Add sccache to CI (#338)

.github/workflows/build.yml

@@ -52,6 +52,14 @@ jobs:
             sudo update-alternatives --set cc /usr/bin/clang-${{ env.LLVM_VERSION }}
             sudo update-alternatives --set c++ /usr/bin/clang++-${{ env.LLVM_VERSION }}
 
+        - name: Run sccache-cache
+          uses: mozilla-actions/sccache-action@v0.0.9
+
+        - name: Setup Environment Variables
+          shell: bash
+          run: |
+            echo "SCCACHE_GHA_ENABLED=true" >> $GITHUB_ENV
+
         - name: CMake Build
           run: cmake --preset=release -DMOMO_ENABLE_CLANG_TIDY=On && cmake --build --preset=release
 
@@ -86,6 +94,14 @@ jobs:
       - name: Enable Developer Command Prompt
         uses: ilammy/msvc-dev-cmd@v1.13.0
 
+      - name: Run sccache-cache
+        uses: mozilla-actions/sccache-action@v0.0.9
+
+      - name: Setup Environment Variables
+        shell: bash
+        run: |
+          echo "SCCACHE_GHA_ENABLED=true" >> $GITHUB_ENV
+
       - name: CMake Build
         run: cmake --preset=release && cmake --build --preset=release -t dump-apiset
 
@@ -255,7 +271,15 @@ jobs:
           ndk-version: r26d
           add-to-path: false
 
+      - name: Run sccache-cache
+        uses: mozilla-actions/sccache-action@v0.0.9
+
       - name: Setup Environment Variables
+        shell: bash
+        run: |
+          echo "SCCACHE_GHA_ENABLED=true" >> $GITHUB_ENV
+
+      - name: Setup Android Environment Variables
         shell: bash
         if: ${{ startsWith(matrix.platform, 'Android') }}
         run: |

CMakeLists.txt

@@ -29,6 +29,9 @@ endif()
 # It doesn't support it, even if it thinks it does...
 set(ENV{ARCHFLAGS} "nope")
 
+##########################################
+
+include(cmake/sccache.cmake)
 
 ##########################################
 

CMakePresets.json

@@ -23,7 +23,7 @@
                 "build"
             ],
             "cacheVariables": {
-                "CMAKE_BUILD_TYPE": "Release"
+                "CMAKE_BUILD_TYPE": "RelWithDebInfo"
             }
         },
         {

cmake/compiler-env.cmake

@@ -145,10 +145,6 @@ if(MSVC)
     /INCREMENTAL:NO
   )
 
-  momo_add_c_and_cxx_release_compile_options(
-    /Ob2
-  )
-
   add_compile_definitions(
     _CRT_SECURE_NO_WARNINGS
     _CRT_NONSTDC_NO_WARNINGS
@@ -199,24 +195,6 @@ endif()
 
 ##########################################
 
-set(OPT_DEBUG "-O0 -g")
-set(OPT_RELEASE "-O3 -g")
-
-if(MSVC)
-  set(OPT_DEBUG "/Od /Ob0 /Zi")
-  set(OPT_RELEASE "/O2 /Ob2 /Zi")
-
-  add_link_options(/DEBUG)
-endif()
-
-set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${OPT_DEBUG}")
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${OPT_DEBUG}")
-
-set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${OPT_RELEASE}")
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${OPT_RELEASE}")
-
-##########################################
-
 if(CMAKE_GENERATOR MATCHES "Visual Studio")
   momo_add_c_and_cxx_compile_options(/MP)
 endif()

cmake/sccache.cmake

@@ -0,0 +1,13 @@
+include_guard()
+
+find_program(SCCACHE sccache)
+
+if (SCCACHE)
+    set(CMAKE_C_COMPILER_LAUNCHER ${SCCACHE})
+    set(CMAKE_CXX_COMPILER_LAUNCHER ${SCCACHE})
+    set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT Embedded)
+
+    if(POLICY CMP0141)
+        cmake_policy(SET CMP0141 NEW)
+    endif()
+endif()

src/backends/icicle-emulator/icicle-bridge/CMakeLists.txt

@@ -35,13 +35,18 @@ endif()
 
 set(ICICLE_RUST_LIB ${ICICLE_ARTIFACT_DIR}/${ICICLE_RUST_LIBNAME})
 
+set(SCCACHE_ENV "MOMO_DUMMY_ENV=1")
+if (SCCACHE)
+  set(SCCACHE_ENV "RUSTC_WRAPPER=${SCCACHE}")
+endif()
+
 ExternalProject_Add(
     icicle-rust-project
     PREFIX ${CMAKE_CURRENT_BINARY_DIR}
     SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}
     BINARY_DIR ${CMAKE_CURRENT_LIST_DIR}
     CONFIGURE_COMMAND ""
-    BUILD_COMMAND ${CMAKE_COMMAND} -E env "CARGO_TARGET_DIR=${ICICLE_BUILD_DIR}" cargo build ${CARGO_OPTIONS} --lib --profile $<IF:$<CONFIG:Debug>,dev,release>
+    BUILD_COMMAND ${CMAKE_COMMAND} -E env "CARGO_TARGET_DIR=${ICICLE_BUILD_DIR}" "${SCCACHE_ENV}" -- cargo build ${CARGO_OPTIONS} --lib --profile $<IF:$<CONFIG:Debug>,dev,release>
     INSTALL_COMMAND ""
     USES_TERMINAL_CONFIGURE 1
     USES_TERMINAL_BUILD 1