CI: fail if env2cmake access undefined variables

- Set empty default variables if CUDA, HIP or SYCL backend is not enabled to avoid unbound variables.
- Set CMake default configuration variables to avoid unbound variables.
- Set alpaka_DEBUG to 0 if not set. In an upcoming PR, the job generator should set more jobs to `alpaka_DEBUG=2`.
- Remove quotes for many CMake configuration arguments, to make CMake output more readable. If argument values contains white spaces, quotes are not avoidable.

.github/workflows/ci.yml

@@ -72,7 +72,9 @@ env:
   alpaka_ACC_GPU_CUDA_ONLY_MODE: OFF
   alpaka_ACC_GPU_HIP_ENABLE: OFF
   alpaka_ACC_GPU_HIP_ONLY_MODE: OFF
+  alpaka_ACC_SYCL_ENABLE: OFF
   alpaka_USE_MDSPAN: OFF
+  alpaka_DEBUG: 0
   alpaka_ENABLE_WERROR: ON
   CMAKE_INSTALL_PREFIX: ${{ github.workspace }}/_install
 
@@ -111,7 +113,7 @@ jobs:
         ### Analysis builds
         - name: linux_clang-14_cuda-11.2_debug_analysis
           os: ubuntu-20.04
-          env: {ALPAKA_CI_CXX: clang++, ALPAKA_CI_CLANG_VER: 14,     ALPAKA_CI_STDLIB: libstdc++, CMAKE_BUILD_TYPE: Debug,   ALPAKA_BOOST_VERSION: 1.79.0, ALPAKA_CI_CMAKE_VER: 3.25.3, OMP_NUM_THREADS: 4, ALPAKA_CI_ANALYSIS: ON, ALPAKA_CI_RUN_TESTS: OFF, alpaka_DEBUG: 1, alpaka_ACC_GPU_CUDA_ENABLE: ON, ALPAKA_CI_CUDA_VERSION: "11.2", ALPAKA_CI_CUDA_COMPILER : clang++,   alpaka_ACC_CPU_B_OMP2_T_SEQ_ENABLE: OFF, alpaka_ACC_CPU_B_SEQ_T_OMP2_ENABLE: OFF}
+          env: {ALPAKA_CI_CXX: clang++, ALPAKA_CI_CLANG_VER: 14,     ALPAKA_CI_STDLIB: libstdc++, CMAKE_BUILD_TYPE: Debug,   ALPAKA_BOOST_VERSION: 1.79.0, ALPAKA_CI_CMAKE_VER: 3.25.3, OMP_NUM_THREADS: 4, ALPAKA_CI_ANALYSIS: ON, ALPAKA_CI_RUN_TESTS: OFF, alpaka_DEBUG: 1, alpaka_ACC_GPU_CUDA_ENABLE: ON, ALPAKA_CI_CUDA_VERSION: "11.2", ALPAKA_CI_CUDA_COMPILER : clang++,   alpaka_ACC_CPU_B_OMP2_T_SEQ_ENABLE: OFF, alpaka_ACC_CPU_B_SEQ_T_OMP2_ENABLE: OFF, CMAKE_CUDA_ARCHITECTURES: 61, alpaka_RELOCATABLE_DEVICE_CODE: OFF, alpaka_CUDA_SHOW_REGISTER: OFF, alpaka_CUDA_KEEP_FILES: OFF, alpaka_CUDA_EXPT_EXTENDED_LAMBDA: OFF}
           container: ubuntu:20.04
         - name: windows_cl-2022_debug_analysis
           os: windows-2022

