[OE-core] [PATCH v3 2/2] cmake: Upgrade 2.8.12.2 -> 3.2.2

[Stefan Herbrechtsmeier]

Am 17.06.2015 um 16:47 schrieb Moritz Blume:
> On 11.06.2015 21:10, Stefan Herbrechtsmeier wrote:
>> Am 10.06.2015 um 09:36 schrieb Moritz Blume:
>>> Patches "qt4-fail-silent.patch" and "support-oe-qt4-tools-names.patch"
>>> were adapted in order to fit to CMake 3.2.2 (refer to the commit
>>> message in the respective patch for details).
>>> Patch "cmake-2.8.11.2-FindFreetype.patch" was dropped since it was
>>> rejected upstream and its functionality otherwise implemented in the
>>> meantime.
>>>
>>> Note that CMake 3 needs to have the full compiler path in the toolchain
>>> file (see cmake.bbclass).
>> Why is the full path needed?
>
> https://public.kitware.com/Bug/view.php?id=15251
>
> "Having a full path to the compiler is a new requirement starting in 
> CMake 3.0. The incompatibility was introduced across a major version 
> number bump and is considered acceptable. The project will have to be 
> fixed to use a full path."
The documentions [1] says something else:
The CMAKE_<LANG>_COMPILER variables may be set to full paths, or to 
names of compilers to search for in standard locations

> Without a full path, you get the following error message:
>
> CMake Error at CMakeLists.txt:5 (project):
> | The CMAKE_C_COMPILER:
> |
> | gcc
> |
> | is not a full path and was not found in the PATH.
> |
> | Tell CMake where to find the compiler by setting either the environment
> | variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full 
> path to
> | the compiler, or to the compiler name if it is in the PATH.
>
But this messages also says that the compiler was not found in the PATH.

>>
>> Have you try to add STAGING_BINDIR_TOOLCHAIN to the 
>> CMAKE_FIND_ROOT_PATH?
>
> I don't understand, is this related to the compiler path?
Yes, but this doesn't helps as CMAKE_<LAND>_COMPILER is not inside a 
/bin path. CMake use find_program to get the full path in 
Modules/CMakeDetermineCompiler.cmake.

<snip>

[1] 
http://www.cmake.org/cmake/help/v3.2/manual/cmake-toolchains.7.html#cross-compiling-for-linux

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