[CMake] Setting properties to interface

[Tiago Macarios]

Hi,

Given a template-only library exposed throw an interface is it possible to
set the necessary CXX_STANDARD necessary to use the library? The code below
would be what I am trying to do.

add_library(a_lib INTERFACE)

set_property(TARGET a_lib
    PROPERTY CXX_STANDARD 11
    PROPERTY CXX_STANDARD_REQUIRED ON
)

target_compile_definitions(a_lib INTERFACE
    SOME_DEF
)


Unfortunately, this does not work and fails with:

  INTERFACE_LIBRARY targets may only have whitelisted properties.
  The property "CXX_STANDARD_REQUIRED" is not allowed.

Any ideas?

Tiago
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