882f48e5ba
When CMP0003 was first introduced we wanted to link all libraries by full path. However, some projects had problems on platforms where find_library would find /usr/lib/libfoo.so when the project really wanted to link to /usr/lib/<arch>/libfoo.so and had been working by accident because pre-CMP0003 behavior used -lfoo to link. We first tried to address that in commit v2.6.0~440 (Teach find_library to avoid returning library paths in system directories, 2008-01-23) by returning just "foo" for libraries in implicit link directories. This caused problems for projects expecting find_library to always return a full path. We ended up using the solution in commit v2.6.0~366 (... switch library paths found in implicit link directories to use -l, 2008-01-31). However, the special case for libraries in implicit link directories has also proven problematic and confusing. Introduce policy CMP0060 to switch to linking all libraries by full path even if they are in implicit link directories. Explain in the policy documentation the factors that led to the original approach and now to this approach.
22 lines
900 B
ReStructuredText
22 lines
900 B
ReStructuredText
CMAKE_POLICY_WARNING_CMP<NNNN>
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------------------------------
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Explicitly enable or disable the warning when CMake Policy ``CMP<NNNN>``
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is not set. This is meaningful only for the few policies that do not
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warn by default:
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* ``CMAKE_POLICY_WARNING_CMP0025`` controls the warning for
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policy :policy:`CMP0025`.
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* ``CMAKE_POLICY_WARNING_CMP0047`` controls the warning for
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policy :policy:`CMP0047`.
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* ``CMAKE_POLICY_WARNING_CMP0056`` controls the warning for
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policy :policy:`CMP0056`.
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* ``CMAKE_POLICY_WARNING_CMP0060`` controls the warning for
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policy :policy:`CMP0060`.
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This variable should not be set by a project in CMake code. Project
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developers running CMake may set this variable in their cache to
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enable the warning (e.g. ``-DCMAKE_POLICY_WARNING_CMP<NNNN>=ON``).
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Alternatively, running :manual:`cmake(1)` with the ``--debug-output``
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or ``--trace`` option will also enable the warning.
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