CMake: replace PROJ_TESTS with CTest's BUILD_TESTING option #1870
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As mentioned in #1263 this PR replaces
PROJ_TESTS
with CTest'sBUILD_TESTING
option, which is more generic to CMake projects. CTest (when included) automatically creates aBUILD_TESTING
option, with a default ON. Backwards compatibility to the older optionPROJ_TESTS
is supported, but shows a deprecation message.For example, a speedy build that does not require tests, configure a build like this:
(as expected)