}}-${{matrix.build_type}}-${{matrix.lib}}
+
+      - name: Download glog
+        if: steps.cache-glog.outputs.cache-hit != 'true'
+        run: |
+          (New-Object System.Net.WebClient).DownloadFile("https://github.com/google/glog/archive/refs/tags/v0.6.0-rc1.zip", "v0.6.0-rc1.zip");
+          Expand-Archive -Path v0.6.0-rc1.zip -DestinationPath .;
+
+      - name: Setup glog
+        if: steps.cache-glog.outputs.cache-hit != 'true'
+        run: |
+          cmake -S glog-0.6.0-rc1 -B build-glog `
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} `
+                -DBUILD_TESTING=OFF `
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/glog `
+                -DCMAKE_PREFIX_PATH=${{github.workspace}}/gflags
+          cmake --build build-glog `
+                --config ${{matrix.build_type}} `
+                --target install
+
+      - name: Cache SuiteSparse
+        id: cache-suitesparse
+        uses: actions/cache@v2
+        with:
+          path: suitesparse/
+          key: ${{matrix.msvc}}-suitesparse-5.10.1-cmake.1-${{matrix.arch}}-${{matrix.build_type}}-${{matrix.lib}}
+
+      - name: Download SuiteSparse
+        if: steps.cache-suitesparse.outputs.cache-hit != 'true'
+        run: |
+          (New-Object System.Net.WebClient).DownloadFile("https://github.com/sergiud/SuiteSparse/releases/download/5.10.1-cmake.1/SuiteSparse-5.10.1-cmake.1-${{matrix.marker}}-Win64-${{matrix.build_type}}-${{matrix.lib}}-gpl.zip", "suitesparse.zip");
+          Expand-Archive -Path suitesparse.zip -DestinationPath ${{github.workspace}}/suitesparse;
+
+      - name: Cache Eigen
+        id: cache-eigen
+        uses: actions/cache@v2
+        with:
+          path: eigen/
+          key: ${{runner.os}}-eigen-3.4.0
+
+      - name: Download Eigen
+        if: steps.cache-eigen.outputs.cache-hit != 'true'
+        run: |
+          (New-Object System.Net.WebClient).DownloadFile("https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.zip", "eigen-3.4.0.zip");
+          Expand-Archive -Path eigen-3.4.0.zip -DestinationPath .;
+
+      - name: Setup Eigen
+        if: steps.cache-eigen.outputs.cache-hit != 'true'
+        run: |
+          cmake -S eigen-3.4.0 -B build-eigen `
+                -DBUILD_TESTING=OFF `
+                -DCMAKE_Fortran_COMPILER= `
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/eigen `
+                -DEIGEN_BUILD_DOC=OFF
+          cmake --build build-eigen `
+                --config ${{matrix.build_type}} `
+                --target install
+
+      - name: Setup Build Environment
+        run: |
+          echo "Eigen3_ROOT=${{github.workspace}}/eigen" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+          echo "gflags_ROOT=${{github.workspace}}/gflags" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+          echo "glog_ROOT=${{github.workspace}}/glog" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+          echo "CMAKE_PREFIX_PATH=${{github.workspace}}/suitesparse" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
+      - name: Setup Runtime Environment
+        run: |
+          echo '${{github.workspace}}\gflags\bin' | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          echo '${{github.workspace}}\glog\bin' | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          echo '${{github.workspace}}\suitesparse\bin' | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+
+      - name: Configure
+        run: |
+          cmake -S . -B build_${{matrix.build_type}}/ `
+                -DBLAS_blas_LIBRARY=${{github.workspace}}/suitesparse/lib/libblas.lib `
+                -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} `
+                -DCMAKE_CONFIGURATION_TYPES=${{matrix.build_type}} `
+                -DCMAKE_INSTALL_PREFIX:PATH=${{github.workspace}}/install `
+                -DLAPACK_lapack_LIBRARY=${{github.workspace}}/suitesparse/lib/liblapack.lib
+
+      - name: Build
+        run: |
+          cmake --build build_${{matrix.build_type}}/ `
+                --config ${{matrix.build_type}}
+
+      - name: Test
+        env:
+          CTEST_OUTPUT_ON_FAILURE: 1
+        run: |
+          cmake --build build_${{matrix.build_type}}/ `
+                --config ${{matrix.build_type}} `
+                --target RUN_TESTS
+
+      - name: Install
+        run: |
+          cmake --build build_${{matrix.build_type}}/ `
+                --config ${{matrix.build_type}} `
+                --target INSTALL
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3e109b5..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,70 +0,0 @@
-language: cpp
-
-matrix:
-  fast_finish: true
-  include:
-  - os: linux
-    dist: bionic
-    sudo: required
-    compiler: gcc
-    env: CERES_BUILD_TARGET=LINUX
-  - os: linux
-    dist: bionic
-    sudo: required
-    compiler: gcc
-    env: CERES_BUILD_TARGET=ANDROID
-  - os: osx
-    osx_image: xcode11.2
-    env: CERES_BUILD_TARGET=OSX
-  - os: osx
-    osx_image: xcode11.2
-    env: CERES_BUILD_TARGET=IOS
-
-env:
-  # As per http://docs.travis-ci.com/user/languages/cpp/#OpenMP-projects don't be greedy with OpenMP.
-  - OMP_NUM_THREADS=4
-
-before_install:
-  - if [ $TRAVIS_OS_NAME = linux ]; then sudo apt-get update -qq; fi
-  - |
-    if [[ "$CERES_BUILD_TARGET" == "ANDROID" ]]; then
-      cd /tmp
-      wget https://dl.google.com/android/repository/android-ndk-r20b-linux-x86_64.zip
-      unzip -qq android-ndk-r20b-linux-x86_64.zip
-    fi
-
-install:
-  - if [ $TRAVIS_OS_NAME = linux ]; then $TRAVIS_BUILD_DIR/travis/install_travis_linux_deps.sh; fi
-  - if [ $TRAVIS_OS_NAME = osx ]; then $TRAVIS_BUILD_DIR/travis/install_travis_osx_deps.sh; fi
-
-before_script:
-  - mkdir /tmp/ceres-build
-  - cd /tmp/ceres-build
-
-script:
-  # NOTE: TRAVIS_BUILD_DIR is actually the source directory for Ceres.
-  - |
-    if [[ "$CERES_BUILD_TARGET" == "LINUX" || "$CERES_BUILD_TARGET" == "OSX" ]]; then
-      cmake $TRAVIS_BUILD_DIR
-    fi
-  - |
-    if [[ "$CERES_BUILD_TARGET" == "ANDROID" ]]; then
-      cmake -DCMAKE_TOOLCHAIN_FILE=/tmp/android-ndk-r20b/build/cmake/android.toolchain.cmake -DEigen3_DIR=/usr/lib/cmake/eigen3 -DANDROID_ABI=arm64-v8a -DANDROID_STL=c++_shared -DANDROID_NATIVE_API_LEVEL=android-29 -DMINIGLOG=ON -DBUILD_EXAMPLES=OFF $TRAVIS_BUILD_DIR
-    fi
-  - |
-    if [[ "$CERES_BUILD_TARGET" == "IOS" ]]; then
-      cmake -DCMAKE_TOOLCHAIN_FILE=$TRAVIS_BUILD_DIR/cmake/iOS.cmake -DEigen3_DIR=/usr/local/share/eigen3/cmake -DIOS_PLATFORM=OS $TRAVIS_BUILD_DIR
-    fi
-  - make -j 4
-  - |
-    if [[ "$CERES_BUILD_TARGET" == "LINUX" || "$CERES_BUILD_TARGET" == "OSX" ]]; then
-      sudo make install
-      ctest --output-on-failure -j 4
-    fi
-
-notifications:
-  email:
-    - alexs.mac@gmail.com
-    - sandwichmaker@gmail.com
-    - keir@google.com
-    - wjr@google.com
diff --git a/README.md b/README.md
index 868cbc0..a559fa5 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
-[![Build Status](https://app.travis-ci.com/ceres-solver/ceres-solver.svg?branch=master)](https://app.travis-ci.com/ceres-solver/ceres-solver)
+[![Android](https://github.com/ceres-solver/ceres-solver/actions/workflows/android.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/android.yml)
+[![Linux](https://github.com/ceres-solver/ceres-solver/actions/workflows/linux.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/linux.yml)
+[![macOS](https://github.com/ceres-solver/ceres-solver/actions/workflows/macOS.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/macOS.yml)
+[![Windows](https://github.com/ceres-solver/ceres-solver/actions/workflows/windows.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/windows.yml)
 