script/before_install.sh

@@ -43,6 +43,14 @@ export ALPAKA_CI_INSTALL_CUDA="OFF"
 if [[ "${alpaka_ACC_GPU_CUDA_ENABLE}" == "ON" ]]
 then
     export ALPAKA_CI_INSTALL_CUDA="ON"
+else
+    echo_yellow "<SETENV: set cuda environment variables for disabled backend>"
+    export alpaka_RELOCATABLE_DEVICE_CODE=${alpaka_RELOCATABLE_DEVICE_CODE:=""}
+    export CMAKE_CUDA_ARCHITECTURES=${CMAKE_CUDA_ARCHITECTURES:=""}
+    export CMAKE_CUDA_COMPILER=${CMAKE_CUDA_COMPILER:=""}
+    export alpaka_CUDA_SHOW_REGISTER=${alpaka_CUDA_SHOW_REGISTER:=""}
+    export alpaka_CUDA_KEEP_FILES=${alpaka_CUDA_KEEP_FILES:=""}
+    export alpaka_CUDA_EXPT_EXTENDED_LAMBDA=${alpaka_CUDA_EXPT_EXTENDED_LAMBDA:=""}
 fi
 
 #-------------------------------------------------------------------------------
@@ -51,6 +59,10 @@ export ALPAKA_CI_INSTALL_HIP="OFF"
 if [ "${alpaka_ACC_GPU_HIP_ENABLE}" == "ON" ]
 then
     export ALPAKA_CI_INSTALL_HIP="ON"
+else
+    echo_yellow "<DEFAULT: hip environment variables for disabled backend>"
+    export CMAKE_HIP_ARCHITECTURES=${CMAKE_HIP_ARCHITECTURES:=""}
+    export CMAKE_HIP_COMPILER=${CMAKE_HIP_COMPILER:=""}
 fi
 
 #-------------------------------------------------------------------------------
@@ -99,6 +111,12 @@ if [[ "${ALPAKA_CI_CXX}" == "icpx" ]]; then
     fi
 fi
 
+if [ "${alpaka_ACC_SYCL_ENABLE}" == "OFF" ]; then
+    echo_yellow "<DEFAULT: SYCL environment variables for disabled backend>"
+    export alpaka_SYCL_ONEAPI_CPU=${alpaka_SYCL_ONEAPI_CPU:=""}
+    export alpaka_SYCL_ONEAPI_CPU_ISA=${alpaka_SYCL_ONEAPI_CPU_ISA:=""}
+fi
+
 #-------------------------------------------------------------------------------
 if [ "$ALPAKA_CI_OS_NAME" = "Linux" ]
 then

script/gitlabci/job_base.yml

@@ -9,6 +9,7 @@
     ALPAKA_CI_BUILD_JOBS: "$CI_CPUS"
     OMP_NUM_THREADS: "$CI_CPUS"
   script:
+    - source ./script/set_default_env_vars.sh
     - source ./script/gitlabci/print_env.sh
     - source ./script/gitlab_ci_run.sh
   interruptible: true

script/gitlabci/job_cuda.yml

@@ -13,6 +13,9 @@ linux_nvcc12.0_gcc11_debug_relocatable_device_code_compile_only:
     ALPAKA_CI_CMAKE_VER: 3.26.5
     alpaka_CXX_STANDARD: 20
     alpaka_RELOCATABLE_DEVICE_CODE: "ON"
+    alpaka_CUDA_SHOW_REGISTER: "OFF"
+    alpaka_CUDA_KEEP_FILES: "OFF"
+    alpaka_CUDA_EXPT_EXTENDED_LAMBDA: "OFF"
 
 linux_nvcc12.0_gcc11_release_extended_lambda_off_compile_only:
   extends: .base_cuda_gcc_compile_only
@@ -26,4 +29,7 @@ linux_nvcc12.0_gcc11_release_extended_lambda_off_compile_only:
     ALPAKA_CI_CMAKE_VER: 3.27.1
     alpaka_CXX_STANDARD: 20
     alpaka_ACC_GPU_CUDA_ENABLE: "ON"
+    alpaka_RELOCATABLE_DEVICE_CODE: "OFF"
+    alpaka_CUDA_SHOW_REGISTER: "OFF"
+    alpaka_CUDA_KEEP_FILES: "OFF"
     alpaka_CUDA_EXPT_EXTENDED_LAMBDA: "OFF"

