title: Whether does cmake work on cross-compiler Linaro chain?
body: <p>I have a C project, which supports many platforms. Its generator has Borland
   Makefiles, NMake Makefiles, MSVC 6, 7, 8, 9, 11, Eclipse CDT4 ‐ Unix
   Makefiles etc. I have generated MSVC 9 solution with cmake on Windows 7. It
   is OK.</p>
  
  <p>Now, I would like to generate ARM Cortex A8 project on TI Sitara SDK, of the
   above C project. The TI Sitara SDK is installed on Ubuntu 14.04 OS host
   computer. There is a cross-compiling tool chain: Linaro on Ubuntu PC.</p>
  
  <p>From the original C project document, it looks like below selection is
   appropriate for Sitara SDK because it uses Eclipse (but it has 8.1.1 on its
   help window, higher than CDT4)</p>
  
  <pre><code>Eclipse CDT4 ‐ Unix Makefiles
                                = Generates Eclipse CDT 4.0 project files.
  </code></pre>
  
  <p>I have set compiler path:</p>
  
  <pre><code>export CMAKE_C_COMPILER=/home/u64rj/ti-processor-sdk-linux-am335x-evm-01.00.00.03/linux-devkit/sysroots/i686-arago-linux/usr/bin/arm-linux-gnueabihf-gcc
  
  export CMAKE_ECLIPSE_VERSION=4.2
  </code></pre>
  
  <p>When I run cmake, there are still such errors:</p>
  
  <pre><code>u64rj@u64rj-MS-7696:~/u64rj-Fixed/sdk-2-src$ cmake -G "Eclipse CDT4 - Unix Makefiles" -DBUILD=LINUX-ARMv7a -DCFG=Debug -DMATH=I32
  -- CMAKE SCRIPTS VERSION 1.1.1.0
  CMake Error at /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:90 (file):
    file Internal CMake error when trying to open file:
    /home/u64rj-Fixed/sdk-2-src/CMakeFiles/2.8.12.2/CompilerIdC/CMakeCCompilerId.c
    for writing.
  Call Stack (most recent call first):
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:100 (CMAKE_DETERMINE_COMPILER_ID_WRITE)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:39 (CMAKE_DETERMINE_COMPILER_ID_BUILD)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCCompiler.cmake:131 (CMAKE_DETERMINE_COMPILER_ID)
    common-build/cmake/sdk-project-include.cmake:1189 (project)
    CMakeLists.txt:4 (SDK_PROJECT)
  
  
  CMake Error at /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:90 (file):
    file Internal CMake error when trying to open file:
    /home/u64rj-Fixed/sdk-2-src/CMakeFiles/2.8.12.2/CompilerIdC/CMakeCCompilerId.c
    for writing.
  Call Stack (most recent call first):
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:100 (CMAKE_DETERMINE_COMPILER_ID_WRITE)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:39 (CMAKE_DETERMINE_COMPILER_ID_BUILD)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCCompiler.cmake:131 (CMAKE_DETERMINE_COMPILER_ID)
    common-build/cmake/sdk-project-include.cmake:1189 (project)
    CMakeLists.txt:4 (SDK_PROJECT)
  
  
  CMake Error at /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:90 (file):
    file Internal CMake error when trying to open file:
    /home/u64rj-Fixed/sdk-2-src/CMakeFiles/2.8.12.2/CompilerIdC/CMakeCCompilerId.c
    for writing.
  Call Stack (most recent call first):
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:100 (CMAKE_DETERMINE_COMPILER_ID_WRITE)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:39 (CMAKE_DETERMINE_COMPILER_ID_BUILD)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCCompiler.cmake:131 (CMAKE_DETERMINE_COMPILER_ID)
    common-build/cmake/sdk-project-include.cmake:1189 (project)
    CMakeLists.txt:4 (SDK_PROJECT)
  
