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# ─── RISC-V 64 Bare-Metal Toolchain File ─────────────────────────────────────────
#
# Usage: cmake -B build_sw -DCMAKE_TOOLCHAIN_FILE=tools/toolchain-riscv64.cmake
#
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR riscv64)
# ─── Toolchain binaries ─────────────────────────────────────────────────────────
set(CROSS_PREFIX "riscv64-unknown-elf-" CACHE STRING "Cross compiler prefix")
set(CMAKE_C_COMPILER ${CROSS_PREFIX}gcc)
set(CMAKE_CXX_COMPILER ${CROSS_PREFIX}g++)
set(CMAKE_ASM_COMPILER ${CROSS_PREFIX}gcc)
set(CMAKE_OBJCOPY ${CROSS_PREFIX}objcopy)
set(CMAKE_OBJDUMP ${CROSS_PREFIX}objdump)
set(CMAKE_SIZE ${CROSS_PREFIX}size)
# ─── Architecture flags ─────────────────────────────────────────────────────────
set(RISCV_ARCH "rv64ima" CACHE STRING "RISC-V ISA string")
set(RISCV_ABI "lp64" CACHE STRING "RISC-V ABI")
set(CMAKE_C_FLAGS_INIT "-march=${RISCV_ARCH} -mabi=${RISCV_ABI} -nostdlib -ffreestanding -fno-builtin -mcmodel=medany")
set(CMAKE_CXX_FLAGS_INIT "${CMAKE_C_FLAGS_INIT} -fno-exceptions -fno-rtti")
set(CMAKE_ASM_FLAGS_INIT "-march=${RISCV_ARCH} -mabi=${RISCV_ABI}")
set(CMAKE_EXE_LINKER_FLAGS_INIT "-nostartfiles -static -Wl,--gc-sections")
# ─── Search paths ───────────────────────────────────────────────────────────────
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
# ─── Disable compiler checks (bare-metal can't run test binaries) ────────────────
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
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