Roadmap + spikes (R1/R3/R5) + M1 tail calls + M2 value-model/GC migration (S0–S2)

.github/workflows/clang-tidy.yml

@@ -48,7 +48,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build libgmp-dev \
+          sudo apt-get install -y ninja-build libgmp-dev libgc-dev \
             "clang-${LLVM_VERSION}" "clang-tidy-${LLVM_VERSION}" \
             "clang-tools-${LLVM_VERSION}" "llvm-${LLVM_VERSION}-dev" \
             "llvm-${LLVM_VERSION}-tools"

.github/workflows/codecov.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Install build dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build libgmp-dev lcov gcc-14 g++-14 \
+          sudo apt-get install -y ninja-build libgmp-dev libgc-dev lcov gcc-14 g++-14 \
             "llvm-${LLVM_VERSION}-dev" "llvm-${LLVM_VERSION}-tools" python3-pip
           echo "/usr/lib/llvm-${LLVM_VERSION}/bin" >> "$GITHUB_PATH"
 

.github/workflows/codeql.yml

@@ -45,7 +45,7 @@ jobs:
       - name: Install build dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build libgmp-dev "clang-${LLVM_VERSION}" \
+          sudo apt-get install -y ninja-build libgmp-dev libgc-dev "clang-${LLVM_VERSION}" \
             "llvm-${LLVM_VERSION}-dev" "llvm-${LLVM_VERSION}-tools"
 
       - name: Initialize CodeQL

.github/workflows/scan-build.yml

@@ -42,7 +42,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build libgmp-dev "clang-${LLVM_VERSION}" \
+          sudo apt-get install -y ninja-build libgmp-dev libgc-dev "clang-${LLVM_VERSION}" \
             "clang-tools-${LLVM_VERSION}" "llvm-${LLVM_VERSION}-dev" "llvm-${LLVM_VERSION}-tools"
           echo "/usr/lib/llvm-${LLVM_VERSION}/bin" >> "$GITHUB_PATH"
 

.github/workflows/test.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Install build dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build libgmp-dev \
+          sudo apt-get install -y ninja-build libgmp-dev libgc-dev \
             "llvm-${LLVM_VERSION}-dev" "llvm-${LLVM_VERSION}-tools" python3-pip
           if [ "${{ matrix.compiler }}" = "clang" ]; then
             sudo apt-get install -y "clang-${LLVM_VERSION}"
@@ -83,7 +83,7 @@ jobs:
       - name: Install build dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y ninja-build libgmp-dev \
+          sudo apt-get install -y ninja-build libgmp-dev libgc-dev \
             "clang-${LLVM_VERSION}" "llvm-${LLVM_VERSION}-dev" \
             "llvm-${LLVM_VERSION}-tools" python3-pip
           echo "/usr/lib/llvm-${LLVM_VERSION}/bin" >> "$GITHUB_PATH"

CMakeLists.txt

@@ -94,6 +94,12 @@ endif()
 
 message(STATUS "Found GMP library")
 
+# Configure the Boehm-Demers-Weiser GC (M2 value model). Shipped as pkg-config
+# `bdw-gc`; exposes the imported target PkgConfig::BDWGC.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(BDWGC REQUIRED IMPORTED_TARGET bdw-gc)
+message(STATUS "Found Boehm GC ${BDWGC_VERSION}")
+
 # Configure LLVM
 find_package(LLVM REQUIRED CONFIG)
 message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")