eive-obsw/cmake/Q7SCrossCompileConfig.cmake

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# CROSS_COMPILE also needs to be set accordingly or passed to the CMake command
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if(NOT DEFINED ENV{Q7S_SYSROOT})
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# Sysroot has not been cached yet and was not set in environment either
if(NOT DEFINED SYSROOT_PATH)
message(FATAL_ERROR
"Define the Q7S_ROOTFS variable to "
"point to the raspbian rootfs."
)
endif()
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else()
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set(SYSROOT_PATH "$ENV{Q7S_SYSROOT}" CACHE PATH "Q7S root filesystem path")
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endif()
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if(NOT DEFINED ENV{CROSS_COMPILE})
set(CROSS_COMPILE "arm-linux-gnueabihf")
message(STATUS
"No CROSS_COMPILE environmental variable set, using default ARM linux "
"cross compiler name ${CROSS_COMPILE}"
)
else()
set(CROSS_COMPILE "$ENV{CROSS_COMPILE}")
message(STATUS
"Using environmental variable CROSS_COMPILE as cross-compiler: "
"$ENV{CROSS_COMPILE}"
)
endif()
message(STATUS "Using sysroot path: ${SYSROOT_PATH}")
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set(CROSS_COMPILE_CC "${CROSS_COMPILE}-gcc")
set(CROSS_COMPILE_CXX "${CROSS_COMPILE}-g++")
set(CROSS_COMPILE_LD "${CROSS_COMPILE}-ld")
set(CROSS_COMPILE_AR "${CROSS_COMPILE}-ar")
set(CROSS_COMPILE_RANLIB "${CROSS_COMPILE}-ranlib")
set(CROSS_COMPILE_STRIP "${CROSS_COMPILE}-strip")
set(CROSS_COMPILE_NM "${CROSS_COMPILE}-nm")
set(CROSS_COMPILE_OBJCOPY "${CROSS_COMPILE}-objcopy")
set(CROSS_COMPILE_SIZE "${CROSS_COMPILE}-size")
# At the very least, cross compile gcc and g++ have to be set!
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find_program (CMAKE_C_COMPILER ${CROSS_COMPILE_CC} REQUIRED)
find_program (CMAKE_CXX_COMPILER ${CROSS_COMPILE_CXX} REQUIRED)
# Useful utilities, not strictly necessary
find_program(CMAKE_SIZE ${CROSS_COMPILE_SIZE})
find_program(CMAKE_OBJCOPY ${CROSS_COMPILE_OBJCOPY})
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set(CMAKE_CROSSCOMPILING TRUE)
set(CMAKE_SYSROOT "${SYSROOT_PATH}")
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# Define name of the target system
set(CMAKE_SYSTEM_NAME "Linux")
set(CMAKE_SYSTEM_PROCESSOR "armv7")
# Define the compiler
set(CMAKE_C_COMPILER ${CROSS_COMPILE_CC})
set(CMAKE_CXX_COMPILER ${CROSS_COMPILE_CXX})
# List of library dirs where LD has to look. Pass them directly through gcc.
set(LIB_DIRS
"${SYSROOT_PATH}/usr/include"
"${SYSROOT_PATH}/usr/include/linux"
"${SYSROOT_PATH}/usr/lib"
"${SYSROOT_PATH}/lib"
"${SYSROOT_PATH}"
"${SYSROOT_PATH}/usr/lib/arm-xiphos-linux-gnueabi"
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)
# You can additionally check the linker paths if you add the
# flags ' -Xlinker --verbose'
set(COMMON_FLAGS "-I${SYSROOT_PATH}/usr/lib")
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foreach(LIB ${LIB_DIRS})
set(COMMON_FLAGS "${COMMON_FLAGS} -L${LIB} -Wl,-rpath-link,${LIB}")
endforeach()
set(CMAKE_PREFIX_PATH
"${CMAKE_PREFIX_PATH}"
# "${SYSROOT_PATH}/usr/lib/${CROSS_COMPILE}"
)
set(CMAKE_C_FLAGS
"-mcpu=cortex-a9 -mfpu=neon-vfpv3 -mfloat-abi=hard ${COMMON_FLAGS} -lgpiod"
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CACHE STRING "C flags for Q7S"
)
set(CMAKE_CXX_FLAGS
"${CMAKE_C_FLAGS}"
CACHE STRING "CPP flags for Q7S"
)
# 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)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)