script/install_clang.sh

@@ -32,7 +32,7 @@ else
     if { [ "${ALPAKA_CI_UBUNTU_NAME}" == "focal" ] && [ "${ALPAKA_CI_CLANG_VER}" -ge 13 ]; } || \
     { [ "${ALPAKA_CI_UBUNTU_NAME}" == "jammy" ] && [ "${ALPAKA_CI_CLANG_VER}" -ge 15 ]; }
     then
-        sudo add-apt-repository "deb http://apt.llvm.org/${ALPAKA_CI_UBUNTU_NAME}/ llvm-toolchain-${ALPAKA_CI_UBUNTU_NAME}-$ALPAKA_CI_CLANG_VER main"
+        sudo add-apt-repository -y "deb http://apt.llvm.org/${ALPAKA_CI_UBUNTU_NAME}/ llvm-toolchain-${ALPAKA_CI_UBUNTU_NAME}-$ALPAKA_CI_CLANG_VER main"
     fi
 
     travis_retry sudo apt-get -y --quiet --allow-unauthenticated --no-install-recommends install clang-${ALPAKA_CI_CLANG_VER}

script/install_tbb.sh

@@ -45,6 +45,6 @@ else
         # run the mv in PS, because INNER_FOLDER contains backslashes (from github.workspace variable) and bash fails to glob
         powershell.exe -Command mv "${INNER_FOLDER}/*" "${TBB_ROOT}/"
         rm -r "${INNER_FOLDER}"
-        export TBB_DIR="${TBB_ROOT}/lib/cmake/tbb"
+        export ALPAKA_CI_TBB_DIR="${TBB_ROOT}/lib/cmake/tbb"
     fi
 fi

script/job_generator/generate_job_yaml.py

@@ -345,6 +345,9 @@ def job_variables(job: Dict[str, Tuple[str, str]]) -> Dict[str, str]:
         variables["ALPAKA_CI_STDLIB"] = "libstdc++"
         variables["CMAKE_CUDA_ARCHITECTURES"] = job[SM_LEVEL][VERSION]
         variables["ALPAKA_CI_CUDA_VERSION"] = job[ALPAKA_ACC_GPU_CUDA_ENABLE][VERSION]
+        variables["alpaka_RELOCATABLE_DEVICE_CODE"] = "OFF"
+        variables["alpaka_CUDA_SHOW_REGISTER"] = "OFF"
+        variables["alpaka_CUDA_KEEP_FILES"] = "OFF"
         variables["alpaka_CUDA_EXPT_EXTENDED_LAMBDA"] = "OFF"
 
     if job[DEVICE_COMPILER][NAME] == NVCC:
@@ -451,6 +454,9 @@ def global_variables() -> Dict[str, str]:
     variables["ALPAKA_CI_CUDA_DIR"] = "$HOME/cuda"
     variables["ALPAKA_CI_HIP_ROOT_DIR"] = "$HOME/hip"
     variables["alpaka_ENABLE_WERROR"] = "ON"
+    # TODO(SimeonEhrig): Implement algorithm which select for each backend one
+    # job and set alpaka_DEBUG=2
+    variables["alpaka_DEBUG"] = 0
 
     return variables
 

script/run_generate.sh

@@ -21,15 +21,24 @@ echo_green "<SCRIPT: run_generate>"
 #
 # @param $1 cmake/environment variable name
 #
-# @result if $1 exists cmake variable definition else nothing is returned
+# @result if $1 exists cmake variable definition else nothing is returned. If variable is not
+# defined, the script will be exited.
 #
 # @code{.bash}
 # FOO=ON
+# BAR=""
 # echo "$(env2cmake FOO)" # returns "-DFOO=ON"
 # echo "$(env2cmake BAR)" # returns nothing
+# echo "$(env2cmake FOOBAR)" # exit 1
 # @endcode
 function env2cmake()
 {
+    # check if variable is defined
+    if [ -z ${!1+x} ]; then
+        kill -SIGTERM $$
+    fi
+
+    # return only content of variable is not empty
     if [ ! -z "${!1}" ] ; then
         echo -n "-D$1=${!1}"
     fi
@@ -80,19 +89,19 @@ mkdir -p build/
 cd build/
 
