CMake/Help/release/dev/delay-generator-toolset.rst
Brad King 528e8af19f Allow a toolchain file to specify a generator toolset
Delay use of CMAKE_GENERATOR_TOOLSET until the CMakeSystem.cmake
file has been configured and loaded during the first project() or
enable_language() command.  This gives the toolchain file named by
CMAKE_TOOLCHAIN_FILE a chance to set CMAKE_GENERATOR_TOOLSET.  This
point is still early enough to set the generator toolset prior to
the initialization of any languages that might use the toolset.

The cmake::GeneratorToolset member variable remains an indication
of what was specified by the -T option or loaded from the cache.
It does not need to be updated based on the toolchain file setting.
The cmMakefile::TryCompile can still pass cmake::GeneratorToolset
into the inner instance because the try-compiled project will do
platform and language initialization using the CMakeSystem module
configured for the outer project.

Extend the RunCMake.GeneratorToolset test with cases that use a
toolchain file to set CMAKE_GENERATOR_TOOLSET.
2014-06-04 14:27:02 -04:00

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delay-generator-toolset
-----------------------
* The :variable:`CMAKE_GENERATOR_TOOLSET` variable may now be
initialized in a toolchain file specified by the
:variable:`CMAKE_TOOLCHAIN_FILE` variable. This is useful
when cross-compiling with the Xcode or Visual Studio
generators.