[CMake] Multiple platforms/configurations

[J Decker]

On Tue, Nov 8, 2011 at 12:08 PM, Tom Deblauwe <Tom.Deblauwe at traficon.com> wrote:
> Hello,
>
> I have 2 build configurations for the same source code and I am generating visual studio 2005 projects. So for the first configuration I need different defines than for the second configuration. So I do like this:
>
> mkdir build1
> cd build1
> cmake -DPORT=bla ../source
> mkdir build2
> cd build2
> cmake -DPORT=foo ../source
>
> This generates 2 visual studio 2005 solutions, one in build1 and one in build2. Now there are two project files and two solutions and each has one configuration. However I am porting existing code and the old habit was that the two build configurations were in the same .vcproj and .sln file so you could easily switch between the two configurations in visual studio. Are there any cmake ways to make this happen, so to have one project with all the configs?
>

One option would be to use cmake to make a copy of yoru source files
to a destination in the binary directory; then build a sepeerate
project with the flags set appropriately, but still generate one
solution.  This lets different CFLAGS be defined per project, and use
the same sources;

something like....

FOREACH(SOURCE ${SACK_PLUSPLUS_SOURCES})
         EXECUTE_PROCESS(COMMAND cmake -E copy_if_different
${PROJECT_SOURCE_DIR}/${SOURCE} ${CMAKE_BINARY_DIR}/${BASENAME}.cpp )
ENDFOREACH(SOURCE)


> Best regards,
> Tom,
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