 "${ALPAKA_CI_CMAKE_EXECUTABLE}" --log-level=VERBOSE -G "${ALPAKA_CI_CMAKE_GENERATOR}" ${ALPAKA_CI_CMAKE_GENERATOR_PLATFORM}\
-    -Dalpaka_BUILD_EXAMPLES=ON -DBUILD_TESTING=ON -Dalpaka_BUILD_BENCHMARKS=ON "$(env2cmake alpaka_ENABLE_WERROR)" \
-    "$(env2cmake BOOST_ROOT)" -DBOOST_LIBRARYDIR="${ALPAKA_CI_BOOST_LIB_DIR}/lib" -DBoost_USE_STATIC_LIBS=ON -DBoost_USE_MULTITHREADED=ON -DBoost_USE_STATIC_RUNTIME=OFF -DBoost_ARCHITECTURE="-x64" \
-    "$(env2cmake CMAKE_BUILD_TYPE)" "$(env2cmake CMAKE_CXX_FLAGS)" "$(env2cmake CMAKE_CXX_COMPILER)" "$(env2cmake CMAKE_EXE_LINKER_FLAGS)" "$(env2cmake CMAKE_CXX_EXTENSIONS)"\
-    "$(env2cmake alpaka_ACC_CPU_B_SEQ_T_SEQ_ENABLE)" "$(env2cmake alpaka_ACC_CPU_B_SEQ_T_THREADS_ENABLE)" \
-    "$(env2cmake alpaka_ACC_CPU_B_TBB_T_SEQ_ENABLE)" \
-    "$(env2cmake alpaka_ACC_CPU_B_OMP2_T_SEQ_ENABLE)" "$(env2cmake alpaka_ACC_CPU_B_SEQ_T_OMP2_ENABLE)" \
-    "$(env2cmake TBB_DIR)" \
-    "$(env2cmake alpaka_RELOCATABLE_DEVICE_CODE)" \
-    "$(env2cmake alpaka_ACC_GPU_CUDA_ENABLE)" "$(env2cmake alpaka_ACC_GPU_CUDA_ONLY_MODE)" "$(env2cmake CMAKE_CUDA_ARCHITECTURES)" "$(env2cmake CMAKE_CUDA_COMPILER)" "$(env2cmake CMAKE_CUDA_FLAGS)" \
-    "$(env2cmake alpaka_CUDA_FAST_MATH)" "$(env2cmake alpaka_CUDA_FTZ)" "$(env2cmake alpaka_CUDA_SHOW_REGISTER)" "$(env2cmake alpaka_CUDA_KEEP_FILES)" "$(env2cmake alpaka_CUDA_EXPT_EXTENDED_LAMBDA)" \
-    "$(env2cmake alpaka_ACC_GPU_HIP_ENABLE)" "$(env2cmake alpaka_ACC_GPU_HIP_ONLY_MODE)" "$(env2cmake CMAKE_HIP_ARCHITECTURES)" "$(env2cmake CMAKE_HIP_COMPILER)" "$(env2cmake CMAKE_HIP_FLAGS)" \
-    "$(env2cmake alpaka_ACC_SYCL_ENABLE)" "$(env2cmake alpaka_SYCL_ONEAPI_CPU)" "$(env2cmake alpaka_SYCL_ONEAPI_CPU_ISA)" \
-    "$(env2cmake alpaka_DEBUG)" "$(env2cmake alpaka_CI)" "$(env2cmake alpaka_CHECK_HEADERS)" "$(env2cmake alpaka_CXX_STANDARD)" "$(env2cmake alpaka_USE_MDSPAN)" "$(env2cmake CMAKE_INSTALL_PREFIX)" \
-    ".."
+    -Dalpaka_BUILD_EXAMPLES=ON -DBUILD_TESTING=ON -Dalpaka_BUILD_BENCHMARKS=ON $(env2cmake alpaka_ENABLE_WERROR) \
