riscv64.toolchain.cmake

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR riscv64)

set(CMAKE_C_COMPILER riscv64-linux-gnu-gcc)
set(CMAKE_CXX_COMPILER riscv64-linux-gnu-g++)

set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
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)

# Workaround for "undefined reference to `__atomic_compare_exchange_1'": https://stackoverflow.com/a/21144496/6548453
set(RISCV_LINKER_FLAGS "-Wl,--no-as-needed -latomic")
set(CMAKE_SHARED_LINKER_FLAGS "${RISCV_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}")
set(CMAKE_MODULE_LINKER_FLAGS "${RISCV_LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS}")
set(CMAKE_EXE_LINKER_FLAGS    "${RISCV_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}")