cmake cross compile toolchain files

aarch64.cmake

# this one is important
SET(CMAKE_SYSTEM_NAME Linux)
SET(SYSTEM_NAME aarch64-linux-gnu)
#this one not so much
SET(CMAKE_SYSTEM_VERSION 1)

# specify the cross compiler
SET(CMAKE_C_COMPILER   ${SYSTEM_NAME}-gcc)
SET(CMAKE_CXX_COMPILER ${SYSTEM_NAME}-g++)

# where is the target environment
SET(CMAKE_FIND_ROOT_PATH  /usr/${SYSTEM_NAME})

# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

armel.cmake

# this one is important
SET(CMAKE_SYSTEM_NAME Linux)
SET(SYSTEM_NAME arm-linux-gnueabi)
#this one not so much
SET(CMAKE_SYSTEM_VERSION 1)

# specify the cross compiler
SET(CMAKE_C_COMPILER   ${SYSTEM_NAME}-gcc)
SET(CMAKE_CXX_COMPILER ${SYSTEM_NAME}-g++)

# where is the target environment
SET(CMAKE_FIND_ROOT_PATH  /usr/${SYSTEM_NAME})

# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

armhf.cmake

# this one is important
SET(CMAKE_SYSTEM_NAME Linux)
SET(SYSTEM_NAME arm-linux-gnueabihf)
#this one not so much
SET(CMAKE_SYSTEM_VERSION 1)

# specify the cross compiler
SET(CMAKE_C_COMPILER   ${SYSTEM_NAME}-gcc)
SET(CMAKE_CXX_COMPILER ${SYSTEM_NAME}-g++)

# where is the target environment
SET(CMAKE_FIND_ROOT_PATH  /usr/${SYSTEM_NAME})

# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)