+    $(env2cmake BOOST_ROOT) -DBOOST_LIBRARYDIR="${ALPAKA_CI_BOOST_LIB_DIR}/lib" -DBoost_USE_STATIC_LIBS=ON -DBoost_USE_MULTITHREADED=ON -DBoost_USE_STATIC_RUNTIME=OFF -DBoost_ARCHITECTURE="-x64" \
+    $(env2cmake CMAKE_BUILD_TYPE) "$(env2cmake CMAKE_CXX_FLAGS)" $(env2cmake CMAKE_CXX_COMPILER) "$(env2cmake CMAKE_EXE_LINKER_FLAGS)" $(env2cmake CMAKE_CXX_EXTENSIONS)\
+    $(env2cmake alpaka_ACC_CPU_B_SEQ_T_SEQ_ENABLE) $(env2cmake alpaka_ACC_CPU_B_SEQ_T_THREADS_ENABLE) \
+    $(env2cmake alpaka_ACC_CPU_B_TBB_T_SEQ_ENABLE) \
+    $(env2cmake alpaka_ACC_CPU_B_OMP2_T_SEQ_ENABLE) $(env2cmake alpaka_ACC_CPU_B_SEQ_T_OMP2_ENABLE) \
+    $(env2cmake ALPAKA_CI_TBB_DIR) \
+    $(env2cmake alpaka_RELOCATABLE_DEVICE_CODE) \
+    $(env2cmake alpaka_ACC_GPU_CUDA_ENABLE) $(env2cmake alpaka_ACC_GPU_CUDA_ONLY_MODE) $(env2cmake CMAKE_CUDA_ARCHITECTURES) $(env2cmake CMAKE_CUDA_COMPILER) "$(env2cmake CMAKE_CUDA_FLAGS)" \
+    $(env2cmake alpaka_CUDA_SHOW_REGISTER) $(env2cmake alpaka_CUDA_KEEP_FILES) $(env2cmake alpaka_CUDA_EXPT_EXTENDED_LAMBDA) \
+    $(env2cmake alpaka_ACC_GPU_HIP_ENABLE) $(env2cmake alpaka_ACC_GPU_HIP_ONLY_MODE) $(env2cmake CMAKE_HIP_ARCHITECTURES) $(env2cmake CMAKE_HIP_COMPILER) "$(env2cmake CMAKE_HIP_FLAGS)" \
+    $(env2cmake alpaka_ACC_SYCL_ENABLE) $(env2cmake alpaka_SYCL_ONEAPI_CPU) $(env2cmake alpaka_SYCL_ONEAPI_CPU_ISA) \
+    $(env2cmake alpaka_DEBUG) $(env2cmake alpaka_CI) $(env2cmake alpaka_CHECK_HEADERS) $(env2cmake alpaka_CXX_STANDARD) $(env2cmake alpaka_USE_MDSPAN) $(env2cmake CMAKE_INSTALL_PREFIX) \
+    ..
 
 cd ..

script/set_default_env_vars.sh

@@ -2,6 +2,11 @@
 
 # set default values for unset environment variables
 
+export CMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS:=""}
+export CMAKE_EXE_LINKER_FLAGS=${CMAKE_EXE_LINKER_FLAGS:=""}
 export CMAKE_CXX_EXTENSIONS=${CMAKE_CXX_EXTENSIONS:="ON"}
 export CMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX:=""}
 
+export CMAKE_CUDA_FLAGS=${CMAKE_CUDA_FLAGS:=""}
+export CMAKE_HIP_FLAGS=${CMAKE_HIP_FLAGS:=""}
+export ALPAKA_CI_TBB_DIR=${ALPAKA_CI_TBB_DIR:=""}