set -ex

# FIXME(japarix/xargo#186) this shouldn't be necessary
export RUST_TARGET_PATH=`pwd`

case $1 in
    thumb*)
        cargo=xargo
        ;;
    *)
        cargo=cargo
        ;;
esac

INTRINSICS_FEATURES="c"

# Some architectures like ARM apparently seem to require the `mem` feature
# enabled to successfully compile the `intrinsics` example, and... we're not
# sure why!
if [ -z "$INTRINSICS_FAILS_WITH_MEM_FEATURE" ]; then
  INTRINSICS_FEATURES="$INTRINSICS_FEATURES mem"
fi

# Test our implementation
case $1 in
    thumb*)
        run="xargo test --manifest-path testcrate/Cargo.toml --target $1"
        for t in $(ls testcrate/tests); do
            t=${t%.rs}

            RUSTFLAGS="-C debug-assertions=no -C lto" \
            CARGO_INCREMENTAL=0 \
              $run --test $t --no-default-features --features 'mem c' --no-run
            qemu-arm-static target/${1}/debug/$t-*
	done

	for t in $(ls testcrate/tests); do
            t=${t%.rs}
            RUSTFLAGS="-C lto" \
            CARGO_INCREMENTAL=0 \
              $run --test $t --no-default-features --features 'mem c' --no-run --release
            qemu-arm-static target/${1}/release/$t-*
        done
        ;;
    *)
        run="cargo test --manifest-path testcrate/Cargo.toml --target $1"
        $run
        $run --release
        $run --features c
        $run --features c --release
        ;;
esac

PREFIX=$(echo $1 | sed -e 's/unknown-//')-
case $1 in
    armv7-*)
        PREFIX=arm-linux-gnueabihf-
        ;;
    thumb*)
        PREFIX=arm-none-eabi-
        ;;
    *86*-*)
        PREFIX=
        ;;
esac

NM=nm

if [ -d /target ]; then
    path=/target/${1}/debug/deps/libcompiler_builtins-*.rlib
else
    path=target/${1}/debug/deps/libcompiler_builtins-*.rlib
fi

# Look out for duplicated symbols when we include the compiler-rt (C) implementation
for rlib in $(echo $path); do
    set +x
    stdout=$($PREFIX$NM -g --defined-only $rlib 2>&1)

    # NOTE On i586, It's normal that the get_pc_thunk symbol appears several
    # times so ignore it
    #
    # FIXME(#167) - we shouldn't ignore `__builtin_cl` style symbols here.
    set +e
    echo "$stdout" | \
      sort | \
      uniq -d | \
      grep -v __x86.get_pc_thunk | \
      grep -v __builtin_cl | \
      grep -v __builtin_ctz | \
      grep 'T __'

    if test $? = 0; then
        exit 1
    fi
    set -ex
done

rm -f $path

# Verify that we haven't drop any intrinsic/symbol
RUSTFLAGS="-C debug-assertions=no" \
  $cargo build --features "$INTRINSICS_FEATURES" --target $1 --example intrinsics -v

# Verify that there are no undefined symbols to `panic` within our
# implementations
#
# TODO(#79) fix the undefined references problem for debug-assertions+lto
if [ -z "$DEBUG_LTO_BUILD_DOESNT_WORK" ]; then
  RUSTFLAGS="-C debug-assertions=no" \
    CARGO_INCREMENTAL=0 \
    $cargo rustc --features "$INTRINSICS_FEATURES" --target $1 --example intrinsics -- -C lto
fi
$cargo rustc --features "$INTRINSICS_FEATURES" --target $1 --example intrinsics --release -- -C lto

# Ensure no references to a panicking function
for rlib in $(echo $path); do
    set +ex
    $PREFIX$NM -u $rlib 2>&1 | grep panicking

    if test $? = 0; then
        exit 1
    fi
    set -ex
done

true