On Apr 1, 2013, at 3:10 PM, Micha Hergarden <[email protected]> wrote:
> On 01-04-13 20:02, Braden McDaniel wrote:
>> When mixing a CMake Visual Studio build that has ExternalProjects (that is,
>> via ExternalProject_Add) that use non-CMake makefile builds, how does one
>> resolve the mismatch between the *_<config> variables
>> (CMAKE_CXX_FLAGS_RELEASE, etc.)?
>>
>> Specifically, how do I propagate the build flags in the *_<config> variables
>> down to the ExternalProject? I can't seem to find a way in CMake that will
>> let me pick which variable to propagate (that is, CMAKE_CXX_FLAGS_DEBUG when
>> I'm building the Debug configuration, CMAKE_CXX_FLAGS_RELEASE when building
>> the Release configuration, etc.).
>>
>> One option seems to be just to build the makefile-based ExternalProject four
>> times--one for each configuration CMake generates in its project files. But
>> that, too, has a problem: what if the makefile-based ExternalProject has a
>> dependency on another ExternalProject with a CMake build?
>>
>> Are there any good solutions to these sorts of problems?
>>
>
> In my project I've added wrappers for each stage:
>
> PATCH_COMMAND "${CMAKE_CURRENT_BINARY_DIR}/patchwrapper"
> CONFIGURE_COMMAND "${CMAKE_CURRENT_BINARY_DIR}/configurationwrapper"
> BUILD_COMMAND "${CMAKE_CURRENT_BINARY_DIR}/buildwrapper"
> INSTALL_COMMAND "${CMAKE_CURRENT_BINARY_DIR}/installwrapper"
>
> These wrappers include a defaults file that I create from a defaults.in,
> using configure_file command. That way I can set flags and all kinds of build
> related variables. Although officially it's not recommended to use it in
> generic cmake based projects, it works quite well for me as I don't
> distribute my project. I just use the external projects to precompile some
> third party tooling.
Thanks... I've made quite a bit of progress with this approach.
I'm attempting to use cmake -P for the wrapper script and I've been mostly
successful; though I've hit a bit of a speedbump that I'll outline in another
posting.
--
Braden McDaniel
[email protected]
--
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