[CMake] VC++10 change WIN32_EXECUTABLE per configuration

[Brett Delle Grazie]

On 31 July 2012 01:05, Steve deRosier <derosier at gmail.com> wrote:
> I need a way to have the WIN32_EXECUTABLE property set off for debug
> builds and on for release builds when using the IDE.
>
> Here's the deal: For debug our code uses the standard main()
> construct, and for release we use the WinMain(). Lets just say there's
> a reason and leave it at that...
> The obvious solution is to be able to specify the '/subsystem:windows'
> flag myself in LINK_FLAGS_DEBUG and LINK_FLAGS_RELEASE.
>
> But, the generator overrides these settings for me.  So, I found the
> WIN32 for add_executable(), but of course you can't specify that
> differently for debug vs release.
>
> For a make-file generator, I could just utilize:
> if( "${CMAKE_BUILD_TYPE}" STREQUAL "Debug" )
> ...
> elseif( "${CMAKE_BUILD_TYPE}" STREQUAL "Release" )
> ...
> endif()
>
> but of course this doesn't work when generating for VS10 IDE.
>
> I found the CMAKE_CREATE_WIN32_EXE variable, but overriding it to ""
> does nothing, so I resorted to looking at cmake's source code, which
> totally ignores that variable, and hard codes the linker flag in the
> output based on the WIN32_EXECUTABLE property! (see line 1409 of
> cmVisualStudio10TargetGenerator.cxx).
>
> OK, other than hacking the cmake source and rolling our own, so is
> there any way to:
> 1. Override the setting after-the-fact but before the project files
> are actually written?
> 2. Set the WIN32_EXECUTABLE property on a per-configuration basis?
>
> At the moment I see four options-> hack the cmake source and roll our
> own; do some post-processing on the produced project files; Force
> everyone to manually change the flag in the IDE; convince my client to
> restructure some code so we don't encounter this problem in the first
> place.
>
> I'm hoping there's more options out there that are pure project.cmake
> file-based. Anyone?

How about just defining two different projects:

if (CMAKE_BUILD_TYPE STREQUAL "Debug")
  add_executable( sample_debug ${sample_SRCS})
else()
  add_executable( sample_release WIN32 ${sample_SRCS})
endif()

caveat empor: completely untested and off the top of my head.  Could
also use MATCHES in the if condition in case you have other build
types

>
> Thanks,
> - Steve
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-- 
Best Regards,

Brett Delle Grazie