[CMake] CMake built with Apache stdcxx has problems?

[Attila Nagy]

Hi Bill,

thanks for looking into this! I'll give your suggestions a try in the following days. 
Hereby I cc Steve, so he's aware of the outcome of this issue too.


Thanks again,
Attila

--- On Tue, 4/6/10, Bill Hoffman <bill.hoffman at kitware.com> wrote:

> From: Bill Hoffman <bill.hoffman at kitware.com>
> Subject: Re: [CMake] CMake built with Apache stdcxx has problems?
> To: "Attila Nagy" <nagy.attila at yahoo.com>
> Cc: cmake at cmake.org
> Date: Tuesday, April 6, 2010, 8:30 PM
> Attila Nagy wrote:
> > Here is the file:
> >
> www.orl.szote.u-szeged.hu/~attila/Slicer3Config-stdcxx.cmake
> > 
> > Here is another version of that same file, from the
> same sources, when CMake is compiled with STLport4, for
> reference (this is the file from my current Slicer3-build
> dir):
> >
> www.orl.szote.u-szeged.hu/~attila/Slicer3Config-stlport.cmake
> > 
> 
> OK, I think we found the problem...
> 
> 
> http://viewvc.slicer.org/viewcvs.cgi/trunk/Libs/CMakeLists.txt?rev=12514&view=markup
> 
> Macro in CMake\Slicer3PersistenceMacros.cmake
> 
> http://viewvc.slicer.org/viewcvs.cgi/trunk/CMake/Slicer3PersistenceMacros.cmake?rev=6774&view=log
> 
> Seems that it is from a work around for CMake older than
> 2.6:
> 
> #-----------------------------------------------------------------------------
> # Temporary hack to set/get persistent values accross
> subdirs until 2.6 comes
> # Neither set_source_file_properties nor set(... INTERNAL
> FORCE) would work
> 
> #-----------------------------------------------------------------------------
> macro(slicer3_set_persistent_property property_name)
>   set(_file
> "${CMAKE_BINARY_DIR}/persistent/${property_name}")
>   file(WRITE "${_file}" "${ARGN}")
>   #set(__${property_name} ${value} CACHE INTERNAL ""
> FORCE)
> endmacro(slicer3_set_persistent_property property_name
> value)
> 
> #-----------------------------------------------------------------------------
> macro(slicer3_get_persistent_property property_name
> var_name)
>   set(_file
> "${CMAKE_BINARY_DIR}/persistent/${property_name}")
>   if(EXISTS "${_file}")
>     file(READ "${_file}" ${var_name})
>   else(EXISTS "${_file}")
>     set(${var_name})
>   endif(EXISTS "${_file}")
>   #set(${var_name} ${__${property_name}})
> endmacro(slicer3_get_persistent_property property_name
> var_name)
> 
> 
> You could change that macro to not use file
> WRITE.   IF you want to track this down in
> CMake, you could try some small examples with a CMake built
> with both versions of stdc++.   You could use
> file(WRITE and file(READ to write/read some lists from a
> file.
> 
> But, sounds like it is time to remove the temporary hack in
> Slicer...
> 
> 
> -Bill
>