[CMake] Cross-compiling: Cmake compiler and ABI check don´t work / TRY_COMPILE and EXECUTABLE_SUFFIX problem

[David Cole]

On Mon, Feb 21, 2011 at 2:14 AM, Schmid Alexander <A.Schmid at de.ccv.eu> wrote:
> On Friday 18 February 2011, Schmid Alexander wrote:
>> Hi,
>>
>> of course, I´d like to have you think further about it, so here you go...
>
> ;-)
>
>> This is the toolchain file I use.
>> The specialty about is that I want to use the ARMCC as compiler and an
>> SDK-provided linker tool for linking.
>>
>> # this one is important
>> SET( CMAKE_SYSTEM_NAME Generic )
>> # this one not so much
>> SET( CMAKE_SYSTEM_VERSION 1 )
>>
>> #
>> ---------------------------------------------------------------------------
>>------ # setup local variables used
>> #
>> ---------------------------------------------------------------------------
>>------
>>
>> SET( SDK1_ROOT "$ENV{PROJ_ROOT}\\tools\\Sdk1" )
>> message( STATUS "The SDK1 can be found at ${SDK1_ROOT}" )
>> SET( SDK1_INCLUDE "${SDK1_ROOT}/include" )
>> STRING( REPLACE "\\" "/" SDK1_INCLUDE ${SDK1_INCLUDE} )
>> SET( SDK1_LIB "${SDK1_ROOT}/lib" )
>> STRING( REPLACE "\\" "/" SDK1_LIB ${SDK1_LIB} )
>>
>> SET( SDK2_ROOT "$ENV{PROJ_ROOT}\\tools\\Sdk2" )
>> message( STATUS "The SDK2 can be found at ${SDK2_ROOT}" )
>> SET( SDK2_INCLUDE "${SDK2_ROOT}/include" )
>> STRING( REPLACE "\\" "/" SDK2_INCLUDE ${SDK2_INCLUDE} )
>> SET( SDK2_LIB "${SDK2_ROOT}/lib" )
>> STRING( REPLACE "\\" "/" SDK2_LIB ${SDK2_LIB} )
>>
>> SET( RVCT40_BIN "$ENV{RVCT40BIN}" )
>> message( STATUS "The ARM Tools can be found at ${RVCT40_BIN}" )
>
>
> Does it work if you replace the all the $ENV{}s with hardcoded paths ?
> Please try that and let me know if it works then, so we can figure out a
> solution.
>
> Alex
>
>
>>>>
>
> Hi Alex,
>
> replacing doesn´t work.
> I also did some further investigation and it led me to a different problem, that may be the reason for all this.
>
> I think that the TRY_COMPILE macro of Cmake does not respect the CMAKE_EXECUTABLE_SUFFIX that I have set to ".out".
> So the TRY_COMPILE does not find the correctly built output file and further processing fails.
>
> Here´s the output of CMAKE:
> -- Check for working CXX compiler: C:/Programme/ARM/RVCT/Programs/4.0/436/multi1/win_32-pentium/armcc.exe
> -- Check for working CXX compiler: C:/Programme/ARM/RVCT/Programs/4.0/436/multi1/win_32-pentium/armcc.exe -- works
> -- Detecting CXX compiler ABI info
> CMake Error: Could not COPY_FILE.
>  OutputFile: ''
>    copyFile: 'D:/proj/build/test2/CMakeFiles/CMakeDetermineCompilerABI_CXX.bin'
>
> Unable to find executable for try_compile: tried "D:/proj/build/test2/CMakeFiles/CMakeTmp/cmTryCompileExec" and "D:/proj/build
> /test2/CMakeFiles/CMakeTmp/Debug/cmTryCompileExec" and "D:/proj/build/test2/CMakeFiles/CMakeTmp/Development/cmTryCompileExec".
>
> -- Suffix is:
> -- Output is:
>
> As you can see, I manually added the last to MESSAGEs to the CmakeDetermineCompilerAbi.cmake that was shipped with Cmake 2.8.3.
>
> When I add the line
> SET( CMAKE_EXECUTABLE_SUFFIX .out )
> In that file, the ABI check seems to work. So the big question is how to make Cmake use the CMAKE_EXECUTABLE_SUFFIX that was given in the toolchain file?
>
> Regards,
> Alex
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.cmake.org/mailman/listinfo/cmake
>

CMAKE_EXECUTABLE_SUFFIX is not intended to be "settable"... That's
completely unexpected from the CMake development team's point of view.
I'm not surprised that it doesn't work.

Why do you need to set it?