 Ceres Solver
 ============
diff --git a/cmake/iOS.cmake b/cmake/iOS.cmake
index 4029f96..1bb514c 100644
--- a/cmake/iOS.cmake
+++ b/cmake/iOS.cmake
@@ -309,7 +309,7 @@
   ${CMAKE_OSX_SYSROOT}/Developer/Library/Frameworks)
 
 # Only search the specified iOS SDK, not the remainder of the host filesystem.
-set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
 set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
@@ -322,7 +322,6 @@
 
 # This macro lets you find executable programs on the host system.
 macro(find_host_package)
-  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
   set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER)
   set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER)
   set(IOS FALSE)
@@ -330,7 +329,6 @@
   find_package(${ARGN})
 
   set(IOS TRUE)
-  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
   set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
   set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 endmacro(find_host_package)
diff --git a/travis/install_travis_linux_deps.sh b/travis/install_travis_linux_deps.sh
deleted file mode 100755
index fd7cc78..0000000
--- a/travis/install_travis_linux_deps.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-# Stop processing on any error.
-set -e
-
-# Install default versions of standard dependencies that are new enough in 18.04
-sudo apt-get install -y cmake
-sudo apt-get install -y libatlas-base-dev libsuitesparse-dev
-sudo apt-get install -y libgoogle-glog-dev libgflags-dev
-sudo apt-get install -y libeigen3-dev
diff --git a/travis/install_travis_osx_deps.sh b/travis/install_travis_osx_deps.sh
deleted file mode 100755
index adb949e..0000000
--- a/travis/install_travis_osx_deps.sh
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/bin/bash
-
-# Stop processing on any error.
-set -e
-
-function install_if_not_installed() {
-  declare -r formula="$1"
-  if [[ $(brew list ${formula} &>/dev/null; echo $?) -ne 0 ]]; then
-    brew install ${formula}
-  else
-    echo "$0 - ${formula} is already installed."
-  fi
-}
-
-# Manually trigger an update prior to installing packages to avoid Ruby
-# version related errors as per [1].
-#
-# [1]: https://github.com/travis-ci/travis-ci/issues/8552
-brew update
-
-install_if_not_installed cmake
-install_if_not_installed glog
-install_if_not_installed gflags
-install_if_not_installed eigen
-install_if_not_installed suite-sparse