I'm trying out my project on 3.3.0-rc1, but currently I'm using 2.8.11 and
2.8.12. I got a couple errors from CMP0046. Most of them are correct: I've
fixed a couple places where a non-existent dependency was used, and I want to
set this policy to NEW so that more do not sneak in.
However there is a problem. I have a test that dynamically loads a bunch of
.so's, as configured by a .xml file to ensure they are compatible. Some of the
.so's are in the same project and some are from a different project and
installed into the system at build time. We are running tests as part of the
make all target, (easy to do with a few add_custom_command/add_custom_target).
The obvious problem is this test needs to have all the .so's built before the
test runs, but it doesn't link them. This was easy enough - I just parsed the
.xml for the name of the .so and place that name into an add_dependencies. That
works great in cmake 2.8.11.
In cmake 3.3.0-rc1 it doesn't work. Some of the .so's are installed on the
system and not built in the project. Obviously no target exists for them. What
I want to do to solve this is:
cmake_policy(PUSH)
if(POLICY CMP0046)
CMAKE_POLICY(SET CMP0046 OLD)
endif()
add_dependencies(${MyTestRunTarget} ${XML_PARSED_DEPENDENCIES})
cmake_policy(POP)
This does not work. It appears that the policy is not actually checked until
long after the add_dependencies line is done processing, and the fact that I
want to suppress the policy for just these is not carried along.
Is there some way to achieve changing this policy for just a few select targets?
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