# Copyright 2021 The Android KVM Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Find the toolchain path for the current OS.
UNNAME_S := $(shell uname -s | tr '[:upper:]' '[:lower:]')
TOOLCHAIN_arm64_clang := $(ROOT_DIR)/toolchains/$(UNNAME_S)-x86/clang/clang-r416183b
TOOLCHAIN_arm64_gcc-5.1 := $(ROOT_DIR)/toolchains/$(UNNAME_S)-x86/gcc/aarch64-linux-gnu-5.1
TOOLCHAIN_arm64_gcc-9.2 := $(ROOT_DIR)/toolchains/$(UNNAME_S)-x86/gcc/aarch64-linux-gnu-9.2

# Set the toolchain build binary paths and prefixes.
TARGET_arm64_clang := aarch64-linux-gnu
TARGET_arm64_gcc-5.1 := aarch64-linux-gnu
TARGET_arm64_gcc-9.2 := aarch64-none-linux-gnu

#
# $(1): toolchain name
# $(2): toolchain variables' prefix
#
define define_toolchain
    $(2)TOOLCHAIN_IS_LEGACY := 0
    $(2)TOOLCHAIN_IS_LLVM := 0

    ifeq ($(1), gcc-5.1)
        $(2)TOOLCHAIN_IS_LEGACY := 1
    else ifeq ($(1), gcc-9.2)
    else ifeq ($(1), clang)
        $(2)TOOLCHAIN_IS_LLVM := 1
    else
        $$(error Unrecognized toolchain: $(1))
    endif

    $(2)TOOLCHAIN_BIN :=    $(TOOLCHAIN_$(ARCH)_$(1))/bin
    $(2)TARGET :=           $(TARGET_$(ARCH)_$(1))

    ifeq ($$($(2)TOOLCHAIN_IS_LLVM),1)
        $(2)CC :=           $$($(2)TOOLCHAIN_BIN)/clang
        $(2)LD :=           $$($(2)TOOLCHAIN_BIN)/ld.lld
        $(2)OBJCOPY :=      $$($(2)TOOLCHAIN_BIN)/llvm-objcopy
        $(2)OBJDUMP :=      $$($(2)TOOLCHAIN_BIN)/llvm-objdump
    else
        $(2)CC :=           $$($(2)TOOLCHAIN_BIN)/$$($(2)TARGET)-gcc
        $(2)LD :=           $$($(2)TOOLCHAIN_BIN)/$$($(2)TARGET)-ld
        $(2)OBJCOPY :=      $$($(2)TOOLCHAIN_BIN)/$$($(2)TARGET)-objcopy
        $(2)OBJDUMP :=      $$($(2)TOOLCHAIN_BIN)/$$($(2)TARGET)-objdump
    endif
endef