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try_compile: Optionally forward custom platform variables to test project

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Add a `CMAKE_TRY_COMPILE_PLATFORM_VARIABLES` variable to specify a list
of custom variables to be forwarded to a `try_compile` test project.
This will be useful for platform information modules or toolchain files
to forward some platform-specific set of variables from the host project
(perhaps set in its cache) to the test project so that it can build the
same way.
This commit is contained in:
Brad King
2016-05-24 15:33:34 -04:00
parent fb4791b37c
commit d256ba078a
7 changed files with 58 additions and 0 deletions
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Help/command/try_compile.rst
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@@ -115,3 +115,7 @@ a build configuration.
Set the :variable:`CMAKE_TRY_COMPILE_TARGET_TYPE` variable to specify
the type of target used for the source file signature.
Set the :variable:`CMAKE_TRY_COMPILE_PLATFORM_VARIABLES` variable to specify
variables that must be propagated into the test project. This variable is
meant for use only in toolchain files.