# More on cross-compilation: https://cmake.org/cmake/help/latest/manual/cmake-toolchains.7.html

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_SYSTEM_VERSION 1)

IF (NOT CMAKE_C_COMPILER OR NOT CMAKE_CXX_COMPILER)
	SET(CMAKE_C_COMPILER arm-linux-gnueabihf-gcc)
	SET(CMAKE_CXX_COMPILER arm-linux-gnueabihf-g++)
ENDIF()

# os tools
foreach(tool echo grep rm mkdir nm cp touch make unzip)
	string(TOUPPER ${tool} TOOL)
	find_program(${TOOL} ${tool})
	if(NOT ${TOOL})
		message(FATAL_ERROR "could not find ${TOOL}")
	endif()
endforeach()

FIND_PROGRAM(STRIP_TOOL "arm-linux-gnueabihf-strip")

set(CMAKE_EXE_LINKER_FLAGS "-Wl,-gc-sections")
#set(CMAKE_C_FLAGS ${C_FLAGS})
#set(CMAKE_CXX_LINKER_FLAGS ${C_FLAGS})

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)