# Copyright (c) 2026 Eclipse ThreadX contributors
# SPDX-License-Identifier: MIT
# Portions of this file were generated with AI assistance.
#
# Toolchain file for Arm Cortex-R52 (Armv8-R, AArch32) using GNU tools.

# Name of the target
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR cortex-r52)

set(THREADX_ARCH "cortex_r52")
set(THREADX_TOOLCHAIN "gnu")

# Floating-point ABI.  Cortex-R52 always implements at least a single-precision
# FPU -- GCC rejects "+nofp" for this core and offers only "+nofp.dp" (drop
# double precision).  There is therefore no FPU-less R52, so the soft-float
# baseline selects the soft *ABI* rather than removing the FPU.  The hard-float
# variant with lazy VFP context save arrives with AR1 milestone M5.
if(NOT DEFINED TX_R52_FLOAT_ABI)
    set(TX_R52_FLOAT_ABI "soft" CACHE STRING "R52 float ABI: soft | hard")
endif()

set(MCPU_FLAGS "-marm -mcpu=cortex-r52")
if(TX_R52_FLOAT_ABI STREQUAL "hard")
    set(VFP_FLAGS "-mfpu=fpv5-d16 -mfloat-abi=hard")
else()
    set(VFP_FLAGS "-mfloat-abi=soft")
endif()
set(SPEC_FLAGS "--specs=nosys.specs")

include(${CMAKE_CURRENT_LIST_DIR}/arm-none-eabi.cmake)

# Pin the project's reference cross toolchain, GCC 14 for Arm.  An absolute
# path is used deliberately, so that a build on a machine which has it does not
# depend on PATH ordering.  Override with -DARM_TOOLCHAIN_PATH=<dir containing
# arm-none-eabi-gcc> to build with a different compiler -- for example the
# advisory newest-compiler lane.
#
# The default below serves local builds and nothing else.  It fires only on a
# machine that already has that directory, and no CI job does: the workflows
# unpack the toolchain into the workspace and put it on PATH, and
# scripts/check_gcc.sh passes -DARM_TOOLCHAIN_PATH at every CMake call site.
# On a runner the EXISTS check therefore falls through and the compiler comes
# from PATH.  Do not read the default as something CI depends on -- and do not
# remove it as dead code either, because it is what makes a no-flag build work
# on a developer machine.
if(NOT DEFINED ARM_TOOLCHAIN_PATH)
    set(ARM_TOOLCHAIN_PATH
        "$ENV{HOME}/toolchains/arm-gnu-toolchain-14.3.rel1-x86_64-arm-none-eabi/bin")
endif()
if(EXISTS "${ARM_TOOLCHAIN_PATH}/arm-none-eabi-gcc")
    set(CMAKE_C_COMPILER   "${ARM_TOOLCHAIN_PATH}/arm-none-eabi-gcc")
    set(CMAKE_CXX_COMPILER "${ARM_TOOLCHAIN_PATH}/arm-none-eabi-g++")
    set(CMAKE_ASM_COMPILER "${ARM_TOOLCHAIN_PATH}/arm-none-eabi-gcc")
endif()