[CMake] how to build two libraries from same sources but with different defines?

[Richard Quirk]

On Fri, Apr 24, 2009 at 5:42 PM, Igor Karatayev <igor.cwer at gmail.com> wrote:
> Hello.
>
> I am building my library for two different processors arm7 and arm9.
> devkitArm requeres ARM7 or ARM9 macroses should be defined when
> building for any processor. I tried to write
>
> include_directories(./)
>
> set(SOURCES
>    src/library.cpp
>    )
>
>    add_definitions(-DARM7)
>    add_library(sandbox-arm7 ${SOURCES})
>    remove_definitions(-DARM7)
>    add_definitions(-DARM9)
>    add_library(sandbox-arm9 ${SOURCES})
>    remove_definitions(-DARM9)
>
> but it does not work as expected.

If you can, use the latest devkitArm (r25), which ships with a decent
default arm7 core - this lets you code just for the arm9 and it
simplifies a lot of the effort. If that's not possible, then Denis's
suggestion works a treat. I blogged a while ago on coding for the
Nintendo DS and using CMake, some ideas may help you out:

http://quirkygba.blogspot.com/2008/09/alternatives-to-make-part-1.html

regards
Richard