[CMake] Detect build type

[Filipe Sousa]

On Friday 22 April 2005 14:00, Brad King wrote:
> Filipe Sousa wrote:
> > I'm using it for two things: First, I need to control CMAKE_SKIP_RPATH, I
> > don't want rpath in release mode. Second, my application needs to know
> > where to find some resources in the source tree when I'm in the
> > development mode (that's when I set CMAKE_BUILD_TYPE to Debug), in the
> > release mode the application is able to find the resources in the
> > installation directory. Depending on the build type, cmake generates two
> > different files called PathResolver.cc that knows where to find the
> > application resources.
>
> I deal with some software packages that have both of these issues.
> Often I run things from the build tree even in release mode in the case
> of a heisenbug.  Usually I have separate release scripts that
> build/install/package a project.  In the build phase the scripts runs
> CMake with -DCMAKE_SKIP_RPATH:BOOL=ON to get rid of rpaths for the
> release build.
>
> For finding resources I usually configure a header file with macros
> containing strings indicating the build tree location and the relative
> path from the installed executable location to the installed resources.
>   Then at runtime the executable detects from argv[0] whether it is
> running from the build tree.  If so it uses the resources out of the
> build tree.  If not it looks relative to its location to find the
> installed resources.  This works well because I can then run the same
> executable from the build tree and install trees without compiling with
> different configurations.
>
> You could also use a separate switch that enables a "distribution
> release" mode intended to be enabled when building the project for
> binary distribution or at least installation on your machine.
>
> > How does cmake knows when to use CMAKE_CXX_FLAGS_DEBUG or
> > CMAKE_CXX_FLAGS_RELEASE?
>
> The makefile generator uses the build type to choose one.  The project
> file generators generate multiple configurations into the same build
> tree.  Each configuration uses the flags from the appropriate variable.
>   Then the build environment chooses a configuration at build time after
> CMake has finished.
>
> -Brad

I didn't know that if I run cmake with -DCMAKE_BUILD_TYPE=distribution cmake 
will look for CMAKE_CXX_FLAGS_DISTRIBUTION and CMAKE_C_FLAGS_DISTRIBUTION

-- Filipe Sousa

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://public.kitware.com/pipermail/cmake/attachments/20050422/42d96d99/attachment.pgp