ci: LLVM support

Update CI scripts to also build the tests with various versions of
LLVM. Versions below 17 can't be installed with the official llvm.sh
script, so for now let's test only 17+.

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>

Author: theihor

.github/scripts/build.sh

@@ -2,12 +2,16 @@
 
 set -euo pipefail
 
-GCC_VERSION=${GCC_VERSION:-13}
-SHARED=${SHARED:-0}
-
-export CC=gcc-${GCC_VERSION}
-export CXX=g++-${GCC_VERSION}
-export AR=gcc-ar-${GCC_VERSION}
+if [ "$COMPILER" == "llvm" ]; then
+        export CC="clang-${COMPILER_VERSION}"
+        export CXX="clang++-${COMPILER_VERSION}"
+        export AR="llvm-ar-${COMPILER_VERSION}"
+        export LD="lld-${COMPILER_VERSION}"
+elif [ "$COMPILER" == "gcc" ]; then
+        export CC="gcc-${COMPILER_VERSION}"
+        export CXX="g++-${COMPILER_VERSION}"
+        export AR="gcc-ar-${COMPILER_VERSION}"
+fi
 
 make -C tests clean
-make SHARED=${SHARED} -C tests -j$(nproc) build
+make SHARED=${SHARED:-0} -C tests -j$(nproc) build

.github/scripts/setup.sh

@@ -5,15 +5,22 @@ set -euo pipefail
 # Assume sudo in this script
 GITHUB_WORKSPACE=${GITHUB_WORKSPACE:-$(pwd)}
 BPFTRACE_VERSION=${BPFTRACE_VERSION:-0.22.1}
-GCC_VERSION=${GCC_VERSION:-13}
+COMPILER=${COMPILER:-gcc}
+COMPILER_VERSION=${COMPILER_VERSION:-13}
 
 # Install pre-requisites
-export DEBIAN_FRONTEND=noninteractive
 apt-get update -y
-apt-get install -y curl file gawk libfuse2t64 make sudo
+DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
+apt-get install -y curl file gawk gnupg libfuse2t64 lsb-release make software-properties-common sudo wget
 
 # Install CC
-apt-get install -y gcc-${GCC_VERSION} g++-${GCC_VERSION}
+if [ "$COMPILER" == "llvm" ]; then
+        curl -O https://apt.llvm.org/llvm.sh
+        chmod +x llvm.sh
+        ./llvm.sh ${COMPILER_VERSION}
+else
+        apt-get install -y gcc-${COMPILER_VERSION} g++-${COMPILER_VERSION}
+fi
 
 ${GITHUB_WORKSPACE}/.github/scripts/install-bpftrace.sh
 

.github/workflows/test.yml

@@ -9,17 +9,28 @@ on:
 jobs:
   build-and-test:
 
-    runs-on: ubuntu-latest
-
     strategy:
+      fail-fast: false
       matrix:
-        gcc-version: [ 10, 11, 12, 13, 14 ]
+        runs-on: [ 'ubuntu-latest' ]
         shared: [ 0, 1 ]
+        compiler:
+          - { name: 'gcc', version: 11 }
+          - { name: 'gcc', version: 12 }
+          - { name: 'gcc', version: 13 }
+          - { name: 'gcc', version: 14 }
+          - { name: 'llvm', version: 17 }
+          - { name: 'llvm', version: 18 }
+          - { name: 'llvm', version: 19 }
+
+    runs-on: ${{ matrix.runs-on }}
 
-    name: gcc-${{ matrix.gcc-version }} SHARED=${{ matrix.shared }}
+    name: ${{ endsWith(matrix.runs-on, '-arm') && 'arm64' || 'x86_64' }} SHARED=${{ matrix.shared }} ${{ matrix.compiler.name }}-${{ matrix.compiler.version }}
 
     env:
-      GCC_VERSION: ${{ matrix.gcc-version }}
+      ARCH: ${{ endsWith(matrix.runs-on, '-arm') && 'arm64' || 'x86_64' }}
+      COMPILER: ${{ matrix.compiler.name }}
+      COMPILER_VERSION: ${{ matrix.compiler.version }}
       SHARED: ${{ matrix.shared }}
 
     steps: