set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)

# 工具链前缀（arm-molv2-linux-uclibcgnueabi 等）
set(CROSS arm-molv2-linux-uclibcgnueabi)

# 指定编译器
set(CMAKE_C_COMPILER   ${CROSS}-gcc)
set(CMAKE_CXX_COMPILER ${CROSS}-g++)

# 指定 sysroot，让 gcc 自动 -I 与 -L
set(CMAKE_SYSROOT $ENV{SYSROOT})
#set(CMAKE_C_FLAGS "--sysroot=${CMAKE_SYSROOT} -DFD_SETSIZE=4096" CACHE STRING "")
#set(CMAKE_CXX_FLAGS "--sysroot=${CMAKE_SYSROOT} -DFD_SETSIZE=4096" CACHE STRING "")

# 让 find_library/Path/Search 都优先 sysroot
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)

# 生成的可执行文件不要带 rpath
set(CMAKE_SKIP_RPATH TRUE)

# 如需静态链接取消下一行注释
#set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static")