# --- T2-COPYRIGHT-NOTE-BEGIN ---
# T2 SDE: package/*/rustc/parse-config
# Copyright (C) 2004 - 2024 The T2 SDE Project
# 
# This Copyright note is generated by scripts/Create-CopyPatch,
# more information can be found in the files COPYING and README.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2.
# --- T2-COPYRIGHT-NOTE-END ---

export CARGO_HOME="$base/build/$SDECFG_ID/TOOLCHAIN/.cargo" # $toolsdir/" # "$builddir/.cargo"
var_append FLWRAPPER_FILTERDIR ':' "$CARGO_HOME"
export RUSTFLAGS=""

rust_target=${arch_target}

cargo_clear_cksum() {
	sed -i 's/\("files":{[^,]*\),[^}]*}/\1}/' "$@"
}

declare -A rust_t2_targets
rust_t2_targets[armv5te-unknown-linux-gnueabihf]=armv5te-unknown-linux-gnueabi
rust_t2_targets[armv6-unknown-linux-gnueabihf]=arm-unknown-linux-gnueabihf
rust_t2_targets[armv6eb-unknown-linux-gnueabi]=armeb-unknown-linux-gnueabi
rust_t2_targets[armv6eb-unknown-linux-gnueabihf]=armeb-unknown-linux-gnueabi
rust_t2_targets[mips64-unknown-linux-gnuabin32]=mips64-unknown-linux-gnuabi64
rust_t2_targets[riscv32-unknown-linux-gnu]=riscv32gc-unknown-linux-gnu
rust_t2_targets[riscv32-unknown-linux-musl]=riscv32gc-unknown-linux-musl
rust_t2_targets[riscv64-unknown-linux-gnu]=riscv64gc-unknown-linux-gnu
rust_t2_targets[riscv64-unknown-linux-musl]=riscv64gc-unknown-linux-musl
rust_t2_targets[sparcv7-unknown-linux-gnu]=sparc-unknown-linux-gnu
rust_t2_targets[sparcv8-unknown-linux-gnu]=sparc-unknown-linux-gnu
rust_t2_targets[sparcv9-unknown-linux-gnu]=sparc-unknown-linux-gnu
rust_t2_targets[sparcv9b-unknown-linux-gnu]=sparc-unknown-linux-gnu

rust_update_arch_target() {
  # return early, if supplied with unexpanded argument
  [ ! -e "$1" ] && return

  # override some not widely support to match more often, e.g. atomics
  rust_t2_targets[sparcv7-unknown-linux-gnu]=powerpc-unknown-linux-gnu
  rust_t2_targets[sparcv8-unknown-linux-gnu]=powerpc-unknown-linux-gnu
  rust_t2_targets[sparcv9-unknown-linux-gnu]=powerpc-unknown-linux-gnu
  rust_t2_targets[sparcv9b-unknown-linux-gnu]=powerpc-unknown-linux-gnu

  for f; do
    cp -vf "$f" "$f.orig"
    # add all t2 extra rustc target
    for a in "${!rust_t2_targets[@]}"; do
	local b=${rust_t2_targets[$a]}
       sed -i "/\"$b\"/{p; s/$b/$a/; s/${b//-/_}/${a//-/_}/}" "$f"
    done

    sed -i "/\"${rust_target/-t2-/-unknown-}\"/ {p; s/unknown/t2/g}" "$f"
    #diff -u "$f.orig" "$f" || true
  done                                                                                                       
}

cargo_vendor() {
	cargo vendor vendor

	mkdir -p .cargo
	cat > .cargo/config.toml <<-EOT
[source.crates-io]
replace-with = "vendored-sources"

[source.vendored-sources]
directory = "vendor"
EOT

	# update known instances of arch_targets
	rust_update_arch_target vendor/*/no_atomic*.rs

	cargo_clear_cksum vendor/*/.cargo-checksum.json
}

if [ $stagelevel -gt 1 -a $pkg != rustc ]; then

    # TODO: maybe use a rustc wrapper in the future, too

    cflags="-mcpu= $GCC_WRAPPER_INSERT $GCC_WRAPPER_APPEND"
    mcpu="${cflags##*-mcpu=}" mcpu="${mcpu%% *}"
    if [ ! "$mcpu" ]; then
	cflags="-march= $GCC_WRAPPER_INSERT $GCC_WRAPPER_APPEND"
	mcpu="${cflags##*-march=}" mcpu="${mcpu%% *}"
    fi

    # translate our gcc based configs, to those supported by llvm
    case "$mcpu" in
	# ARM optional features
	armv*) mcpu= ;;
	*+*)
		# TODO: -C target-feature=
		mcpu=${mcpu%%+*}
		;;
	# PPC
	cell) mcpu=970 ;;
	power[0-9]*) mcpu=${mcpu/power/pwr} ;;
	# MIPS
	r[568]000|r[1246]0000) mcpu=mips4 ;;
	# x86
	esther) mcpu=c3-2 ;;
    esac
    [ "$mcpu" ] && var_append RUSTFLAGS " " "-C target-cpu=$mcpu"

    unset cflags mcpu

    case "$SDECFG_OPT" in
    none|debug)
	var_append RUSTFLAGS " " "-C opt-level=0" ;;
    lazy)
	var_append RUSTFLAGS " " "-C opt-level=1" ;;
    size|smart*)
	var_append RUSTFLAGS " " "-C opt-level=s" ;;
    smaller)
	var_append RUSTFLAGS " " "-C opt-level=z" ;;
    fast*)
	var_append RUSTFLAGS " " "-C opt-level=3" ;;
    *)
	var_append RUSTFLAGS " " "-C opt-level=2" ;;
    esac
fi