[CMake] cross-compiling / host compiling

[Aeschbacher, Fabrice]

Thank you for responding

Actually, I noticed that putting following line in the CMakeLists.txt of the tool that should not be cross-compiled also works:

SET(CMAKE_C_COMPILER "gcc") 

The only drawback I found until now is that the native compiler (gcc) is not checked by cmake at startup (which is for us a minor issue)

Best regards,
Fabrice Aeschbacher

> -----Ursprüngliche Nachricht-----
> Von: Michael Wild [mailto:themiwi at gmail.com] 
> Gesendet: Donnerstag, 3. Juni 2010 14:15
> An: Alexander Neundorf
> Cc: cmake at cmake.org; Aeschbacher, Fabrice
> Betreff: Re: [CMake] cross-compiling / host compiling
> 
> 
> On 3. Jun, 2010, at 14:09 , Alexander Neundorf wrote:
> 
> >> I have a project where almost every sub-dirs should be 
> cross-compiled
> >> (arm-linux-gnuueabi-gcc), but one directory containing a 
> tool which must be
> >> compiled on the host (gcc) first.
> >> 
> >> Can you give me a hint about the best way to achieve this 
> with cmake?
> > 
> > They need to be compiled separately.
> > With cmake, one buildtree is always one toolchain, using 
> more than one 
> > toolchain in one buildtree is not supported.
> > 
> > So you first need to build the tool in a native build tree, 
> and then build the 
> > rest in a cross compiling tree.
> > You may want to "export" the tool from the native buildtree 
> and "import" it 
> > again in the cross compiling tree.
> > 
> > Alex
> 
> Or use an ExternalProject_Add for the native tool and then do 
> an ADD_EXECUTABLE(tool IMPORTED) in the cross compiling 
> top-level project.
> 
> Michael