  
  -- The C compiler identification is unknown
  CMake Error at /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:90 (file):
    file Internal CMake error when trying to open file:
    /home/u64rj-Fixed/sdk-2-src/CMakeFiles/2.8.12.2/CompilerIdCXX/CMakeCXXCompilerId.cpp
    for writing.
  Call Stack (most recent call first):
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:100 (CMAKE_DETERMINE_COMPILER_ID_WRITE)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:39 (CMAKE_DETERMINE_COMPILER_ID_BUILD)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCXXCompiler.cmake:127 (CMAKE_DETERMINE_COMPILER_ID)
    common-build/cmake/sdk-project-include.cmake:1189 (project)
    CMakeLists.txt:4 (SDK_PROJECT)
  
  
  CMake Error at /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:90 (file):
    file Internal CMake error when trying to open file:
    /home/u64rj-Fixed/sdk-2-src/CMakeFiles/2.8.12.2/CompilerIdCXX/CMakeCXXCompilerId.cpp
    for writing.
  Call Stack (most recent call first):
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:100 (CMAKE_DETERMINE_COMPILER_ID_WRITE)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCompilerId.cmake:39 (CMAKE_DETERMINE_COMPILER_ID_BUILD)
    /usr/share/cmake-2.8/Modules/CMakeDetermineCXXCompiler.cmake:127 (CMAKE_DETERMINE_COMPILER_ID)
    common-build/cmake/sdk-project-include.cmake:1189 (project)
    CMakeLists.txt:4 (SDK_PROJECT)
  
  
  -- The CXX compiler identification is unknown
  -- Could not determine Eclipse version, assuming at least 3.6 (Helios). Adjust CMAKE_ECLIPSE_VERSION if this is wrong.
  -- Check for working C compiler: /home/u64rj-Fixed/sdk-2-src/arm-linux-gnueabihf-gcc
  CMake Error: your C compiler: "/home/u64rj-Fixed/sdk-2-src/arm-linux-gnueabihf-gcc" was not found.   Please set CMAKE_C_COMPILER to a valid compiler path or name.
  CMake Error: Internal CMake error, TryCompile configure of cmake failed
  -- Check for working C compiler: /home/u64rj-Fixed/sdk-2-src/arm-linux-gnueabihf-gcc -- broken
  CMake Error at /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:61 (message):
    The C compiler
    "/home/u64rj-Fixed/sdk-2-src/arm-linux-gnueabihf-gcc"
    is not able to compile a simple test program.
  
    It fails with the following output:
  
  
  
  
  
    CMake will not be able to correctly generate this project.
  Call Stack (most recent call first):
    common-build/cmake/sdk-project-include.cmake:1189 (project)
    CMakeLists.txt:4 (SDK_PROJECT)
  
  
  CMake Error: your C compiler: "/home/u64rj-Fixed/sdk-2-src/arm-linux-gnueabihf-gcc" was not found.   Please set CMAKE_C_COMPILER to a valid compiler path or name.
  CMake Error: your CXX compiler: "/home/u64rj-Fixed/sdk-2-src/arm-linux-gnueabihf-g++" was not found.   Please set CMAKE_CXX_COMPILER to a valid compiler path or name.
  -- Configuring incomplete, errors occurred!
  See also "/home/u64rj-Fixed/sdk-2-src/CMakeFiles/CMakeOutput.log".
  See also "/home/u64rj-Fixed/sdk-2-src/CMakeFiles/CMakeError.log".
  u64rj@u64rj-MS-7696:~/u64rj-Fixed/sdk-2-src$ 
  </code></pre>
  
  <p>ARMv7a is the architecture in the build of chip TI Sitara AM3358.</p>
  
  <p>I don't know why it searches cross-compiler at the C project path:
      CMake Error: your C compiler: "/home/u64rj-Fixed/sdk-2-src/arm-linux-gnueabihf-gcc" was not found.   Please set CMAKE_C_COMPILER to a valid compiler path or name.
      CMake Error: Internal CMake error, TryCompile configure of cmake failed
      -- Check for working C compiler: /home/u64rj-Fixed/sdk-2-src/arm-linux-gnueabihf-gcc -- broken</p>
  
  <p>even though the cross-compiler of the tool chain is given by export CMAKE_C_COMPILER=/home/u64rj/ti-processor-sdk-linux-am335x-evm-01.00.00.03/linux-devkit/sysroots/i686-arago-linux/usr/bin/arm-linux-gnueabihf-gcc</p>
  
  <p>Thanks, </p>