sanitize_ld=(
        -fsanitize=leak
)

sanitize_cc=(
    -fsanitize=address
    -fsanitize=null
    -fsanitize=bounds
    -fsanitize=vla-bound
    -fsanitize=object-size

    -fsanitize=unreachable
    -fsanitize=return # C++ only

    # -fsanitize=shift
    # -fsanitize=shift-exponent
    # -fsanitize=shift-base
    # -fsanitize=integer-divide-by-zero
    # -fsanitize=signed-integer-overflow

    -fsanitize=float-divide-by-zero
    -fsanitize=float-cast-overflow
    -fsanitize=nonnull-attribute
    -fsanitize=returns-nonnull-attribute
    -fsanitize=bool
    -fsanitize=enum
    -fsanitize=vptr # C++ only


    -fsanitize-address-use-after-scope
    -fsanitize-undefined-trap-on-error
    -fstack-protector-all
    -fstack-check
)


function trim_spaces(){
    local string="$1"
    # ${a## } or ${a%% } doesn't work! (in bash 4.3).
    string="$(echo "$string" | sed -e 's/^ *//' -e 's/ *$//')"
    echo -n "${string}"
}

function trim_colons(){
    local string="$1"
    string="$(echo "$string" | sed -e 's/^:*//' -e 's/:*$//')"
    echo -n "${string}"
}

function with_gcc_8(){
    gcc_prefix="/usr/local/gcc"
    libs=(${gcc_prefix}/lib64 ${gcc_prefix}/lib /usr/local/lib64 /usr/local/lib /usr/lib /lib )
    export PATH=$(trim_colons "${gcc_prefix}/bin:${PATH}")
    export CFLAGS=$(trim_spaces "-I${gcc_prefix}/include ${CFLAGS:-}")
    export CXXFLAGS=$(trim_spaces "-I${gcc_prefix}/include ${CXXFLAGS:-}")
    export LDFLAGS=$(trim_spaces "${LDFLAGS:-} $(printf -- "-L%s " "${libs[@]}") ")
    export LD_LIBRARY_PATH="$(trim_colons $(printf -- "%s:" "${libs[@]}"))"
    export PKG_CONFIG_PATH="${gcc_prefix}/lib/pkgconfig:/usr/local/lib/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig:/usr/lib/x86_64-linux-gnu/pkgconfig"

    case "$(gcc -dumpversion)" in
    [789]*)
        export CFLAGS=$(trim_spaces "${CFLAGS:-} ${sanitize_cc[*]} -g -g3 -ggdb -O0")
        export LDFLAGS=$(trim_spaces "${LDFLAGS:-} ${sanitize_ld[*]}")
        ;;
    *)
        export CFLAGS=$(trim_spaces "${CFLAGS:-} -g -g3 -ggdb -O0")
        export LDFLAGS=$(trim_spaces "${LDFLAGS:-}")
        ;;
    esac

    # for var in PATH CFLAGS CXXFLAGS LDFLAGS LD_LIBRARY_PATH PKG_CONFIG_PATH ; do
    #     printf "export %s='%s'\n" "${var}" "${!var}"
    # done
}

with_gcc_8