[CMake] Eclipse generator - basic macros

[Alexander Neundorf]

On Wednesday 15 July 2009, Miguel A. Figueroa-Villanueva wrote:
> On Tue, Jul 14, 2009 at 7:46 PM, Benjamin Schindler wrote:
> > Miguel A. Figueroa-Villanueva wrote:
> >> Just to be clear...
> >>
> >> If you have compiler dependent code:
> >>
> >> #if defined(_MSC_VER)
> >> ...
> >> #elif defined(__GNUC__)
> >> ...
> >> #else
> >> ...
> >> #endif
> >>
> >> Then you could do something like the following in CMakeLists.txt:
> >>
> >> if (CMAKE_COMPILER_IS_GNUC)
> >>  add_definitions(-DWORKING_WITH_GCC) # or use COMPILE_DEFINITIONS
> >> property elseif (MSVC)
> >>  add_definitions(-DWORKING_WITH_MSVC) # or use COMPILE_DEFINITIONS
> >> property
> >> endif()
> >>
> >> and the code above would look like:
> >>
> >> #if defined(WORKING_WITH_MSVC)
> >> ...
> >> #elif defined(WORKING_WITH_GCC)
> >> ...
> >> #else
> >> ...
> >> #endif
> >
> > Yes, I could do that. But that's a hack - it should not be needed. All
> > compilers have their macros which enables to differentiate between them,
> > so why adding a new one?
>
> Right, it is a hack (after all it is a work around) I was just curious
> to know where it wouldn't work... and I also wanted to make sure that
> the eclipse generator is feeding the manually added definitions
> correctly to the IDE.
>
> However, please do add this as a feature request at:
>
> http://public.kitware.com/Bug/my_view_page.php
>
> The following lines seem to dump the needed information:
>
> echo | gcc -v -x c -E -dD -
> echo | gcc -v -x c++ -E -dD -
>
> Add any other relevant information; even patches are welcome ;)

Once I have the list of builtin macros, how should they end up in the project 
files ?
Do you have any example files or pointers to documentation ?
Here's the entry in the bug tracker: 
http://public.kitware.com/Bug/view.php?id=9272

Alex