CMake/Help/release/dev/try_compile-config-flags.rst

try_compile-config-flags
------------------------

* The :command:`try_compile` command source file signature now honors
  configuration-specific flags (e.g. :variable:`CMAKE_<LANG>_FLAGS_DEBUG`)
  in the generated test project.  Previously only the default such flags
  for the current toolchain were used.  See policy :policy:`CMP0066`.
try_compile: Add policy CMP0066 to honor CMAKE_<LANG>_FLAGS_<CONFIG> In the `try_compile` source file signature we propagate the caller's value of `CMAKE_<LANG>_FLAGS` into the test project. Extend this to propagate `CMAKE_<LANG>_FLAGS_<CONFIG>` too instead of always using the default value in the test project. This will be useful, for example, to allow the MSVC runtime library to be changed (e.g. `-MDd` => `-MTd`). However, some projects may currently depend on this not being done, so we need to activate the behavior using a policy. This change was originally made by commit v3.6.0-rc1~160^2 (try_compile: Honor CMAKE_<LANG>_FLAGS_<CONFIG> changes, 2016-04-11) but without the policy and so had to be reverted during the 3.6 release candidate cycle. Fixes #16174. 2016-06-28 22:10:18 +03:00			`try_compile-config-flags`
			`------------------------`

			* The :command:`try_compile` command source file signature now honors
			configuration-specific flags (e.g. :variable:`CMAKE_<LANG>_FLAGS_DEBUG`)
			`in the generated test project. Previously only the default such flags`
			for the current toolchain were used. See policy :policy:`CMP0066`.