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cmake-test

|-- build
|-- CMakeLists.txt
|-- cross-compile.txt
`-- hello.cpp

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newrt@newrt-desktop:~/Documents/cmake-test/build$ cmake -DCMAKE_TOOLCHAIN_FILE=../cross-compile.txt ..
-- The C compiler identification is GNU 5.3.0
-- The CXX compiler identification is GNU 5.3.0
-- Check for working C compiler: /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-emtronix-linux-gnueabi/arm-emtronix-linux-gnueabi-gcc
-- Check for working C compiler: /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-emtronix-linux-gnueabi/arm-emtronix-linux-gnueabi-gcc -- broken
CMake Error at /usr/share/cmake-3.12/Modules/CMakeTestCCompiler.cmake:52 (message):
  The C compiler

    "/opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-emtronix-linux-gnueabi/arm-emtronix-linux-gnueabi-gcc"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /home/newrt/Documents/cmake-test/build/CMakeFiles/CMakeTmp
   
    Run Build Command:"/usr/bin/make" "cmTC_167cc/fast"
    /usr/bin/make -f CMakeFiles/cmTC_167cc.dir/build.make CMakeFiles/cmTC_167cc.dir/build
    make[1]: ����Ŀ¼��/home/newrt/Documents/cmake-test/build/CMakeFiles/CMakeTmp��
    Building C object CMakeFiles/cmTC_167cc.dir/testCCompiler.c.o
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-emtronix-linux-gnueabi/arm-emtronix-linux-gnueabi-gcc  -I/opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/cortexa9hf-neon-emtronix-linux-gnueabi/include/c++/5.3.0 -I/opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/cortexa9hf-neon-emtronix-linux-gnueabi/usr/include   -o CMakeFiles/cmTC_167cc.dir/testCCompiler.c.o   -c /home/newrt/Documents/cmake-test/build/CMakeFiles/CMakeTmp/testCCompiler.c
    Linking C executable cmTC_167cc
    /usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_167cc.dir/link.txt --verbose=1
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-emtronix-linux-gnueabi/arm-emtronix-linux-gnueabi-gcc      -rdynamic CMakeFiles/cmTC_167cc.dir/testCCompiler.c.o  -o cmTC_167cc
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find crt1.o: No such file or directory
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find crti.o: No such file or directory
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find crtbegin.o: No such file or directory
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find -lgcc
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find -lgcc_s
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find -lc
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find -lgcc
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find -lgcc_s
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find crtend.o: No such file or directory
    /opt/fsl-imx-x11/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-emtronix-linux-gnueabi/gcc/arm-emtronix-linux-gnueabi/5.3.0/real-ld: cannot find crtn.o: No such file or directory
    collect2: error: ld returned 1 exit status
    make[1]: *** [CMakeFiles/cmTC_167cc.dir/build.make:87��cmTC_167cc] ���� 1
    make[1]: �뿪Ŀ¼��/home/newrt/Documents/cmake-test/build/CMakeFiles/CMakeTmp��
    make: *** [Makefile:121��cmTC_167cc/fast] ���� 2

CMakeLists.txt ��������

project(hello)
add_executable(hello hello.cpp)

cross-compile.txt��������

#to set the toolpath variable
set(TOOLCHAIN_DIR "/opt/fsl-imx-x11/4.1.15-2.0.1/sysroots")
set(TOOLCHAIN_HOST "${TOOLCHAIN_DIR}/x86_64-pokysdk-linux/usr/bin/arm-emtronix-linux-gnueabi/arm-emtronix-linux-gnueabi")
set(TOOLCHAIN_INCLUDE
        "${TOOLCHAIN_DIR}/cortexa9hf-neon-emtronix-linux-gnueabi/usr/include"
        "${TOOLCHAIN_DIR}/cortexa9hf-neon-emtronix-linux-gnueabi/usr/include/c++/5.3.0"
   )
set(TOOLCHAIN_LIB
        "${TOOLCHAIN_DIR}/cortexa9hf-neon-emtronix-linux-gnueabi/lib"
        "${TOOLCHAIN_DIR}/cortexa9hf-neon-emtronix-linux-gnueabi/usr/lib/arm-emtronix-linux-gnueabi/5.3.0/"
        "${TOOLCHAIN_DIR}/cortexa9hf-neon-emtronix-linux-gnueabi/usr/lib"
   )
set(CMAKE_FIND_ROOT_PATH ${TOOLCHAIN_DIR}/cortexa9hf-neon-emtronix-linux-gnueabi)
#message("${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE}")

set(TOOLCHAIN_CC "${TOOLCHAIN_HOST}-gcc")
set(TOOLCHAIN_CXX "${TOOLCHAIN_HOST}-g++")

#to tell cmake it is crosscompileing
set(CMAKE_CROSSCOMPILING TRUE)

# Define name of the target system
set(CMAKE_SYSTEM_NAME "Linux")

# define the name of target architecture
set(CMAKE_SYSTEM_PROCESSOR arm)

# Define the compiler
set(CMAKE_C_COMPILER ${TOOLCHAIN_CC})
set(CMAKE_CXX_COMPILER ${TOOLCHAIN_CXX})

#to tell cmake where to search the header or lib files
#set(CMAKE_FIND_ROOT_PATH "${TOOLCHAIN_INCLUDE}" "${TOOLCHAIN_LIB}")
include_directories (
        ${TOOLCHAIN_DIR}/cortexa9hf-neon-emtronix-linux-gnueabi/include/c++/5.3.0
        ${TOOLCHAIN_DIR}/cortexa9hf-neon-emtronix-linux-gnueabi/usr/include
        )
set(CMAKE_INCLUDE_PATH
        ${TOOLCHAIN_INCLUDE} )
set(CMAKE_LIBRARY_PATH ${TOOLCHAIN_LIB} )

# 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)

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