It depends on the Generator.
To the Makefile, the actual type was controlled by the compiler options. If
you don't specific any type, usually it means non-debug and
non-optimization because the CMAKE_CXX_FLAGS is empty as default. This is
critical, so usually people should specific the actual type they want to
build.
To the generator of the IDE, such as Visual Studio and Xcode, the
CMAKE_BUILD_TYPE doesn't make sense but we have to use
CMAKE_CONFIGURATION_TYPES, then CMake will create the several configuration
sets for the IDE from the CMAKE_C|CXX_FLAGS_{CONFIG} .
On Wed, Aug 2, 2017 at 1:57 PM, Florian Lindner <mailingli...@xgm.de> wrote:
> Hi,
>
> Am 01.08.2017 um 16:59 schrieb J Decker:
> > I like having something like this.... defines CMAKE_BUILD_TYPE to be a
> droplist of choices...
> >
> > ----
> >
> > if( NOT CMAKE_CONFIGURATION_TYPES )
> > set( CMAKE_CONFIGURATION_TYPES debug release )
> > endif( NOT CMAKE_CONFIGURATION_TYPES )
> >
> > set( CMAKE_BUILD_TYPE release CACHE STRING "Cached cmake build type" )
> > set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
> ${CMAKE_CONFIGURATION_TYPES} )
>
> The droplist is really cool! Can't understand why it's not the default
> this way.
>
> https://cmake.org/cmake/help/v3.0/variable/CMAKE_CONFIGURATION_TYPES.html
> says "This has reasonable defaults on most
> platforms...", but when I message(${CMAKE_CONFIGURATION_TYPES}) it is
> empty. Why that?
>
> That code also does not seem to set the default:
>
> if(NOT CMAKE_CONFIGURATION_TYPES)
> set(CMAKE_CONFIGURATION_TYPES Debug Release RelWithDebInfo)
> endif()
>
> set(CMAKE_BUILD_TYPE Debug CACHE STRING "Build Type")
> set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
> ${CMAKE_CONFIGURATION_TYPES} )
>
> So the first commands set the cached value of the string "Build type". The
> second commands sets the property STRINGS of
> the variable CMAKE_BUILD_TYPE. Is that correct?
>
>
> # if (NOT CMAKE_BUILD_TYPE)
> # set(CMAKE_BUILD_TYPE Debug)
>
> Uncommenting this sets the default non builds with cmake, but not on
> ccmake (at least not in the GUI).
>
> # endif()
> message(STATUS "Build configuration: " ${CMAKE_BUILD_TYPE})
>
>
> Best Thanks,
> Florian
>
> >
> >
> > -----
> >
> > https://cmake.org/cmake/help/v3.0/variable/CMAKE_
> CONFIGURATION_TYPES.html
> >
> > On Mon, Jul 31, 2017 at 9:28 PM, Michael Ellery <mellery...@gmail.com
> <mailto:mellery...@gmail.com>> wrote:
> >
> >
> >
> > > On Jul 31, 2017, at 8:48 PM, Florian Lindner <mailingli...@xgm.de
> <mailto:mailingli...@xgm.de>> wrote:
> > >
> > > Hello
> > >
> > > ccmake shows CMAKE_BUILD_TYPE as unset. From the compile commands
> it looks like also nothing like Debug nor Release.
> > >
> > > Why is there no well-defined default set? How can I set a default?
> > >
> > > Thanks,
> > > Florian
> > > --
> > >
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> > >
> > > Please keep messages on-topic and check the CMake FAQ at:
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> >
> > my recollection is that an unspecified build type results in a build
> that has no optimizations and no debug symbols
> > generated. I’m not sure what the motivation for those default flags
> is. If you want to default to DEBUG, something
> > like this should work:
> >
> > if (NOT CMAKE_BUILD_TYPE)
> > set(CMAKE_BUILD_TYPE Debug)
> > endif()
> >
> >
> > -MIke
> >
> > --
> >
> > Powered by www.kitware.com <http://www.kitware.com>
> >
> > Please keep messages on-topic and check the CMake FAQ at:
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> >
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>
> Powered by www.kitware.com
>
> Please keep messages on-topic and check the CMake FAQ at:
> http://www.cmake.org/Wiki/CMake_FAQ
>
> Kitware offers various services to support the CMake community. For more
> information on each offering, please visit:
>
> CMake Support: http://cmake.org/cmake/help/support.html
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> CMake Training Courses: http://cmake.org/cmake/help/training.html
>
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Kitware offers various services to support the CMake community. For more
information on each offering, please visit:
CMake Support: http://cmake.org/cmake/help/support.html
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