#!/bin/sh -eux

set pipefail

if [ -z "${CXXLIBS:-}" ]; then

  echo "CXXLIBS variable is a required input but it's not specified!"

  echo "Test metadata should have picked a proper value, depending on distro."

  exit 1

fi

status=0

test_toolchain() {

    toolchain=$@

    args=""

    while [ $# -gt 0 ]; do

        case $1 in

            clang)

                compiler=$1

                src=hello.c

                ;;

            clang++)

                compiler=$1

                src=hello.cpp

                ;;

            compiler-rt)

                args="$args -rtlib=$1"

                ;;

            libc++)

                args="$args -stdlib=$1"

                ;;

            libstdc++)

                args="$args -stdlib=$1"

                ;;

            lld)

                args="$args -fuse-ld=$1"

                ;;

            *)

                args="$args $1"

                ;;

        esac

    shift

    done

    cmd="$compiler $args $src"

    rm -f a.out

    echo "* $toolchain"

    echo "  command: $cmd"

    if $cmd && ./a.out | grep -q 'Hello World'; then

        echo "  PASS"

    else

        echo "  FAIL"

        status=1

    fi

}

clang --version

# Repoquery is needed instead yum info for compatibility with RHEL-7

repoquery -i --installed $(rpm -qf $(which clang)) | grep ^Source

echo ""

for compiler in clang clang++; do

    for rtlib in "" compiler-rt; do

        for linker in "" lld; do

            for cxxlib in "" $CXXLIBS; do

                if [ "$compiler" = "clang" -a -n "$cxxlib" ]; then

                    continue

                fi

                for args in "" -static; do

                    # Skip known failures

                    # TODO: Fix these

                    if [[ "$args" = "-static" && "$rtlib" = "compiler-rt" ]]; then

                        continue

                    fi

                    # Static libc++ needs -pthread

                    if [[ "$args" = "-static" && "$cxxlib" = "libc++" ]]; then

                      args="$args -pthread"

                    fi

                    # lld is not supported in s390x and ppc64

                    if [[ "$(uname -m)" = "s390x" || "$(uname -m)" = "ppc64" ]] \

                        && [[ "$linker" = "lld" ]];

                    then

                      continue

                    fi

                    # compiler-rt does not provide builtins for s390x

                    if [[ "$(uname -m)" = "s390x" && "$rtlib" = "compiler-rt" ]]; then

                      continue

                    fi

                    test_toolchain $compiler $rtlib $linker $cxxlib $args

                done

            done

        done

    done

done

exit $status