ncnn/toolchains/host.gcc.toolchain.cmake

# set cross-compiled system type, it's better not use the type which cmake cannot recognized.
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR x86)
# if gcc/g++ was installed:
set(CMAKE_C_COMPILER "gcc")
set(CMAKE_CXX_COMPILER "g++")

# set searching rules
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_C_FLAGS} and ${CMAKE_CXX_FLAGS}flag
set(CMAKE_CXX_FLAGS "-std=c++11 ${CMAKE_CXX_FLAGS}")