Re: [PATCH] cmake.bbclass: set ar/ld/nm/objcopy/objdump/ranlib/strip native paths

[Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>]

Am 17.07.2013 12:57, schrieb Jonathan Liu:
> On 17/07/2013 7:49 PM, Jonathan Liu wrote:
>> On 17/07/2013 7:13 PM, Stefan Herbrechtsmeier wrote:
>>> Am 17.07.2013 10:40, schrieb Jonathan Liu:
>>>> The CMAKE_{AR,LINKER,NM,OBJCOPY,OBJDUMP,RANLIB,STRIP} cmake variables
>>>> are currently set to values like CMAKE_LINKER-NOTFOUND for native
>>>> recipes because the host paths are not searched. This is because the
>>>> CMAKE_FIND_ROOT_PATH_MODE_PROGRAM cmake variable is set to ONLY.
>>>>
>>>> To resolve this, explicitly set the variables using FIND_PROGRAM and
>>>> pass the CMAKE_FIND_ROOT_PATH_BOTH option so the host paths are also
>>>> searched.
>>> Can you please debug the issue. Regarding my current check the 
>>> variables are set in CMakeFindBinUtils.cmake and this is included by 
>>> CMakeDetermineCCompiler.cmake. The later set 
>>> _CMAKE_TOOLCHAIN_LOCATION based on the CMAKE_C_COMPILER variable and 
>>> this is used as search location for the find_program calls. Can you 
>>> check the value of _CMAKE_TOOLCHAIN_LOCATION?
>>>
>> Within the context of the CMakeLists.txt file:
>> CMAKE_C_COMPILER is /usr/bin/gcc.
>> _CMAKE_TOOLCHAIN_LOCATION is not set to anything.
>>
>> If I add message(test) to 
>> build/tmp/sysroots/x86_64-linux/usr/share/cmake-2.8/Modules/CMakeDetermineCCompiler.cmake, 
>> it doesn't get printed out when running cmake on CMakeLists.txt 
>> (cmake is build/tmp/sysroots/x86_64-linux/usr/bin/cmake).
>>
>> Regards,
>> Jonathan
> For:
> find_program(CMAKE_AR NAMES 
> ${_CMAKE_TOOLCHAIN_PREFIX}ar${_CMAKE_TOOLCHAIN_SUFFIX} HINTS 
> ${_CMAKE_TOOLCHAIN_LOCATION})
>
> It seems the ${_CMAKE_TOOLCHAIN_LOCATION} hint is not used when 
> CMAKE_FIND_ROOT_PATH_MODE_PROGRAM is set to ONLY.
You are right. The CMAKE_FIND_ROOT_PATH is used also as base for the 
HINTS paths.

You can use _CMAKE_TOOLCHAIN_LOCATION to pass NO_CMAKE_FIND_ROOT_PATH to 
the find_program calls:
set(_CMAKE_TOOLCHAIN_LOCATION "" NO_CMAKE_FIND_ROOT_PATH)

This should work but I am not sure if it is a good solution.